JP2572652Y2 - Pipe inner surface observation tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner surface observing tool applied to a boiler header and the like.

[0002]

2. Description of the Related Art Conventionally, a tool for observing an inner surface of a header is provided by using a mechanism for rotating a small camera and an illuminating lamp for each of direct observation (axial view) and side view (side view). Yes. The driving method is performed by a motor provided in a tool or a remote driving operation method from outside the pipe.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional method,
The mechanism of the tool becomes complicated, and there is a dimensional limit in applying it to a smaller diameter inspection hole.

The present invention provides a tool for observing the inner surface of a pipe, which solves the above-mentioned problems.

[0005]

The present invention employs the following means to solve the above-mentioned problems.

That is, as a pipe inner surface observation tool, an inspection
A cylindrical case having a smaller diameter than the inspection hole of the elephant tube, and an opening at one end, which accommodates an illumination lamp with the irradiation optical axis directed outward from the opening, and a 45 ° optical axis on the outside surface to the irradiation optical axis A lamp case having a head plate attached at an angle and having the base end side of the illuminating lamp on the head side hinged to one end of the cylindrical case; and an axial direction near an inner surface of the cylindrical case. The cylinder is arranged, and one end is pin-connected to the vicinity of the mounting portion of the lamp case, and the other end is pin-connected to the cylindrical case. And a CCD camera with a motorized focus adjustment slide attached to the lamp case. The lamp case includes the illumination optical axis, the optical axis of the head plate, and the CC.
In the plane including the optical axis of the D camera, the illumination optical axis can rotate within the range of 0 ° to 90 ° from the optical axis of the CCD camera, and when 90 °, the optical axis of the CCD camera is at the center of the mirror plate. It was configured to pass through.

[0007]

For example, when observing the inner surface of a tube to be inspected having an inspection hole smaller than the inner diameter, the irradiation optical axis of the illumination lamp is set to CCD.
Insert the cylindrical case 90 ° from the optical axis of the camera, with the lamp case facing forward from the inspection hole. When the illumination lamp is turned on, the inside of the tube is illuminated. The reflected light from the illuminated portion enters the CCD camera direction via the mirror plate. Thus, when the focus is adjusted by actuation of the motorized focus adjustment slide, the illuminated portion within the tube can be observed.

By operating the cylinder to set the irradiation optical axis to 0 ° and illuminating the front of the cylindrical case,
The front tube inner surface can be easily observed.

Thus, the tube inner surface can be observed easily and in detail by inserting it through the small-diameter hole.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. On the inner surface of the end of the cylindrical case 1 having a smaller diameter than the inspection hole a ,
A small CCD camera 6 with an electric focusing slide 7 is mounted along the axis.

The lamp case 2 has an opening b at one end. The illumination lamp 3 is mounted therein with the irradiation axis c directed outward of the opening b. A mirror plate 4 is attached to the outer surface of the lamp case 2 with the optical axis d inclined 45 ° from the irradiation axis c. The base end side of the illuminating lamp 3 outside the end plate 4 side of the lamp case 2 is attached to the end of the cylindrical case 1 via a hinge 9. One end of an air cylinder 5 arranged parallel to the axis near the inner side surface in the cylindrical case 1 is pin-connected near the hinge 9 of the lamp case 2. Further, the other end is pin-connected to the inner surface of the cylindrical case 1.

The positional relationship between the illumination lamp 3, the end plate 4, and the CCD camera 6 is such that the irradiation axis c and the optical axes d and e are on the same plane, and the irradiation axis c is 90 ° to 0 ° with respect to the optical axis e. You can rotate in the range. When the irradiation axis is 90 °, the optical axis e is in a positional relationship passing through the center of the end plate 4.

In the above, when observing the inner surface of the inspection object tube 01 having one end closed and having the inspection hole a, the illumination lamp 3 is inserted through the inspection hole a with the irradiation axis c of the lamp 3 set at 90 °.
Then, when the illumination lamp 3 is turned on, the inner surface of the tube 01 is illuminated. The reflected light is reflected by the mirror plate 4 and the camera lens 1
The image is received by the CCD camera 6 through 0 and is displayed on a display (not shown). The focus of the image is adjusted by operating the motor 8.

When observing the front, when the pneumatic cylinder 5 is actuated and extended, as shown in FIG. 2, the lamp case 2 is pivoted at the hinge 9 and the irradiation axis c is set at 0 °. Become. Then, since the inner surface of the front tube 01 is illuminated, the image is captured by the CCD camera 6 and can be observed.

In this manner, the tube 01 can be easily inserted through the small-diameter inspection hole a, and the inside of the tube 01 can be observed in detail by a simple operation.

[0016]

As described above, according to the present invention, it is possible to observe the inner surface of a boiler tube header having a small-diameter inspection hole, which could not be applied heretofore. In addition, observation work is performed easily and quickly,
Since appropriate observations can be made, it helps to improve efficiency and reliability.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of one embodiment of the present invention.

FIG. 2 is an operation explanatory view of the embodiment.

[Explanation of symbols]

 01 Tube a Inspection hole 1 Cylindrical case 2 Lamp case 3 Illumination light 4 End plate 5 Pneumatic cylinder 6 Small CCD camera 7 Electric focus adjustment slide 8 Motor 9 Hinge 10 Camera lens

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hirofumi Hanazawa 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Inside Kobe Shipyard of Mitsubishi Heavy Industries, Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) G01N 21/84-21/91 H04N 7/18 A61B 1/00-1/32

Claims (1)

(57) [Scope of request for utility model registration] A cylindrical case having a diameter smaller than an inspection hole of a tube to be inspected, an illumination lamp having an opening at one end and having an irradiation optical axis directed outward of the opening, and having the irradiation optical axis on an outer surface thereof; A lamp case having a mirror plate attached with a 45 ° optical axis inclined thereto, and a base end side of the illumination lamp on the mirror plate side hinged to one end of the cylindrical case; and a vicinity of an inner surface of the cylindrical case. The cylinder is arranged along the axial direction, and one end is pin-connected near the mounting portion of the lamp case and the other end is pin-connected to the cylindrical case, and on the inner surface of one end of the cylindrical case. A CCD camera with a motorized focus adjusting slide mounted with the optical axis directed in the axial direction, wherein the lamp case irradiates the same light in a plane including the irradiation optical axis, the optical axis of the head plate, and the optical axis of the CCD camera. Optical axis is the same CCD It not 0 ° from camera optical axis 90
A tube inner surface observing tool characterized in that it can be rotated in the range of ° and the optical axis of the CCD camera passes through the center of the end plate when the angle is 90 °.