JPH0687853U - Pipe inspection device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pipe inspection device capable of visually inspecting a cut surface or a groove surface of a pipe tip even for a pipe that an operator cannot easily approach. [Structure] A trolley (2) having traveling wheels (3) traveling along the inner surface of a pipe (1), and a trolley that is arranged coaxially with the axis of the pipe by the trolley and is rotatably supported about the axis. Camera holder (5), a camera (6) held by the camera holder, and a mirror (7) provided in front of the camera at a distance and in an inclined state, and the camera and the mirror together with the camera holder. Drive means (8) for rotating the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe inspection device which is inserted into a pipe and is used for visually inspecting a cut surface or a groove surface at the tip of the pipe.

[0002]

[Prior art]

 Visual inspection may be performed to see if the cut surface or groove surface of the pipe tip has a predetermined shape.In the past, this visual inspection of the pipe tip was performed by an operator by directly bringing the face close to the tip of the pipe. It was customary to do.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional pipe inspection, there is a problem that the inspection cannot be performed if the worker cannot easily approach the tip of the pipe to be inspected because the pipe is arranged in a narrow space. It was In this case, it is possible to arrange the pipe at a predetermined location after performing a visual inspection in advance, but when the shape of the end of the pipe changes after construction, or when modification work or maintenance work is performed, etc. However, there is a case where it is necessary to visually inspect the tip portion of the already installed pipe, and at this time, the above-mentioned conventional visual inspection cannot deal with it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cutting surface or a groove surface of a pipe tip even for a pipe that an operator cannot easily approach. It is to provide a pipe inspection device capable of performing a visual inspection.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a pipe inspection device which is inserted into a pipe and used for visually inspecting a cut surface or a groove surface of the pipe, wherein an inner surface of the pipe is A carriage having traveling wheels that travel along the axial direction, a camera holder that is arranged coaxially with the axis of the pipe by the carriage, and is rotatably supported around the axis, and the camera holder. A camera held by the tool, a mirror provided in front of the camera at a distance from the axis of the camera holder, and a mirror for reflecting the image of the end of the pipe to the camera; and the camera holder. It is configured to include a driving means for rotating the camera and the mirror.

[0006]

[Action]

 The pipe inspection device according to the present invention is inserted from the base end side of the pipe and is moved to the tip position of the pipe by running traveling wheels on the inner surface of the pipe. At this time, a part of the tip of the pipe is photographed by the camera through a mirror. When the driving means is operated in this state, the camera and the mirror rotate integrally with the camera holder, so that the front end of the pipe is photographed by the camera over the entire circumference. Therefore, a worker can visually inspect the cut surface or groove surface of the pipe tip through a monitor TV connected to the camera without directly approaching the pipe.

[0007]

【Example】

 An embodiment of the pipe inspection apparatus according to the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 is a pipe to be inspected, 2 is a carriage having wheels 3 for traveling, 4 is a stable wheel, 5 is a camera holder, 6 is a camera, 7 is a mirror, and 8 is a camera holder. Reference numeral 9 denotes a driving means for rotating the vehicle 5, and 9 denotes a camera holder receiver interposed between the carriage 2 and the camera holder 5.

The bogie 2 is provided with the traveling wheels 3, 1 at the front and rear ends of the lower surface thereof with a space left and right respectively, and is engaged with the hook 10 at the rear end as shown in FIG. It is moved in the pipe 1 by being pushed out, pulled in, or operated through the operation rod 11. Further, the stable wheel 4 abutting against the inner surface of the upper portion of the pipe 1 is provided at the tip of the rod 12 which is erected approximately at the center of the rear end portion of the trolley 2, so that the trolley 2 can be piped in a stable state. It runs in 1.

The camera holder 5 is composed of a holder main body 5a formed in a bottomed cylindrical shape and a lid 5b welded to the head of the holder main body 5a. Almost coaxially arranged. If necessary, height adjusting means for adjusting the height of the camera holder is provided between the carriage 2 and the camera holder 5 so that the camera holder 5 is coaxial with the axis of the pipe 1. May be accurately aligned.

A bracket 13 is provided substantially in the center of the bottom of the holder main body 5 a, and the bracket 6 holds the camera 6 coaxially with the camera holder 5 and the axis of the pipe 1. In addition, a cable chamber 15 having a cylindrical shape with a bottom is attached to the base end side of the camera holder 5 by a connecting metal fitting 16 coaxially with the axis of the camera holder 5. Then, the cable 6a extending from the camera 6 extends into the cable chamber 15 through a hole 5c provided at the base end portion of the camera holder 5, and from there, a hole 15a provided at a side portion of the cable chamber 15 and It extends to the lower side of the truck 2 through a hole 2a provided in the truck 2, and from there to the base end side of the pipe 1.

The camera 6 converts an image of the tip of the pipe 1 reflected by the mirror 7 into an electric signal, and a signal output from the camera 6 is an image obtained by the camera controller 17 and the image as shown in FIG. It is sent to the monitor television 19 through the inversion device 18, and is output from the monitor television 19 in the form of an image. Further, the lens built in the camera 6 is enlarged and reduced according to an instruction signal from the camera controller 17, and position control in the front-rear, left-right direction is performed. A camera case 30 is provided on the outer peripheral portion of the camera 6, and a light (not shown) for irradiating the tip of the pipe through the mirror 7 is incorporated in the camera case 30.

The mirror 7 is arranged so as to be inclined at an angle of about 45 degrees with respect to the axis of the camera holder 5 by a rod 21 provided so as to penetrate the camera holder 5. The light emitted from the light built in the camera case 30 is applied to the tip portion of the pipe 1 which is the inspection target portion through the opening 5d on the tip side of the camera holder 5, and the tip portion of the pipe 1 is The image of is reflected on the camera 6 in reverse. Reference numeral 22 is an adjusting means for finely adjusting and adjusting the tilt angle of the mirror 7.

The drive means 8 is provided on the proximal end side of the cable chamber 15 such that one end of the intermediate rod 23 is coaxial with the axis of the cable chamber 15 and the camera holder 6, and the other end of the intermediate rod 23 is provided. Is connected to the output shaft of a motor 26 via gears 24, 25. The camera holder 6 has the intermediate rod 23 connected through the cable chamber 15 supported by a bearing 27, and the camera holder having an arc-shaped plate between the camera holder 6 and the carriage 2. Since the holder receiver 9 is interposed, it is supported in a double-sided state. In FIG. 2, 28 is a motor power source and 29 is a light source unit.

An inspection method using the pipe inspection device having the above configuration will be described. First, the pipe inspection device is inserted from the base end side of the pipe 1 with the camera holder 5 on the front side. Subsequently, the operating rod 11 engaged with the hook 10 at the rear end of the carriage 2 is pressed to move the inserted pipe inspection device to a position facing the tip of the pipe 1. At this time, since the traveling wheels 3 and the stabilizing wheels 4 travel on the inner surface of the pipe 1, the pipe inspection device can be supported at three points at all times, so that the pipe inspection device can be moved in a relatively stable posture. Further, while the pipe inspection apparatus is moving, the inner surface of the pipe 1 is successively captured by the camera 6 through the mirror 7, and the state thereof is displayed on the television monitor 19. Therefore, the operator can determine whether or not the pipe inspection device has reached the tip portion of the pipe 1 by observing the television monitor 19. Since the length of the pipe 1 is known in advance, based on the insertion length of the operation rod 11, the pipe inspection device makes an approximate judgment as to whether or not the pipe inspection device has reached the tip portion of the pipe 1. The camera 6 may be used only when the pipe is accurately aligned with the tip portion of the pipe.

When the pipe inspection device reaches the tip portion of the pipe 1, the pressing operation by the operation rod 11 is stopped at that time, and the motor 26 is rotated. The rotational force of the motor 26 is transmitted to the cable chamber 15 and the camera holder 8 via the gears 25 and 24 and the rod 23, whereby the camera 6 and the mirror 7 rotate integrally with the camera holder 5. In this way, since the camera 6 and the mirror 7 rotate integrally with the camera holder 5, the tip end portion of the pipe 1 that is the inspection target portion is photographed by the camera 6 over the entire circumference. The image photographed by the camera 6 is projected on the television monitor 19 through the camera controller 17 and the image reversing device 18. Therefore, an operator can visually inspect the cut surface or groove surface of the pipe tip without directly approaching the pipe 1.

Since the camera 6 and the mirror 7 are arranged coaxially with the axis of the camera holder 5, the distance from the center of the mirror 7 to the tip of the pipe is almost the same when rotated as described above. Since it is kept constant, the camera 6 has an advantage that a stable image can be obtained. Further, the cables 6a extending from the camera 6 are collectively inserted into the cable chamber 15 provided separately from the camera holder 5, so that when the camera 5 and the like are rotated together with the camera holder 6, the cables 6a are not connected to each other. It is possible to prevent the occurrence of troubles such as being entangled with each other and interfering with the inspection.

Further, in this embodiment, an image reversing device 18 is provided between the camera controller 17 and the monitor TV 19 so that the image reversed by the mirror 7 is restored to the original state. Since it is shown on the screen, the worker can easily inspect the groove surface and the like.

In the above embodiment, the camera holder 5 and the cable chamber 15 are provided separately, but the invention is not limited to this, and they may be provided integrally. Further, in this embodiment, the bottomed cylindrical camera holder 6 is used to hold the camera, but the present invention is not limited to this, and the camera holder of another shape (for example, a frame shape in which simple steel is combined) is used. It may be held by the tool 6.

[0019]

[Effect of device]

 As described above, according to the present invention, a bogie having a traveling wheel that runs on the inner surface of the pipe along the axial direction of the pipe, and the bogie that is arranged coaxially with the axial line of the pipe by the bogie A camera holder that is rotatably supported in the center, a camera held by the camera holder, and an image of the tip of the pipe that is installed in front of the camera with a gap from the axis of the camera holder. Since the mirror that reflects to the camera and the driving means that rotates the camera and the mirror together with the camera holder are provided, the tip of the pipe can be photographed by the camera over the entire circumference. A visual inspection of the cut surface or groove surface of the pipe tip can be performed without directly approaching the pipe.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a pipe inspection device according to the present invention.

FIG. 2 is a side sectional view for explaining the operation of one embodiment of the pipe inspection device.

3 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 Piping 2 Bogie 3 Wheel for Traveling 4 Stable Wheel 5 Camera Holder 6 Camera 7 Mirror 8 Drive Means 11 Operation Rod 15 Cable Chamber 17 Camera Controller 18 Image Inverter 19 Monitor TV 26 Motor

Claims (1)

[Scope of utility model registration request] 1. A pipe inspection device which is inserted into a pipe and is used for visually inspecting a cut surface or a groove face at a tip of the pipe, the pipe inspection device running on an inner surface of the pipe along an axial direction of the pipe. A carriage having a traveling wheel, a camera holder that is arranged coaxially with the axis of the pipe by the carriage and is rotatably supported about the axis, and a camera held by the camera holder. A mirror that is provided in front of the camera at a distance and is inclined with respect to the axis of the camera holder to reflect the image of the tip of the pipe to the camera, and a drive that rotates the camera and the mirror together with the camera holder. And a pipe inspection device.