JPS6186719A - Inspection periscope reflector device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an inspection device for inspecting the inner surface of a cylinder, etc., and particularly for long cylinders installed in places such as nuclear facilities where people cannot enter due to high radiation. The present invention relates to an inspection periscope reflector device suitable for observing the inside of a device over a wide range by remote control.

[Background of the invention]

In conventional inspection devices that combine a periscope and a reflecting mirror, only a type in which the periscope and a reflecting mirror are integrated has been put into practical use, and this type has the following drawbacks.

(1) The conventional periscope 101 and reflecting mirror 102 shown in FIG. 12 are mechanically rigidly coupled, and the reflecting mirror alone cannot be moved to the object to be inspected.

For this reason, the inspection range was limited to a narrow area only in the vicinity of the reflecting mirror installation portion (Japanese Patent Laid-Open No. 82218/1983).

(2) In the conventional example shown in Fig. 13, when attempting to observe the inside of a long cylinder over a wide range, the observation mirror must be attached to the tip of a telescopic mechanism such as a telescopic tube. However, such a configuration (JP-A-57-
26791), periscope 107 and reflector 11
0 are integrated via the telescopic tube 108, the overall shape of the inspection device becomes large, and a large space is required for installation in order to install the device on the object to be inspected. The periscope 107 is installed horizontally, and the telescopic tube 108 is a cylindrical tube that moves vertically and has an inverted shape. For this reason, in a facility where a wall is used to shield the area between the control room where people are located and the hot cell where no one can enter, the reflection integrated with the periscope 107 can be seen through a hole about the outside diameter of the periscope 107 provided in the wall. It is not possible to insert a telescopic tube 108 with a mirror into a hot cell. A reflector 1 integrated with a telescopic tube 108 is inserted into the hot cell from the operation room side.
If it is necessary to insert No. 10, the shielding wall must be broken and inserted, which poses problems such as radioactive materials flowing into the operation room from the hot cell side and a large amount of cost required to destroy the shielding wall. Yes, it is not practical.

When the inner surface of a long cylindrical device with a relatively small diameter is to be inspected, the center of the long cylindrical device and the telescopic tube 108
It is necessary to align the centers of the two. periscope 10
Since the relative distance t between 7 and the axial center of the telescopic tube 108 is always constant, if the long cylindrical device that is the object to be inspected is set with rough precision like that of a general building, Since the relative distance t between the periscope 107 and the telescopic tube 108 cannot be adjusted,
Misalignment occurs, making insertion and inspection impossible.

[Purpose of the invention]

The object of the present invention is to be able to inspect a wide range of the inner surface of a long cylindrical device installed in a facility where no one can enter, and to have the ability to sufficiently adjust for errors in the installation of the object to be inspected. An object of the present invention is to provide a compact and remotely controllable inspection periscope reflector device.

[Summary of the invention]

In order to eliminate the drawbacks of the prior art described above, the present invention constructs a periscope reflector device for inspection based on the following considerations.

In conventional devices, the periscope and reflector are mechanically rigidly coupled, which narrows the observation range.
The degree of freedom is ensured only by optical coupling. the result,
No telescopic tube is required9, reducing weight and making it more compact.

In order to inspect a wide range of the inner surface of the long cylindrical device, the reflector is divided into an elevating device section and a reflecting mirror device section, and these devices are connected by wires and electric cables. An observation mirror is built into the reflecting mirror unit, and a wire winding and a wire lifting device for vertically moving the observation mirror over a wide range are attached to the top of the long cylindrical device. Furthermore, the inside of the reflecting mirror device, the lifting device, the wires, and the electric cables are arranged so that the central portion is hollow so that the light from the observation mirror inside the reflecting mirror device can be received by the reflecting mirror at the tip of the periscope.

In particular, the electric cable should be a coiled cable with a hollow center so that it can fully follow the rise and fall of the reflecting mirror unit and not block the light from the observation mirror.

In order to inspect the object without any problems even if there is an installation error in the object to be inspected, the tip of the periscope is reflected according to the amount of deviation so that it can receive the light from the observation mirror of the reflector unit inserted into the object to be inspected that has shifted. The mirror part is movable, the periscope tip reflector part is movable back and forth, and the tip reflector part has a structure that can be rotated left and right using one end of the tip part reflector as a rotation support shaft. In addition, if the cylindrical device that is the object to be inspected is tilted, a mechanism for raising and lowering the reflector provided in the reflector at the tip of the periscope, a mechanism for rotating the entire periscope about the center in the axial direction of the periscope's long body, and a periscope are also available. The mechanisms for rotating the tip reflector left and right are combined to align the optical axis with the observation mirror in the reflector unit.

Because the periscope and reflector device are separate, the periscope can be easily inserted using a plug hole that is typically provided in the shielding wall of the high radiation cell. On the other hand, the reflector device can be lifted and moved by a crane or hoist from the door provided in a normal high-radiation cell, and can be easily attached to the top of the object to be inspected.

[Embodiments of the invention]

Embodiments of the present invention will be described with reference to FIGS. 1 to 11.

FIG. 1 is a schematic diagram showing an embodiment of the present invention. A periscope reflector for inspection in a remote inspection device consisting of a combination of a periscope and a reflector, characterized in that the periscope 1 and the reflector device 4 are each independent devices and are not mechanically coupled but optically coupled. It is a device. The main places where the present invention is used are in places where humans cannot enter, such as areas with high radiation atmospheres or contaminated areas with high radioactivity. Side wall for shielding 15. The periscope 1 is inserted through a small opening provided in the shielding wall into a vertical inspection object 6 installed in a shielded room 16 that is shielded by ceiling walls and floor walls 14 and cannot be accessed by humans. The periscope 1 and the reflecting mirror device 4 are used in optical combination by lifting the reflecting mirror device 4 carried in through a small opening with a crane 21 and moving it, and installing it above the object to be inspected 6. In order to observe the inside of the vertical inspection object 6 over a wide range, the reflecting mirror device is composed of an elevating device 17, a reflecting mirror device section 29, and a cable processing section 3, such as an electric cable for the reflecting mirror device section.

The reflecting mirror device section 2 can be raised and lowered by winding up and returning the raising and lowering wire 18 using the raising and lowering device 17.

The reflecting mirror unit 2 has a built-in observation mirror 5, and the image of the object to be inspected is reflected by the observing mirror 5, and the image of the object to be inspected is reflected by the observing mirror 5.
Cable processing section 3. The light passes through the inner part S of the lifting device 17 and is reflected by the tip reflector 7 of the periscope 1. The reflected light passes through the inside of the long body of the periscope 1 having an objective lens and is observed by an eyepiece 13.

The image No. 2 can be directly observed by a person in the operation room using the eyepiece lens 13, and can also be viewed using the television camera 2 as an attachment.
If 0 is set, the image can also be displayed on the monitor 12.

Nine electric cables 8 for remote control of the reflector device 4
is inserted into the hot cell through the cable penetration 9, and a person in the operation room remotely connects the male and female connectors using a remote control such as a manipulator while monitoring the hot cell room 16 through the shielding glass window 15a. do. The reflecting mirror device 4 is remotely controlled from the control device board 11.

In addition, the direction in which the reflector device 2 faces on the circumference within the inspection object 6, the tilt angle, etc. are detected using a phase detection encoder, etc., and the observed part is clearly determined. It is as it should be.

According to this embodiment, the inner surface of the inspection object 6 installed in a facility where no one can enter can be inspected over a wide range, and the periscope 1 and the reflector device 4 are each independent devices. , the device becomes very compact. Additionally, the periscope 1 and reflector device 4 are said to be very easy to install. Also,
Since the electric cable for control can be connected remotely and the reflector device works independently, the reflector device can be given complex rotation, tilting, etc. functions, and if necessary, it can be used to prevent fogging of the observation mirror. A heater can be installed.

FIG. 2 shows another embodiment. In this embodiment, the reflector device 2 is mounted on a separate crane 21 not only during installation but also during use.
The device is raised and lowered by the cylindrical lever to bring it close to the area to be inspected. The image from the observation mirror 5 is received by the tip reflecting mirror 7 of the periscope 1, and the reflecting mirror device 2, which can be observed in the same manner as in the first illustrated embodiment, connects the lifting wire 1B to the hanging tool 21b.
It is attached to the crane hook 21g using a crane hook 21a, and is inserted into the long cylindrical device that is the object to be inspected by lowering the crane hook 21a, making it possible to observe the part to be inspected. 2a shows the state of the reflector device close to the part to be inspected.

In the present invention, since the reflector device 2 is directly inserted into the object to be inspected using a crane installed in the hot cell, there is no need to provide the reflector device with an elevating function, making the reflector device simpler and more compact. can.

FIGS. 3 to 7 are diagrams showing the rotation and tilting mechanisms. If the object to be inspected in the hot cell is eccentric or tilted from its normal position due to poor installation accuracy, the tip of the periscope is designed so that it can receive light even if the optical axis of the reflector device shifts. The mirror is equipped with mechanisms for moving back and forth, left and right, and tilting up and down.

FIG. 3 shows the tip of the periscope 1. FIG. The light from the observation mirror 5 is reflected by the reflecting mirrors 41 and 4 at the tip of the periscope.
2. and reflected by the elevation mirror 43, 47a, 47b, 47
c, 47d, and 47e, pass through the lens barrel 45, and reach the eyepiece lens 13. The reflecting mirror 419 and the reflecting mirror 42 are arranged in parallel and are enclosed within the reflecting lens barrel 40. Reflector 4
0 is from 40a position to 40a as shown in the B direction arrow view.
d.

It can be rotated arbitrarily to the position 40e. 40a to 4Q
Even when the mirror is rotated by d and 4oe, the light is guided in the direction of 47e because the reflecting mirror 42 and the tilting mirror 43 are opposed to each other. Further, the reflecting mirror 419, the reflecting mirror 4z, and the erector mirror 43 can be moved by sliding the lens barrel 45 that supports them in the forward direction. Forward and backward movement is relative to the fixed position of the object to be inspected.
The range of Lb@L can be set arbitrarily. In response to the inclination of the object to be inspected, the tilting mirror can receive light from the observation mirror 5 at any angle within the range of α, α- from the fixed position.

FIG. 4 shows the optical path from the observation mirror 5 when the object to be inspected is tilted. When the object to be inspected is perpendicular to the periscope installed horizontally, the images of the object to be inspected are 47a and 47b.

47c, 47d, and 47e, and the light 52e passes through the scope lens barrel and is guided to the eyepiece 13. However, when the inspection object is tilted βb as shown at 55A, if the tilting mirror angle 43 is the same as when the inspection object is not tilted, the image from the observation mirror 5 is 52a
, 52b, 52c, 52d.

52f and the optical axis f is the horizontal axis of the periscope lens barrel 47e
Therefore, the necessary image cannot be obtained by the eyepiece lens 13. In this case, when the tilting mirror is tilted up and down so that the rotation angle αb=βb, the optical axis becomes 52f.
The horizontal axis of the periscope barrel changes from 4 to 526.
7e, and a desired image can be obtained on the eyepiece lens 13.

In FIG. 5, reflecting mirror 419 reflecting mirror 42. The mechanism for moving the tilting mirror 43 back and forth is shown. As is clear from FIG. 5A, the periscope tip rotating reflecting lens barrel 40 and the elevating lens barrel 48 are integrally connected to the lens barrel 45, and the lens barrel 45 is supported and a plurality of bearings 49 are provided in the axial direction of the lens barrel. , the lens barrel 45 is movable. @50 is supported by a shaft support 51 fixed to the outer cylinder of the periscope 1, and by this shaft 50,
A bearing 49 provided on the lens barrel 45 is supported.

FIG. 5B shows a mechanism for moving the lens barrel 45 in the front-back direction. When the handle 67 mounted near the eyepiece on the operation room side is rotated, the shaft 66, gears 6.5, 66,
Axis 63. Gears 62, 61. Shaft 60, sprocket 57.
59. The chain 58 converts the lens barrel 45 into linear movement. The linear movement of the lens barrel 45 is achieved by fixing the lens barrel drive piece 56 attached to the chain 58 to the lens barrel 45 and moving the sprocket 5.
7 is fixed inside the periscope outer cylinder 1.

FIG. 6 shows the rotation mechanism of the periscope tip rotation reflecting lens barrel 40. As shown in FIG. This is a mechanism for rotating the reflecting lens barrel around a bearing 44 shown in FIG.

When the handle provided near the eyepiece on the operation room side is rotated, the shaft 78. Gear 77, 76, shaft 75, gear 74
,73. Axis 72. Gear 71, 70° shaft 70a, gear 69
The motion is transmitted through the periscope tip and rotationally drives a gear 69 that is integrally attached to the rotating reflective lens barrel 40 at the tip end of the periscope.

FIG. 7 shows the elevating mechanism of the elevating mirror 43. A handle 92 provided near the eyepiece on the operation room side
When rotating the shaft 91. Warm 90. wheel 8
9. Axis 88. Worm 87° Wheel 86. Axis 85. Gears 84, 83. The movement is transmitted by the shaft 82° gears 80, 81, and the tilting mirror 43 tilts up and down.

Due to the front-rear, left-right, and tilting mechanisms of the reflector at the tip of the periscope described above in Figures 3 to 7, the long cylindrical device that is the object to be inspected is eccentrically tilted from the normal position, and the inside is tilted. Even if the optical axis of the inserted reflecting mirror device observation mirror 5 is shifted, the periscope tip reflecting mirror can sufficiently receive light from the object to be inspected. In addition, all operations of the periscope tip reflector are performed by mechanical components such as gears and shafts, so it is highly reliable.

FIG. 8 shows the elevating mechanism of the reflecting mirror device.

The reflecting mirror device 4 includes an elevating device 9 and a reflecting mirror device section 2. Electrical cable processing section 3
．． It is composed of a lifting wire 18.

In order to secure an optical path between the observation mirror 5 of the reflecting mirror holder and the periscope distal end reflecting mirror, the lifting device part is hollow in the center so that its cross section has an area centered on the optical axis, and the lifting wire is As two wires eccentric from the center, the electric cable processing section 3 is also formed into a coiled cable so that the center part is a space.

Further, a hanging tool 119 for lifting and moving the entire reflecting mirror device is attached to the lifting device section. When this hanging tool 119 is not used, it is rotated about the pin 119a as a fulcrum so as not to interfere with the optical path, as shown in FIG. 8B. The reflecting mirror unit 2 moves up and down while being centered by a spring-loaded centering ring 27. When descending, the electric cable handling section moves to the cable holder 93 as shown in FIG.
It extends with the connection JAc94 as a fulcrum, but has a structure with a space in the center. Even if the electric cable processing section expands or contracts, the cable is safely held in the holder 93 by the cable presser 95.

・Figure 10 shows the structure of the connector. A guide cover 97 assembled integrally with a female connector 99 is attached to the connector terminal block 26 shown in FIG. It is designed to be inserted at the same time.

By attaching a guide bin 98 to the male connector 96 and inserting the groove provided in the guide cover 97 of the female connector as a guide, the phases can be automatically aligned. In this way, since electric cables can be connected remotely, a multifunctional reflector device combining a control motor, lighting, etc. can be realized.

FIG. 11 is a diagram showing the reflecting mirror section 2. FIG. The reflecting mirror section 2 is provided with an illumination 28. In order to rotate the built-in observation mirror 5 around the optical axis of the reflecting mirror at the tip of the periscope, a hollow shaft 29 supported by a bearing 35 is driven to rotate by a motor 34 and a gear train 36.

The observation mirror 5 is moved by a tilting motor 31 to a system screw toothed shaft 32. It is rotated up and down via the gear 33. motor 3
1. The electric cable for the lighting 28 is arranged in a spiral coil shape on the outer diameter side of the hollow shaft 29 via the terminal block 37. Observation mirror 51 illumination 28. The terminal block 37 rotates integrally with the hollow shaft 29, and the electric cable is formed into a spiral coil. Even if one end 30a of the electric cable is connected to the fixed end, there is a space provided in the spiral coiled cable 30 for winding and unwinding corresponding to rotation, so that no excessive force is applied to the fixed end 30a of the electric cable. The hollow shaft 29 can be rotated without applying any force. 1st
As shown in FIG. 1, a hollow shaft 29. The drive motor 34 of the hollow shaft 29 uses a spiral coiled electric cable 30.
By arranging them eccentrically, you can secure an intermediate space in the center.

FIG. 11C shows a cross section taken along line CC in FIG. 11A.

The illumination lamp 28 is provided with a reflecting plate 39 for condensing light in order to make the illumination effective.

The reflecting mirror device according to the embodiment of the present invention having the configuration and operation as described above can be moved up and down over a wide range by the lifting device, and can be inspected in various directions at the observation position by the rotating and elevating mechanisms.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

Since the periscope and reflector are only optically coupled, each device can be made very compact. In particular, the reflector device can be miniaturized so that each component can fit into an elongated cylindrical device with a small diameter. Because the periscope and reflector equipment can be installed in a short time, efficient inspections are possible. This effect is particularly great when there are a large number of long cylindrical objects. In addition, since the reflecting mirror device is equipped with a lifting device, even if the object to be inspected is very long, it is possible to accurately move the observation mirror to the part to be inspected. The time required to move the observation mirror can be reduced.

Further, even if there is an installation error in the object to be inspected, the movement strokes of the periscope in front and back, left and right, and up and down can be selected in accordance with the deviations, and light can be received from the observation mirror 5.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the inspection periscope reflector device according to the present invention, Fig. 2 shows another embodiment in which the reflector device is moved up and down by a crane, and Fig. 3 shows the tip of the periscope. Figure 4 shows the optical path from the observation mirror when the object to be inspected is tilted, Figure 5 shows the mechanism for moving the tip of the scope back and forth, and Figure 6 shows the rotation mechanism for the tip of the scope. , Fig. 7 is a diagram showing the elevating mechanism, Fig. 8 is a diagram showing the elevating mechanism of the reflecting mirror device, Fig. 9 is a diagram showing the electric cable processing section, Fig. 10 is a diagram showing the structure of the connector, and Fig. 11 is a diagram showing the structure of the connector. 12 shows a conventional mechanically coupled periscope reflector device, and FIG. 13 shows a conventional periscope reflector device using a telescopic tube. 1... Periscope, 2... Reflector device section, 3...
・Cable processing unit, 4... Reflector device, 5... Observation mirror, 6... Long cylindrical device, 7... Periscope tip reflector, 8... Electric cable, 9... Cable Penetration, 10... Control device section, 11... Control operation panel, 12... Monitor TV, 13... Eyepiece section, 14... Hot cell floor, 15... Radiation shielding wall, 15a. ...Radiation shielding glass window, 16...Hot cell, 17...Elevating device, 18...Wire for lifting 9, 19...Operation room, 20...TV camera for periscope, 21... Crane, 21a... Hook, 21b... Hanging tool, 22... Connector, 23.
・・Motor for lifting device part, 24 ・・Winding drum, 25
...Chain, 26...Connector terminal block, 27...
・Reflector device centering spring wheel, 28... Illumination lamp, 29... Hollow shaft, 30... Electric cable, 31... Observation mirror elevation motor, 32... Screw toothed shaft , 34... Motor, 36... Gear train, 37
...Cable terminal mounting base, 38...Hollow hole, 39.
...Reflector plate, 40...Periscope tip rotating reflector tube, 41.42...Reflector, 43...Elevating mirror, 44...
... bearing, 45 ... lens barrel, 46 ... protection tube, 47.
... Optical path, 48... Elevation mirror, 49... Bearing, 50.
... Axis, 51 ... Axis support, 52 ... Optical path, 53
... Center line of long cylindrical device, 54 ... Center line of inclined long cylinder device, 56 ... Lens barrel drive piece, 57 ... Sprocket, 58 ... Chain, 59 ... Sprocket, 67.79...handle, 91...handle, 9
2... Electric cable, 93... Cable holder, 9
4... Connection, 95... Cable holder, 96...
Male side connector, 97...Guide cover, 98...
Guide pin, 99...Female side connector, 100...
Holding part, 101... Lens barrel, 102... Observation mirror, 10
7...Periscope, 108...Telescopic tube, 110...Reflector or television camera.

Claims (1)

[Claims] 1. In a periscope reflector device for remote inspection consisting of a combination of a periscope and a reflector device, both the periscope and the reflector device are arranged so that the distances in the horizontal and vertical directions between the periscope and the reflector device can be changed independently. A periscope reflector device for inspection, characterized by optically coupling the two. 2. In claim 1, in order to inspect a vertical inspection object installed in a shielded room that is shielded by shielding side walls, ceiling walls, and floor walls and is in an environment where humans cannot enter, The periscope is inserted through a small opening in the shielding wall, while the reflector device, which is brought in through another small opening, is suspended inside the shielding room and placed inside the object to be inspected. A periscope reflector device for inspection characterized by being used in combination. 3. A periscope reflecting mirror device for inspection according to claim 2, characterized in that the reflecting mirror device includes an elevating mechanism that moves the reflecting mirror section up and down within the object to be inspected. 4. A periscope reflecting mirror device for inspection according to claim 2, characterized in that the reflecting mirror portion of the reflecting mirror device is moved up and down within the object to be inspected by an overhead crane. 5. In any one of the above claims, a mechanism is provided at the tip of the periscope to tilt the reflector back and forth, left and right, and when the object to be inspected is installed obliquely, A periscope reflector device for inspection, characterized in that it receives emitted light. 6. In claim 3, the reflecting mirror device includes an electric cable processing section for driving and controlling the observation mirror of the reflecting mirror section, and a wire for raising and lowering the reflecting mirror section, and a wire for raising and lowering the reflecting mirror section; An inspection characterized in that the elevating mechanism is hollow, the elevating wire consists of two or more wires eccentric from the hollow part, and the electrical cable processing section is coiled so as not to block the exit optical path to the periscope. Periscope reflector device for use. 7. An inspection periscope reflector device according to any one of the above claims, characterized in that the reflector device control cable is provided with a connector for remote connection at the location where the reflector device is installed. 8. In any one of the above claims, the reflecting mirror section is provided with an illumination, the observation mirror rotates and looks up and down about the optical axis to the reflecting mirror at the tip of the periscope, and the observation mirror and the illumination are rotated. A periscope reflector device for inspection, characterized in that a motor for raising and lowering, an electric cable, a shaft, a bearing, etc. are arranged so as not to block an optical path between an observation mirror and a periscope tip reflector.