JP2021015736A - Connector imaging device and imaging method, and connector inspection jig and inspection method - Google Patents

Abstract

To evaluate the soundness of a connector with high accuracy and enhance the workability of an inspection work in connector imaging device and imaging method, and connector inspection jig and inspection method.SOLUTION: A connector imaging device includes a casing in which a first end plate is fixed to one end portion in an axial direction of an outer cylinder and a second end plate is fixed to the other end portion, a connector mounting opening portion which is provided on the second end plate and in which the tip portion of the connector is fitted, a camera which is arranged inside the casing so as to face the connector mounting opening portion, a lighting device which is arranged inside the casing so as to face the connector mounting opening portion, and an axial direction positioning portion which is provided in the connector mounting opening portion to perform positioning in the central axial direction of the connector.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a connector photographing device and a connector photographing method for photographing a connector for electrically connecting various devices, and a connector inspection jig and a connector inspection method for inspecting a connector.

For example, a pressurized water reactor (PWR) uses light water as a reactor coolant and a neutron reducer to make high-temperature and high-pressure water that does not boil throughout the core, and sends this high-temperature and high-pressure water to a steam generator. It produces steam by heat exchange. In such a nuclear reactor, in order to ensure sufficient safety and reliability, it is necessary to regularly inspect the structures constituting the nuclear reactor. Then, when a defect is found in the periodic inspection, the defective member is replaced or the necessary part is repaired.

In the periodic inspection of the reactor, it is necessary to stop the operation of the reactor, remove the lid from the reactor body, and take out the internal structure. In a nuclear reactor, a control rod drive device for driving a control rod inserted into a core (fuel) is provided on the upper part of a lid. The control rod drive is electrically connected to the intermediate panel installed on the operation floor of the reactor building via a cable. Since the connector is connected to the cable by inserting it into the intermediate panel, the connector is removed from the intermediate panel for periodic inspection before removing the lid from the reactor body.

For the cable, the pin connector of the connector is inserted into the connection part of the intermediate panel. When the connector is pulled out from the intermediate panel, the operator visually inspects the defect of the pin connector in the connector.

In addition, in order to confirm the identification mark of the reactor fuel assembly in water, the identification mark is photographed by a camera, for example, the one described in the following cited document 1.

Japanese Unexamined Patent Publication No. 2004-101315

Conventionally, the inspection work performed by the operator visually confirms the defect of the pin connector in the connector extracted from the intermediate panel, and records the date and time, the connector (cable) number, and the presence or absence of the defect. The intermediate panel is installed on the upper part of the reactor lid of the reactor building, and the operator carries out the inspection work of the connector on the upper part of the reactor lid. On the operation floor, sufficient brightness is not secured for visual inspection, and it is not easy to visually confirm the defect of the pin connector.

The present disclosure solves the above-mentioned problems, and provides a connector imaging device and imaging method, and a connector inspection jig and inspection method for evaluating the soundness of a connector with high accuracy and improving the workability of inspection work. The purpose is to do.

The connector photographing apparatus of the present disclosure for achieving the above object includes a casing in which the first end plate is fixed to one end in the axial direction of the outer cylinder and the second end plate is fixed to the other end, and the first end plate. A connector mounting opening provided on the two end plates and fitted with the tip of the connector, a camera arranged inside the casing facing the connector mounting opening, and the connector mounting opening inside the casing. A lighting device arranged so as to face the portion and an axial positioning portion provided in the connector mounting opening for positioning the connector in the axial direction are provided.

The connector photographing method of the present disclosure includes a step of fitting the tip of the connector into the connector mounting opening of the connector photographing device and a step of positioning the tip of the connector with respect to the connector photographing device in the axial direction. A step of irradiating the tip of the connector fitted in the connector mounting opening with the lighting device with light, and a step of photographing the tip of the connector fitted in the connector mounting opening with the camera. Have.

The connector inspection jig of the present disclosure is a connector inspection jig in which a pin connector is arranged inside a ring-shaped main body, and the pin connector can be inserted while being fitted inside the operation unit and the main body. It is provided with an inspection member having an inspection hole, and a connecting member for connecting the operation unit and the inspection member.

The connector inspection method of the present disclosure is described in accordance with a step of grasping the operation portion of the connector inspection jig and fitting the inspection member into the main body, and a state in which the pin connector is inserted into the inspection hole. It has a step of determining a defect of the pin connector.

According to the connector photographing apparatus and the photographing method and the connector inspection jig and the inspection method of the present disclosure, the soundness of the connector can be evaluated with high accuracy, and the workability of the inspection work can be improved.

FIG. 1 is a configuration diagram showing a connector photographing system. FIG. 2 is a front view showing a part of the connector photographing apparatus of the present embodiment in cross section. FIG. 3 is a sectional view taken along line III-III of FIG. 2 showing the inside of the connector photographing apparatus. FIG. 4 is a cross-sectional view showing a connecting portion between the connector photographing apparatus and the connector. FIG. 5 is a VV cross-sectional view of FIG. 4 showing a connection portion between the connector photographing apparatus and the connector. FIG. 6 is a plan view showing the position adjusting device of the camera. FIG. 7 is a front view showing the position adjusting device of the camera. FIG. 8 is a front view showing a modified example of the camera position adjusting device. FIG. 9 is a front view showing the connector inspection jig. FIG. 10 is a cross-sectional view for explaining an inspection method using a connector inspection jig. FIG. 11 is a flowchart for explaining a connector inspection method. FIG. 12 is a vertical cross-sectional view showing a pressurized water reactor. FIG. 13 is a schematic view showing the arrangement of pressurized water reactors in the reactor.

Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be noted that the present disclosure is not limited by this embodiment, and when there are a plurality of embodiments, those which are configured by combining each embodiment are also included. Further, the components in the embodiment include those that can be easily assumed by those skilled in the art, those that are substantially the same, that is, those in a so-called equal range.

[Pressurized Water Reactor]
FIG. 12 is a vertical cross-sectional view showing a pressurized water reactor.

Although not shown, a nuclear power plant has a reactor and a steam generator arranged in a reactor containment vessel, and a steam turbine power generation facility. The reactor of this embodiment is a pressurized water reactor.

As shown in FIG. 12, in the pressurized water reactor 10, the reactor vessel 11 is provided by the reactor vessel main body 12 and the reactor vessel lid 13 mounted on the upper portion thereof so that the internal structure can be inserted inside. The reactor vessel lid 13 is operably fixed to the reactor vessel body 12 by a plurality of stud bolts 14 and nuts 15.

The reactor vessel body 12 has a cylindrical shape with an open upper portion and a hemispherical lower portion closed, and an inlet nozzle 16 for supplying light water as a primary coolant to the upper portion and an outlet nozzle 17 for discharging light water. Is formed. The core tank 18 is arranged inside the reactor vessel body 12, and the upper portion is supported by the inner wall surface of the reactor vessel body 12. The upper core support plate 19 is arranged inside the reactor vessel main body 12, and the upper portion is supported by the upper portion of the core tank 18. The upper core plate 20 is suspended and supported by a plurality of core support rods 21 on the upper core support plate 19.

The lower core support plate 22 is supported downward in the core tank 18, and the outer peripheral portion of the lower core support plate 22 is positioned and supported on the inner wall surface of the reactor vessel main body 12 by the positioning member 23. The lower core plate 24 is supported at the lower part of the core tank 18. The core 25 is configured by arranging a large number of fuel assemblies 26, and a large number of control rods 27 are arranged inside, and the control rods 27 can be inserted into the fuel assembly 26. A large number of control rod cluster guide pipes 28 are fixed to the upper core support plate 19, and control rods 27 can be inserted therein. The reactor vessel lid 13 has a hemispherical shape, a control rod drive device 29 is arranged, a plurality of control rod cluster drive shafts 30 are inserted into the control rod cluster guide pipe 28, and the control rod 27 is connected to the lower end portion. To. The control rod drive device 29 controls the reactor output by inserting and removing each control rod 27 from the core 25.

[Arrangement of pressurized water reactors]
FIG. 13 is a schematic view showing the arrangement of pressurized water reactors in the reactor.

As shown in FIG. 13, the reactor building (not shown) is provided with an operation floor 101 and a cavity 102 that is dug downward from the operation floor 101 and can store cooling water. The pressurized water reactor 10 is suspended and supported in the cavity 102. The pressurized water reactor 10 is configured by accommodating an internal structure such as a core 25 (fuel assembly 26) inside the reactor vessel 11. Further, in the pressurized water reactor 10, a control rod drive device 29 is provided above the reactor vessel 11, and the control rod drive device 29 inserts a plurality of control rods 27 into the core 25.

The intermediate panel 103 is installed above the lid of the pressurized water reactor 10 and is connected to the control rod drive device 29 by a plurality of cables 104. A connector 105 is connected to one end of the cable 104 in the longitudinal direction. The cable 104 is detachably connected to the intermediate panel 103 via the connector 105.

[Connector shooting system]
FIG. 1 is a configuration diagram showing a connector photographing system.

As shown in FIG. 1, the connector photographing system 40 includes a connector photographing device 41, a control unit 42, an operation unit 43, a display unit 44, a recording unit 45, and a power supply unit 46. The connector photographing device 41 is held by an operator, and the control unit 42 is connected to the connector photographing device 41, the operation unit 43, the display unit 44, the recording unit 45, and the power supply unit 46, and covers the lid of the pressurized water reactor 10. It is located on the operation floor near the intermediate panel 103 at the top.

When the operator photographs the connector 105 using the connector photographing device 41, the photographed image is recorded in the recording unit 45 via the control unit 42. The operator inputs the date and time and the information (cable number, etc.) of the connector 105 taken by using the operation unit 43. Further, the operator can display the captured image of the connector 105 recorded on the recording unit 45 on the display unit 44, and inspect and evaluate the presence or absence of a defect of the connector 105 based on the captured image.

[Connector photography device]
FIG. 2 is a front view showing a part of the connector photographing device of the present embodiment in cross section, FIG. 3 is a sectional view taken along line III-III of FIG. 2 showing the inside of the connector photographing device, and FIG. 4 is a connector photographing device and a connector. FIG. 5 is a cross-sectional view showing a connection portion between the connector and the connector, and FIG. 5 is a VV cross-sectional view of FIG.

As shown in FIGS. 2 to 5, the connector 105 is configured by rotatably providing a cylindrical fastening portion 112 on the outside of the cylindrical main body 111. In this case, the main body 111 and the fastening portion 112 are located concentrically with the central axis O1 of the connector 105. Then, the main body 111 projects from the fastening portion 112 toward the tip end portion in the axial direction by a predetermined length. In the main body 111, a cable 104 is connected to one end in the axial direction, a large number of pin connectors 113 are attached to the other end at predetermined intervals, and the cable 104 is connected to the pin connector 113 inside the main body 111.

The connector photographing device 41 includes a casing 51, a connector mounting opening 52, cameras 53, 54, 55, 56, a lighting device 57, and an axial positioning unit 58. In the casing 51, a disk-shaped first end plate 62 is fixed to one end in the axial direction of the cylindrical outer cylinder 61, and a disk-shaped second end plate 63 is fixed to the other end in the axial direction. It is fixed and configured. The outer cylinder 61 has a first outer cylinder 61a and a second outer cylinder 61b, and the first outer cylinder 61a and the second outer cylinder 61b are arranged along the axial direction. A support member 64 is arranged on the inner peripheral portion of the outer cylinder 61. The support member 64 is provided with a ring-shaped protrusion 64b on the outer peripheral portion of the cylindrical main body 64a. In the support member 64, the protrusion 64b is sandwiched between the end of the first outer cylinder 61a and the end of the second outer cylinder 61b, and the outer peripheral portion is the inner peripheral portion of the first outer cylinder 61a and the second outer cylinder 61b. It is fixed by bolts (not shown) in close contact with.

The outer cylinder 61 is fixed by a bolt (not shown) with the first end plate 62 fitted to one end of the first outer cylinder 61a in the axial direction, and is fixed to the other end of the second outer cylinder 61b in the axial direction. The second end plate 63 is fixed by a bolt (not shown) in a fitted state. The first end plate 62 and the second end plate 63 are arranged in parallel. The casing 51 is provided with a connector mounting opening 52 in the second end plate 63. The connector mounting opening 52 is formed by opening in the second end plate 63 so as to be located at the central axis O2 of the casing 51. The inner diameter of the connector mounting opening 52 is slightly larger than the outer diameter of the main body 111 of the connector 105, and the tip of the main body 111 of the connector 105 can be fitted into the connector mounting opening 52.

The cameras 53, 54, 55, and 56 are arranged inside the casing 51 so as to face the connector mounting opening 52 in the axial direction. The cameras 53, 54, 55, 56 have a central camera 53 provided in the central portion of the casing 51 and side cameras 54, 55, 56 provided in the inner peripheral portion of the casing 51. A plurality of side cameras 54, 55, 56 (three in the present embodiment) are provided around the central camera 53 at predetermined intervals in the circumferential direction.

That is, the support member 64 is integrally provided with a ring-shaped first support plate 64c on the second end plate 63 side of the main body 64a. The first support plate 64c is parallel to the second end plate 63, and an opening 64d is formed in the central portion. The first mounting bracket 65a is fixed to the first support plate 64c so as to be orthogonal to the first support plate 64c, and the tip portion extends toward the central axis O2. The central camera 53 is mounted on the tip of the first mounting bracket 65a, and its optical axis coincides with the central axis O2. Further, in the first support plate 64c, three second mounting brackets 65b, 65c, 65d are fixed so as to be orthogonal to the first support plate 64c, and the tip portion extends to the central axis O2 side. The second mounting brackets 65b, 65c, 65d are arranged at predetermined intervals (preferably at equal intervals) in the circumferential direction so as not to overlap the first mounting bracket 65a, and the side cameras 54, 55, 56 are second. It is mounted on the tips of the mounting brackets 65b, 65c, 65d, the optical axis is inclined with respect to the central axis O2, and intersects the central axis O2 at the connector mounting opening 52.

Therefore, the cameras 53, 54, 55, and 56 can take a picture over the entire area of the main body 111 of the connector 105 fitted in the connector mounting opening 52. Further, the cameras 53, 54, 55, and 56 are adjusted so that the focus is on the main body 111 (pin connector 113) of the connector 105 fitted in the connector mounting opening 52.

The lighting device 57 is arranged inside the casing 51 so as to face the connector mounting opening 52. The cameras 53, 54, 55, 56 are arranged between the lighting device 57 and the connector mounting opening 52. That is, the lighting device 57 is arranged on the side opposite to the connector mounting opening 52 with respect to the cameras 53, 54, 55, 56. The support member 64 is integrally provided with a ring-shaped second support plate 64e on the first end plate 62 side of the main body 64a. The second support plate 64e is parallel to the first end plate 62, and an opening 64f is formed in the central portion. The lighting device 57 is fixed to the lower part of the second support plate 64e and is located concentrically with the central axis O2.

The axial positioning portion 58 is provided in the connector mounting opening 52, and positions the casing 51 in the central axis O1 direction of the connector 105. The tip of the main body 111 of the connector 105 projects from the tip of the fastening portion 112 toward the tip in the central axis O1 direction. Therefore, when the tip of the main body 111 of the connector 105 is fitted into the connector mounting opening 52, the tip of the fastening portion 112 comes into contact with the outer surface portion 63a of the second end plate 63. That is, the second end plate 63 functions as the axial positioning portion 58 of the connector 105.

Further, the connector photographing device 41 has a circumferential positioning unit 59. The circumferential positioning portion 59 is provided in the connector mounting opening 52, and positions the casing 51 in the circumferential direction centered on the central axis O1 of the connector 105. The connector 105 has a convex portion 111a formed on the outer peripheral portion of the main body 111, and the second end plate 63 has a locking recess 52a formed on the connector mounting opening 52. Therefore, when the tip of the main body 111 of the connector 105 fits into the connector mounting opening 52, the convex portion 111a locks into the locking recess 52a. That is, the locking recess 52a of the connector mounting opening 52 functions as the circumferential positioning portion 59.

A concave portion is formed on the outer peripheral portion of the main body 111 of the connector 105, a locking convex portion is formed on the connector mounting opening 52 of the second end plate 63, and the tip end portion of the main body 111 of the connector 105 is the connector mounting opening 52. The recess may be configured to lock on the locking protrusion when fitted to. That is, the locking convex portion of the connector mounting opening 52 may function as a circumferential positioning portion.

Further, in the casing 51, the handle portion 66 is fixed to the first end plate 62. The handle portion 66 has a U-shape, and the operator can hold the connector photographing device 41 by the handle portion 66.

[Camera position adjustment device]
The focus of the cameras 53, 54, 55, 56 is on the main body 111 (pin connector 113) of the connector 105 fitted in the connector mounting opening 52, or the shooting range of the cameras 53, 54, 55, 56 is the connector. The position may be adjustable so as to cover the entire area of the main body 111 (pin connector 113) of 105. FIG. 6 is a plan view showing the position adjusting device of the camera, and FIG. 7 is a front view showing the position adjusting device of the camera.

As shown in FIGS. 6 and 7, a first adjusting device 71 for adjusting the position of the central camera 53 in the central axis O2 direction of the casing 51 (outer cylinder 61) is provided. Further, a second adjusting device 72 for adjusting the position of the central camera 53 in a direction orthogonal to the central axis O2 direction of the casing 51 (outer cylinder 61) is provided.

The support member 64 has a first support plate 64c which is fixed to the outer cylinder 61 of the casing 51 and has a ring shape. The first support plate 64c is fixed by bolts 73 having a plurality of (two in this embodiment) base ends of the first mounting bracket 65a. The first mounting bracket 65a has a plurality of (two in this embodiment) mounting holes 74 formed at the base end portion, and the bolt 73 penetrates the mounting holes 74 into the screw holes 75 of the first support plate 64c. Screw in. Here, the inner diameter of the mounting hole 74 is larger than the outer diameter of the bolt 73. The central camera 53 is fixed to the tip of the first mounting bracket 65a by a plurality of (two in this embodiment) bolts 76 via the bracket 77. The central camera 53 is integrally fixed to the bracket 77. A plurality of (two in this embodiment) mounting holes 78 are formed in the bracket 77, and the bolt 76 penetrates the mounting holes 78 and is screwed into the screw holes 79 of the first mounting bracket 65a. Here, the inner diameter of the mounting hole 78 is larger than the outer diameter of the bolt 76.

Therefore, the bolt 76 is loosened, and the central camera 53 is moved together with the bracket 77 in the direction of the central axis O2 of the casing 51 (outer cylinder 61) by the difference between the inner diameter of the mounting hole 78 and the outer diameter of the bolt 76. The position of the central camera 53 can be adjusted along the central axis O2 direction. Here, the first adjusting device 71 is composed of bolts 76 and mounting holes 78. Further, by loosening the bolt 73 and moving the first mounting bracket 65a in the circumferential direction or the radial direction of the casing 51 (outer cylinder 61) by the difference between the inner diameter of the mounting hole 74 and the outer diameter of the bolt 73, the center is formed. The position of the unit camera 53 can be adjusted along a direction orthogonal to the central axis O2 direction. Here, the second adjusting device 72 is composed of a bolt 73 and a mounting hole 74.

[Modification example of camera position adjustment device]
FIG. 8 is a front view showing a modified example of the camera position adjusting device.

As shown in FIG. 8, a first adjusting device 81 for adjusting the position of the central camera 53 in the central axis O2 direction of the casing 51 (outer cylinder 61) is provided. Further, a second adjusting device 82 for adjusting the position of the central camera 53 in a direction orthogonal to the central axis O2 direction of the casing 51 (outer cylinder 61) is provided.

The support member 64 has a first support plate 64c which is fixed to the outer cylinder 61 of the casing 51 and has a ring shape. In the first support plate 64c, the base end portions of the first mounting bracket 83 are fixed by a plurality of (two in this embodiment) bolts 84. A disk-shaped support base 85 is fixed to the tip of the first mounting bracket 83, and a disk-shaped mounting base 86 is arranged on the support base 85. A plurality of (four in this embodiment) adjusting bolts 87 are screwed into the support base 85 from the outside, and the tip portion is locked to the outer peripheral portion of the mounting base 86. In the mounting base 86, the screw shaft 88 penetrates along the central axis O2 direction, the adjusting nut 89 is screwed into the upper part, and the central camera 53 is fixed to the lower part.

Therefore, by rotating the adjusting nut 89 with respect to the screw shaft 88 and moving the screw shaft 88 in the direction of the central shaft O2 of the casing 51 (outer cylinder 61), the position of the central camera 53 integrated with the screw shaft 88 can be determined. It can be adjusted along the central axis O2 direction. Here, the first adjusting device 81 is a screw shaft 88 and an adjusting nut 89. Further, by extending one adjusting bolt 87 and contracting the other adjusting bolt 87, the mounting base 86 is moved in the radial direction of the casing 51 (outer cylinder 61), and the position of the central camera 53 is moved in the central axis O2 direction. It can be adjusted along the orthogonal directions. Here, the second adjusting device 82 is composed of a support base 85, a mounting base 86, and an adjusting bolt 87.

In the above-described embodiment, the adjusting devices 71, 72, 81, 82 for adjusting the position of the central camera 53 have been described, but they may be applied to the side cameras 54, 55, 56.

[Connector inspection jig]
FIG. 9 is a front view showing a connector inspection jig, and FIG. 10 is a cross-sectional view for explaining an inspection method using the connector inspection jig.

As shown in FIG. 9, the connector inspection jig 90 inspects defects of a plurality of pin connectors 113 arranged inside the main body 111 of the connector 105. The connector inspection jig 90 includes an operation unit 91, an inspection member 92, and a connecting member 93.

The operation unit 91 is gripped by an operator or a robot. The inspection member 92 has a disk shape and fits inside the main body 111 from the tip end portion of the connector 105. The outer diameter of the inspection member 92 is set to be slightly smaller than the inner diameter of the main body 111. The inspection member 92 is provided with a plurality of inspection holes 94 into which a plurality of pin connectors 113 can be inserted. The plurality of inspection holes 94 are formed through the inspection member 92, and their positions are set so that the plurality of pin connectors 113 can be inserted, and the inner diameter is set to a dimension slightly larger than the outer diameter of the pin connector 113. To. The connecting member 93 is a rod member, and a plurality of connecting members 93 are provided to connect the operation unit 91 and the inspection member 92.

Therefore, as shown in FIGS. 9 and 10, when the operator (robot) grasps the operation unit 91 of the connector inspection jig 90 and inserts the inspection member 92 into the main body 111 of the connector 105, the inspection member 92 becomes a connector. It fits inside the main body 111 of 105. At this time, if there is no problem with the plurality of pin connectors 113, that is, if the pin connectors 113 are not bent, the plurality of pin connectors 113 are inserted into the plurality of inspection holes 94. On the other hand, if there is a defect in the plurality of pin connectors 113, that is, if even one pin connector 113 is bent, the bent pin connector 113 is not inserted into the inspection hole 94, and the amount of the inspection member 92 inserted into the main body 111 is Is reduced.

[Connector shooting method and inspection method]
FIG. 11 is a flowchart for explaining a connector inspection method.

The connector imaging method of the present embodiment includes a step of fitting the tip of the connector 105 into the connector mounting opening 52 of the connector imaging device 41 and the tip of the connector 105 in the central axis O1 direction with respect to the connector imaging device 41. The step of performing positioning, the step of irradiating the tip of the connector 105 fitted in the connector mounting opening 52 by the lighting device 57 with light, and the step of fitting the connector mounting opening 52 by the cameras 53, 54, 55, 56. It includes a step of photographing the tip of the connector 105.

The connector inspection method of the present embodiment includes a step of grasping the operation portion 91 of the connector inspection jig 90 and fitting the inspection member 92 inside the main body 111 of the connector 105, and a state in which the pin connector 113 is inserted into the inspection hole 94. It has a step of determining a defect of the pin connector 113 according to the above.

Hereinafter, a specific description will be given. As shown in FIGS. 11 and 12, in step S11, the operator removes the connector 105 of the cable 104 connected to the control rod drive device 29 from the intermediate panel 103 on the operation floor 101. In step A12, the operator visually inspects the pin connector 113 (see FIG. 5) of the connector 105 for a defect that it is not bent. In step S13, the cap is attached to the connection portion of the intermediate panel 103 from which the connector 105 has been removed.

As shown in FIGS. 2 and 11, in step S14, the operator attaches the removed connector 105 to the connector photographing device 41. At this time, as shown in FIGS. 4 and 5, when the tip of the connector 105 is inserted into the second end plate 63 side of the connector photographing device 41, the tip of the main body 111 is fitted into the connector mounting opening 52. When the tip end portion of the fastening portion 112 comes into contact with the outer surface portion 63a, the central axes O1 and O2 are aligned, and the connector 105 is positioned in the central axis O1 direction with respect to the connector photographing apparatus 41. Further, when the tip end portion of the main body 111 is fitted into the connector mounting opening 52, the connector 105 is rotated in the circumferential direction so that the convex portion 111a of the main body 111 and the locking recess 52a of the connector mounting opening 52 match. Move it. Then, the convex portion 111a of the main body 111 is locked in the locking concave portion 52a of the connector mounting opening 52, so that the connector imaging device 41 is positioned in the circumferential direction centered on the central axis O1 of the connector 105. ..

When the connector 105 is attached to the connector photographing device 41 at an appropriate position, as shown in FIGS. 1 and 11, the operator operates the operation unit 43 in step S15, and the cameras 53, 54, The connector 105 is photographed by 55, 56 (see FIG. 3). In step S16, the operator operates the operation unit 43 and inputs the shooting date and time and the information (cable number, etc.) of the connector 105 shot by the cameras 53, 54, 55, 56. The images taken by the cameras 53, 54, 55, 56, the input shooting date and time, and the information (cable number, etc.) of the connector 105 are stored in the recording unit 45. Then, in step S17, a cap is attached to the connector 105, and in step S18, the cables 104 to which the photographed connector 105 is connected are put together.

In step S19, it is confirmed whether or not the photographing of all the connectors 105 is completed, and if the photographing of all the connectors 105 is not completed (No), the process returns to step S11 and the process is repeated. On the other hand, when the photographing of all the connectors 105 is completed (Yes), the photographed connectors 105 are inspected in step S20. As shown in FIG. 1, the operator calls the images of all the connectors 105 stored in the recording unit 45 by the operation unit 43, and displays them on the display unit 44 in order. The images of the connector 105 are one image of the central camera 53 in which the plurality of pin connectors 113 are photographed from the front, and three images of the side cameras 54, 55, 56 in which the plurality of pin connectors 113 are photographed from an angle. .. Therefore, the operator can easily visually detect defects such as bending and crushing of the pin connector 113. Further, the recording unit 45 stores a model image of the normal connector 105 without any defects of the pin connector 113. Therefore, the operator can easily find a defect in the connector 105 by comparing the captured image of the connector 105 with the model image. Here, when the operator finds a defect in the pin connector 113, the operation unit 43 inputs, for example, "replacement required" in the field of the connector number where the defect is found.

On the other hand, as shown in FIG. 13, when the connector 105 of the cable 104 removed from the intermediate panel 103 is reattached to the intermediate panel 103, a plurality of connectors inspection jigs 90 are used as shown in FIGS. 9 and 10. Re-inspect the pin connector 113 for defects. That is, the operator grips the operation portion 91 of the connector inspection jig 90, inserts the inspection member 92 into the main body 111 of the connector 105, and fits the inspection member 92. At this time, if the plurality of pin connectors 113 are inserted into the plurality of inspection holes 94 of the inspection member 92, it can be seen that the pin connector 113 is not bent and is normal. On the other hand, if even one of the plurality of pin connectors 113 is not inserted into the plurality of inspection holes 94 of the inspection member 92, the amount of the inspection member 92 inserted into the main body 111 is small, and some of the pin connectors 113 are bent. It turns out that there is a problem. In this case, it is necessary to replace the pin connector 113 or the connector 105.

[Action and effect of this embodiment]
The connector photographing apparatus 41 according to the first aspect includes a casing 51 in which the first end plate 62 is fixed to one end of the outer cylinder 61 in the central axis O2 direction and the second end plate 63 is fixed to the other end. The connector mounting opening 52 provided on the second end plate 63 and to which the tip of the connector 105 fits, and the cameras 53, 54, 55, 56 arranged to face the connector mounting opening 52 inside the casing 51. The lighting device 57, which is arranged inside the casing 51 so as to face the connector mounting opening 52, and the axial positioning portion 58, which is provided in the connector mounting opening 52 and performs positioning in the central axis O2 direction of the connector 105. To be equipped with.

In the connector photographing apparatus 41 according to the first aspect, the tip end portion of the connector 105 is fitted into the connector mounting opening 52 of the casing 51, and at this time, the axial positioning portion 58 is used in the direction of the central axis O2 of the connector 105 with respect to the casing. Perform positioning. In this state, the lighting device 57 irradiates the tip of the connector 105 with light, and the cameras 53, 54, 55, and 56 photograph the tip of the connector 105. As a result, a photographed image of the tip of the connector 105 can be acquired, and a defect of the connector 105 can be easily found from the photographed image of the connector 105. As a result, the soundness of the connector 105 can be evaluated with high accuracy, and the workability of the inspection work can be improved.

The connector photographing device 41 according to the second aspect is the connector photographing device 41 according to the first aspect, and the cameras 53, 54, 55, 56 include a central camera 53 provided at the center of the casing 51 and a central camera 53. It has side cameras 54, 55, 56 provided on the inner peripheral portion of the casing 51. As a result, it is possible to acquire captured images of a plurality of connectors taken from a plurality of different angles, and it is possible to easily find a defect of the connector 105 from the plurality of captured images of the connector 105 with high accuracy.

The connector photographing device 41 according to the third aspect is the connector photographing device 41 according to the first aspect, and the side cameras 54, 55, 56, 57 are spaced around the central camera 53 in the circumferential direction at predetermined intervals. Multiple are provided with a space. As a result, a defect of the connector 105 is found by the image taken from the front of the connector 105 taken by the central camera 53 and a plurality of images taken from the diagonal of the connector 105 taken by the side cameras 54, 55, 56, 57. Therefore, the inspection accuracy of the connector 105 can be improved.

The connector photographing device 41 according to the fourth aspect is the connector photographing device 41 according to the first aspect, and the cameras 53, 54, 55, 56 are arranged between the lighting device 57 and the connector mounting opening 52. Will be done. As a result, the cameras 53, 54, 55, and 56 photograph the tip of the connector in front of the illuminating device 57 that irradiates the tip of the connector 105 with light, so that the entire region at the tip of the connector is captured. You can shoot.

The connector photographing device 41 according to the fifth aspect is the connector photographing device 41 according to the first aspect, and the connector 105 has a rotatable fastening portion 112 outside the tubular main body 111 and is a connector. The outer peripheral portion of the main body 111 is fitted to the mounting opening 52, and the tip end portion of the fastening portion 112 is in contact with the axial positioning portion 58. Thereby, the axial positioning of the connector 105 with respect to the casing can be easily performed only by fitting the connector 105 into the connector mounting opening 52 of the casing.

The connector photographing device 41 according to the sixth aspect is the connector photographing device 41 according to the first aspect, and includes a circumferential positioning unit 59 provided in the connector mounting opening 52 for positioning the connector 105 in the circumferential direction. Have. As a result, the connector 105 can be easily positioned with respect to the casing in the circumferential direction, and the captured image of the tip portion of the connector 105 can be captured with high accuracy.

The connector photographing device 41 according to the seventh aspect is the connector photographing device 41 according to the first aspect, the connector 105 has a convex portion 111a on the outer peripheral portion, and the circumferential positioning portion 59 has a convex portion 111a. Has a locking recess 52a to which the As a result, the connector 105 can be easily positioned in the circumferential direction with respect to the casing simply by locking the convex portion 111a of the connector 105 to the locking concave portion 52a of the connector mounting opening 52.

The connector photographing device 41 according to the eighth aspect is the connector photographing device 41 according to the first aspect, and is a first aspect of adjusting the positions of the cameras 53, 54, 55, 56 in the central O2 axis direction of the outer cylinder 61. It has adjusting devices 71 and 81. As a result, the focus and shooting range of the cameras 53, 54, 55, 56 can be easily adjusted.

The connector photographing device 41 according to the ninth aspect is the connector photographing device 41 according to the first aspect, and positions the cameras 53, 54, 55, 56 in the direction orthogonal to the central axis O2 direction of the outer cylinder 61. It has second adjusting devices 72 and 82 for adjusting. As a result, the shooting range of the cameras 53, 54, 55, 56 can be easily adjusted.

The connector imaging method according to the tenth aspect includes a step of fitting the tip of the connector 105 into the connector mounting opening 52 of the connector imaging device 41 and a central axis O2 of the tip of the connector 105 with respect to the connector imaging device 41. The step of positioning in the direction, the step of irradiating the tip of the connector 105 fitted in the connector mounting opening 52 with the lighting device 57 with light, and the step of fitting the connector mounting opening 52 with the cameras 53, 54, 55, 56. It includes a step of photographing the tip of the combined connector 105. As a result, a photographed image of the tip of the connector 105 can be acquired, and a defect of the connector 105 can be easily found from the photographed image of the connector 105. As a result, the soundness of the connector 105 can be evaluated with high accuracy, and the workability of the inspection work can be improved.

The connector inspection jig according to the eleventh aspect is the connector inspection jig 90 of the connector 105 in which the pin connector 113 is arranged inside the ring-shaped main body 111, and is inside the operation unit 91 and the main body 111. It includes an inspection member 92 having an inspection hole 94 to be fitted and into which a pin connector 113 can be inserted, and a connecting member 93 for connecting the operation unit 91 and the inspection member 92. As a result, when the inspection member 92 is fitted inside the main body 111 of the connector 105, a defect in the connector 105 can be easily found according to the insertion state of the pin connector 113 in the inspection hole 94. As a result, the soundness of the connector 105 can be evaluated with high accuracy, and the workability of the inspection work can be improved.

The connector inspection method according to the twelfth aspect includes a step of grasping the operation portion 91 of the connector inspection jig 90 and fitting the inspection member 92 inside the main body 111, and a state in which the pin connector 113 is inserted into the inspection hole 94. It has a step of determining a defect of the pin connector 113 accordingly. As a result, the soundness of the connector 105 can be evaluated with high accuracy, and the workability of the inspection work can be improved.

In the above-described embodiment, the camera is composed of one central camera 53 and three side cameras 54, 55, 56, but the camera is not limited to the arrangement position and number of cameras. Further, although the lighting device 57 is arranged behind the cameras 53, 54, 55, 56, the lighting device 57 is arranged in front of the cameras 53, 54, 55, 56, and the same as the cameras 53, 54, 55, 56. The lighting device 57 may be arranged at the position.

Further, in the above-described embodiment, the connector 105 has the main body 111, the fastening portion 112, and a plurality of pin connectors 113, but the configuration and shape of the connector 105 are not limited.

Further, in the above-described embodiment, the present disclosure has been described by applying the present disclosure to the connector 105 used in the control rod drive device of the pressurized water reactor, but the reactor is a boiling water reactor (BWR) or a boiling water reactor (BWR). It may be applied to any nuclear reactor such as a fast breeder reactor (FBR). Further, the present invention is not limited to the connector used in the control rod drive device, and can be applied to a connector generally used.

10 Pressurized water reactor 11 Reactor container 12 Reactor container body 13 Reactor container lid 25 Core 26 Fuel assembly 27 Control rod 29 Control rod drive device 40 Connector shooting system 41 Connector shooting device 42 Control unit 43 Operation unit 44 Display unit 45 Recording unit 46 Power supply unit 51 Casing 52 Connector mounting opening 52a Locking recess 53 Central camera 54, 55, 56 Side camera 57 Lighting device 58 Axial positioning unit 59 Circumferential positioning unit 61 Outer cylinder 61a First outer cylinder 61b 2nd outer cylinder 62 1st end plate 63 2nd end plate 63a Outer surface 64 Support member 64a Main body 64b Projection 64c 1st support plate 64d Opening 64e 2nd support plate 64f Opening 65a 1st mounting bracket 65b, 65c, 65d 2nd mounting bracket 66 Handles 71,81 1st adjustment device 72,82 2nd adjustment device 90 Connector inspection jig 91 Operation part 92 Inspection member 93 Connecting member 94 Inspection hole 101 Operation floor 102 Cavity 103 Intermediate panel 104 Cable 105 Connector 111 Main body 111a Convex part 112 Fastening part 113 Pin connector O1, O2 Central axis

Claims (12)

A casing in which the first end plate is fixed to one end in the axial direction of the outer cylinder and the second end plate is fixed to the other end.
A connector mounting opening provided on the second end plate and to which the tip of the connector fits,
A camera arranged inside the casing facing the connector mounting opening,
A lighting device arranged inside the casing facing the connector mounting opening, and
An axial positioning portion provided in the connector mounting opening for axially positioning the connector, and an axial positioning portion.
Connector imaging device. The connector photographing apparatus according to claim 1, wherein the camera has a central camera provided in the central portion of the casing and a side camera provided in the inner peripheral portion of the casing. The connector photographing apparatus according to claim 2, wherein a plurality of the side cameras are provided around the central camera at predetermined intervals in the circumferential direction. The connector photographing device according to any one of claims 1 to 3, wherein the camera is arranged between the lighting device and the connector mounting opening. The connector has a rotatable fastening portion on the outside of a cylindrical main body, the outer peripheral portion of the main body is fitted into the connector mounting opening, and the axial positioning portion is the tip of the fastening portion. The connector photographing apparatus according to any one of claims 1 to 4, wherein the portions come into contact with each other. The connector photographing apparatus according to any one of claims 1 to 5, which is provided in the connector mounting opening and has a circumferential positioning portion for positioning the connector in the circumferential direction. The sixth aspect of claim 6 wherein the connector has a concave portion or a convex portion on an outer peripheral portion, and the circumferential positioning portion has a locking convex portion on which the concave portion is locked or a locking concave portion on which the convex portion is locked. Connector shooting device. The connector photographing apparatus according to any one of claims 1 to 7, further comprising a first adjusting device for adjusting the position of the camera in the axial direction of the outer cylinder. The connector photographing apparatus according to any one of claims 1 to 8, further comprising a second adjusting device for adjusting the position of the camera in a direction orthogonal to the axial direction of the outer cylinder. A step of fitting the tip of the connector into the connector mounting opening of the connector photographing apparatus according to any one of claims 1 to 9.
A step of positioning the tip of the connector in the axial direction with respect to the connector imaging device, and
A step of irradiating the tip of the connector fitted in the connector mounting opening by the lighting device with light.
A step of photographing the tip of the connector fitted in the connector mounting opening by the camera, and
Connector shooting method with. It is a connector inspection jig in which a pin connector is placed inside the ring-shaped body.
Operation unit and
An inspection member that fits inside the main body and has an inspection hole into which the pin connector can be inserted.
A connecting member that connects the operation unit and the inspection member,
Connector inspection jig equipped with. A step of grasping the operating portion of the connector inspection jig according to claim 11 and fitting the inspection member into the main body.
A step of determining a defect of the pin connector according to the insertion state of the pin connector into the inspection hole, and
Connector inspection method with.

Images