JPS6341435B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a mobile inspection device equipped with, for example, a TV camera, a thermometer, a dosimeter, and other measuring instruments installed in a containment vessel of a nuclear reactor.

(Prior Art) Generally, a pressure vessel, a water supply pipe, a main steam pipe, and various control equipment are built into a containment vessel of a nuclear reactor in a nuclear power plant.
In addition, the inside of the containment vessel is kept airtight even during normal operation or after an accident occurs, as leakage of coolant and release of radioactivity are predicted.

On the other hand, inside the containment vessel, various piping such as the water supply pipe and main steam pipe, valve equipment, and various control equipment are installed, so inspections may be necessary during normal operation or in the event of an accident. be.

However, it is predicted that the radiation dose and temperature inside the containment vessel will be high, so inspectors will enter the containment vessel to check for leaks of cooling water, radioactivity, temperature, atmospheric pressure, etc. It is difficult to test.

Therefore, an unmanned stationary inspection device was installed inside the containment vessel, and the information collected by this inspection device was taken outside the vessel for inspection. condition is,
Even during normal operation, the temperature sometimes rises to about 60℃, and in the event of an accident, it is predicted that the temperature will rise to about 170℃, and it is also possible that the inspection equipment itself becomes radioactive. Therefore, it is not desirable to leave it in the containment vessel.

On the other hand, in view of the above-mentioned points, the present applicant has provided a running rail in a part of the shielding wall of the containment vessel that leads into the airtight casing equipped with an opening/closing door, and has provided a running rail that runs on this running rail. The inspection vehicle is transferred to another inspection running rail installed above the above running rail using a lifting cart equipped with movable rails, thereby inspecting the machinery and equipment installed near the pressure vessel. , which prevents the harmful effects of radioactivity and temperature rise in the inspection vehicle, improves the reliability and safety of various inspection equipment built into the inspection vehicle, and has already proposed a system that enables maintenance and inspection even while the reactor is operating. has been done.

(Problems to be Solved by the Invention) However, since the above-mentioned nuclear reactor inspection vehicle is self-propelled, not only does the entire device become larger, but it also breaks down for some reason while driving. When the vehicle becomes inoperable, workers must directly enter the containment vessel, which poses a safety problem.

The present invention has been made in view of the above-mentioned circumstances, and is capable of automatically inspecting various equipment installed inside the containment vessel by operating from outside the aircraft, and
The present invention provides a mobile inspection device for a nuclear reactor that aims to improve the reliability and safety of various inspection devices in the inspection equipment housing, and also enables maintenance and inspection even when the reactor is in operation. .

[Structure of the invention]

(Means for Solving the Problems and Their Effects) The present invention provides loop-shaped first and second traveling rails in the containment vessel with different heights at the top and bottom,
An elevating frame that also serves as a guide rail is installed in a vertical direction between both running rails, and a hoisting machine is installed on the top of this elevating frame, and the elevating cart can be freely raised and lowered by the hanging rope of this hoisting machine. The first and second traveling rails are provided on the movable rails of the elevating cart, and a transfer vehicle body equipped with an inspection equipment storage body is provided, and each of the movable rails of the elevator vehicle is provided with a transfer vehicle body that is provided with an inspection equipment storage body, and each of the movable rails of the elevating trolley is provided with a transfer vehicle body that runs on each of the traveling rails with each drive chain. A towing vehicle is provided, a coupling device is provided between the towing vehicle and the movable vehicle body, and a coupling release device is provided using a link mechanism that enables the coupling device to be engaged and detached from the movable rail of the elevating cart, and the above-mentioned storage The device is designed to allow maintenance and inspection of various devices while traveling on the first and second travel rails inside the container.

(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

In FIGS. 1 to 9, reference numeral 1 denotes a sealed containment vessel in a nuclear reactor, and inside this containment vessel 1, a concrete shielding body 2 having a cylindrical shape with a bottom is provided. A pressure vessel 3 is sunk into the upper opening of the shield 2 . In addition, a part of the shielding wall of the containment vessel 1 includes:
An airtight housing 4 is provided, and a pair of front and rear doors 5, 6 are provided on the front and back sides of the airtight housing 4.
are provided so that they can be opened and closed alternately. Further, on the entrance/exit passage of the airtight casing 4 where each of the opening/closing doors 5, 6 is located, an outer running rail 7 is provided.
A first running rail 8 is laid horizontally, and this first running rail 8 is provided in the container 1 in a loop shape. Furthermore, above the first running rail 8, a loop-shaped second running rail 9 is laid at different heights, and between this second running rail 9 and the first running rail 8, An elevating frame 10, which also serves as a guide rail, is installed in the vertical direction.

On the other hand, in FIGS. 3 and 4, an elevating cart 12 equipped with movable rails 11 is provided in the elevating frame 10 so as to be able to rise and fall freely, and this elevating cart 12 is provided on both sides of the underframe 13. The wheels 14a, 14b are fitted onto the elevating frame 10, and guide rollers 15a, 15b are provided above and below the underframe 13 so as to come into contact with the inner edge of the elevating frame 10. The movable rail 11 is supported by an arm rod 16 that is slanted and fixed to a part of the second frame 13. Further, a transfer vehicle body 17 having wheels 17a is provided on the movable rail 11 so as to be able to run on the second traveling rail 9, and a pan head 18 is mounted on a part of the transfer vehicle body 17. Inspection equipment storage body 19 through
is installed vertically. In addition, this inspection equipment storage body 1
For example, a TV camera, a thermometer, a dosimeter, a barometer, and other measuring instruments are built into the interior of the device 9.
Furthermore, guide rollers 17b are provided at the upper and lower portions of the transfer vehicle body 17 so as to be in contact with the movable rails 11, as shown in FIG.

On the other hand, on the upper part 10a of the lifting frame 10, a lifting machine 20 such as a winding machine is installed, and the lifting truck 12 is connected to a hanging rope 20a of the lifting machine 20. There is. Therefore,
This hoisting machine 20 lifts the lifting cart 12 with a rope 2
0a, and the movable rail 11 integrated with the elevating cart 12 can move up and down while holding the inspection equipment storage body 19 of the transport vehicle body 17.

Further, as shown in FIG. 3, drive chains 21 and 22 are provided above the first and second running rails 8 and 9 along both running rails 8 and 9. The drive chains 21 and 22 include
Each towing vehicle 23 (only the upper side is shown) provided on both traveling rails 8 and 9 is connected via a connecting rod 24, and this towing vehicle 23 is connected to the second traveling vehicle by the drive chain 21. It is designed to run on rails 9. Note that a towing vehicle (not shown) on the first traveling rail 9 can also be driven by the drive chain 22.

On the other hand, as shown in FIGS. 8 and 9, a coupling device 25 is provided between the transfer vehicle body 17 and the towing vehicle 23 so as to be freely engageable and detachable. That is,
This coupling device 25 is composed of a female coupling portion 26 provided on the bracket 17c of the transport vehicle body 17 and a male coupling portion 27 provided on the bracket 23a of the towing vehicle 23. Further, the female side connecting portion 26 horizontally supports a claw supporting arm rod 28 with a support shaft 29 inside the bracket 17c, and further includes:
This pawl support arm rod 28 is elastically clamped by a pair of clamping members 30 mounted on the support shaft 29 and a coil spring 13 provided thereon so as to be able to move back to the neutral position, and the pawl The bases of a pair of female claw members 32 are pivotally attached to the support member 28 by pins 33, and are provided so as to have the habit of being sandwiched inwardly by a coil spring 34. Furthermore, a flat unlocking piece 35 is loosely mounted on the free end of the claw support arm 28, and this unlocking piece 3
The cam 36 provided at the lower part of the locking member 5 can release the female claw members 32 against the elastic force of the coil spring 34, as shown by the chain lines in FIG. 8, when the lock is unlocked. ing.

On the other hand, the male side connecting portion 27 has a support shaft 37 mounted inside the bracket 23a, a ball bearing 38 is provided on the support shaft 37, and a pin is attached to the bracket 23a at a position parallel to the support shaft 37. A shaft 39 is mounted, a male claw rod 40a is provided on the shaft of the pin 39 via the ball bearing 38, and the claw portion 40b of the male claw rod 40 is engaged with the hook 32a of the female claw member 32. This is what I did to get it. Moreover, this male claw rod 40 is supported by the elasticity of the coil spring 41 and the ball bearing 3.
8 so as to be able to return to the neutral position. In addition, the above bracket 23a
A pair of clamping members 42 are provided on the outside of the male claw rod 4.
0 is provided so that it can be moved back to the neutral position from both sides by the elasticity of a coil spring 43. or,
This clamping member 42 has a pair of positioning adjustment screws 4.
4 is screwed on.

Next, in FIGS. 5 to 7, the arm rod 1
The movable rail 11, which is integrated with the link mechanism 6, is provided with a coupling release device 45 using a link mechanism.
It is provided so that it can be engaged and detached from the That is,
This connection release device 45 is connected to the side plate 1 of the arm rod 16.
6a and the upper part of the movable rail 11, each electric cylinder device 46, 47 is installed, and the output shaft 46a of this electric cylinder device 46 is connected to the first bell crank 5.
0 and the second bell crank 51 are connected, and the first and second bell cranks 50, 51 are connected to the respective support shafts 48,
A lock bar 52 is vertically attached to the first bell crank 50 with a pin 53, and the lock bar 52 is engaged with a through hole 54 formed in a part of the movable rail 17. So,
A spline 57 is connected to the second bell crank 51 through a link 56 having a joint 55 formed by a ball joint, and an engaging member 59 is connected to the unlocking piece 35 through a torsion bar 58 at the lower part of the spline 57. As shown in an enlarged view in FIG. 7, the middle of the spline 57 is loosely supported by a bracket 60 provided on the movable rail 11. The spline 5 located at 60a
7, the base of the horizontal arm rod 61 is slid in the axial direction,
The horizontal arm rod 61 is fitted so that it can rotate together with the spline 57, and the free end 61a of the horizontal arm rod 61 is connected to the output shaft 47a of the electromagnetic cylinder 47.

In addition, in FIGS. 5 and 6, a contact 62 is attached to a part of the movable rail 11, and a pair of switches 63 attached to the transfer vehicle body 17 are attached to this contact 62. They are in contact with each other so that the electromagnetic cylinder devices 46, 47 can be actuated.

Hereinafter, the effects of the present invention will be explained.

In FIGS. 1 and 5, the second traveling rail 9
When inspecting the inside of the containment vessel 1 while traveling above, the towing vehicle 23 is indexed by the drive chain 21 via the connecting rod 24, and the transfer vehicle body 17 connected to this towing vehicle 23 by the coupling device 25 is Together with an inspection equipment storage body 19 that houses a TV camera, etc., it is designed to rotate slowly for inspection.

When the transfer vehicle body 17 returns to the position shown in FIG. 5, the switch 63 is turned on at the contact 62 of the movable rail 11, and the electromagnetic cylinder device 46 linked therewith is activated.
Then, the output shaft 4 of this electromagnetic cylinder device 46
Since 6a is pulled to the right in Fig. 5,
The lock bar 52 is lowered via the first bell crank 50 and fitted into the through hole 54 of the transfer vehicle body 17 to fix the transfer vehicle body 17 on the movable rail 11, and at the same time is engaged via the second bell crank 51. Push down the engaging member 59 and connect this engaging member 59 to the coupling device 25.
At the same time, the electromagnetic cylinder device 47 is activated, so that the output shaft 47a of the electromagnetic cylinder device 47 is connected to the horizontal arm lever 61.
is pulled to the right in FIG. 6, so the horizontal arm rod 61 is rotated together with the spline 57.
Then, the torsion bar 5 is attached to this spline 57.
8, the engaging member 59 is rotated to the left in FIG.
The cam 3 integrated with the unlocking piece 35 already engaged with the
6, this cam 36 rotates both female claw members 3.
2 is opened against the elasticity of the coil spring 34. Then, the hooks 32a of both female claw members 32 release the claw portions 40b of the male claw rod 40, as shown by the chain lines in FIG. Along with the car 23, the second running rail 9
It runs slightly above the vehicle and then stops.

Next, when the above-mentioned lifting machine 20 is operated, the hanging rope 20a is connected to the movable rail 1 to which the transfer vehicle body 17 is fixed.
1 is guided by the lifting frame 10, and is lowered to the position of the first running rail 8 and stopped (see FIG. 3). Therefore, by turning off the power to the electromagnetic cylinder devices 46 and 47 in advance to the coupling device 25 of another towing vehicle (not shown) waiting on the first traveling rail 8, the fifth It is adapted to be connected in the same state as shown in the figure.

Next, the embodiment shown in FIG. 10 is another embodiment of the present invention, in which a brake shoe 64 is provided at the lower end of the lock bar 52 via an elastic body 65. This embodiment has substantially the same content as the embodiment described above.

〔Effect of the invention〕

As described above, according to the present invention, the containment vessel 1
first and second running rails 8 forming a loop inside;
9 are provided at different heights upward and downward, and an elevating frame 10 that also serves as a guide rail is installed in a vertical direction spanning between both traveling rails 8 and 9, and a cage is installed on the upper part of this elevating frame 10. An upper machine 20 is provided, and an elevating trolley 12 is provided on the hanging rope 20a of this hoisting machine 20 so as to be able to rise and fall freely, and the movable rail 1 of this elevating trolley 12
1 is equipped with an inspection equipment storage body 19 that runs on the first and second running rails 8 and 9, and is further provided with a transfer vehicle body 17, and is equipped with an inspection equipment storage body 19 that runs on the first and second running rails 8, 9.
9 is provided with each towing vehicle 23 that runs on each drive chain 21 and 22, and this towing vehicle 23 and the transport vehicle body 17
A connecting device 25 is attached between the lifting cart 1 and
A connection release device 4 using a link mechanism that allows the connection device 25 to be connected to and removed from the movable rail 11 of No. 2.
5, so you can see the outside of the containment vessel 1.
Not only can it be operated automatically, but there is no risk of exposure to radiation during mobile inspections using TV cameras, etc.
Furthermore, it can be incorporated into the storage container 1 with a small volume.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a nuclear reactor incorporating a mobile inspection device according to the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a front view of the mobile inspection device used in the present invention. 4 is a side view of the same as above, FIG. 5 is a front view of the coupling release device of the present invention, FIG. 6 is a plan view of the same as above, and FIG. 7 is an enlarged longitudinal section along the chain line A-A in FIG. FIG. 8 is a partially cutaway plan view of the coupling device of the present invention, FIG. 9 is a sectional view of the same, and FIG. 10 is a diagram showing another embodiment of the present invention. . 1... Containment vessel, 8... First traveling rail, 9... Second
Traveling rail, 10... Elevating frame, 11... Movable rail, 12... Elevating trolley, 19... Inspection equipment storage body,
21, 22... Drive chain, 23... Towing vehicle, 25
...coupling device, 45...coupling release device.

Claims (1)

[Claims] 1 Loop-shaped first and second running rails are provided in the containment vessel at different heights at the top and bottom, and an elevating frame that also serves as a guide rail is placed vertically between the two running rails. A hoisting machine is installed on the upper part of the hoisting frame, an elevating carriage is installed on the hanging rope of the hoisting machine so that it can be raised and lowered, and the movable rail of the hoisting carriage runs on the first and second traveling rails. Further, a transfer vehicle body equipped with an inspection equipment storage body is provided, each towing vehicle is provided for traveling on each of the traveling rails with each drive chain, and a coupling device is provided between the towing vehicle and the above-mentioned moving vehicle body, A moving inspection device for a nuclear reactor, characterized in that a coupling release device using a link mechanism is provided on the movable rail of the lifting carriage, the coupling device being able to be engaged and detached from the coupling device.