JPH0336192Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cable rack for mounting and accommodating cables connected to a rotating plug of a fast breeder reactor in a nuclear power plant.

[Prior art and its problems]

As shown in FIGS. 5 and 6, the fast breeder reactor has a rotating plug 1 at the top of the reactor.
A reactor core 12 such as a control rod drive device and instrumentation leads is attached to the core 12, and control cables 2 and others are connected to their upper ends. When exchanging fuel rods, the cable 2 is removed from the upper end of the rotary plug 1, and while rotating the rotary plug 1, a large number of fuel rods are sequentially exchanged using a fuel exchanging machine with a pantograph arm (not shown). However, the large diameter rotating plug 1
A device 13 such as a CRD seal gas supply device or an argon gas pipe stand is attached to the periphery of the plug 1, and as the rotary plug 1 rotates, the device 13 also rotates. Therefore, there is a risk that the tip of the cable rack main body 5 provided close to the rotary plug 1 may collide with the device 13 or other protruding objects (not shown). Therefore, the cable rack body 5 rotatably supports the horizontal part 3 provided at the upper end of the vertical part 4 in a cantilevered manner as shown in FIG. It is something that moves people.

[Problem to be solved]

Conventional cable racks like this have a long arm of about 4 meters that rotates, which creates a dead space, which limits the installation of other equipment and has the disadvantage that the space around the top of the furnace cannot be used effectively. .
Also, as the horizontal portion 3 rotates within the horizontal plane,
There was a risk that the cable 2 placed and housed in the cable rack body 5 would be damaged. Furthermore, in order to rotatably support the elongated horizontal portion 3, the vertical portion 4 must be made extremely strong, resulting in an increase in cost.

[Means for solving problems]

Therefore, the object of the present invention is to provide a cable rack which eliminates the above-mentioned drawbacks, and the means thereof are as follows.

That is, the tip is located radially away from the upper position of the rotating plug 1 of the fast breeder reactor.
A cable rack body 5 is provided. This cable rack main body 5 has a cylindrical horizontal portion 3 through which a large number of cables 2 are inserted, and a vertical portion 4 formed in an inverted L shape. A plurality of cable guide tubes 6 are installed inside the end surface of the horizontal portion 3 so as to be freely in and out, and the cable 2 is inserted into the cable guide tubes 6. Furthermore, a suspension member 15 is provided in the upper space of the horizontal portion 3, thereby supporting the intermediate portion of the cable 2 so as to be movable up and down. Then, a bending space 7 is formed in the upper space of the horizontal part 3, which is large enough to allow the cable 2 to bend in a mountain shape when the cable 2 is lifted upward by the hanging member 15. This is what I did.

[Effect]

Therefore, according to this cable rack, even if the rotary plug 1 rotates, the equipment 13 on the rotary plug 1
There is no risk of collision between the cable rack and this cable rack. Therefore, the space above the furnace can be used effectively. or,
When removing the tip of the cable 2 from the rotary plug 1, the cable 2 and the cable guide tube 6 can be pulled into the horizontal section 3, so that the cable 2 and the cable guide tube 6 can be easily removed during inspection and maintenance of the fast breeder reactor. It never gets in the way.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a partial vertical sectional view showing the main parts of the present cable rack. FIG. 2 is a perspective view of the main part.

As is clear from FIG. 1, the cable rack main body 5 has a cable 2 and a cable guide tube 6 formed in an inverted L shape. The horizontal portion 3 may be configured to be rotatable around the vertical portion 4, or may be provided fixedly. Further, the upper inner surface of the intermediate portion of the cable rack main body 5 is provided with a bulge, in which a bending space 7 is formed. A large number of cables 2 are then inserted into the vertical section 4 and the horizontal section 3. At the same time, a cable guide tube 6 is provided at the tip of the horizontal portion 3 so as to be able to move in and out. That is, the cable guide tube 6 can protrude from the end face of the horizontal section 3 as shown in FIG. 2, or can be housed within the horizontal section 3 as shown in FIG. Next, a plurality of guide rails 10 are provided on the lower surface of the horizontal portion 3, and the cable support member 8 is guided by the guide rails 10 so as to be freely accessible. This cable support member 8 can be made to protrude from the tip of the horizontal part 3 as shown in FIGS. can support the parts. And cable 2 of rotating plug 1
and the cable 2 of the cable rack main body 5 are removably connected to each other by a connector. FIG. 3 shows this state.

Next, when the cable 2 is removed from the rotary plug 1 for inspection or maintenance, the cable guide tube 6 and the cable 2 are both pulled into the horizontal section 3.
Then, the cable 2 is bent within the bending space 7 by the suspender 15 of the cable 2.

In addition, this hanging body 15 can be constructed from an elastic body or the like. Note that at this time, the cable support member 8 is housed within the guide rail 10.

〔effect〕

The cable rack of the present invention has the above structure and has the following effects.

(1) In the cable rack of the present invention, the main body 5 is formed in an inverted L shape, and the tip of the cable rack is positioned radially away from above the rotary plug 1, so that it can be rotated during inspection and maintenance of the furnace. It is possible to avoid interference between the equipment on the rotating plug 1 and the tip of the cable rack main body 5 as the plug 1 rotates. The cable guide tube 6 allows the cable to protrude from the tip of the cable rack main body 5, and the end of the cable 2 can be detachably connected to the rotary plug 1. Also, cable 2
After removing the cable from the rotary plug 1, the cable guide tube 6 can be drawn into the cable rack main body 5, and the cable 2 itself can be stored inside the horizontal part 3 due to the presence of the bending space 7. The attached cable 2 does not get in the way during various inspection and maintenance work. Moreover, the dead space around the cable rack can be eliminated, and the space around the upper part of the furnace can be used effectively. At the same time, the length of the horizontal portion 3 can be shortened due to the presence of the cable guide tube 6, and the rack structure can be simplified.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway view showing the main parts of the cable rack of the present invention, Fig. 2 is a perspective view of the main parts of the cable rack, Fig. 3 is an explanatory diagram showing its usage state, and Fig. 4
The figure is an explanatory diagram showing the state in which the tip end of the cable 2 is removed from the rotary plug 1, FIG. 5 is a plan view of a conventional cable rack, and FIG. 6 is an elevational view thereof. DESCRIPTION OF SYMBOLS 1...Rotating plug, 2...Cable, 3...Horizontal part, 4...Vertical part, 5...Cable rack body, 6...Cable guide tube, 7...Bending space part,
8... Cable support member, 9... Connector, 10
... Guide rail, 11 ... Terminal box, 12 ... Furnace core, 13 ... Equipment, 14 ... Support leg, 15 ... Hanging body, 16 ... Lock member.

Claims (1)

[Claims for Utility Model Registration] 1. A cylindrical horizontal portion 3 and a vertical portion 4 whose tips are located radially away from the upper position of a rotating plug 1 of a fast breeder reactor, and through which a large number of cables 2 are inserted. a cable rack main body 5 formed in an inverted L-shape; a plurality of cable guide tubes 6 which are installed in the end surface of the horizontal section 3 so as to be able to enter and exit freely and into which the cables are inserted; and the horizontal section 3.
A suspension member 15 is provided in the upper space of the horizontal portion 3 and supports the intermediate portion of the cable 2 in a vertically movable manner. A cable rack comprising a bending space 7 having a sufficient width so that the cable 2 can be bent in a mountain shape when lifted. 2. A cable support member 8 is provided on the lower surface of the horizontal portion 3 so as to be able to freely move in and out in the longitudinal direction of the horizontal portion 3, and the lower surface of the end of the cable 2 is provided at the tip of the support member 8. A cable rack according to claim 1, which is configured to be supported.