JPS6212718Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cask carrier, and more specifically, to a vessel that transports casks containing spent fuel in nuclear power plants and the like.

Ships are used to transport spent fuel at nuclear power plants, etc., but because the upper deck of conventional cask carriers is located well above the quay, loading and unloading of casks is carried out by ships or ships. This is carried out using a crane installed on the quay, during which the cask is hoisted to a height of more than ten meters above the quay. However, since the cask weighs more than 100 tons and contains spent fuel, hoisting it high poses great risks. Therefore, the present applicant proposed that the depth of the ship be made shallow, a cask storage space equipped with a rail for the mobile dolly is provided on the upper deck, and a cask cooling facility is provided below the upper deck to allow the movable dolly to be stored. We proposed a cask carrier that could easily and safely load and unload casks using the so-called roll-on-off method (Jet Application 1983-
No. 170827). At newly planned nuclear power plants, etc., it is possible to install equipment for movable trolleys on the quay and adopt the roll-on-off system, but at existing nuclear power plants, etc., equipment for movable trolleys can be installed on the quay. Therefore, it is necessary to load and unload casks using the conventional lift-on-off method using a crane.

This invention was made in view of the above-mentioned circumstances, and the purpose is to provide a cask carrier that can easily and safely load and unload casks using either a mobile cart or a crane.

This invention will be explained below with reference to drawings showing embodiments.

A cask carrier is constructed with a shallower depth from the upper deck 1 than a normal carrier, and has a living quarters 2 and a cask storage space 3 on the upper deck 1, and an upper deck below the cask storage space 3. A cooling machine chamber 5 is provided between the double-bottomed inner bottom plate 4 and the double-bottomed inner bottom plate 4 .

In the cask storage space 3, a cask fixed floor 6 is provided on the upper deck 1, and the upper and periphery of the cask fixed floor 6 is surrounded by walls 7 and 8. The cask fixed floor 6 is provided with three movable trolley running grooves 9.
A moving truck rail 10 is provided at the bottom of each groove 9. In addition, horizontal step portions 1 are provided on both sides of the upper part of each groove 9.
1 is formed, and a recess 12 is further formed at a predetermined position on the outside of this step 11. At the bottom of the recess 13 formed at the rear end of the cask storage space 3, there is a rail 1 that is perpendicular to the moving trolley rail 10.
4, and an intermediate truck 15 is movably mounted on this rail 14. And intermediate trolley 1
5 is provided with a movable trolley rail 16 parallel to and at the same height as the movable trolley rail 10 in the groove 9. At the stern of the carrier ship, a ramp 18 equipped with a rail 17 for a movable trolley is provided so as to be freely raised and lowered, and a movable trolley 19 loads a cask C onto the stern upper deck 1 between the ramp 18 and the recess 13. A moving trolley rail 20 for unloading is provided.

A heavy derrick (crane) 21 is installed in the carrier ship so as to penetrate through the upper deck 1 and the top wall 7 of the cask storage space 3, and a cargo handling monitoring room 22 is provided on the upper surface of the rear end of the storage space top wall 7. There is. Furthermore, the cask storage space 3 is provided with a hatch 23 for loading and unloading the cask C using a derrick 21, and a telescopic guide 2 extending downward from the hatch coaming 24 of the hatch 23 is provided.
There are three sets of 5. Each guide 25 includes a total of four vertical fixing members 26, two of which are arranged oppositely on both sides of the hatch coaming 24,
A vertical moving member 27 is attached to each fixed member 26 so as to be movable up and down, and a hydraulic cylinder 28 that moves the moving member 27 up and down with respect to the fixed member 26
and four stoppers 29 provided on the horizontal stepped portion 11 of the cask fixed floor 6 directly below each moving member 27. Each fixing member 26 is made of chevron material,
Its upper end is fixed to the hatch coaming 24. Further, the two front fixing members 26 are connected to each other by a suitable connecting member 30, and one end of a hydraulic cylinder 28 is attached to an intermediate portion of the upper connecting member 30. Two fixing members 26 on the rear side
The same applies to Each moving member 27 is made of a chevron-shaped member, and is attached to each fixed member 26 from the outside in a tight manner and slidable up and down. The two front moving members 27 are connected to each other by a suitable connecting member 31, and the rod end of a hydraulic cylinder 28 is attached to the middle part of the lower connecting member 31 via a suitable length adjuster 32. . Each stopper 29 is made of a short chevron-shaped member, and its upper end surface is approximately at the same height as the cask fixed bed 6. A step-shaped engagement portion 33 is provided at the lower end of each movable member 27, and comes into contact with the upper end surface of each stopper 29 when extended downward, and fits inside the upper end surface of each stopper 29.

The cooling machine room 5 is provided with a cask cooling equipment 34 equipped with a refrigeration machine, a ventilation machine, etc. In the cask storage space 3, a ventilation passage 35 for passing cold air from the cooling equipment 34 is provided between the side wall 8 and the top wall. 7, and a cold air outlet 36 is provided above it.

Whether the cask C is loaded or unloaded by the mobile cart 19 or the derrick 21, the cask C is held on the cask holding base 3.
7, and is moved by a moving trolley 19 inside the carrier. Hydraulic cylinders 38 are fixed upwardly to the movable truck 19 at its front and rear and left and right sides, and the upper ends of the piston rods 39 of the left and right cylinders 38 are connected to each other by a connecting member 40. Fixed horizontal protrusions 41 corresponding to the recesses 12 of the cask fixed floor 6 are provided on both the front, rear, right and left sides of the cask holding base 37 .

1 and 2 show a quay 42 equipped with equipment for movable trolleys, and this quay 42 includes a plurality of movable trolley rails 43 and a rail 44 for lateral movement of unmanned vehicles that merge into one at the tip. A cask moving cart 19 and a wirelessly operated unmanned vehicle 45 for moving the cart 19 by pushing or indexing are arranged thereon.

If the quay is provided with equipment for a mobile cart, the loading of the casks C onto the carrier is carried out using the mobile cart 19 as follows.

That is, first, on land, as described above, the cask C is fixed to the holding stand 37 in a sideways state,
This holding stand 37 is placed on the cart 19. or,
The cask C is fixed to a holding stand 37 placed on a trolley 19 in a sideways state. Then, the rod 39 of the cylinder 38 of the bogie 19 is advanced upward to lift the holding platform 37 and the cask C, and the unmanned vehicle 45 pushes the bogie 19 to move the rail 43 on the quay 42, the rail 17 of the ramp 18, and the upper deck 1. upper rail 2
0 and onto the rail 16 of the intermediate truck 15. Next, the movable cart 19 is moved to the rail 10 in an arbitrary groove 9 of the fixed bed 6, and the protrusion 4 of the holding table 37 is
1 is directly above the recess 12, and then moved to a predetermined position and stopped. When moving the movable trolley 19 into the central groove 9, the intermediate trolley 15 may remain fixed; however, when moving the movable trolley 19 into the left and right grooves 9, after the movable trolley 19 and the unmanned vehicle 45 have been placed, The cart 15 is moved left and right. Once the movable carriage 19 is stopped at a predetermined position within the groove 9, the rod 39 of the cylinder 38 of the carriage 19 is retracted downward. As a result, the holding table 37 gradually descends, and the protruding part 41 eventually fits into the recess 12 of the cask fixed bed 6, and both sides of the lower surface of the holding table 37 are connected to the horizontal step part 11.
supported in contact with. Once the cask holding base 37 is held on the fixed floor 6 in this way, the bogie 19 is stopped, and the unmanned vehicle 45 is separated from the bogie 19.
The cask C is returned to the quay wall 42 through the rails 10, 16, 20, 17, and 43, and the next cask C is loaded. In addition, when loading and unloading the cask C using the movable trolley 19, the movable member 27 of the guide 25 is contracted upward as shown in FIG. Make sure not to interfere with.

The casks C stacked on the fixed floor 6 of the storage space 3 are supported by the horizontal steps 11 on both sides of the holding table 37, and the protruding parts 41 are fitted into the recesses 12, so that the casks C stacked on the fixed floor 6 of the storage space 3 can be moved in either the front, back, left or right direction. It will not move and will be held securely. In addition, cold air is directly blown onto the cask C in the storage space 3 from above by the cooling equipment 34.

Cart 19 moves cask C in storage space 3
When unloading the cargo, the holding stand 37 is lifted by the cylinder 38 of the cart 19, the cart 19 is indexed by the unmanned vehicle 45, and contrary to the above, the holding table 37 is lifted by the cylinder 38 of the cart 19,
0, 16, 20, 17, and 43 to the quay 42.

If the quay is not equipped with a movable trolley, the casks C are loaded onto the carrier ship using the derrick 21 with the ship alongside the ship as follows.

That is, first, move the empty mobile cart 19 to the guide 25.
The rod 39 of the cylinder 38 is advanced upward, and the four moving members 27 of the guide 25 are extended downward by the cylinder 28, and the engaging portion 33 of the guide 25 is fitted against the stopper 29. I'll stop it. Then, the holding stand 37 on which the cask C is fixed in a sideways state is lifted up from the quay by the derrick 21 and moved directly above the guide 25. Next, the holding stand 37 is gradually lowered from above the hatch 23, fitted between the four fixing members 26, and further lowered. As a result, the holding stand 37 descends along the fixed member 26 of the guide 25 and then the moving member 27, and eventually hits the rod 39 and the connecting member 40 of the truck 19 and is supported by them. At this time, the holding table 37 is guided by the fixed member 26 and the movable member 27, and does not move or rotate laterally, so the holding table 37 is lowered by the derrick 21. It can be easily placed in the correct position on the trolley 19 without requiring any manpower. Once the holding stand 37 is placed on the carriage 19, the sling 46 is removed from the holding stand 37 and moved out of the hatch 23, and at the same time, the cylinder 28 moves the sling 46 to the guide 2.
5. Contract the moving member 27 upward. Then, as described above, the holding stand 37 is moved to a predetermined position on the fixed floor 6 by the cart 19 and fixed on the horizontal step portion 11.

Deliver cask C in storage space 3 to 21
When unloading, the holding table 37 is lifted by the cylinder 38 of the cart 19, the moving member 27 of the guide 25 is retracted upward, the cart 19 is moved directly below the guide 25, stopped, and then moved. Part 2
7 is extended downward, the holding base 37 is lifted from above the hatch 23 by the derrick 21, and raised along the movable member 27 and then the fixed member 26,
It is carried out of the ship from the hatch 23, the moving member 27 is retracted upward, and the empty truck 19 is moved from directly below the guide 25.

Cask storage space 3, mobile cart 19, crane 21, guide 25, cask cooling equipment 34,
The configurations of the cask holding stand 37, the unmanned vehicle 45, etc. are not limited to those of the above embodiment, and can be modified as appropriate. For example, in the above embodiment, a fixed floor 6 is provided on the upper deck 1 over the entire surface of the cask storage space 3.
Although a groove 9 and a groove 9 are provided, the fixed bed 6 may not be provided directly below the hatch 23, or the fixed bed 6 may not be provided over the entire surface of the storage space 3. In such a case, the stopper 29 of the guide 25 is mounted directly on the upper deck 1. Furthermore, casks can be loaded and unloaded using a crane installed on the quay without installing a crane on the cask carrier. Further, for each guide 25, the front and rear movable members 27 may be connected by an appropriate connecting member that does not interfere with the holding table 37 during loading and unloading by the crane 21. The same applies to the front and rear fixing members 26. Also, the stopper 29 of the guide 25
is not necessarily necessary. In the above embodiment, the protrusion 41 of the holder 37 is formed integrally with the holder 37, but the protrusion is made to be able to move forward and backward with respect to the holder, so that the holder can be lifted by the trolley 19 or lifted by a crane. The protruding portion may be retracted into the holding table when the holding table is placed, and may be advanced from the holding table only when the holding table is placed on the horizontal stepped portion 11 of the fixed floor 6.

As described above, according to this invention, the depth of the ship is made shallow, and the cask storage space 3 equipped with the rails 10 for moving trolleys is provided on the upper deck 1, and the casks C are loaded and unloaded by the moving trolley 19. In a cask transport ship in which a rail 20 for a mobile trolley is provided on the upper deck 1 of the stern part, the crane 21
hatch 23 for loading and unloading cask C by
is provided on the top wall 7 of the cask storage space 3,
It includes four vertical fixing members 26 fixed to the hatch coaming 24 and four vertical moving members 27 attached to each fixing member 26 so as to be movable up and down and moved up and down by a fluid pressure cylinder 28. Since the telescopic guide 25 is provided in the cask storage space 3, the cask C can be easily and safely loaded and unloaded by either the moving cart 19 or the crane 21. In other words, if equipment for a movable trolley is installed on the quay of a nuclear power plant or the like, the upper deck 1 is set at approximately the same height as the quay without significantly changing the water intake, and the cask C is mounted on the movable dolly 19. Place it on the quay and upper deck 1
It can be easily and safely loaded and unloaded by moving it to and from the storage space 3 above. Even if the quay is not equipped with mobile trolley equipment, the cask C can be loaded and unloaded using the crane 21, and the mobile trolley 19 can be used to load or unload the cask C at any location within the cask storage space 3. can be moved into position. In addition, since the guide 25 that expands and contracts by the hydraulic cylinder 28 is provided in the cask storage space 3, the crane 21
The work of loading the cask C onto the movable trolley 19 can be easily carried out by using the cask C, and it is extremely safe since there is no need for people to approach the cask C at this time. Furthermore, since the four moving members 27 of the guide 25 are connected two by two and moved up and down by one fluid pressure cylinder 28, the extension and contraction mechanism of the guide 25 is extremely simple.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a partially cutaway plan view, and Fig. 3 is a cross-sectional view of the first embodiment.
Fig. 4 is a partially enlarged view of Fig. 3, Fig. 5 is a plan view of Fig. 4, and Fig. 6 shows the guide part. FIG. 2 is an enlarged perspective view with some parts omitted. 1... Upper deck, 3... Cask storage space,
7... Top wall, 10, 20... Rail for moving trolley,
19...Moving trolley, 21...Derrick (crane), 23...Hatch, 24...Hatch coaming, 25...Guide, 26...Fixing member, 27...
...Moving member, 28...Hydraulic cylinder, C...Cask.

Claims (1)

[Scope of utility model registration request] The depth of the ship is made shallow, and a cask storage space 3 equipped with a moving trolley rail 10 is provided on the upper deck 1, and a moving trolley rail 20 for loading and unloading the cask C by a moving trolley 19 is provided on the stern upper deck. 1
In the cask carrier provided above, a hatch 23 for loading and unloading casks C by a crane 21 is provided on the top wall 7 of the cask storage space 3, and four vertical hatches fixed to this hatch coaming 24 are provided. A telescopic guide 25 is provided in the cask storage space 3, and includes a fixed member 26 and four vertical moving members 27 that are vertically movably attached to each fixed member 26 and are moved vertically by a hydraulic cylinder 28. Provided this guide 2
The four moving members 27 of No. 5 are connected two by two,
A cask carrier in which two movable members 27 connected to each other are moved up and down by one hydraulic cylinder 28.