JP3962626B2 - Cask lashing device and cask transport ship - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
More particularly, the present invention relates to a cask lashing device and a cask transport ship for tying the cask to a mounting base of a transport body such as a transport ship or a transport vehicle. .
[0002]
[Prior art]
Conventionally, cask lashing in a spent nuclear fuel carrier ship or transport vehicle is to be carried out manually by installing a cask fixed on a dedicated platform on a predetermined mounting platform such as a transporting vessel, and then mounting the platform manually with bolts and nuts. A tightening method is common. In addition to this, there is also a method in which a cask is installed in a stopper fixed by welding on four sides on the mounting base, and a wedge is manually driven into the gap between the cask mounting base and the stopper to fix the mounting base to the mounting base. It is done.
[0003]
In the case of the above-described bolt and nut tightening method, the base is provided with bolt holes with a diameter of 50 mm on both sides of the base, aligned in the longitudinal direction of the base at seven places on one side, for a total of 14 places. On the other hand, a similar bolt hole is provided in the loading platform in the hold of the transport ship. After matching, tighten by attaching M45 bolts and nuts.
[0004]
A similar bolt hole is provided in the mounting base of the transport vehicle for transporting the cask over the ground, and the base is secured by the same procedure as in the transport ship. In addition, although it replaces with the above-mentioned lashing device by manual work, the lashing device which can be operated remotely is proposed, but it has not been put to practical use yet.
[0005]
[Problems to be solved by the invention]
By the way, since the cask is a heavy object with a weight of about 100 tons or more including the dedicated frame, the cask is loaded with a quay crane to align the mounting hole with the bolt hole of the frame when loading and securing the cask. In addition, an auxiliary rope is attached to the four sides of the cask, and many workers are pulling from the four sides. There is a problem that this work is inefficient and requires a lot of labor. In addition, the size of the bolts is large, and considerable labor is required for mounting and tightening 14 sets of bolts. In addition, since a large number of casks are mounted side by side on a ship, there is a problem that the working space is limited and it is necessary to pay attention to safety.
[0006]
In addition, the cask contains radioactive materials, and the above work is a manual work close to the cask, so it is necessary to engage many workers in turn to manage the exposure of workers. There is also a point. The present invention is intended to solve such problems, and provides a cask lashing device and a cask transport ship that can easily fix a cradle to which a cask is fixed to a cask transport means or the like. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a cask lashing device according to the present invention includes a rotator having a rotation center at a predetermined position while tying the gantry sandwiched from both sides of the cask longitudinal axis direction of the gantry for fixing the cask. And having fixed portions at different distances from the center of rotation of the rotating tool.
[0008]
By providing the fixed portion at a different position from the rotation center, when the rotation tool is rotated around the rotation center, the interval between the rotation tools arranged so as to be sandwiched from both sides of the gantry can be changed. Accordingly, even when the dimensions of the gantry in the longitudinal direction of the cask are different, it can be dealt with by rotating the rotating tool, and a separate fixing member such as a metal fitting is not required. For this reason, the cask can be easily secured to a cask transport ship or the like. Also, the configuration of the lashing device is simplified. The fixing tool corresponds to, for example, the fixing bracket described in the embodiment, but is not limited to such a configuration as long as the distance from the rotation center to the fixing portion is different. The structure of the fixing part may be a plate shape or a block shape. Further, the rotating tool may be made of sheet metal, cast product, or PC concrete.
[0009]
The cask lashing device according to the next invention is the cask lashing device according to the above-mentioned configuration, wherein the rotating tool constitutes the fixing portion by erecting a fixing plate on three side edges of a rectangular bottom plate, and the fixing portion is the bottom plate It is characterized in that it is inclined inwardly from the vertical direction or from the vertical direction . By tilting this fixed part vertically or slightly inward, it functions as a guide for placing the cask base. As a result, the cask can be easily secured.
[0010]
Cask lashing device according to another feature of the invention includes a rotary member having a rotation center in a predetermined position while lashing the gantry across from both sides of the cask longitudinal direction of the frame for fixing the cask, the rotary tool is A bottom plate having a center of rotation, and a plurality of fixed plates that are provided in the vicinity of the periphery of the bottom plate and tilted inward from the vertical direction or the vertical direction with respect to the bottom plate surface, and at different distances from the rotation center. It is configured.
[0011]
A plurality of fixing plates are set up on the periphery of the bottom plate, and the distance from the center of rotation of the bottom plate to each fixing plate is different. You can change the interval. Accordingly, it is possible to easily cope with a cask gantry having different dimensions in the longitudinal axis direction. In addition, since a metal member is not required for each different cask mount, the configuration is simplified. Furthermore, when the fixed plate is slightly inclined from the vertical direction or the vertical direction of the bottom plate surface, a function as a guide for the cask rack can be provided.
[0012]
The cask lashing device according to the next invention has the above-described configuration, and further includes a slide type that fixes the gantry from both sides in the width direction perpendicular to the longitudinal axis direction of the cask gantry and is movable in the width direction. A fixing tool is provided.
[0013]
In this invention, the said base is fixed by sliding a slide-type fixing tool to the width direction of a base. Thereby, the mount frame of the cask can be secured in the longitudinal direction and the width direction. The slide fixture may be made of sheet metal, cast or concrete.
[0014]
The cask lashing device according to the next invention has a pair of fixing tools for securing the gantry sandwiched from both sides in the width direction perpendicular to the cask longitudinal axis direction of the gantry for fixing the cask. A step-like claw for engaging with the gantry is provided and can be moved by an actuator.
[0015]
The platform is secured by sliding the fixture and locking the stepped claws to the platform. By the locking with the claw, the width direction and the vertical direction of the gantry can be restrained. In addition, since the claws are stepped, it can be used for cask mounts with different dimensions. For example, since a large cask has a large diameter, it is possible to prevent the cask and its buffer body from coming into contact with the transportation means by fixing the gantry with upper claws (the gap between the opposing claws is widened). The fixture is made of a metal block or concrete.
[0016]
A cask transport ship according to the next invention includes the cask lashing device according to any one of the above, and lashes the cask in a direction in which a longitudinal axis direction of the cask is substantially perpendicular to a longitudinal axis direction of the hull. The cask lashing device is installed so that it can be loaded.
[0017]
When loading the cask in the longitudinal axis direction, it may be loaded in the center in the longitudinal axis direction. However, when the cask is loaded with a deviation from this center, the hull is tilted by the cask that is a heavy object of about 100 tons, and the There is a drawback in that it is difficult to carry out the binding load work. For this reason, since the cask is lashed and loaded in a direction substantially perpendicular to the longitudinal direction of the hull, the work can be performed without tilting the hull, and the lashing and loading operation of the cask becomes easy.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. The constituent elements of the embodiments of the present invention include those that can be easily replaced by those skilled in the art or those that are substantially the same.
[0019]
(Embodiment 1)
1 is a perspective view showing a cask securing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the rotating metal fitting shown in FIG. 3 is a perspective view showing a state in which the cask is secured by the cask securing device of FIG. FIG. 4 is a side view showing a cask tying state. The cask securing apparatus 100 includes a rotating metal fitting 1 that fixes the cask 101 in the axial direction of the gantry 102 and a sliding metal fitting 2 that fixes the cask 101 in a direction perpendicular to the axial direction of the gantry 102 (the radial direction of the cask 101). And have. As shown in FIGS. 3 and 4, the gantry 102 of the cask 101 has a structure in which a cross member 104 is passed to both side frames 103 of an I-shaped steel material. On the other hand, it is bolted. The sliding bracket 2 has an L-shaped cross section, moves on a rail 3 laid in the radial direction of the cask 101, and is driven by a hydraulic cylinder (not shown). At both ends of the cask 101, buffer bodies 105 having a can-making structure or a wood-enclosed can structure are provided.
[0020]
As shown in FIG. 2, the rotating metal fitting 1 has a fixed plate 5 erected on three edge portions of a rectangular bottom plate 4. The fixing plates 5 are reinforced by ribs 6 respectively. Further, the bottom plate 4 is provided at a position where the rotation center 7 is eccentric from the center. As shown in FIG. 2B, the rotation center 7 is provided with a screw 8 that penetrates the bottom plate 4 and is screwed into the hull 150. A head 8a of the screw 8 is a knurled knob, and can freely fasten and fix the bottom plate 4 to the hull 150, and also serves as a rotation axis of the rotary fitting 1. The bottom plate 4 is provided with a hole 9 for preventing rotation. The hull 150 is provided with a hole 11 into which the detent pin 10 is inserted. The fixing plate 5 is inclined inwardly from the vertical direction or from the vertical direction with respect to the bottom plate 4 and functions as a guide when the gantry 102 of the cask 101 is lowered.
[0021]
Further, as shown in FIG. 2C, the distances from the rotation center 7 to the fixed plates 5 are different. In other words, since the axial length varies somewhat depending on the size of the cask 101, three types of distances from the rotation center 7 are prepared in the figure to cope with the difference in the length of the base 102 of the cask 101. . Specifically, the first fixed plate 5a has a distance from the rotation center 7, the second fixed plate 5b has a distance b from the rotation center 7, and the third fixed plate 5c has a distance from the rotation center 7. Becomes c.
[0022]
As shown in FIG. 3, the gantry 102 to which the cask 101 is fixed is positioned by the rotating metal fitting 1 in the axial direction of the cask 101 and fixed by the sliding metal fitting 2 in the direction perpendicular to the axial direction. Here, the rotating metal fitting 1 has its axial dimension adjusted for the large cask shown in FIG. 3, that is, the rotating metal fitting 1 is rotated so as to correspond to the size of the large cask base 102, and a predetermined The gantry 102 can be held between the fixing plates 5. The rotating metal fitting 1 restricts the rotating metal fitting 1 from being rotated at the position where a fixing pin 10 for fixing is inserted into the holes 9 and 11 at a position where the predetermined fixing metal fitting 1 faces the fixed side.
[0023]
5-7 is sectional drawing which shows the state which installed the cask in the cask transport ship. A plurality of casks 101 are loaded on the cask transport ship 160 together with the gantry 102. The loading direction of the cask 101 is such that the longitudinal axis M of the cask 101 is perpendicular to the longitudinal axis N of the hull. The weight of the cask transport ship 160 is several thousand tons, whereas the weight of the cask 101 is 100 tons or more. This is because if the cask transport ship 160 is loaded to be deviated from the longitudinal axis N to the left and right, the cask transport ship 160 is greatly inclined at sea, and the loading operation becomes extremely troublesome.
[0024]
The cask transport ship 160 has a two-story structure, and the cask lashing device 100 is attached to the hull 150 and the hatch cover 161, respectively. The hatch cover 161 is divided in the hull axis direction, and is opened upward when the cask 101 is loaded on the lower floor (the open state is indicated by a one-dot chain line). The inside of the hull 150 has a framework structure (not shown), and a hatch cover 161 is placed and supported on the structure in a closed state. The cask lashing device 100 is attached to the hatch 161a on one side, and the cask lashing device 100 is positioned on the upper surface of the hatch cover 161 with the hatch cover 161 closed.
[0025]
Next, a procedure for securing the cask 101 will be described. First, when loading the cask 101 on the first floor of the hull 150, the hatch cover 161 is opened, and when loading on the second floor of the hull 150, the hatch cover 161 is closed. In this embodiment, the cask transport ship 160 has a two-story structure, but may have a one-story structure or a three-story structure or more. Next, the cask 101 fixed to the gantry 102 is lifted by a crane installed in the harbor and conveyed to the ship as it is.
[0026]
On the other hand, the rotating metal fitting 1 of the cask lashing device 100 is adapted to the dimensions of the cask 101 loaded in the above manner. Subsequently, the cask 101 is gradually lowered into the ship 150, and the longitudinal end of the gantry 102 comes into contact with the fixed plate 5 of the rotating metal fitting 1. Since the fixed plate 5 is erected vertically or slightly inwardly, the gantry end contacts the fixed plate 5 and descends while being guided. The sliding metal fitting 2 is opened slightly larger than the vertical direction (width direction) in the longitudinal direction of the gantry 102 of the cask 101. The sliding metal fitting 2 is closed immediately before the gantry 102 contacts the ground, and the gantry 102 is placed in the loading position. Move to adjust.
[0027]
Then, the cask 101 is lowered to the bottom of the ship and is sandwiched by the slide type metal fitting 2. As a result, the longitudinal direction of the gantry 102 of the cask 101 is fixed by the rotating metal fitting 1 and the vertical direction thereof is fixed by the sliding metal fitting 2. Next, when loading the cask 101 having a different size, as shown in FIG. 1, the rotating metal fitting 1 is rotated to change the interval between the fixed plates 5. For example, the frame size of the largest cask 101 is indicated by the outermost dotted line 21 in FIG. 1. When the medium-sized cask 101 is loaded from this state, the rotating metal fitting 1 is rotated and another fixing plate 5 is attached. Turn inside. As a result, the gantry 102 of the medium-sized cask 101 shown by the dotted line 22 at the center can be loaded and fixed. This is because, as described above, each fixing plate 5 of the rotating metal fitting 1 has a different distance from the rotation center 7, so that the interval L between the fixing plates 5 can be changed by rotating the rotating metal fitting 1. is there.
[0028]
Similarly, when the small cask 101 is loaded and fixed (for example, the dimension of the mount 102 of the small cask 101 is indicated by the innermost dotted line 23), the rotating metal fitting 1 is rotated to change the interval L between the fixing plates 5. it can. According to the cask lashing device 100 described above, even casks 101 of different sizes can be easily and easily lashed without replacing the fixing means. In the figure, the cask 101 is secured by laying the cask 101 in the horizontal direction. However, the same base 102 is installed in the lower part in a state where the cask 101 is erected, and the cask 101 is secured by the cask securing device 100. You may do it. Moreover, although the case where the cask 101 was stored in the cask transport ship 160 was shown in the said embodiment, the object of lashing is not limited to the cask transport ship 160. FIG. For example, it can also be used for securing the cask 101 in a dry storage of the cask 101. In the above embodiment, three fixing plates 5 are used so as to correspond to the three types of cask 101, but four or more fixing plates 5 may be used.
[0029]
Further, the rotating metal fitting 1 may have an elliptical shape as shown in FIG. The rotating metal fitting 30 has a structure in which a fixed plate 32 is erected in an annular shape on the periphery of an elliptical bottom plate 31. The bottom plate 31 has a rotation center 33 at a position deviated from the center. As described above, the rotation center 33 is fixed to the hull 150 by a bolt 34 having a knurled head. In such a configuration, the distance from the rotation center 33 to the outer surface of the fixed plate 32 continuously changes. Accordingly, it is possible to cope with the gantry 102 of the cask 101 of any size.
[0030]
(Embodiment 2)
FIG. 9 is a perspective view showing a cask securing apparatus according to Embodiment 2 of the present invention. The cask tying device 200 includes front and rear frames 201, a clamp fitting 202 attached to the inside of the frame 201, and a hydraulic cylinder 203 that drives the clamp fitting 202. The frame 201 is provided with a protrusion 204 that restricts the longitudinal movement of the gantry 102 of the cask 101. The projection 204 has a slope on the inside, and fulfills a guide function when securing the gantry 102. A pair of clamp fittings 202 are provided for the hydraulic cylinder 203, and one of the clamp fittings 202 is attached to the cylinder rod 205 and is movable. The clamp fitting 202 has a stepped claw, and the upper claw 206 fixes the gantry 102 of the large-sized cask 101 and the lower claw 207 fixes the gantry 102 of the medium-sized cask 101. The upper and lower claws 206 and 207 also fix the gantry 102 of the cask 101 in the vertical direction.
[0031]
FIG. 10 is a perspective view showing a state in which a large-sized cask is secured by the cask securing apparatus. FIG. 11 is a perspective view showing a state in which a medium-sized cask is secured by the same cask securing device. In this way, when the large cask 101r is secured, a part of the gantry 102r is sandwiched between the upper claws 206. Further, the protrusion 204 is positioned between the outer cylinder 106 of the cask 101r and the buffer body 105 and restrains the axial movement of the cask 101r. Further, the upper claw 206 also enters the inside of the I-shaped steel constituting the frame 103, and thus has a binding force in the cask axis direction. Furthermore, in the configuration shown in the figure, since the gantry 102r is large, the gantry 102 is placed on the upper surface 201a of the frame 201. For this reason, even if the size of the gantry 102r is large, the gantry 102r can be supported on the securing device 200. Moreover, since the nail | claw 206 is located in the upper stage, even if the diameter of the cask 101r is large, it does not contact the installation surface of the securing device 200.
[0032]
In the cask securing procedure, first, the clamp fitting 202 is moved to a position where the upper stage surface 208 of the clamp fitting 202 can support the gantry 102r. Then, the cask 101r lifted by the crane is lowered together with the gantry 102r, and the end of the gantry 102r is supported by the upper surface 208 of the clamp fitting 202 while being guided by being brought into contact with the slope of the projection 204. Subsequently, the hydraulic cylinder 203 is operated to narrow the interval between the clamp fittings 202, and the gantry 102r is restrained by the upper claw 206.
[0033]
In the case of the medium-sized cask 101m, since the length of the gantry 102m in the cask axial direction is shorter than the gantry 102r of the large cask 101r, the gantry 102m enters between the front and rear frames 201 and the cask itself is displaced and fixed. Interference between the projection 204 of the frame 201 and the cask 101m can be avoided. That is, since the clamp fitting 202 is attached to the cylinder rod 205 of the hydraulic cylinder 203 and only the clamp fitting 202 moves, the large-sized cask 101r is attached when tying the gantry 102m of the medium-sized cask 101m. It will deviate somewhat from the central axis when tying. For this reason, the protrusion 204 does not interfere with the medium-sized cask 101m. Thus, even the middle-sized cask 101m can be easily secured by moving the clamp fitting 202. Further, by allowing the gantry 102m to be accommodated inside the frame 201, it is possible to perform restraining in the front-rear direction. The vertical restraint is performed by the lower claw 207. The gantry 102 m is supported by the lower surface 209 of the clamp fitting 202.
[0034]
According to the cask lashing device 200 described above, the casks 101 having different sizes can be easily and easily secured without exchanging the fixing means. In the above embodiment, two steps are used to correspond to the large and medium-sized cask 101, but three steps may be used to correspond to the small-sized cask 101.
[0035]
【The invention's effect】
As described above, in the cask lashing device of the present invention, the cask is secured from the both sides of the cask longitudinal axis direction of the gantry to fix the cask, and the gantry is secured and has a rotating tool having a rotation center at a predetermined position. Since the fixing parts are provided at different distances from the rotation center of the rotating tool, the cask can be easily secured to the cask transporting means. In addition, the configuration of the lashing device can be simplified, and it can be used for cask mounts with different dimensions.
[0036]
Moreover, in the cask lashing device of the present invention, since the fixing portion is inclined inwardly from the vertical direction or from the vertical direction with respect to the bottom plate , the cask can be further easily lashed.
[0037]
Further, in cask lashing device of the invention has a rotary tool having a rotation center in a predetermined position while lashing the gantry across from both sides of the cask longitudinal direction of the frame for fixing the cask, the rotary tool is A bottom plate having a center of rotation, and a plurality of fixed plates that stand near the periphery of the bottom plate and are inclined inwardly from the vertical direction or from the vertical direction with respect to the bottom plate surface, and have different distances from the rotation center. Therefore, it is possible to easily cope with a cask gantry having different longitudinal dimensions. Further, the configuration is simplified and the cask mount can be more easily secured by the guide function of the cask mount.
[0038]
Further, in the cask lashing device of the present invention, a slidable fixing device that is sandwiched from both sides in the width direction perpendicular to the longitudinal axis direction of the cask gantry and is movable in the width direction is further provided. Since it is provided, the cask mount can be easily secured in the longitudinal direction and the width direction.
[0039]
Further, in the cask lashing device of the present invention, the cask lashing device includes a pair of fixing tools for fixing the gantry sandwiched from both sides in the width direction perpendicular to the cask longitudinal axis direction of the gantry for fixing the cask. Since stepped claws for locking to the gantry are provided and can be moved by an actuator, it can be adapted to casks of different sizes and can be easily secured.
[0040]
Further, in the cask transport ship according to the present invention, the cask lashing device according to any one of the above is provided in the ship, and the cask is fixed in a direction in which the longitudinal axis direction of the cask is substantially perpendicular to the longitudinal axis direction of the hull. Since the cask lashing device is installed so that it can be lashed and loaded, the cask lashing and loading operation is facilitated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cask securing apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a perspective view showing the rotating metal fitting shown in FIG.
3 is a perspective view showing a state in which a cask is secured by the cask securing apparatus of FIG. 1. FIG.
FIG. 4 is a side view showing a cask tying state.
FIG. 5 is a cross-sectional view showing a state in which a cask is installed on a cask transport ship.
FIG. 6 is a cross-sectional view showing a state in which a cask is installed on a cask transport ship.
FIG. 7 is a cross-sectional view showing a state in which a cask is installed in a cask transport ship.
FIG. 8 is a perspective view showing a modified example of the rotating metal fitting shown in FIG.
FIG. 9 is a perspective view showing a cask securing apparatus according to Embodiment 2 of the present invention.
10 is a perspective view showing a state in which a large-sized cask is secured by the cask securing apparatus of FIG. 9. FIG.
11 is a perspective view showing a state in which a medium-sized cask is secured by the cask securing apparatus of FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 Cask securing apparatus 101 Cask 102 Base 105 Buffer body 1 Rotating metal fitting 2 Sliding metal fitting 4 Bottom plate 5 Fixing plate 7 Center of rotation 8 Screw 9 Hole 10 Pin 160 Cask transport ship

Claims (5)

  The gantry that fixes the cask is sandwiched from both sides in the longitudinal direction of the cask and the gantry is secured, and a rotating tool having a rotation center at a predetermined position is provided, and fixing portions are provided at different distances from the rotation center of the rotating tool. A cask lashing device characterized by that. The rotating tool is configured to stand up a fixed plate at three edge portions of a rectangular bottom plate to constitute the fixed portion, and the fixed portion is inclined inward from the vertical direction or slightly from the vertical direction with respect to the bottom plate. The cask lashing device according to claim 1, wherein: A rotating tool having a center of rotation at a predetermined position and securing the frame sandwiched from both sides of the cask longitudinal axis direction of the frame for fixing the cask;
The rotating tool is
A bottom plate having a center of rotation;
A plurality of fixed plates that are provided in the vicinity of the periphery of the bottom plate and tilted inward slightly from the vertical direction or from the vertical direction with respect to the bottom plate surface,
A cask lashing device comprising: Furthermore, the said cask mount is equipped with the slide-type fixing tool which fixes the said mount on both sides of the width direction perpendicular | vertical to the longitudinal axis direction of the said cask, and can move to the said width direction. The cask lashing device according to any one of 3 above. The cask lashing device according to any one of claims 1 to 4 is provided in a ship,
A cask transport ship, wherein the cask lashing device is installed so that the cask can be lashed and loaded in a direction in which the longitudinal axis direction of the cask is substantially perpendicular to the longitudinal axis direction of the hull.

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