JPH042476B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention receives a plurality of cold insulating materials carried onto the tank top of an LNG carrier and carried from the top of the tank to the upper corner of the tank, and then sets and attaches them to a predetermined position on the tank side wall. The present invention relates to a cold insulating material mounting device for

As shown in Figures 1 and 2, an LNG carrier houses self-supporting tanks 2 at appropriate intervals inside a hull 1 with a double structure of an outer wall and an inner wall. The bottom part is installed on the inner bottom surface of the hull 1 via a plurality of support stands 3, and a support stand 4 is also interposed between the ceiling wall of the tank 2 and the ceiling of the hull 1, so that the tank 2 is protected from heat. It is designed to be able to expand and contract slightly in the vertical direction by expanding and contracting.

A cold insulation layer is provided over the entire outer wall surface of the tank 2 in order to keep the low-temperature liquefied gas that is contracted into the tank 2 cold.

Various types of cold insulation structures have been conventionally proposed for the cold insulation layer, such as one in which a space is formed outside the tank 2 and the space is filled with a cold insulation material.

In recent years, polyurethane foam (PUF) has been used as a cold insulation material that has a good cold insulation effect and is easy to handle.
It has been proposed that the panel-shaped cold insulation material is formed into a panel shape (block shape), and that the cold insulation layer is formed by attaching the panel-shaped cold insulation materials side by side to the outer wall of the tank.

When attaching such a panel-shaped cold insulator to the outer wall of a tank, which has recently been considered, bolts with internal threads are embedded in the outer wall of the tank 2 at predetermined intervals, and the panel-shaped cold insulator is fitted to each bolt. A method was considered in which a wooden bolt was attached to each piece from the outside of the cold insulation material.

However, fitting a large number of cold insulators one by one into embedded bolts on the outer wall of the tank 2 is extremely difficult to work with, and the work is also very dangerous.

The present invention aims at increasing work safety and efficiency by attaching several of the recently proposed panel-shaped cold insulators to the outer wall of the tank at the same time. It is designed to receive several arrayed cold insulators, transport them to a predetermined position on the side wall of the tank, and install them at the same time.

Embodiments of the present invention will be described below with reference to the drawings.

The cold insulation material mounting device of the present invention is arranged between the inner surface of the hull 1 and the tank side wall 5 in FIGS. 1 and 2, and can be installed on a ship as shown in FIGS. 3 to 6. The hook 8 at the end of the wire 7 let out from the condo winch 6 is locked to the upper end of the support arm 10 at both ends of the gondola 9 via the pin 11, and the outer part of the upper end of the support arm 10 in the gondola 9 and the outer part of the gondola stage 12. A guide roller 13 is attached to each of the guide rollers 1 and 1.
3 is engaged with a lifting guide rail 14 made of H-shaped steel or channel material provided on the inner surface of the hull 1,
The configuration is such that the gondola 9 can be moved up and down along the guide rail 14 via the guide roller 13 by the operation of the condor winch 6.

The hook 8 is formed so that its outer diameter increases counterclockwise around the pin 11 in FIG. It is biased with a clockwise rotating force.
Therefore, the gondola 9 and the wire 7 are normally positioned on a straight line, but if the wire 7 were to break, the support arm 10 is rotated clockwise by the force of the spring 15. The flange portion of the guide rail 14 is held between the guide roller 13 at the upper end, and the gondola 9
It is constructed to prevent the objects from falling.

Further, on the inner side of the support arm 10 of the gondola 9, a vertical guide rail 16 is provided along the support arm 10, and a lifting beam 18 is engaged with the guide rail 16 via a guide roller 17.
In addition, a horizontal table 1 is installed inside the lifting beam 18.
9 is extended, and the horizontal table 19 is configured to be able to move up and down along the guide rail 16 by the operation of a cylinder 46 installed on the gondola stage 12. Further, on the horizontal table 16 is a gate consisting of a girder 20 and legs 21. The mold frame 22 is placed via the forward and backward movement mechanism 23.

The forward and backward movement mechanism 23 of the gate-shaped frame 22 has a fourth,
As shown in FIG. 5 and FIGS. 7 to 9.
That is, a rotating roller 24 is provided on the horizontal table 19, a moving block 25 is placed on the rotating roller 24, and a bracket 26 is fixed to the rear side of the beam 18 to prevent the moving block 25 from falling forward. The bracket 26 is provided with a support roller 27 that contacts the upper surface of the moving block 25. Also, a chain wheel 28 is installed at the front and rear center of the moving block 25.
29, respectively, and guide wheels 30, 30 are provided at both ends of the front portion of the moving block 25, respectively, and the guide wheels 30 are supported by brackets 31, 31 fixed to both sides of the moving block 25. On the guide wheels 30, 30 are the legs 2 of the portal frame 22.
The base block 32 at the lower end of the base block 32 is arranged so that the base block 32 can be transferred from the guide wheels 30, 30 onto the support roller 27, and the brackets 31, 31 are arranged so as to prevent the base block 32 from falling forward. are extended above both sides of the base block 32, and support rollers 33, 3 are attached to the extended portions.
3 will be provided. Furthermore, the other end of the chain 34, which has one end locked to the lower front end of the base block 32, is wrapped around the rear chain wheel 29 and then fixed at an appropriate position on the moving block 25 (fixed part 36), and the other end is fixed to the base block 32 at a suitable position on the moving block 25. The other end of the chain 35, which is locked to the lower rear end of the block 32, is connected to the front chain wheel 28.
After hanging the fixed part 3 on the moving block 25
Fixed at 6. Therefore, when the portal frame 22 is moved back and forth (in the X direction in FIG. 5), the base block 32 moves between the guide wheel 30 and the support roller 27, and during this time the moving block 25 moves on the base block 32. It is configured to move on the rotating roller 24 by 1/2 of the moving amount S. Note that the center of gravity of the gate-shaped frame 22 is always at the front, so there is no risk of it falling backwards. Note that 45 is a guide rail.

As shown in FIG. 10, the girder 20 of the gate-shaped frame 22 has a trolley frame 3 equipped with a plurality of holders 37 at the lower end for receiving one cold insulating material 44.
The upper ends of the carriages 8 are suspended so as to be able to move laterally through wheels 39, and each of the pedestals 37 is provided with a rack 40 extending in the front-rear direction on the lower surface thereof, and a pinion 41 attached to the truck frame 38 is engaged with the rack 40. By rotating the pinion 41 by operating the handle 42, the pedestal 37 can be moved forward and backward.

In addition, in FIG. 10, 43 is an embedded bolt embedded in the side wall 5 of the tank 2, and the cold insulation material 44 is embedded in the side wall 5 of the tank 2.
A hole provided in the center of the cold insulating material 44 is fitted with an embedded bolt 43, and the cold insulating material 44 can be attached by screwing a wooden bolt onto the embedded bolt 43 from outside.

Next, the operation will be explained.

First, move the gondola 9 in advance so that the pedestal 37 is in a position where it can receive the cold insulation material 44.
The winch 6 is operated to keep the tank 2 at a predetermined position near the upper corner. In this state, the plurality of cold insulators 44 in an array that have been transported from above the tank top to the upper corner of the tank 2 are received by each holder 37 of the truck frame 38, as shown in FIG. Thereafter, as shown in FIG. 11, the winch 6 is driven to move the cold insulator 44 to the attachment position, and then the gondola 9 stops lowering. Next, the gate-shaped frame 22 is attached to the forward and backward movement mechanism 2.
3 to bring the cold insulating material 44 close to the side wall 5 of the tank 2, and then the worker on the gondola stage 12 rotates the handle 42 clockwise in FIG. 41 and the rack 40, the cold insulating material 44 is moved forward through engagement with the rack 40.
The hole in the center of the bolt 43 embedded in the tank 2
Fit it into. In this case, several cold insulators 44 are arranged in advance at predetermined intervals according to the installation dimensions of the bolts 43, so by simultaneously advancing each pedestal 37, several cold insulators 44 can be moved at the same time. It can be fitted into each bolt 43, and finally the wooden bolt is screwed onto the bolt 43 from the outside of the cold insulating material 44 to complete the installation. In the above, if the holes in the cold insulation material 44 and the positions of the bolts 43 are slightly misaligned, the gate-shaped frame 22 is
The trolley frame 38 is raised and lowered to perform fine adjustment in the vertical direction, and the trolley frame 38 is moved laterally along the girder 20 of the gate-shaped frame 22 to perform fine adjustment in the left-right direction.

By repeating the above-described operations, a large number of cold insulation materials 44 are sequentially transported and attached as one block to the outer surface of the side wall 5 of the tank 2, and the cold insulation materials 44 are installed side by side as shown in the right half of FIG.

As shown in FIGS. 1 and 2, since the support stands 4 are arranged vertically and horizontally on the ceiling of the tank 2, a device for transporting the cold insulation material 44 to the upper corner of the tank 2 is required. Since it is necessarily configured to be about half the width of the tank 2, the mounting device of the present invention is also basically configured to have a width of about half the width of the tank 2, as shown by the imaginary line in FIG. In the bow and stern directions, the dimensions are approximately half the width of the tank 2, but if necessary, for example, as shown in FIG. Gate frame 2
It may also be possible to perform work by being able to switch between 2 and 22.

As explained above, according to the cold insulation material mounting device of the present invention, it is possible to simultaneously receive and simultaneously install a large number of panel-shaped cold insulation materials arranged at predetermined intervals and transported to the upper corner of the tank on the outer wall of the tank. Therefore, it is possible to safely attach the cold insulation material even in a narrow place, and it is possible to achieve excellent effects such as being able to improve work efficiency.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an LNG carrier, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a schematic front view showing the entire device of the present invention, and FIG. 4 is an enlarged view of a portion of FIG. 3. Figure 5 is a -arrow view of Figure 4, Figure 6 is a -arrow view of Figure 5.
The arrow view, Fig. 7 is the − arrow view of Fig. 5, Fig. 8.
The figure is a detailed diagram showing the forward and backward movement mechanism of the portal frame, and FIG. 9 is an explanatory diagram showing how to hook the chain and the movement stroke in the forward and backward movement mechanism of the portal frame.
Fig. 9A is an explanatory view showing the state before the forward/reverse movement mechanism operates, and Fig. 9B is an explanatory view showing the state of the forward/reverse movement mechanism during operation, Fig. 10 is a view taken in the direction of - arrow in Fig. 4, and Fig. 11. FIG. 12 is a schematic front view showing another embodiment of the present invention. 1 is a hull, 2 is a tank, 5 is a side wall, 9 is a gondola, 22 is a gate type frame, 23 is a forward and backward movement mechanism, 3
7 is a pedestal, 38 is a truck frame, and 44 is a cold insulator.

Claims (1)

[Claims] 1. A gondola is installed between the inner surface of the hull of the LNG carrier and the side wall of the tank so that it can rise and fall, a gate-shaped frame is supported on the gondola so that it can move forward and backward, and the gate-shaped frame is provided with a predetermined interval up to the upper corner of the tank. A trolley frame equipped with a pedestal for receiving a large number of panel-shaped cold insulating materials arranged and transported in a horizontal direction is provided so as to be able to move laterally, and the cold insulating material on the pedestal is pressed against the tank side wall by the trolley frame. A cold insulation material mounting device for an LNG carrier, characterized by being equipped with a mechanism for.