JPS6315427Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used in a ship mining seabed mineral resources such as manganese nodules, to transport collected minerals to the ship by connecting pipes one after another on the ship and lowering them into the sea, or vice versa. When pipes are pulled up one after another and separated and stored on board, the movement of the ship (rolling) is used to transport the pipes between the pipe storage location on the ship, the assembly and separation of the pipes that have been compensated for by the vibration compensation device, and the lifting and lowering points. This invention relates to a pipe transfer device for an undersea mineral resource mining vessel that can be used without any trouble even during pitting.

As shown in Fig. 1, a seabed mineral resources mining vessel consists of a pipe string 2 which is formed by sequentially connecting a large number of pipes vertically on a ship's hull 1 and lowering them into the sea. A mining machine 3 mines mineral resources on the seabed 4, and the mineral resources are sequentially transported to a ship through a pipe string 2 using a submersible pump or the like. In order to improve workability by preventing the hull 1 from shaking even when the pipe string 2 is assembled due to wind, waves, etc., pipes that are created by towing the pipe string 2 are added to the shipboard part where the pipe string 2 is assembled. Bending that occurs near the hanging part of the pipe string due to the inclination of string 2 (referred to as trail angle), etc.
A sway compensator 5 is usually provided for the purpose of reducing stresses such as tensile, compressive, etc. The vibration compensation device 5 is not affected by the rolling or pitching of the hull and the pipe string 2
In order to maintain the workbench 8 in a horizontal state at all times under the load, the workbench 8 is supported on the fixed side of the hull 1 so as to be swingable by a shaft 8a.

However, the storage rack 6 that stores a large number of pipes that are connected and separated at the workbench that has been compensated for by the vibration compensation device 5 is not equipped with a storage rack 6 that stores a large number of pipes that are connected or separated at the workbench that has been compensated for by the vibration compensation device 5. 1, the storage rack 6 section of the tube will be affected by the motion of the ship. Therefore, when transferring tubes from the sway compensation compartment to the compartment of the tube storage rack 6 and vice versa, it is necessary to overcome the relative movement occurring between the two compartments.

There is a method using a crane to transfer pipes between the motion compensation section and the section of the storage rack 6 when the ship is shaking, but in this method, the load suspended by the crane swings and moves relative to each other. It requires a lot of manpower to lower the product to a location or to lift it from the same location, making it difficult and dangerous.

Therefore, in general, when transporting long and heavy steel pipes or the like on a ship, the transport path 7 having a concave cross section is placed horizontally in consideration of the rocking during the ship's motion, and the transport path 7 is placed horizontally. It is possible to adopt a system in which the pipe is run using power.

However, when the conveyance path 7 is placed horizontally so as to straddle between the section of the vibration compensator 5 and the section of the storage rack 6, both ends of the conveyance path 7 are fixed to the two sections as shown in FIG. When this occurs, the conveyance path 7 is damaged by being subjected to external forces such as bending, torsion, tension, and compression due to the relative movements in the left-right, front-back, and up-down directions that occur between the two sections due to the ship's vibration. Therefore, even if the conveyance path 7 is made of a flexible material that can be bent, flexible, and expandable, the conveyance path itself will not be damaged.
It is difficult to transport long pipes safely and reliably. In addition, when adopting a method in which one end of the conveyance path 7 is fixed to one of the compartments, for example, one end of the conveyance path 7 is fixed to the oscillation compensator 5 side as shown in FIG. 3, and the other end is When transferring the pipe in the direction of the arrow without fixing it to the rack 6 side, it is difficult to eliminate the relative movement between the transport path and the storage rack side, as in the case of the crane method. Moreover, dangerous work will remain unresolved.

The present invention eliminates the drawbacks of such conventional methods and enables pipes to be transferred safely and efficiently in an unmanned manner between the motion compensation section for hull rolling and pitching and the pipe storage section. This was done for that purpose. In order to achieve this objective, the present invention has a conveyance path installed horizontally between the sway compensation compartment and the storage compartment, which is divided into the sway compensation compartment side and the storage compartment side, and the divided sway compensation compartment side The transport path is vertically movable so that it can follow the vertical movement of the transport path on the storage compartment side, and both divided transport paths are horizontally and vertically displaced due to the rolling of the hull, resulting in left and right movement at the joint between the two. The tube is wide enough to prevent vertical break points, and the bottom surface of the conveying path is shaped like an upward convex arc in accordance with the locus of relative movement in the left-right direction of both conveying paths, and is equipped with means for restraining the pipe in the center of the conveying path. Even when there is relative movement between the vibration compensation section and the storage section, the structure does not cause external forces such as bending, twisting, expansion and contraction on the pipe and conveyance path, and it also improves work safety, efficiency, and labor saving. It was designed to make it possible to

Embodiments of the present invention will be described below based on the drawings.

Figure 4 shows an overview of the present invention, in which pipes are connected on the hull 1 to assemble a pipe string.
As in the case of FIGS. 1 to 3, the work area where pipe strings are disassembled is prevented from moving even though the hull 1 is shaken by waves, etc., using the shake compensator 5, and the work platform 8 is Only the downward load due to the pipe string is kept on, and even if the hull 1 sways from side to side, up and down, and back and forth due to rolling or pitching, the work platform 8 is prevented from being affected by it. On the other hand, a pipe storage rack 6 is installed on the hull 1, and a transport path is placed horizontally between the storage rack 6 and the workbench 8 whose sway has been compensated for by the sway compensation device 5. The present invention has a configuration in which the pipes are transferred one by one onto the workbench 8 via the conveyance path, and the pipes are connected and disconnected by the derrick device 9 on the workbench 8. The conveyance path is divided into a conveyance path 10 on the vibration compensator 5 side and a conveyance path 11 on the storage rack 6 side.
The pipe is divided into two parts, and the pipes can be easily transferred at the opposing parts of these transport paths 10 and 11, that is, at the connecting part, despite the relative movement caused by the shaking of the ship body 1.

To be more specific, one end of the conveyance path 10 is placed on a workbench 8 in a sway compensation section which is compensated by a sway compensator 5 so as not to sway regardless of the sway of the hull 1, and one end thereof can be raised and raised about a horizontal shaft 12. The other conveyance path 11 is connected to an elevator frame 14 in a storage section where a storage rack 6 is installed so that a large number of tubes 13 can be stored therein, and the stored tubes can be taken out and vice versa. The leading end of the conveying path 10 is placed on a support stand 15 that is fixedly supported in a horizontal state and protrudes from the frame 14, so that both the conveying paths 10 and 11
are linearly opposed to each other, and the two transport paths 10,
11, that is, at the connection part, even if the conveyance path 11 on the storage compartment side is vertically displaced, the conveyance path 10 on the oscillation compensation compartment side can rotate vertically about the horizontal axis 12, and the hull 1 Even if pitting occurs and a trail angle of the pipe string 2 (see FIG. 1) occurs, a step is not generated in the vertical direction at the connecting portion of the conveyance paths 10 and 11.

In addition, both of the conveyance paths 10 and 11 have a concave cross-sectional shape, and even when the maximum relative displacement occurs in the left-right and up-down directions due to rolling of the hull 1, there is no disconnection in the left-right and up-down directions at the connecting portions between them. The inner bottom surfaces of both conveyance paths 10 and 11 are made into an upwardly convex arc shape in accordance with the relative rotation locus in the left and right direction of both conveyance paths 10 and 11. . That is, although the conveyance paths 10 and 11 are relatively displaced in the left-right direction due to the rolling of the hull 1, the pipe 13 is now moving from the top of the conveyance path 11 to the top of the conveyance path 10.
To explain the case of transferring the pipe 13 on the conveyance path 11,
When attempting to move onto the conveyance path 10 with the paper set at the center of the conveyance path 11, both conveyance paths 10,
The width of the conveying path 10 is made wide so that the tube 13 does not come off the conveying path 10 even when the tube 11 is displaced at its maximum in the horizontal and vertical directions, as shown in FIG. , conversely, when transferring the tube 13 from the conveyance path 10 to the conveyance path 11, the same applies;
Furthermore, when the hull 1 rolls, it moves in an arc centered on the height O of the rotational axis of the vibration compensator, so both conveyance paths 10 and 11 are designed to form an arcuate surface that matches this rotation trajectory. The inner bottom surface of the conveyance path 10 is made into an upwardly convex circular arc surface as shown in the figure.
To enable smooth delivery of a tube 13 at a connecting portion between both conveyance paths 10 and 11 even when the tube 11 is subjected to a relative displacement of a rolling angle θ°. Both conveyance paths 1 above
The width dimensions of 0 and 11 are rolling values, conveyance path 1
It can be determined in advance from the height above the rotation axis of the vibration compensator of 0.0, 11, etc.

Further, as shown in FIGS. 7 to 10 as an embodiment, the conveyance path 10 has crowned rollers 16 and 17 horizontally attached to both ends thereof, and an endless roller extending between the rollers 16 and 17. It has a conveyor consisting of a belt 18 of
1 also has crowned rollers 19 and 2 attached to both ends.
The belts 18, 21 of the conveyor in these conveyance paths 10, 11 are
The tube conveyance side (upper side) of the conveyor is sloped downward from the center to both sides along the convex arcuate surface of the inner bottom surface of the conveyor paths 10 and 11, and the axes of the rollers 16 and 19 of both conveyors It is configured to be driven by independent conveyor drive geared motors 22 and 23 connected to the conveyor paths 10 and 1.
Side guides 24 and 25 are disposed above the conveying surface of 1, respectively, as tube restraint adjustment devices.The side guides 24 on the conveying path 10 have one end facing the carrier motor 22 side, and the tube 13 is passed through in the axial direction thereof. The piston rod 27 of the hydraulic cylinder 26 attached to the outer surface of the conveyance path 10 is connected to the side guide 24, and the other end side is made to be able to expand in the shape of a flap. The width dimension of the other end side of the side guide 24 can be freely changed by operation. or,
The side guide 25 on the conveyance path 11 is also connected to the conveyance path 1.
The pipe 13 is connected to the side guide 25 through the rod 29 of the hydraulic cylinder 28 so that it can be freely expanded and contracted by the hydraulic cylinder 28, and the pipe 13 is connected to the conveying path 10,
When transferring between 11 and 11, use one side guide 2.
5 (or 24) is moved toward the center and serves as a restraining device to hold the tube 13 in the center, while the other side guide 24 (or 25) expands the connection side to the maximum and holds the tube 13 in place. Make it easy to move and operate.

Note that the gap in the longitudinal direction between the connecting portions of both conveyance paths 10 and 11 is set so that the pitching of the hull 1 and the trail angle of the pipe strings allow the two conveyance paths 10 and 11 to have such a gap that when they are in the closest state, they are in contact with each other.
In Fig. 7, 30 is a rotation stopper that maintains the posture when the conveyance path 10 is rotated 90 degrees, 31 is a latching arm (fixed type), 32 is a latching arm (vertically self-propelled type), and 33 is a lateral movement of the pipe. The transfer device 34 is a traveling transfer device, all of which are hoist type, 35 is an elevator platform, and 37 is a traveling rail.

Further, as shown in FIG. 11, the support stand 15 supports the connection side end of the vibration compensation compartment side conveyance path 10 by a plurality of ball rollers 36 on the support stand 15, and prevents pitching and pipe strings from being connected. Since it slides back and forth depending on the trail angle and is unrelated to the horizontal movement of the conveyance path 11 on the storage compartment side,
The vibration compensation compartment side conveyance path is not twisted in the axial direction.

The ore lifting pipe transfer device of the present invention has the above-described configuration, so when the pipe 13 currently stored in the storage rack 6 is to be transferred to the sway compensation section side, the pipe 13 in the storage rack 6 must be moved. Traverse transfer device 33
is transferred to the center of the storage rack in the left-right direction, and then transferred to the elevator platform 35 by the travel transfer device 34. Next, the pipe 13 is raised by the elevator and placed on the transfer path 11 on the storage compartment side. Move. When the pipe 13 is transferred to the conveyance path 11, the hydraulic cylinder 28 is extended and the side guide 2 is moved.
5 to the inside of each other, and adjust the tube 13 to be located at the center of the conveyance path 11. On the other hand, in the conveyance path 10 on the side of the oscillation compensation section, the hydraulic cylinder 26 is operated to displace the side guide 24 outward, and the width dimension of the side guide 24 is maximized on the side connected to the conveyance path 11.

In the above state, the conveyance path 11 and the conveyance path 1
0 is driven to move the pipe 13 to the conveyance path 10 side. At this time, the pipe 13 is restrained by the side guide 25 while being sent by the conveyor on the transport path 11, but the pipe 13 is transferred from the transport path 11 to the transport path 10.
3, when the hull 1 rolls, the tip of the tube 13 comes into contact with the side guide 24 of the conveyance path 10 and the tube posture is changed, and when the side guide 25 as a restraint device presses the tube 13 firmly, The side guide 25 will be damaged or bending stress will be applied to the tube 13 due to the attitude change. Therefore, in anticipation of such a situation, it is necessary to either allow the side guides 25 to retreat outward when a slight force is applied, or to gradually loosen the restraint by the side guides. In addition, the pipe 13 is the conveyance path 11
If the conveyance path 11 is vertically displaced due to pitching of the hull 1 when transferring from the ship to the conveyance path 10, the connection side end of the conveyance path 10 is centered around the horizontal axis 12 against this vertical shaking. Since it can be rotated, it can easily follow the connecting end of the conveyance path 11, and even if the conveyance path 11 is displaced in the left and right direction due to rolling, no disconnection will occur between it and the conveyance path 10. .

Therefore, for pitching of hull 1,
Since the connecting end of the transport path 10 can easily follow the transport path 11 in the vertical direction, the pipe 13 can be moved from the transport path 11 to the top of the transport path 10 without any trouble. The tube 13 on the tube 11 is wide and has an upwardly facing circular arc on both conveying paths, so that the tube 13 can be reliably transferred onto the conveying path 10 without creating any break points in the horizontal and vertical directions. As shown in FIG. 9, the side guide 24 on the conveyance path 10 is enlarged to the maximum on the side where it connects to the conveyance path 11, so that the pipe can be moved from the conveyance path 11 to the conveyance path 10. In addition, even when the hull 1 is rolling, the meandering of the pipe can be minimized to accommodate it. When the tube 13 is almost moved onto the conveying path 10, the side guide 24 is gradually moved toward the center,
The tube 13 is restrained in the central position. When the tube 13 is moved to the conveyance path 10 as shown in FIGS. 8 and 9 and is restrained in the center by the side guide 24, the seventh
The conveyance path 10 is erected as shown by the two-dot chain line in the figure,
The tube 13 is placed in an upright position. Next, the erected pipe 1
3 to the center position of the derrick device 9 using the racking arms 31 and 32, and lower the pipe 13 using the vertical self-propelled racking arm 32 to remove the pipe at the top end of the already assembled pipe string. After connecting to the pipe, the pipe is lowered by the length of one pipe 13, and the pipe is placed on standby so that the next pipe 13 can be connected.

On the other hand, when pulling up underwater tubes, disassembling them on the workbench 8, and sequentially storing each tube 13 in the storage rack 6, the tubes 13 are placed on the racking arms 31, 32 with the transport path 10 erected. and transfer it into the conveyance path 10. Next, the conveyance path 10 is returned to a horizontal state, and its leading end is placed on the support stand 15 in the storage section for support. Next, the conveyors of both conveyance paths 10 and 11 are driven, and the tube 13 restrained in the center by the side guide 24 is transferred to the conveyance path 11 side. On the conveyance path 11 side, the side guide 25 is kept wide so that it can receive the tube 13 even when the hull is rolling. When the tube 13 is transferred from the top of the conveyance path 10 to the top of the conveyance path 11, the tube 13 is adjusted to the center along the inclined surface of the inner bottom surface using the side guide 25, and then stored in the storage rack 6 by the reverse operation described above.

Note that on the conveyance paths 10 and 11, side guides 2 are provided as restraint devices for holding the tube 13 in the center.
4 and 25, the restraint device may be any device as long as it allows the tube 13 to be located in the center of the conveyance paths 10 and 11, and it may be a simple cylinder instead of a side guide, etc. It goes without saying that any means may be employed and various other changes may be made without departing from the gist of the present invention.

As described above, according to the pipe transfer device of the present invention,
A conveyance path placed horizontally between a motion compensation section that is compensated so as not to move despite the motion of the ship and a storage section for pipes that move due to the motion of the ship is connected to the side of the motion compensation section and the storage section. In addition, even when both conveyance paths are subjected to maximum relative displacement in the left-right, vertical, and front-back directions due to the shaking of the ship, pipes can be transferred smoothly at the joints of both conveyance paths. Since the conveyance path on the side of the compensation section is supported on the workbench whose oscillation is compensated for by the oscillation compensator so as to be able to rotate in the vertical direction, the following excellent effects can be achieved.

(i) Even if both conveyance paths undergo relative movement due to rolling or pitting of the ship's hull, no excessive bending stress will be applied to the pipe, and the connection of both conveyance paths will cause bending, twisting, tension, compression, etc. Therefore, the pipe can be transferred smoothly without any external force acting on it, and without creating a break point at the connection between the two transport paths.

(ii) The worker does not have to consider the existence or magnitude of the above-mentioned relative movement, and can perform the work continuously, eliminating dangerous work and improving safety.

(iii) Even when the ship is shaking, there is no need to stop the pipe transfer operation or reduce the transfer speed, which improves efficiency, and furthermore allows for automation, resulting in labor savings.

[Brief explanation of the drawing]

Figure 1 is an overall view of a seabed mineral resources mining vessel, Figures 2 and 3 are examples of the conventional idea of providing a conveyance path between the ship's vibration compensation section and the pipe storage section, and Figure 4. is a side view showing the outline of the device of the present invention;
FIG. 5 is a sectional view of the conveyance path in the device of the present invention;
6A and 6B are state diagrams in which the conveyance path in the device of the present invention is relatively displaced in the left-right direction, FIG. 7 is a side view of the device of the present invention, and FIG. 8 is an example of the conveyance path in the device of the present invention. 9 is a plan view of FIG. 8, FIG. 10 is a sectional view taken along line A-A of FIG.
FIG. 1 is a plan view of a support base that supports the storage compartment side end of the vibration compensation compartment side conveyance path. 1 is the hull, 3 is the ore collector, 5 is the vibration compensator, 6
10 and 11 are storage racks, 10 and 11 are conveyance paths, 12 is a horizontal rotating shaft, 13 is a tube, 16, 17, 19, and 20 are rollers with crowns, 18 and 21 are belts, and 24 and 2 are
5 indicates a side guide, 5 indicates a vibration compensation section, and 5 indicates a storage section.

Claims (1)

[Scope of utility model registration request] Pipe transfer on a seabed mineral resource mining vessel where a horizontal transfer path is installed between the pipe storage compartment that is subject to ship hull vibration and the compartment whose vibration has been compensated for by a vibration compensation device. In the device, the conveyance path is divided into a vibration compensation compartment side and a storage compartment side. It is mounted and supported on the leading end side of the conveying path fixed to the compartment side, and even if the maximum relative displacement occurs in the horizontal and vertical directions due to rolling of the hull, the opposing ends of both conveying paths can be maintained as a pipe. In addition, the inner bottom surfaces of both conveyance paths are formed to have an upwardly convex arcuate cross-sectional shape in accordance with the locus of the above-mentioned relative displacement movement, and pipes are formed on the surfaces of both conveyance paths. A pipe transfer device for a seabed mineral resource mining vessel, characterized in that it is equipped with a restraint device for holding the pipe in the center.