JPS6112314Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a trunk device used when performing underwater work such as offshore joining work and bottom maintenance work on buoyant structures such as ships and floating docks.

In the past, various trunk devices have been developed for use in offshore joining work for modified ships, but from the viewpoint of safety, etc., these types of trunk devices and buoyant structures have been installed in parallel and separated from each other. A plurality of packing strips are interposed to increase the watertightness between these.

However, such conventional trunk devices do not have a means to actively check whether watertightness is maintained sufficiently, so it is necessary to detect water leakage between the packing strips in advance. However, there is a problem in that it is not possible to do so, and as a result, there is a lack of safety.

The present invention is an attempt to solve these problems, and aims to provide a trunk device for underwater work that improves safety by making it possible to actively check its watertight performance.

For this reason, the underwater work trunk device of the present invention has a bottom underwater trunk attached to the lower surface of the bottom of the buoyant structure via a gasket, and a bottom underwater trunk provided on the upper outer surface of both side walls along the longitudinal direction of the bottom underwater trunk. a buoyancy tank, and the plurality of packing strips are arranged in parallel and spaced from each other along the longitudinal direction of the bottom underwater trunk;
A drain pipe with a valve is constructed of a partition member interposed between these packing strips, and for each compartment divided by the packing strip and the partition member, the drain pipe communicates from the compartment to the bottom underwater trunk. It is characterized by the provision of.

Below, a trunk device for underwater work as an embodiment of the present invention will be explained with reference to the drawings.
The figure is a side view, FIG. 2 is a sectional view taken along the - arrow in FIG. 1, FIG.
The figure is a view taken from the - arrow in FIG. 1, and FIG. 5 is a view taken from the - arrow shown in FIG.

As shown in FIG. 1, this trunk device includes a bottom underwater trunk 2 which extends laterally along the lower surface of the bottom of a buoyant structure 1 floating on the sea surface and has an upper opening that can be brought into close contact with the buoyant structure 1 through a packing 5. , a pair of side submersible parts are watertightly connected to the upper surface of both ends of the trunk 2, extend upwardly along both sides of the buoyant structure 1, and have inner openings that can be brought into close contact via other gaskets 5'. It has a trunk 2'.

As shown in FIGS. 2 and 4, the bottom underwater trunk 2 has two packing strips 5a, 5a arranged in parallel and spaced apart from each other at the edge of its upper opening. A horizontal buoyancy tank 3 is provided along the upper periphery.

The center of buoyancy of the horizontal buoyancy tank 3 is designed to be above the center of gravity of the bottom submersible trunk 2.

As shown in FIGS. 3 and 5, the side underwater trunk 2' has two packing strips 5'a, 5'a arranged in parallel and spaced apart from each other at the edge of the inner opening. The lower ends of these packing strips 5'a, 5'a connect the side underwater trunk 2' to the bottom underwater trunk 2.
When assembled to the trunk 2, the packing strip 5 of the trunk 2
a, 5a.

As shown in FIGS. 1 and 3, a vertical buoyancy tank 3' is provided on the outer surface of the side underwater trunk 2'.

By the way, a plurality of partition members 8 are interposed between the packing strips 5a, 5a at predetermined intervals, so that these packing strips 5a,
A plurality of compartments A are formed by partitions 5a and partition members 8.

The height of the partition member 8 is lower than that of the packing strip 5a, and the partition member 8 is made of a steel plate or a packing material.

Furthermore, for each compartment A, a working space 4 in the bottom underwater trunk 2 is provided from the bottom of this compartment A.
A drain pipe 6 is provided which communicates with
is attached.

The bottom end of the drain pipe 6 on the underwater trunk side is open, and a portable drain receiver 7 is disposed below this open end.

Note that the reference numeral 4' in FIGS. 3 and 5 indicates a working space within the side underwater trunk 2'.

To attach this device to a buoyant structure 1 using the above-mentioned configuration, first fill the horizontal buoyancy tank 3 with an appropriate amount of water and align the upper opening of the bottom underwater trunk 2 with the bottom upper surface of the buoyant structure 1, and then drain the water from the buoyancy tank 3 to increase buoyancy, thereby providing the necessary tightening force to the gasket 5 and fixing the bottom underwater trunk 2.

Next, with an appropriate amount of water in the vertical buoyancy tank 3', the inner opening of the side submersible trunk 2 is aligned with the side of the buoyancy structure 1, and the packing 5' is tightened by the tightening force of a turnbuckle (not shown). The side underwater trunk 2' is brought into close contact with the side surface of the buoyant structure 1 through the.

Further, the side underwater trunk 2' is watertightly connected to the upper surfaces of both ends of the bottom underwater trunk 2 by the tightening force of another turnbuckle (not shown).

Then, by draining the water in each buoyancy tank 3, 3' and draining the water in each trunk 2, 2', each trunk 2, 2' is attached to the buoyant structure 1.
With each trunk 2, 2' in close contact with
Working spaces 4, 4' communicating therein are formed.

Then, the valve 6a with each drain pipe 6 is opened to drain the drain accumulated between the packing strips 5a, 5a. At this time, the drain receiver 7 is not set, and the drain is directly dropped into the working space 4 and drained by the drainage pump in the working space 4.

Thereafter, work such as joining the seam B of the buoyant structure 1 is carried out in the working spaces 4 and 4', but if necessary, the valve 6a is opened at predetermined intervals to drain the drain accumulated in each compartment A. is dropped into the drain receiver 7. According to the amount of drain accumulated in the drain receiver 7 in this way, it is possible to know how much drain is accumulated in which compartment. As a result, in the compartment A with a large amount of drain, the watertightness of the packing strip 5a on the outside thereof is poor, and as a result, using this drain amount as a guide, it is possible to reliably know where to repair the packing.

Incidentally, the drain collected in the drain receiver 7 is poured into the work space 4 and discharged by a drainage pump. Further, in order to remove the present trunk device from the buoyant structure 1, it is sufficient to perform an operation that is almost the reverse of the above-mentioned installation work.

As described in detail above, according to the trunk device for underwater work of the present invention, the gaskets interposed between the lower surface of the bottom of the buoyant structure and the bottom underwater trunk are mutually arranged along the longitudinal direction of the bottom underwater trunk. It is composed of a plurality of packing strips arranged in parallel at a distance, and a partition member interposed between these packing strips. With a simple configuration in which a drain pipe with a valve is provided that communicates from the compartment to the bottom submersible trunk, it is possible to easily check whether the watertightness of the packing strips is sufficiently maintained. It is possible to detect water leakage between the strips in advance, and as a result, it is easy to know the parts of the seal that need to be repaired, which not only greatly improves safety, but also makes repair work much easier. It has the advantage of being

[Brief explanation of the drawing]

The figures show a trunk device for underwater work as an embodiment of the present invention, in which Fig. 1 is a side view thereof, Fig. 2 is a sectional view taken along the - arrow in Fig. 1, and Fig. 3 is a
Figure 4 is a cross-sectional view taken from the direction of the arrow in Figure 1.
5 is a view taken along the - arrow in FIG. 1. 1... Buoyancy structure, 2... Bottom underwater trunk,
2'...Side underwater trunk, 3...Horizontal buoyancy tank, 3'...Vertical buoyancy tank, 4, 4'...Work space, 5,5'...Packing, 5a, 5'a...
...Putskin strip, 6...Drain pipe, 6a...
Valve, 7... Drain receiver, 8... Partition member, A...
Compartment room, B... seam.

Claims (1)

[Scope of utility model registration request] A bottom underwater trunk is attached to the lower surface of the bottom of the buoyancy structure via a gasket, and buoyancy tanks are provided on the upper outer surfaces of both side walls along the longitudinal direction of the bottom underwater trunk. The trunk is composed of a plurality of packing strips arranged in parallel and spaced apart from each other along the longitudinal direction of the trunk, and a partition member interposed between these packing strips, and partitioned by the packing strips and the partition member. A trunk device for underwater work, characterized in that each compartment is provided with a drain pipe with a valve that communicates from the compartment to the bottom underwater trunk.