JPH0867295A - Underwater window structure - Google Patents

Abstract

PURPOSE: To provide an underwater window structure excellent in also water- tightness while markedly reducing mounting man-hours can be attained in the case of mounting an underground window in a main unit outer plate of hull, underwater observatory tower, etc. CONSTITUTION: In the case of mounting an underwater window in an underwater part of a ship body or underwater structure, an underwater window frame 7 is formed of material which can be welded to a main unit 6 of the hull or the underwater structure, to fix the underwater window frame 7 to the main unit 6 by welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater window structure for underwater observation towers, underwater sightseeing boats, submersibles and the like used for observing fish in the sea and the condition of the seabed.

[0002]

2. Description of the Related Art In a conventional underwater window, as shown in FIG. 6, a mounting bolt hole 13 is formed in an underwater window frame 7 in a factory, while a transparent plate 5 such as a glass plate is packed or sealed.
After attaching the holding frame 9 with the screw 10 via the, the watertightness-tested one is attached to the bolt hole 13 of the underwater window frame 7 at the installation site on the body such as the hull, and the body outer plate 6 is holed. In general, the through bolt 8 is passed through this, the packing or the sealing material 12 is inserted, and the nut 15 is tightened for attachment.

[0003]

When the hull is made of FRP, it is easy to make holes in the hull, but when the hull is made of steel and has many underwater windows such as underwater sightseeing boats and submersibles, or steel. When the thickness of the outer plate is 6 to 20 mm, like the underwater observation tower in
For mounting underwater windows, it is necessary to align a number of holes with the holes in the underwater window frame and drill one hole in the almost vertical outer plate with high accuracy at the hull construction site where the scaffolding is poor, It takes a lot of time and costs a lot to install. The underwater window frame is produced in the factory, it can be mechanically drilled, its dimensions are accurate, and it does not take much effort. In addition, the bolt mounting type is not only a problem of mounting man-hours, but it is necessary to secure the watertightness of the bolt penetration part, and the watertightness of the window frame and the glass part is completely machined at the factory after packing and sealing etc. Water-tightness can be ensured and the water-tightness test is easy, but great care must be taken to ensure water-tightness during on-site construction such as bolt penetrations.

The present invention has been made in order to overcome such a conventional problem, and an object of the present invention is to significantly reduce the mounting man-hours for mounting an underwater window to a body outer plate such as a hull or an underwater observation tower. Another object of the present invention is to provide an underwater window structure which is excellent in water tightness.

[0005]

That is, the underwater window structure of the present invention is capable of welding the underwater window frame to the main body of the hull or the underwater structure when attaching the underwater window to the underwater portion of the hull or the underwater structure. As a material, the underwater window frame and the main body are fixed by welding.

[0006]

[Operation] As described above, the underwater window frame is made of a material that can be welded to the main body of the hull or underwater structure, and the underwater window and main body are fixed by welding, thereby significantly reducing the number of installation steps. Water resistance is also improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In addition, although this embodiment describes an underwater window structure of an underwater sightseeing boat, the configuration and effects are the same for a submersible boat and an underwater observation tower. In FIGS. 2 and 3, reference numeral 20 denotes an underwater sightseeing boat, an underwater window 1 provided under the water surface A, a buoyancy tank 2, an observation room 3 which is higher than the buoyancy tank 2, and an engine provided at the rear of the observation room 3. The room 4 is provided so that even if the underwater window 1 is damaged and the observation room 3 is flooded, it does not sink below a certain level.

The underwater window 1 is constructed as follows. The underwater window frame 7 includes a holding frame 9 and a holding frame fixing screw 10.
Thus, the transparent plate 5 made of glass or acrylic is kept watertight through the packing or the sealing material 11. Up to this point, the process is the same as the conventional one. The underwater window frame main body 7 is welded to the steel outer plate 6 of the hull so that the underwater window frame collar 7'is welded to the welded portion 1.
It is fixed by welding at 4. The welded portion 14 is welded in the factory without the packing or the sealing material 11 and the transparent plate 5 or the like, so that there is no problem, and this portion may not be welded but may be an integral structure. The length D of the underwater window frame collar 7'is made long to some extent, and a packing or a sealing material 11 and a transparent plate 5 are attached to the body outer plate 6 at the outer welded portion 16 at the tip of the underwater window frame collar 7 '. Welding is installed as it is. Since the packing or seal portion 11, the transparent plate 5 and the like are windows that have been mounted at the time of factory assembly and tested after watertightness, there is no problem in watertightness of this portion, and the rest is watertightness of the mounting portion. If this is welded,
Watertightness is perfect. In FIG. 1, B is the seawater side, and C is the observation room side. However, in the case of welding attachment, it is necessary to prevent the heat during welding from adversely affecting the packing 11 and the transparent plate 5, and the length D of the window frame collar 7 ′ and the overlapping distance with the outer panel 6 of the main body. E, the distance F from the outer plate 6 to the underwater window frame 7, and the distance G from the outer weld 16 to the packing 11
In addition, it is necessary to carefully determine the welding leg length and welding sequence of the outer close contact portion 16, the welding leg length and welding sequence of the inner welding portion 17, and the like. The leg length of welding differs depending on the plate thickness of the welded portion and the required strength, but basically, if the leg length is large, it takes a long welding time and the input heat also becomes large.

Therefore, in the present invention, the following findings were obtained as a result of welding experiments with various changes made to the above items. That is, D ≧ 30 mm, F ≧ 15 mm, E is about 15 mm, G is about 4
7mm, leg length of external weld 16 is 5mm, and welding sequence is 50
% The length and the diagonal part are alternately welded. The leg length of the internal welded portion 16 is 5 mm, the welding sequence is 50 mm long, and the diagonal portions are alternately welded. Since the leg length of the internal welded portion 17 is close to the packing portion, the leg length is 3 mm, and under the above conditions, the holding frame 9 and the underwater window frame 7 are provided.
It was decided that the temperature would be 70-80 ° C. It has been found that the heat resistance temperature of the packing material and the sealing material currently used is 100 ° C., and there is no problem in this mounting method, and the watertightness of the packing and the like is not deteriorated. Further, in this method, since the main body outer plate 6 and the collar 7'are overlapped by the distance E, it is easy to perform the work at the time of temporary attachment at the time of installation, and the accuracy of the cutout hole of the underwater window mounting portion of the outer plate 6 is improved. Even if it is a little bad, the work is easy because the distance at the bottom only increases or decreases. In addition, since water is welded at two locations, the outer welded portion 16 and the inner welded portion 17, watertightness is also perfect. Also, by placing the overlapping window frame collars 7'on the undersea side, it is safe against the undersea pressure from the outside. The same thing can be said for the presser frame 9.

Next, FIG. 4 shows a model in which the outer panel 6 of the main body and the window frame collar 7'are butt-welded with the same surface. It is possible to make it smaller and the propulsion resistance is reduced. Next, FIG. 5 is characterized in that, when the underwater window frame 7 is welded, the distances D and G between the welded part and the packing 11 and the like are projected to the underwater side. The protrusions provide resistance to water flow, but this is not a problem for low speed ships. As an advantage, it is possible to reduce the distance between the underwater windows 1 and 1. That is, FIG. 1 and FIG.
In this case, the distance between the windows D and G should be twice or more as the window interval, but in the case of the present invention, the window interval may be small, which makes it possible to install many windows at small intervals. Also, in FIG.
In FIGS. 4 and 5, water, the material of the window frame body 7 and the window frame collar 7 ′ may basically be weldable to the body outer plate 6, and when the outer plate 6 is made of steel. The underwater window body 7 and the brim 7'may be made of steel, stainless steel, or other steel. When the outer plate 6 is an aluminum alloy, the materials 7 and 7'are made of a material such as aluminum that can be welded to the outer plate. In general, in seawater, if different metals having different ionization tendencies are adjacent to each other, electrical corrosion occurs. Therefore, the window frame and the like are preferably made of the same material as the outer plate.

[0011]

As described above, according to the present invention, the underwater window frame is made of a material that can be welded to the body of a hull or an underwater structure, and the underwater window frame and the body are fixed by welding. Compared with this, the number of man-hours for mounting the underwater window can be greatly reduced, and the watertightness is also greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an underwater window structure according to the present invention.

FIG. 2 is a side view of an underwater sightseeing boat having an underwater window according to the present invention.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view showing another embodiment of the underwater window structure according to the present invention.

FIG. 5 is a sectional view showing still another embodiment of the underwater window structure according to the present invention.

FIG. 6 is a cross-sectional view of a conventional underwater window structure.

[Explanation of symbols]

 1 Underwater window 6 Skin 7 Underwater window frame

Claims (6)

[Claims] 1. When attaching an underwater window to the underwater portion of a hull or underwater structure, the underwater window frame is made of a material that can be welded to the body of the hull or underwater structure, and the underwater window frame and body are fixed by welding. Underwater window structure characterized by doing. 2. The underwater window structure according to claim 1, wherein a brim is provided on the underwater window frame, and the brim is arranged on the underwater side of the main body and fixed by welding. 3. The underwater window structure according to claim 1, wherein the flange provided on the underwater window frame and the main body are abutted and welded to each other without overlapping. 4. The underwater window structure according to claim 1, wherein the underwater window frame is installed so as to project to the underwater side, and the collar and the main body attached to the underwater window frame are fixed by welding. 5. The underwater window structure according to claim 1, 2, 3 or 4, wherein when the main body is made of steel, the material of the underwater window frame is made of steel or stainless steel and fixed by welding. 6. The underwater window structure according to claim 1, wherein the distance from the welded portion of the underwater window frame and the main body to the packing for keeping the transparent plate of the underwater window watertight is 30 mm or more.