JPS6080996A - Dry machining device for underwater structure - Google Patents

Abstract

PURPOSE:To eliminate the need for providing means of disposing various gases which are generated due to a welding operation, etc., make an operation easier, and improve safety, by providing flexible and airtight handling gloves and a sight glass close to the gloves, on a cover body, which covers an underwater structure from above and forms an air chamber inside. CONSTITUTION:A pressurized air is introduced in a cover body 4 by closing a valve 7 and opening a valve 6, and the weight of a weight 5 is kept controlled so as to slightly surpass the buoyancy under this condition, and the cover body 4 is put over a casing pipe 1 to cover it. After that, the pressurized air is reduced bit by bit by slightly opening the valve 7, to reduce the buoyancy of the cover body 4 and stabilize it, within a scope that the water level does not reach the top face opening 1a of the pipe 1. Thereby an operator can outwardly hold a welding rod 11 and a welding holder 12 previously prepared in the cover body 4, through handling gloves 9, to weld a blind plate 2 for closing the top face opening 1a of the pipe 1 and seal up the pipe 1, while watching the inside through a sight glass 10. Accordingly, it is not necessary for an operator to enter the air chamber in the cover body, while eliminating the need for providing means of disposing various gases to be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a form that can be covered from above, such as a casing pipe of an abandoned well and cut near the seabed, or the head of an underwater pipe for an offshore structure. Regarding dry processing equipment, it is possible to perform processing operations such as welding on underwater structures under the same conditions as on land by forming an air chamber around them. Contains information that can be performed using the following operations.

As a dry processing apparatus for underwater structures, the one described in Japanese Patent Publication No. 1983-37449 related to the applicant's earlier proposal is known. This is to form an air chamber around the local area to be machined, and since the upper part of A is attached to the underwater fI structure itself, it may not be possible to attach it to the underwater structure, or if the local area to be processed is Cannot be used near the top of an underwater structure.

Furthermore, even if this problem could be solved, the conventional dry processing equipment described above is constructed on the premise that the operator enters the air chamber to perform the work. It is necessary to ensure the safety of workers by taking measures to dispose of vaporized gas.

The present invention solves the above-mentioned conventional disadvantages. It is designed to eliminate the need for various gas treatment methods, and can be applied to underwater structures where the local part to be processed is on the top or where it is difficult to find a place to install the equipment, and also eliminates the need for treatment methods for various gases generated during work such as welding. The purpose is to provide a dry processing device for underwater structures.

For this purpose, the present invention includes a cover body that covers an underwater structure from one side to form an air chamber therein, and an anchor part that supports the cover body on the bottom of the water. 1
= The main body of the power distribution bar is provided with a flexible, airtight operating glove that can be inserted from the outer periphery and protrudes inward, and a viewing window that is placed near the glove.

Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.

In Fig. 1, reference numeral 1 is a casing pipe for a seabed mining well that was cut off near the seabed.A blind plate 2 was welded and fixed to the soil surface opening 1a of this pipe 1 to seal the inside ( A dry processing device 3 for underwater structures according to the present invention is arranged.The dry processing device 3 has a bottomless box shape and is breathable.

The cover main body 4 is prevented from water permeability, and is mainly composed of an anchor part 5 connected to a predetermined lower part of the cover main body 4. In this embodiment, the anchor part 5 is attached to the seabed surface. It is composed of a weight 5a that touches the ground, and a row 15b that connects the weight 5a and the cover body 4 to support the buoyant force that the cover body 4 receives.

In addition, the second distribution valve main body 4 is equipped with a valve Ic for introducing air into the F and a valve 7 for discharging the internal pressure air. 8 to a pressurized air supply device r″l (not shown).

Here, the cover main body 4 is provided with operating gloves 9 made of a material that is both breathable and water permeable and has flexibility, and a viewing window 1o in the vicinity thereof. In this case, it is arranged at the center of the upper surface of the cover main body 4. This operation glove 9 has a proximal end that is airtight through an appropriate sealing member in an insertion opening 4a that opens on the top surface of the cover main body 4.
It is a long glove-like item that is connected in a watertight manner and protrudes inside the cover body 4 so that an arm can be inserted from the outside of the cover body 4. And the arm portion 9a of the operating glove 9
is formed into a bellows-like cross section and is able to expand and contract or bend freely. The diameter of the insertion port 4a is approximately twice the diameter of the worker's arm, allowing freedom of movement of the arm during work. Therefore, such operation gloves 9
A pair of left and right gloves are provided, and a viewing window 10 formed by fitting waterproof glass or the like is provided at a position where the face of the operator faces with both arms passed through the operating gloves 9. In FIG. 1, reference numeral 13 is a welding ground cord connected to the casing pipe 1, and 14 is a power supply cord connected to the welding holder 12.

In the above configuration, by listening to the valve 6 with the valve 7 closed, pressurized air is introduced into the cover main body 4, an air chamber is formed inside, and buoyancy is generated in the cover main body 4.

Therefore, first, pressurized air is introduced into the cover body 4 to almost full capacity, and the weight of the weight 5a is adjusted so as to slightly overcome the buoyant force that the cover body 4 receives in this state. is placed over the casing pipe 1 from above so as to cover it. In this case, -h of casing pipe 1
It is preferable that the distance between the surface opening 18 and the upper surface of the cover main body 4 is approximately 40 cm in consideration of workability using the operating gloves 9. For this purpose, the length of the row 15b may be adjusted or Instead, the height of the seabed surface where the weight 5a touches the ground should be adjusted by digging. Thereafter, the pressure air is gradually reduced by slightly increasing the valve 1, and the buoyancy of the cover main body 4 is reduced to the extent that the water surface does not reach the upper surface frontage 1a of the casing pipe 1, thereby stabilizing the cover main body 4.

By doing so, the area around the upper surface of the casing pipe 1 to be welded is kept in a dry atmosphere. Then, the diver as an operator passes the welding rod 11. Grasp the welding holder 12 from the outside of the cover main body 4 through the operating gloves 9, and while looking into the inside through the viewing window 10, weld the blind plate 2 that closes the top opening 1a of the casing pipe 1 to seal the inside. (See Figure 2).

FIG. 3 shows another embodiment of the present invention, in which the cover body 4 is bell-shaped and made of a waterproof sheet, and the operating gloves 9 and the viewing window 10 are provided on the circumferential surface of the cover body 4. The structure is substantially the same as that of the embodiment shown in FIGS. 1 and 2 except for the arrangement. In this case, the worker does not have to bend down (there is an advantage that the worker can work in a relatively comfortable standing position).

6. The 7J cover main body 4 shown in FIG. 3 can also be made of transparent acrylic resin or transparent vinyl, and since the platform is made of transparent material, the entire body functions as a viewing window. .

What is shown in FIG. 4 shows still another embodiment of the present invention,
In this embodiment, part of the anchor is made of cement block.
The structure differs from that of the previous embodiment in that it is constructed with legs 16 made of angle members or the like connected to the body, but other than that, the structure is substantially the same as that of the embodiment shown in FIG. In this embodiment, since the part of the anthorn is rigid and can support not only the floating of the cover body 4 but also the downward load and lateral load, the cover body 4 may be displaced laterally due to the influence of the tidal current. Work such as welding and painting can be carried out reliably in a stable working posture without causing any damage or moving downwards due to the weight of the worker.

As explained above, according to the present invention, the main body of the cover in which the air chamber is formed covers the underwater structure from above and is held in that position by the part of the anchor that supports and covers the underwater structure. For underwater structures where the private parts are on the top or where it is difficult to get a place to install equipment, processing operations such as welding and painting can be performed in a dry atmosphere in almost the same way as on land. Not only can it be used for various +
a-fees. Tools can be grasped and operated from the outside of the cover body, and since a viewing window is provided near the operating gloves, machining operations can be carried out while visually checking the hand and local parts of the workpiece. Therefore, the operator does not have to enter the air chamber inside the cover body to work, and therefore, there is no need for means for processing gases generated during welding and painting operations.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing one embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a schematic side view of another embodiment, and Fig. 4 is a schematic front view of still another embodiment. It is. 1...Casing pipe, 1a...Top opening, 2.
... Persecution root, 3... Dry processing device 14... Cover body, 5... Part of anchor, 5a... Weight, 5b...
...Rope, 6.1...Valve, 8...Hose, 9
...Operating gloves, 10...Peeping window, 11...Welding rod, 12...Welding holder, 13...Welding ground cord, 14...Power supply cord, 15...One T-ite, 1
6...legs. Patent Applicant Yasushi Hayakawa Agent Patent Attorney Nobu Kobashi Ukiyo Patent Attorney Susumu Toshii -〇-

Claims (1)

[Claims] It comprises a cover body that covers an underwater structure from above and an air chamber is formed inside, and a part of an anchor that supports this cover body on the bottom of the water, and can be inserted into the cover body from the outer circumferential side. An underwater structure dry processing device characterized by being provided with a flexible, airtight operating glove that protrudes inward, and a viewing window placed near the glove.