JPS62137294A - Diving work assit ship - Google Patents

Abstract

PURPOSE:To enable pressure reduction control to be made on a diver in dry atmosphere, by a method wherein compressed air, by means of which a set pressure reduced state is produced, is fed in a seal section and a cylinder. CONSTITUTION:An expandable cylinder body 4 is attached to a hatch part on the bottom part of a seal section 2, and a ladder 5 is attached in the cylinder body 4. A compressor 7, and an engine, a motor, or a generator, adapted to drive the compressor 7, are installed on a deck D, and from the compressor 7, compressed air is fed in the seal section 2 and a repressure chamber 6 through a pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a diving work support vessel for use in deep diving work.

<Conventional technology> Conventionally, when carrying out deep diving operations, a normal submersible engineering vessel or a purge was used as a support vessel, and after the diver worked in the deep sea, the pressure was gradually reduced underwater depending on the diving time. The vessel floats to the surface or enters a simple repressurization chamber installed on the floating raft to gradually depressurize the vessel. By doing this, the Daiper can protect itself from diving disease.

<Problems to be Solved by the Invention> However, in such conventional diving work, it takes too much time to gradually depressurize and ascend to the surface after completing the diving work to get used to the atmospheric pressure environment. The problem was that being in the water was extremely exhausting, and there were always health risks. On the contrary,
There is a method in which the dialer goes up on board the ship, which is at atmospheric pressure, and then immediately enters the repressurization chamber installed on the ship and undergoes the depressurization operation.

According to this, when the pressure is suddenly reduced to atmospheric pressure, there is a risk of causing the above-mentioned health problems to the human body. Especially today,
A device has also been developed in which a high-pressure diving bell with a dipper inside is lifted onto a ship, and then docked in a repressurization chamber on board the ship to reduce the pressure. However, this has the problem that the device becomes expensive and complicated. Furthermore, a method has also been proposed in which a special device is entered underwater, transported under high pressure to a land base, and then depressurized. However, this method is not used for normal depressurization work, but is a special method used for special purposes, for example, when depressurization failure occurs for some reason, and has the disadvantage that it cannot be used universally.

This invention has been made in view of such conventional problems, and provides a simple and safe diving work support vessel in which a diver can undergo depressurization operations while remaining in a water-free sealed compartment. The purpose is to

Means for Solving the Problems> The diving work support vessel according to the present invention has a sealed compartment in the hull, an airtight chamber communicating with the deck in the upper part, and a hatch part in the bottom part. .

A cylinder with a ladder is telescopically attached to this hatch,
The structure is such that compressed air at a set pressure can be sent from the compressor into the sealed compartment including the inside of the cylinder.

<Function> The cylinder according to the present invention has a lower end opening that can be positioned at any water depth below the water surface, that is, at a water pressure position, so that compressed air can be pumped out just enough to discharge the water inside the cylinder to the outside. By feeding the inside of the cylinder and the sealed compartment by a compressor, it acts to create a desired reduced pressure situation while keeping the inside of the cylinder and the sealed compartment dry.

Therefore, the diaper can undergo depressurization operation in a dry atmosphere.

<Embodiment of the Invention> An embodiment of the invention will be described below with reference to the drawings. 1st
Figures 1 and 2 show a barge 1 as a hull showing one embodiment of this invention, and approximately in the center of this barge 1 is a sealed section 2 having a structure that can withstand at least a pressure of about 0.6 kg/rxr. It is provided. At the entrance/exit to the deck of the barge 1 in this sealed compartment 2, an airtight room 3 is provided which is used as an entrance/exit for underground box construction and the like. In addition, around the hatch provided at the bottom of the sealed section 2, there is a
A hatch cover (not shown) is provided that can be sealed using fasteners such as the following. Furthermore, a telescopic cylinder 4 that can extend downward by 4 to 5 m from the bottom of the ship is attached to the hatch, and a ladder 5 is installed inside this cylinder 1. 6 is a repressurization chamber installed independently within the sealed section 2.

A compressor 7 and an engine, a motor, or a generator 1Rbl for driving the compressor 7 are installed on the deck, and compressed air is sent from the compressor 7 into the sealed section 2 and the recompression chamber 6 through a pipe. It acts like this. Additionally, a control room 8 is installed on the deck, where depressurization operations are performed using the various machines and facilities mentioned above.

Next, the operation of the diving support vessel will be explained.

Now, when diving with a diver is carried out for a long time and the diver attempts to ascend to the surface after completing one task, a depressurization process is required. Usually, the pressure that requires the longest decompression is 0.3
kg/rr? (corresponding to a water depth of 3 m).

First, before starting the depressurization work as described above, the compressor 7 is driven by a command from the control room 8.
While sending compressed air into the sealed compartment 2, the diver enters the sealed compartment 2 from above the deck through the airtight room 3, attaches appropriate diving equipment here, and travels along the ladder 5 inside the cylinder 4.
It descends into the water and performs underwater work at a work position at a predetermined depth. At this time, the lower part of one cylinder 4 is extended below the bottom of the ship so that it is 3 m or 6 m below the water surface.

Therefore, if compressed air is sent from the compressor 7 into the sealed section 2, the lower end of the cylinder 4 will be 3 m below the water surface.
When the pressure exceeds 0.3 kg/m, air blows outward from the bottom of the cylinder 4, and when the bottom end of the cylinder 4 is 6 m below the water surface, the pressure becomes 0.6 kg/rd. When the air blows in the same way. In such a blowing situation, although the inside of the cylinder 4 is in a dry state,
Expected 0.3 kg/rr? , 0, 6k
maintained at a pressure of g/m.

Therefore, when the above-mentioned underwater work is completed and the diper rises to the surface, the diper first holds on to the above-mentioned ladder 5 and moves into the cylinder 4.
Attach the lower end, then move upward through the compressed air to the sealed section 2, remove the diving equipment within this sealed section 2, and begin the necessary depressurization process.

In this case, if the lower end of the cylinder 4 is 6 m below the water surface, the time equivalent to the pressure of 0.6 kg/rrr will be within the sealed section 2 during the necessary decompression work corresponding to the diver's diving depth and diving time. It is possible to rise to
Similarly, if m is 0, 3 kg/n? It becomes possible to rise into the sealed compartment 2 in a time corresponding to the pressure of . As a result, 0.6kg/rr in the decompression process? Yao, 3kg/
rT? Although the time required under the pressure of The barge 1 can be moved while

In addition, at this time, when the lower end of the cylinder 2 is 6 m below the water surface, when the pressure reduction at a pressure of 0.6 kg 1 rl is completed, the cylinder 2 is further shortened so that the lower end of the cylinder 2 is 3 m below the water surface, The pressure is reduced to 0.3 kg/m, but if this is not possible due to restrictions on the number of dialers, the pressure may be reduced to 0.3 kg/d in the repressurization chamber 6. Ventilation during these depressurization processes is performed, in principle, by overflow of compressed air from the lower end of the cylinder 2.

<Effects of the Invention> As detailed above, according to the present invention, a telescopic cylinder with a ladder is provided in series at the bottom of the sealing compartment, and inside the sealing compartment and inside the cylinder, there is a cylinder that is important for the dialer. By having a configuration that sends compressed air that creates a set decompression situation, the Diaper has the effect of allowing you to comfortably and safely put on and take off diving equipment and adjust your physical condition while receiving the specified decompression in a dry environment. It is something that can be done.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of a diving work support vessel of the present invention, and FIG. 2 is a plan view thereof. 1. Hull, 2. Sealed compartment, 3. Airtight room. 4. Cylinder, 5. Ladder, 6. Recompression chamber, 7. Compressor.

Claims (1)

[Scope of Claims] 1) A sealed compartment is provided inside the hull, an airtight chamber is provided at the top of the sealed compartment for accessing the sealed compartment from the deck, and an airtight chamber is provided at the bottom of the upper sealed compartment. A diving work support vessel characterized in that a cylinder with a ladder is telescopically attached to the formed hatch part, and a compressor for supplying compressed air to the sealed compartment is installed on the deck. 2) The diving work support vessel according to claim 1, wherein the pressure of the compressed air supplied into the sealed compartment is set according to the degree of expansion and contraction of the cylinder.