JPH041321A - Submerged unloader and float for it - Google Patents

Abstract

PURPOSE:To stably and efficiently carry out a submerged unloading works with the direct operation of divers, by providing a winch and a lifting hook under a float. CONSTITUTION:A winch 3 and a lifting hook 4 are provided under a float 2 and a plurality of anchors 5 are arranged at the periphery of a work range. This winch 3, the respective anchors 5 and the lifting hook 4 are connected by a wire rope 6. Next, power lines 11 such as a compressive air-hose or a hydraulic hose are extended to connect the winch boat 10 and the main body 1 to enable divers 13 to transfer crushed stones or the like by the lifting hook 4. Next, the whole body 1 composed of the float 2, the winch 3, and the liftinghook 4 is supported one by one by four wire ropes 6 against a plurality of anchors 5 to keep the body 1 at a specified level in the water. The float 2 can be transferred according to the instructions of the drivers 13.

Description

[Detailed description of the invention]

(Industrial Field of Application 1) The present invention relates to an underwater lifting device and a floater used therein, and is mainly used for leveling stones on the surface of foundation mounds of seawalls and breakwaters, and arranging small wave-dissipating blocks in a designed shape. This technology was developed to allow divers to operate the work underwater, improving work efficiency and reducing accidents. [Conventional technology] This technology is used for the purpose of improving work efficiency and reducing accidents. Formation is carried out by using a ship equipped with a crane to place blocks made of stone or concrete weighing between 10 kg and 2 kg into a predetermined location, and have the diver operate the winch attached to the submersible to the bottom of the water. Leveling work is being done.

[Problem to be solved by the invention]

Although this method is currently widely used, it cannot be operated directly by the diver and is operated by a winch boat based on the diver's commands, which can lead to communication errors and winch operation errors, as well as wind and waves. , The influence of swells and currents are significant, and in places with deep water (more than 10 meters), the timing of unloading to a designated location using the pendulum principle is misty. Also, in places where submersibles cannot be used, such as under a pier. There is a drawback. On the other hand, since large rubber balloons are used in salvage operations, the inventors took advantage of this while changing the air pressure inside the balloon. We considered leveling the surface of the foundation mound by lifting and moving crushed stones and blocks. As a result, when using a balloon, most of the disadvantages of the former method using a winch ship can be overcome, but new disadvantages arise when using it, especially buoyancy adjustment is difficult, and buoyancy due to water pressure difference when moving up and down underwater. It may cause a sudden rise due to fluctuations, it may be difficult to adjust to changes in the load, and in some cases it may even pose a great danger to the diver. Also,
Since balloons float in the middle, they are easily washed away by the currents in the ocean, making them difficult to use in areas with strong currents. Of course, various improvements have been made to the balloon itself, such as improving the performance of the supply and exhaust valves that respond quickly to water pressure, installing it in less dangerous locations, automatically adjusting its buoyancy, and installing thrusters to make it self-moving and able to control tidal currents. We tried making it possible to use it in a certain place or move it, but it was not a sufficient countermeasure.

[Means to solve the problem]

The present invention is an underwater lifting device developed for the purpose of safely and efficiently leveling the surface of foundation mounds using the winch boat or balloon, and its structural features are the floater (2) and its lower part. Winch equipment installed in! (3) and a lifting hook (4), the underwater lifting device has achieved its purpose. Furthermore, the main body (1) using such a balloon-shaped floater is provided with a plurality of anchors (5) installed around one working area, and each anchor (5) is installed from the winch device to the main body (1).
5) and the rope (6) that connects the lifting hook (4) to restrict the range of movement, the underwater lifting device becomes even more stable. In the present invention, we have also considered the floater itself, and have also considered the structure of the floater, which allows safe work with just the floater without restricting it with strips. The floater is made up of a hollow sealable inner case (21) mounted inside the case, and a lifting means (22) inside the outer case of the inner case. Here, a conventionally known floater (2) can be used, and a winch device (3) can be installed on it, but a winch device! (3) is pneumatically or hydraulically operated, and the power source is supplied from land or a ship. The anchor (5) may be a simple anchor (5) that weighs several tons by putting a crushed stone block or the like into a large mocco, or it may also be a large concrete block or crushed stone itself. In short, any material can be used as long as it has a load that can withstand the tensile force exerted by the cable (6) as the floater (2) moves. Also,
Each anchor (5
) can also be reinforced with a frame that ties together. Lifting hook (4
) can also be fitted with large grips called oranges in order to move crushed stone efficiently.

[Effect]

Since a winch device is provided below the floater (2) for the hollow tank that also serves as a floater, the winch operation can be performed not only from the ship but also by the diver himself, making it safe. It is also easy to operate. Furthermore, in a state where the floater (2) is restrained by multiple winches and ropes (6) within the movement range where the anchor (5) is installed and cannot float freely, the rope (6) is moved in and out of the winch. By adding , it will move stably almost horizontally. Therefore, the crushed stone can be more stably lifted and placed only by vertical movement of the lifting hook (4). The floater has a rigid outer case and an inner case, and the floater's buoyancy can be automatically adjusted by the vertical movement of the inner case, making it more stable than a soft rubber floater, and the same level of operation as a floater with position control added by a cable. Provides stability.

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic side view showing how the device is used, and FIG. 2 is a plan layout diagram showing another example. FIG. 3 is a side view of the winch device, and FIG. 4 is a bottom view thereof. As is clear from FIG. 1, the underwater lifting device of the present invention is
Floater (2) and winch device (3) installed at the bottom of the floater (2)
) and a lifting hook (4), a plurality of anchors (5) installed around the work area, and each anchor (5) and lifting hook (4) from the winch device.
It consists of a cable (6) that connects the. Winch! A power line (11) such as a compressed air hose or hydraulic hose is connected between the fj (10) and the main body (1) to the winch device (3). Divers (13) are responsible for moving crushed stones (12), etc.
Figure 6 shows the operator working to spread the crushed stone (12) placed around the foundation mound (14). Floater (2), winch device (3) and lifting hook (
4) The entire body (1) consists of a plurality of anchors (5)
In this case, the main body (1) is maintained at a predetermined height underwater by supporting each of the four anchors (5) with four ropes (6). Anchor (5) is made by putting crushed stone in a large container.
The anchors (5) can be stably fixed by using a weight of about a ton, and by holding the anchors (5) with a frame (7) as shown in FIG. 2. Floater (2) is anchor (5)
It can be moved to any desired location within the range provided by the winch device (3). The number of anchors (5) can be reduced to three or two depending on the situation and still work in the same way. Figures 3 and 4 are structural examples of the winch device I (3), in which case the base (3) is made of a rectangular hollow tank.
0) A plurality of floater (2) mounting brackets (31) are installed on the top surface, and the bottom surface is connected to the rope (6) of the lifting hook (4) in the center, the winding winch (32), and the anchors (5) at the four corners. Four winches (33) are provided for winding the service rope (6), and
A switching box (34) containing a switching valve for the power line (11) is provided. The switch box (34) can be operated directly by the diver (13) underwater using the control lever (
35) is attached to the tip of the appropriate length of glue IiA (36). Of course, it can also be operated from a land base or a ship at sea based on commands from a diver. If a large grip called an orange is used for the lifting hook (4), it is possible not only to move a large amount of crushed stone, but also to grab and move a large number of crushed stones at once. 5 to 711 show an example of a floater suitable for use in the underwater lifting device of the present invention, FIG. 5 is a longitudinal sectional view, and FIG. 6 is a sectional view taken along line A-A in FIG. 5. , FIG. 7 is a sectional view taken along line B-B. As is clear from these figures, the floater (2) is made of a rigid material such as a corrosion-resistant steel plate or FRP that can withstand a predetermined pressure. The structural features include a rigid outer case (20) with an open bottom and a hollow sealable inner case (20) installed inside the outer case.
1) and a lifting means (22) for moving the inner case (21) up and down within the outer case (20).The inner case (21) has a ballast adjustment function and is usually filled with ballast material such as seawater. It is adjusted to be weightless underwater by the inflow of water. Then, when floating the floater, the ballast water is discharged. In this case, the outer case (20) is rectangular as shown in Figure 6 and opened at the bottom, and when it is opened, a cross-shaped frame (23) as shown in Figure 7 is placed across the frame and the outer case (20) is opened. 4 square ribosid (square screws) between the top plate (24)
is rotatably upright, and a pneumatic or hydraulic rotator (25) and a Cheno sprocket are installed below one of them.
Cheno (26) between the other three Cheno sprockets
is stretched to form a lifting means (22) for the inner case (21). The inner case (21) is a square sealed tank, and the fifth.
As shown in Fig. 6, the square screw receiver (29) is placed in contact with the slide guide (27) provided on the inner surface of the outer case (20), and the square screw receiver (29) provided above and below the pipe (28) through which the square screw (24) passes. 5. Support as shown in Figure 5. Air supply/exhaust valves (15a) (15b) are provided on the top surface of the outer case (20), which are connected to the onboard near compressor (6) by an air hose (17), and are operated by a diver. A lever (35) is provided. In the floater (2) having the above structure, the upper part in Fig. 5 is the air reservoir inside the outer case (20), and the air reservoir capacity of the outer case changes as the inner case (21) moves in and out of this interior. do. The crushed stones (12) and the like are lifted by operating the upper and lower case (2I) and the supply and exhaust valves (15a) and (15b). If the buoyancy is sufficiently controlled, an artificial concrete block of approximately 1 weight can be easily moved in a state close to zero gravity. (Effects of the Invention) The underwater lifting device of the present invention is based on the diver's command or the diver's command using the winch device and hook provided on the floater and the floater tank. Because the floater is restrained and operated within a range that does not change much, the advantages of the floater are utilized, and underwater lifting operations can be carried out extremely stably and efficiently by the diver's direct operation.Furthermore, the floater itself Improvements have also been made to enable stable buoyancy control by raising and lowering the inner tank.As a result, 1. For example, the work of leveling rubble for foundation mounds such as sea walls and breakwaters, which required the most time and effort, was less susceptible to tidal currents and swells. We were able to carry out the process without any influence, ensuring safety and high work efficiency.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing how the device is used, and FIG. 2 is a plan layout diagram showing another example. FIG. 3 is a side view of the winch device, and FIG. 4 is a bottom view thereof. Fig. 5 is a vertical cross-sectional view of the floater, and Fig. 6 is a longitudinal cross-sectional view of the floater.
FIG. 7 is a sectional view taken along line AA in the figure, and FIG. 7 is a sectional view taken along line BB in the figure. (1) Main body (2) Floater (3) Winch device (4) Lifting hook (5) Anchor (6) Rope (11) Power line (14) Foundation mound (20
) Outer case (21) Inner case (22) Lifting means (32) (33) Winch or higher

Claims (1)

[Claims] 1. An underwater lifting device consisting of a floater (2), a winch device (3) and a lifting hook (4) provided below the floater. 2. A main body (1) consisting of a floater (2), a winch device (3) provided at the bottom thereof, and a lifting hook (4);
A plurality of anchors (5) are installed around the work area, and each anchor (5) and lifting hook (
4) and a cable (6) that connects the submersible lifting device. 3. A floater consisting of a rigid outer case (20) with an open bottom, a hollow sealable inner case (21) mounted inside the outer case, and a lifting means (22) for raising and lowering the inner case within the outer case.