JPS59179494A - Working ship - Google Patents

Abstract

PURPOSE:To perform automatic removal of oceanic product adhered to the sides, by a method wherein an electromagnet absorbing device is absorbed to a ship hull to position a working ship, and a rotary cutter is operated. CONSTITUTION:An electromagnet absorbing device 8 is installed to the forward end of an arm member 7 rockably located on a deck 6 of a working ship 5, and an adhered matter removing device 4 having a rotary cutter is installed to the forward end of an arm member 14. This causes absorption of the electromagnet absorbing device 8 to a ship hull 1 to position a working ship 5, and enables automatic removal of oceanic products, such as barnacles, oysters, adhered to the ship hull with the aid of the adhered matter removing device 4.

Description

[Detailed Description of the Invention] This invention is directed to the prevention of marine organisms (-
1 Relating to a work boat used for removing kimonos.

2. Description of the Related Art As offshore structures such as offshore plants and offshore work platforms, bottom-mounted structures that are fixedly installed on the seabed and floating structures that are installed floating on the sea surface are known. In this type of offshore structure, the outer surface of the structure below sea level is
Because it is constantly submerged in seawater, it is subject to corrosion and at the same time serves as a breeding ground for marine life. ? fηIf the water flow rate is 3 knots or more, F, it becomes physically difficult for the larvae of marine organisms to attach.
When the structure is stationary, such as a marine structure, larvae of marine organisms easily attach to it, and attached larvae do not easily detach. The main organisms that breed by adhering to marine structures include, for example, animals such as barnacles, serpulae, molluscs such as woolly beetles, sea squirts, oysters, and wild carp, and plants. There are seaweeds such as green algae and brown algae. In particular, species such as Fujibo, Serpura, Cucumber beetles, and Ulva are very active, and their attachment to marine structures can cause the following problems. Because kimono increases the frictional resistance between the structure and the seawater, a tugboat with high horsepower is required when towing the structure, and the towing speed decreases, making it difficult to maintain speed. Therefore, fuel consumption increases significantly. In addition, the deposits damage the coating of the structure, greatly accelerating corrosion. For this reason, conventionally, the work of manually scraping off the deposits using a scraper has been carried out periodically. On the contrary, the removal of deposits using a scraper is generally difficult and inefficient, and requires a lot of manpower and time, making removal of deposits a major problem in the maintenance of offshore structures.

An object of the present invention is to provide a work boat that can easily and efficiently remove special features of marine structures.

The work boat according to the present invention is equipped with a hull positioning device for positioning the hull by adsorbing marine structures, and a deposit removal device having a rotary cutter for removing deposits.

According to the work boat of the present invention, objects on the marine structure can be easily and reliably removed using the rotary cutter for removing deposits while the hull is positioned relative to the marine structure using the hull positioning device. I can do it. Further, since the cutter scrapes off the deposits while rotating, the deposits can be removed very efficiently.

The present invention will be described in detail below with reference to the drawings.

The drawing shows a work boat carrying out work to remove deposits (2) from an offshore structure (1), and this boat is equipped with a hull positioning device (3) and an object removal device (4). We are prepared.

The hull positioning device (3) consists of two sets of manipulators (6) installed on the upper deck (6) on both sides of the front of the hull (5).
magic hand) (7), and two sets of electromagnetic suction cups (8) each mounted on the tip of each manipulator (7).
). Each manipulator (7) is attached to a swivel base (9) mounted on the upper deck 6) so as to be able to rotate in a horizontal plane, and to the swivel base (9) so as to be able to rotate around a horizontal axis. The first arm (10) has a first arm (10) which is attached to a horizontal axis, and the first arm (10) has several angles which are attached to the first arm (10) so as to be able to rotate around a horizontal axis.1. A suction cup 8) is attached to the tip of the second arm (11) via a ball joint (12). Although not shown, air cylinders are appropriately placed at the connecting parts of the swivel table (9), arms (10) (11), and suction cup (8), and these cylinders are operated appropriately. The suction cup (
8) A: The device and its posture can be changed arbitrarily. Although not shown, the electric wire for driving the suction cup (8) is led along the manipulator (7) to the hull (5).

Also, when not working, the positioning device (
3) is the upper deck (6) as shown by the chain line in Figure 2.
It is stored in a folded position.

In the part between the positioning device (3) on the front end surface of the hull (5),
Two cutouts (13) spanning the entire height of the hull (5) are provided (
is being pulled. Two sets of manipulators (14) are provided on the upper deck (6) immediately after these notches (13),
A two-phase deposit removing device (4) is attached to the tip of each of these manipulators (14). Each manipulator (14) has a first swivel base (15) mounted on the upper deck (6) so as to be able to rotate within a horizontal plane, and a first swivel base (15) that is mounted on the upper deck (6) so as to be able to rotate in a horizontal plane. 15) Toriiq
(Attach the pulled first arm (1G) to the 17th gnome (16) so that it can rotate around the horizontal axis. (The pulled second arm (11) rotates around the horizontal axis.) The third arm (17) is attached to the second arm (17) so that it can be
8), and a second swivel base (18) attached to the tip of the third arm (18) so that it can rotate around an axis perpendicular to the third arm (18).
19), and the second swivel base (19) is attached to the second swivel base (19).The first swivel base (15) and the arm (1G> Although not shown, air cylinders are appropriately arranged in the connecting part, and by appropriately operating these cylinders and rotating the swivel bases (15) and (19), the deposit removal device ( The position and posture of 4) can be changed arbitrarily. 3. When the kimono removing device (4) and its manipulator (14) are not being used for kimono removal, the f.J. kimono removal device (4) and its manipulator (14) are shown in chain lines in It is stored in a folded position on the upper deck (6) as shown.

Each dirty food removal device (4) includes a watertight case <20) fixed to the second swivel base (19) of the manipulator (14), an air motor (21) fixed within the case (20>), The case (20) is connected to the tip of a motor shaft (22) which is rotatably and watertightly received at the tip of the case (20).
Inner cutter drive shaft (23) that protrudes forward from 0)
, an inner cutter (24) for removing deposits fixed to the tip of this shaft (23), and a key (not shown) that does not rotate relative to the inner drive shaft (23) but can move in the axial direction. An outer cutter drive shaft (25) is attached to the front outer side of this shaft (23) via a An outer cutter (2G) for removing deposits is rotatably and axially movably attached to the outside of the inner drive shaft (23) after the outer drive shaft (25), and is attached to the rear end of the outer drive shaft (25). An outer cutter moving part +J (27) attached to Jζ that can rotate and slightly move in the axial direction, an air cylinder (28) that moves and fixes the moving member (27) relative to the inner drive shaft (23), A cup-shaped cover (29) with an open front fixed to the movable member (27) so as to cover the circumference of the cutter (26), and a jet water jet that spouts diene 1-water from the tip of the inner cutter (24). Device(
30).

The front end of the case (20) has a cylindrical lid (
The rear end of 31) is fixed in a watertight manner, and this lid (3
1), the rear end of a T-shaped tube (32) constituting a part of the ejection device (30) is fixed in a watertight manner, and a disc-shaped lid (33) is attached to the front end of this tube (32). is fixed in a watertight manner.The inner drive shaft (23) is connected to the lid (31) <3
3) and T-shaped pipe (32), full penetration L/, 伶 (31)
(33) It is rotatably and watertightly received at both front and rear ends of J5J=HiT'd (32).

The movable member (27) has a cylindrical shape with front and rear openings, and a wall (34) that is rotatably and axially movably fitted to the outside of the inner drive shaft (23) is integrally formed at the inner middle part of the movable member (27). ing. The air cylinder (28) is attached to the disc-shaped lid (33) at the front end of the single-shaped tube (32), and its piston rond (35) is mounted on the intermediate wall (34) of the moving member (27). . A flange (3G) projecting outward is integrally formed at the rear end of the outer drive shaft (25), and this flange (36) is fitted into the front inner side of the moving member (27) so as to be rotatable and axially movable. It is being A flange-shaped stopper (37) extending inward is fixed to the front end surface of the moving member (27), and the outer drive shaft (25) t, that is, the flange (3
G) can be moved slightly in the axial direction between the intermediate wall (34) and the stopper (37) with respect to the movable member (27). Inside cutter (24) JL? and the outer cutter (26) each have four twisted blades (38).
(3≦)) is formed. The blade (39) of the outer cutter (26) protrudes forward to the outside of the inner cutter (24), and is twisted in a direction that receives (pulls) a backward force by rotating the water flow forward. .Cylinder (28)
The movable member (27) can be moved in the axial direction and fixed at any position relative to the inner drive member (23). And moving part IJ' (27)
When the tip of the outer cutter (26) is at almost the same position as the tip of the inner cutter (24) or at a point further forward than this, the edge of the outer cutter (26) is at the same position as the tip of the inner cutter (24). position, and when the movable member (27) is moved to the rearmost position, the tip of the outer cutter (26) is positioned far back than the tip of the inner cutter (24), as shown by the chain line in the figure. It has become.

The ejection device (30) is configured as follows. That is, a plurality of forward-facing diene 1 to water spout ports (40) are provided at the tip of the inner cutter (24), and the inner cutter (24)
4) and inside the inner drive shaft (23), there is a spout (4).
A wooden passageway (41) (42) leading from the inside of the pipe (32) is formed. A jet water supply pipe (44) is connected to the remaining end of the T-shape (32) via a valve (43). A jet water supply pipe (44) and air supply pipes (not shown) for the air motor (21) and air cylinder (28) are led along the manipulator (14) to the hull (5).

The front part of the cover (29) is formed into a cylindrical shape, and a flange (
45) are integrally formed.

A plurality of circumferentially long guide holes (4G) are formed in this flange (45).

In addition, on the outside of the front cylindrical part (47) of the cover <29),
The lower part is removed and the cylindrical sliding body (48) is movable in the axial direction.
A plurality of telescopic winds (49) are integrally formed at the front end of the cover (29) and protrude forward through the guide hole (46). The rear end of the sliding body (48) has an outwardly extending 7
A lunge (50) is integrally formed, and these seven lunges (50) are integrally formed.
) and the flange (45) of the cover (29), there is a claw (
A plurality of tension coil springs (51) are installed to force the spring (49) forward. And the sliding body (4
8) When the cover phase (51) is moved to the frontmost position, the tip of the claw (49) is located slightly forward of the tip of the outer cutter (26), and the sliding body (48) is pressed against the spring (51). When the claw (49) is moved to the rearmost position against the force, the tip of the claw (49) is located considerably further back than the tip of the outer saw blade (26). Cover (at the bottom of 29〉) Clothes JJ
I exit (52) is installed, and this I exit (52)
At the lower end of the kimono discharge pipe (53) connected to the outside of the
The upper open end of the bag (54) is removably removed. Also, a lid (55) that can be opened and closed is attached to the lower end of this bag (54).
) has been taken.

Although not shown, the hull (5) of the workboat is equipped with drive control devices such as a hull positioning device (3) and a kimono removal device (4), which are used to control the operation of the workboat and the hull. Positioning device (3) and (q kimono removal device (4)
Control is performed by wireless remote control.

The work of removing deposits by the above-mentioned work boat is carried out, for example, as follows.

First, the work boat is moved near the offshore structure (1) where the boat (2) is located, and by appropriately operating the manipulator (7) of the hull position adjustment device (3), the suction 518 (8
) to position the hull (5) relative to the structure (1) by adsorbing the outer surface of the structure (1).

Next, the manipulator (14) of the garment removal device (4)
Properly operate the cutters (24) (26) to face the outer surface (2) of the structure (1) that is to be submerged below the sea surface, and then the cutters (24) (26) are moved by the motor (21). Rotate and run. At first, the outer cutter (26) is moved back from the inner cutter (24) as shown by the chain line in Fig. Press down and scrape it off, then use the inner cutter (24)
Once it reaches the outer surface of the structure (1),
Step back to the outside of the kimono (2). The thickness and hardness of the deposit (2) can be determined from the pressing force of the inner cutter (24) at this time.

Next, the outer cutter (2G) is advanced to almost the same position as the inner cutter (24), and the tip of the claw (49) of the cover (29) is pressed (pulled) against the deposit (2) while rotating. Push both cutters (24) and (26) into the deposit (2) and scrape it off.At this time, (=J kimono (2)
) Depending on the thickness and hardness of the cutter (24) (2B)
That is, the rotation speed of the motor (21) is adjusted. Cutter (
24) When (26) moves forward while scraping off (vI kimono (2)), the saw blade (29) also moves forward, but the claw (49) is stuck to the attachment around the cutter (24>(2G>). It is pressed (pulled) onto the kimono (2) and stopped.Then, the deposit (2) scraped off by the cutters (24) and (26) is not scattered outside the cover (29). , from the cover (29) outlet (52) to the 1st port (5
3) and falls into the collection bag (54).The cutter (2)
4) When (2G) reaches the outer surface of structure (1), move them appropriately and cut both cutters (24).
(26)" As above, the surrounding deposits (2)
Scrape it off. Even when scraping off the sea urchin (=I kimono (2)), the outer cutter (26) is moved by the movable member (27).
) 71-The inner cutter (24) can move slightly in the axial direction with respect to the inner cutter (24), and the outer cutter (26) sends a water stream forward by rotation and receives a backward force, so the inner cutter (24) Even if the outer cutter (26) reaches the outer surface of the structure (1), the outer cutter (26) will not be strongly pressed against the outer surface of the M4 structure (1), and there is little risk of damaging the paint film on the outer surface of the structure (1).

Also, cutters (24) and (26) are used to make kimonos (i).
While the kimono (2) is being scraped off, jet water is jetted from the tip of the inner cutter (24) by the jetting device (3o) to blow away the scraped off kimono (2).

In this way, the scraped deposits (2) will not be caught between the outer surface of the structure (1) and the cutter (24) (2G), and the paint film on the outer surface of the structure (1) will be damaged. This further reduces the risk of In addition, by jet water injection, (
4 The kimono (2) can be locally peeled off, and the scraped off deposits (2) can be blown away from the roots.

In addition, by spraying jet water while the cutter (24> (26)) is stopped, the scraped and deposited material (2) can be blown away.Also, the collection bag (55) When the bag (2) is full of deposits (2), move the deposit removal device (4) onto the hull (5), remove the lid (55) and empty the bag (54). Repeat the process again.

After removing a certain part of the object (2), remove the suction cup (8) of the hull positioning device (3) from the offshore structure (1), and then move the work boat appropriately. , perform the removal work of the deposits (2) on other parts in the same manner as above.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of a work boat with the intermediate portion omitted, Fig. 2 is a sectional view taken along line ■-■ in Fig. 1, and Fig. 3 is a cross-sectional view taken along line 1-111 in Fig. 1. 4 is an enlarged partial cutaway view of the main part of FIG. 3, and FIG. 5 is a view taken along the line V--V in FIG. 4. (1)...Marine structure, (2)...(=1 kimono, (
3)...Hull positioning device, (4)...Example kimono removal device, (5>...Hull, (24) (2+3)...
・Cutter. that's all

Claims (1)

[Claims] A hull positioning device (3) that adsorbs the marine structure (1) and positions the hull (5), and a kimono removal device (4) that moves the rotary cutters (24) and (26) for removing deposits.
A work boat equipped with