WO2018093071A1

WO2018093071A1 - Apparatus for actively preventing marine floating body from twisting during mooring

Info

Publication number: WO2018093071A1
Application number: PCT/KR2017/012199
Authority: WO
Inventors: 이강수; 박병재; 기민석; 김현석; 김도엽
Original assignee: 한국해양과학기술원
Priority date: 2016-11-15
Filing date: 2017-10-31
Publication date: 2018-05-24
Also published as: KR101818175B1

Abstract

The present invention relates to an apparatus for preventing a marine floating body from twisting when same is being moored in the water by controlling, within a set permitted limit, the tension acting on the ropes connected to the marine floating body, the apparatus comprising: a floating main body, connected to the ropes, for providing a space for marine work while fixed and floating on the water; winches, installed on the upper part of the floating main body, for rewinding from or unwinding into the water the rope fixing the floating main body; fairleads, each of which is installed on one part of the floating main body, for guiding the rope to the winch while having the rope pass through self; braking units, each of which is installed on one part of the floating main body separated by a set distance from the fairlead, through which, as well as through the fairlead, the rope is passed, and which controls, to a set speed, the speed with which the rope is rewound on the winch; and a controller, installed on one part of the floating main body and connected to the winches and braking units, for controlling the operations of same, wherein the braking units control, by means of pressure exerted by external forces, the speed with which the ropes are rewound by means of the winches to a set speed.

Description

Device that actively prevents distortion during mooring of offshore fluids

The present invention relates to an apparatus for preventing distortion during mooring of mooring vessels, and more particularly, to an apparatus for actively preventing distortion during mooring of an offshore fluid while controlling the recovery speed of mooring ropes at a set speed.

In general, bridges for connecting islands far from land in the sea, dolphin-type eyepieces or breakwaters are structures installed at sea and are usually made of reinforced concrete.

Such marine structures are used in the production of various marine structures because floating structures floating on the sea surface are very advantageous in terms of city parks, rather than gravity structures that are self-supporting by their own weight.

Such a floating structure is floating on the sea surface with a part of the main body submerged in the sea surface, there is a floating space for providing buoyancy to the structure therein is provided with a mooring device to prevent the push by the waves have.

Such a conventional floating structure is produced by each unit unit in advance in the land fabrication site near the shore using concrete material, then launched by sea using a crane or the like, gradually increasing the unit units connected to each other Can be built.

Alternatively, build each floating concrete unit in a dry dock facing the sea, then open the dry dock's gate to fill the seawater and launch the unit to the sea to bring these floating concrete unit units to each other. It can also be connected long and build the body as a structure.

Alternatively, a floating dock of a large structure may be floated on the sea, each of the floating concrete unit units may be manufactured in the floating dock, and then the floating dock may be submerged to some extent, and the floating concrete unit units may be separated from each other. You can also build long by connecting.

Meanwhile, the mooring device provided in the conventional floating structure uses a conventional cable or chain, and connects a plurality of cables or chains to the lower portion of the floating structure, and fixes the end of the floating structure to an anchor. It is to prevent the rain caused by the above, such a conventional mooring device is difficult to properly respond to the change in the water level due to the difference between the wave or tidal current generated at sea.

For example, in the conventional mooring device, one end of the cable or chain is fixed to the lower end of the main body of the floating structure, the other end is fixed to the anchor, so when the sea level is lowered due to the difference between tides, The position is lowered so that the cable or chain is drooped and sag down, the position of the floating structure is changed, and it is difficult to obtain a stable mooring effect.

In addition, when the sea level rises, the floating structure rises with the sea level. In such a case, the tension of the cable or the chain is excessive, and there is a fear of breaking. Therefore, in order to prevent this, when designing a cable, a chain, and an anchor, the margin of overdesign should be greatly overdesigned, so that it is difficult to construct a stable offshore floating structure as well as the rise of the city park.

[Preceding technical literature]

[Patent Documents]

Republic of Korea Patent Publication No. 10-2009-0129003 (Name of the invention: floating structure mooring device using a weight body)

The present invention was created to improve the problems of the prior art as described above, and actively sets the set allowable limit of the tension to be lower than the MLB (Mooring Breaking Limit) so that the distortion limit angle due to weathering is limited. It is an object of the present invention to provide a device for actively preventing warpage during mooring of a marine floating fluid equipped with a controlling function.

An apparatus for actively preventing warpage during mooring of an offshore fluid according to the present invention for achieving the above object has a set allowance for a tension acting on a rope connected to the offshore fluid when mooring the offshore fluid at sea. An apparatus for controlling and preventing twisting of the offshore fluid, comprising: a floating main body connected to the rope and fixed at sea to provide floating and floating space; A winch installed at an upper portion of the floating body to recover or release the rope from which the rope is fixed to the floating structure at sea; A fairlead installed at a portion of the floating main body and guiding the rope to the winch while penetrating the rope; A braking unit installed at a portion of the floating body in a state where the distance set to the fairlead is spaced and controlling the speed at which the rope passes through the fairlead and the rope is recovered to the winch at a set speed; And a controller installed at a portion of the floating body and connected to the winch and the braking unit to control the operation of the winch and the braking unit, wherein the braking unit is recovered through the winch by pressurization by an external force. The recovery speed of the rope can be controlled at a set speed.

The braking unit may include: a first braking member installed between the fairlead and the winch at the floating body to control a recovery speed of the rope at a set speed by control of the controller; And a second braking member which is manufactured in the same configuration as the first braking member and installed under the fairlead to control a recovery speed of the rope at a set speed.

The first and second braking members may include: a rope holder installed at a portion of the floating body and through which the rope is passed; And a stopper installed at a portion of the rope holder to control a recovery speed of the rope to be recovered.

The stopper may include an air tube manufactured to correspond to the inner circumferential surface of the rope holder and installed along the inner circumferential surface of the rope holder to wrap the rope upward; A hydraulic pump installed at an upper portion of the floating body to provide or discharge hydraulic pressure to the air tube under control of the controller; And a hydraulic line connected to each of the hydraulic pump and the air tube through a hole formed in the rope holder to provide a passage through which the hydraulic pressure moves.

In addition, the rope holder, the engaging piece protruding the length set from both sides to the outer side along the longitudinal direction to be detachably coupled to the floating body and formed with at least one screw hole; And a coupling bolt detachably coupled to a fixing hole formed in the floating body corresponding to the screw hole formed in the coupling piece and the screw hole.

In addition, the air tube may be manufactured using a synthetic resin.

In the present invention, a device for actively preventing warpage at the time of mooring of an offshore fluid is provided with a braking unit in a part of the floating body in order to have a small MBL (Mooring Breaking Limit) when mooring the mooring line at sea. By controlling the recovery rate of the rope by using a thin rope there is an effect of reducing the cost.

1 is a perspective view of an apparatus for actively preventing warping during mooring of a marine fluid according to an embodiment of the present invention.

2 is a partially enlarged view of the braking unit;

3 is a side view of the anti-twist device.

4 shows another embodiment of the braking unit.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the invention are different, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

1 is a perspective view of an apparatus for actively preventing distortion during mooring of a marine fluid according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of the braking unit, and FIG. 3 is a side view of the anti-twisting device. 4 shows another embodiment of the braking unit.

1 to 4, in the apparatus for preventing the distortion of the marine fluids by controlling the tension acting on the rope connected to the marine fluids to the set allowable limit when the marine fluids mooring at sea The present invention may include a floating body 100, the winch 200, the fairlead 300, the braking unit 400 and the controller 700.

In other words, as a device for preventing warping of mooring ropes caused by weather-binding in the offshore fluid, weather vaning means that a ship or a floating structure is directed by a ship in the direction of wind, current, or blue action. The movement to make a turn.

In addition, the rope 30 can be used by adopting a steel wire or chain chain method of increasing the strength by twisting a plurality of strands of wire as pretzel.

The floating body 100 is connected to the rope 30 and can be fixed at the sea while floating to provide space for offshore work.

The floating body 100 is very excellent in corrosion resistance, mechanical strength and recyclability, and can be easily and firmly adhered and assembled by heat fusion method, preferably medium density polyethylene (MDPE) or high density polyethylene ( It is made of synthetic resin such as HDPE), which not only simplifies the installation process but also prevents the buoyancy material from being easily damaged by waves or external shocks, which improves the life and safety, and the floating area with the floating body installed on the debris away from the buoyancy material. Marine pollution caused by this can be prevented.

The winch 200 may be installed at the upper portion of the floating body 100 to recover or loosen the rope 30 for fixing the floating body 100 at sea.

The fairlead 300 may be installed at a portion of the floating body 100 and guide the rope 30 to the winch 200 while penetrating the rope 30.

The fair lead 320 (fair-lead) may be composed of rollers as a facility for preventing the wear of the mooring rope (chock) and the mooring rope is a hole through which the mooring rope exits outboard.

The braking unit 400 is installed on a part of the floating body 100 in a state in which the distance set in the fairlead 300 is separated, and the rope 30 penetrates along with the fairlead 300, and the rope 30 is The speed recovered to the winch 200 may be controlled to a set speed.

The braking unit 400 may control the recovery speed of the rope 30 recovered through the winch 200 by pressing the rope 30 to a set pressure by the control of the controller 700 at a set speed.

The braking unit 400 may include a first braking member 410 and a second braking member 420.

The first braking member 410 is installed between the fairlead 300 and the winch 200 in the floating body 100 to control the recovery speed of the rope 30 at a set speed under the control of the controller 700. Can be.

The second braking member 420 may be manufactured in the same configuration as the first braking member 410 and installed under the fairlead 300 to control the recovery speed of the rope 30 at a set speed.

The first and

second braking members

410 and 420 may include a rope holder 500 and a stopper 600.

The rope holder 500 may be installed at a portion of the floating body 100 and the rope 30 may pass therethrough.

The rope holder 500 may include a coupling piece 510 and a coupling bolt 520.

The coupling piece 510 may have a configuration in which at least one screw hole 500 is formed and protrudes a length set outwardly from both sides along the longitudinal direction so as to be detachably coupled to the floating body 100.

The coupling bolt 520 may be detachably coupled to the fixing hole 70 formed in the floating body 100 corresponding to the screw hole 50 and the screw hole 50 formed in the coupling piece 510.

That is, the rope holder 500 is made to be detachable to the floating body 100 to facilitate the repair or management by easy separation through the removal of the coupling bolt 520 when the failure or wear.

In addition to the above-described method, the rope holder 500 may be installed on the floating body 100 by a coupling rail and a slide corresponding to the corresponding portions of the floating body 100 and the rope holder 500. It is also possible to remove or install the clamp on the floating main body 100 and to fix the rope holder 500.

The stopper 600 may be installed at a portion of the rope holder 500 to control the recovery speed of the rope 30 to be recovered at a set speed.

The stopper 600 may include an air tube 610, a hydraulic pump 620, and a hydraulic line 630.

The air tube 610 is a component manufactured to correspond to the inner circumferential surface of the rope holder 500 and installed along the inner circumferential surface of the rope holder 500 to surround the rope 30.

The air tube 610 may be manufactured using a synthetic resin having excellent elasticity and durability.

Synthetic resin used as the material of the air tube 610 is styrene butadiene rubber (SBR), butadiene rubber (BR), ethylene propylene rubber (EPR), polyurethane (PU), polymethyl methacrylate (PMMA), poly4- Vinylphenol (P4VP), polystyrene-butadiene-block (SBS), polyimide (PI), polyurethane (PU), polyacrylonitrile (PAN), polyvinylchloride (PVC), polypropylene (PP), acrylo Nitrile Butadiene Styrene (ABS), Polycarbonate / Acrylonitrile Butadiene Styrene (PC / ABS), Polyethylene (PE), Polyethylene Terephthalate (PET), Polybutylene Terephthalate (PBT), Polyphenylene Sulfide (PPS) ), Polycarbonate (PC), nylon, low density polyethylene (LDPE), high density polyethylene (HDPE), crosslinked polyethylene (XLPE), tetraorthosilicate (TEOS), polyaniline, polythiophene, polyethylenedioxythiophene (PEDOT) , Polyimide, polystyrenesulfonate (PSS) , Polypyrrole, polyacetylene, polyp-phenylene, polyp-phenylene sulfide, polyp-phenylene vinylene, polythiophene-polythienylenevinylene, polysulfone, polyethersulfone, polyethylene naphthalate and polyvinyl It may be made of one or more materials selected from the group consisting of alcohol (PVA).

The air tube 610 may also be manufactured to be detachably attached to the rope holder 500. That is, the air tube 610 may be detachably coupled to the hydraulic line 630 and the screw through the hole formed in the rope holder 500, Velcro to each of the air tube 610 or the rope holder 500. By installing fasteners, magnets, or the like, or by forming bolt holes, it is possible to combine using bolts to separate only the air tube 610, thereby enabling simple replacement of damaged or worn air tubes.

The hydraulic pump 620 may be installed above the floating body 100 to provide or discharge hydraulic pressure to the air tube 610 under the control of the controller 700.

Hydraulic pump 620 (hydraulic pump) is a device for converting the mechanical energy supplied from the external to the pressure energy of the hydraulic system hydraulic fluid, a high pressure is required, so a positive displacement type (positive displacement type) is mainly used.

Generally, a gear type pressurized by using a gap between two rotating gear teeth, a vane type which presses and compresses hydraulic fluid using a vane installed on a rotating shaft, and is perpendicular to a rotating shaft. Or a rotary piston type that compresses by making the volume in several cylinders installed in parallel smaller in accordance with the rotational direction of the shaft, and a reciprocating type that presses the hydraulic fluid in the cylinder with a piston by converting the rotational motion into a reciprocating motion. piston type).

In addition, the pushed volume can be divided into a fixed delivery type (fixed delivery type) and a variable delivery type (variable delivery type) that can change the volume during operation.

Specifically, the operator actively manipulates the hydraulic pump 620 under the control of the controller 7000 to provide or discharge the hydraulic pressure set in the air tube 610 through the hydraulic line 630 to control the air pressure of the air tube 610. It is possible to control the recovery speed of the rope 30 by tightening or loosening the rope 30 by adjusting.

The hydraulic line 630 may be connected to the hydraulic pump 620 and the air tube 610 through holes formed in the rope holder 500 to provide a passage through which the hydraulic pressure moves.

The controller 700 is installed on a portion of the floating body 100 and is connected to the winch 200 and the braking unit 400 to control the operation of the winch 200 and the braking unit 400.

In addition, the present invention may further include an alarm that is installed in a part of the floating main body 100 to inform it when the recovery speed of the mooring rope 30 connected to the floating main body 100 exceeds the set speed.

In the present invention, a method of operating a device that actively prevents warping during mooring of an offshore fluid, the worker recovers the floating body 100 while recovering the rope 30 by using the winch 200 installed in the floating body 100. In order to stably float on the fairlead 300 to control the recovery speed of the mooring rope 30 while controlling the operation of the braking unit 400 installed in a part of the floating main body 100 through the controller 700 During mooring, the floating main body 100 can be prevented from being twisted.

To this end, the operator specifically operates the hydraulic pump under the control of the controller 700 and adjusts the air pressure of the air tube 610 while providing or discharging the set amount of hydraulic pressure to the air tube 610 connected through the hydraulic line. By tightening or loosening the rope 30, the recovery speed of the rope 30 can be controlled.

In the above, the present invention has been described based on the preferred embodiments, but the technical idea of the present invention is not limited thereto, and modifications or changes can be made within the scope of the claims. It will be apparent to those skilled in the art, and such modifications and variations will belong to the appended claims.

[Description of the code]

10: anti-twist device

30: rope

50: screw hole

70: fixing hole

100: floating body

200: winch

300: pair lead

400: braking unit

410: first braking member

420: second braking member

500: Rope Holder

510: combined piece

520: bolts

600: stopper

610: air tube

620: Hydraulic Pump

630: hydraulic line

700: controller

According to the present invention, in the case of mooring a mooring vessel at sea, a braking unit is installed on a part of the floating body to have a small MBL (Mooring Breaking Limit), and a thin rope can be used while controlling the recovery rate of the rope under the control of a controller. This can reduce the cost.

Claims

In the apparatus for preventing the twisting of the marine fluid by controlling the tension acting on the rope connected to the marine fluid to the set allowable limit when the marine fluid is mooring at sea,

A floating main body connected to the rope and fixed at sea to provide a space for floating while floating;

A winch installed at an upper portion of the floating body to recover or release the rope from which the rope is fixed to the floating structure at sea;

A fairlead installed at a portion of the floating main body and guiding the rope to the winch while penetrating the rope;

A braking unit installed at a portion of the floating body in a state where the distance set to the fairlead is spaced and controlling the speed at which the rope passes through the fairlead and the rope is recovered to the winch at a set speed; And

A controller installed at a portion of the floating body and connected to the winch and the braking unit to control an operation of the winch and the braking unit,

The braking unit,

And pressing the rope to a set pressure by controlling the controller to control a recovery speed of the rope recovered through the winch at a set speed.
The method according to claim 1,

The braking unit,

A first braking member installed between the fairlead and the winch in the floating body to control a recovery speed of the rope at a set speed by control of the controller; And

Produced in the same configuration as the first braking member and is installed under the fairlead to include a second braking member for controlling the recovery rate of the rope at a set speed actively distorted during mooring of the offshore fluid Device to prevent.
The method according to claim 2,

The first and second braking members,

A rope holder installed in a part of the floating body and through which the rope is penetrated; And

And a stopper that is installed at a portion of the rope holder and controls a recovery speed of the rope to be recovered.
The method according to claim 3,

The stopper is,

An air tube manufactured to correspond to the inner circumferential surface of the rope holder and installed along the inner circumferential surface of the rope holder to wrap the rope upward;

A hydraulic pump installed at an upper portion of the floating body to provide or discharge hydraulic pressure to the air tube under control of the controller; And

And a hydraulic line connected to each of the hydraulic pump and the air tube through a hole formed in the rope holder to provide a passage through which the hydraulic pressure moves.
The method according to claim 3,

The rope holder,

A coupling piece protruding a length set outwardly from both sides along a length direction so as to be detachably coupled to the floating body and having at least one screw hole formed therein; And

And a screw hole formed in the coupling piece and a coupling bolt detachably coupled to a fixing hole formed in the floating body corresponding to the screw hole.
The method according to claim 4,

The air tube is an apparatus for actively preventing distortion during mooring of the offshore fluid, characterized in that the manufacturing using a synthetic resin.