KR101135462B1 - Winch equipment in lng regsification vessel - Google Patents

Abstract

The present invention relates to a winch device of an LNG regasification vessel used for lifting a seabed buoy for docking between a turret of an LNG regasification vessel and a seabed buoy, wherein each component is modularized on a multi-level platform structure, so that the turret It is a technical task to provide a winch device for an LNG regasification vessel that expands the space on the periphery of the ship and, despite the expansion of the ship's space, can reliably raise the seabed buoy with sufficient force.

According to the present invention, there is provided a winch device of an LNG regasification vessel for lifting buoys on the seabed with a rope and docking them to the turret of the LNG regasification vessel, which winch device is supported by first shores built on board. A multi-level platform structure having a first platform, a second platform supported by second pillars erected on the first platform, and a third platform supported by third pillars erected on the second platform; A winch unit provided with at least one guide roller for guiding the rope and a driving unit for pulling the guide rope, wherein the at least one guide roller and the driving unit are installed at different positions of the platform structure; Include.

LNG, winch, turret, platform, compensation unit, winch unit, rope, buoy

Description

Winch System for LNK Regasification Ship {WINCH EQUIPMENT IN LNG REGSIFICATION VESSEL}

1 shows an LNG regasification vessel according to the invention.

Figure 2 shows a winch device being used for docking buoys and turrets in accordance with an embodiment of the present invention.

3 is a perspective view showing a winch device according to an embodiment of the present invention.

Description of the Related Art

5: buoy 10: vaporization equipment

52: winch unit 54: compensation unit

56: platform structure 522, 524: guide roller

526: winch drive unit 542: cylinder

544: sliding post 546: roller

562: first platform 564: second platform

566: third platform

The present invention relates to a LNG (Liquefied Natural Gas) regasification vessel, and more particularly, to a winch device of an LNG regasification vessel used to lift a seabed buoy for docking between a turret and a seabed buoy of an LNG regasification ship. It is about.

In recent years, the consumption of natural gas is rapidly increasing worldwide. Natural gas is transported in a gaseous state through onshore or offshore gas piping, or to a remote consumer while stored in an LNG carrier (especially an LNG carrier) in the form of liquefied natural gas. Liquefied natural gas is obtained by cooling natural gas at cryogenic temperatures (approximately -163 ° C), and its volume is reduced to approximately 1/600 of that of natural gas, making it well suited for long-distance transport through the sea.

The LNG Carrier is for discharging liquefied natural gas to the land requirements by loading the liquefied natural gas into the sea, and for this purpose, the LNG carrier includes an LNG cargo hold capable of withstanding the cryogenic temperature of the liquefied natural gas. Normally, such LNG transport ships unload liquefied natural gas in LNG cargo containers on land, and the unloaded LNG is regasified by LNG regasification facilities installed on land and then transported through gas piping to consumers of natural gas. .

Such onshore LNG regasification facility is known to be economically advantageous when installed in a place where there is a demand for natural gas because the natural gas market is well formed. However, in the case of natural gas demand where the demand for natural gas is seasonal, short-term or periodic, it is economically disadvantageous to install LNG regasification facilities on land due to the high installation cost and management cost.

In particular, if a land LNG regasification facility is destroyed due to a natural disaster, even if an LNG carrier arrives at a required destination, the LNG cannot be regasified. Therefore, natural gas transportation using an existing LNG carrier is limited. Is holding.

As a result, for example, LNG regasification vessels have been developed that provide gasification facilities in LNG carriers, regasify liquefied natural gas at sea, and supply natural gas obtained through regasification to land. In addition, the prior art associated with such LNG regasification vessels include Korean Patent No. 0569621 (ExxonMobil Oil Corp., Method and System for Gasification of LNG on a Transport Ship), US Patent No. 6,546,739 (Exmar Offshore Company, Method and apparatus) for offshore LNG regasification, US Pat. No. 6,578,366 (Moss Maritime AS, Device for evaporation of liquefied natural gas), US Pat. No. 6,688,114 (El Paso Corporation LNG CARRIER, US Pat. No. 6,598,408, El Paso Corporation, Method and apparatus for transporting LNG), Korean Patent No. 0467963 (Kang Do-wook, R & G Alv operation method), US Patent No. 6,945,049 (Hamworthy KSE as, Regasification system and method), Korean Patent No. 0504237 (Daewoo Shipbuilding & Marine Engineering Co., Ltd.) , Ships with shielding means to block the bottom openings, Korean Patent No. 0474522 (Daewoo Shipbuilding & Marine Engineering Co., Ltd., seawater heating sheath) ), Korean Patent Publication No. 2003 -0090686 (Life Hoeg Unt.A.S., Ship and Unloading System), US Patent Publication No. 2005-0061002A (Shipboard regasification for LNG carriers with alternate propulsion plants), Korean Patent Publication 2004-0105801 (Accelerated Energy Limited Partnership, Improved LNG Carrier) and Korea Utility Registration No. 0410836 (Samsung Heavy Industries Co., Ltd., LNG Natural Gas Reliquefaction System).

Conventional LNG regasification vessel, the vaporization facility for regasification (ie, regasification) of LNG stored in the LNG cargo hold, turret buried with the seabed buoys connected to the gas requirements of the land and the pipeline (turret), the seabed And a winch device for lifting buoys to dock the subsea buoys in the bottom opening of the turret. The force required to lift the seafloor buoys out of the sea is as large as a hundred tons, and therefore, conventional winch devices require a lot of large equipment. In the related art, many such devices are complicatedly arranged on the ship's periphery (i.e., the upper deck), whereby the space around the turret is narrowed, whereby the work space around the turret is greatly reduced. In particular, since each device constituting the conventional winch device is installed directly on the ship, since the workers on the ship move to avoid the equipment, the movement space of the workers participating in the operation of connecting the sea buoy to the turret can also be greatly limited. There was no.

Therefore, the technical problem of the present invention is that each component is modularized on a multi-layered platform structure, which expands the space on the periphery of the turret, and despite the expansion of the space on the turret, it is possible to reliably pull the seabed buoy with sufficient force. To provide a winch device for an LNG regasification vessel.

According to one aspect of the invention, there is provided a winch device of an LNG regasification vessel for lifting buoys on the seabed with a rope and docking them to the turret of the LNG regasification vessel. The winch device includes a first platform supported by first shores erected on a ship, a second platform supported by second shores erected on the first platform, and third shores erected on the second platform. And a multi-layered platform structure having a third platform supported by the at least one guide roller, the at least one guide roller for guiding the ropes, and a driving unit for pulling the guided ropes, wherein the at least one guide roller and the driving unit are And a winch unit installed at another location of the platform structure.

According to embodiments of the present invention, there is a space between the ship and the first platform where other equipment may be arranged or may be an operator's passage. In addition, the drive unit is installed on the first platform, the at least one guide roller is installed at an arbitrary position higher than the first platform. In addition, the at least one guide roller includes a first guide roller installed on the protruding structure between the second platform and the third platform and a second guide roller installed on the third platform.

Winch device according to an embodiment of the present invention further comprises a compensation unit configured to compensate for the movement of the rope, the compensation unit is preferably installed on the second platform. More preferably, the compensating unit includes a hydraulic cylinder installed on the second platform in parallel, a sliding post forward or retracted from the cylinder, and a roller facing the rope while being installed at the tip of the sliding post. .

In this case, the second platform and the third support, and the second platform and the third platform supported by the second support and the third support, respectively, can be disassembled with respect to the first platform. It is preferable to be assembled. In addition, a ladder is installed between the ship and the first platform, between the first platform and the second platform, and between the second platform and the third platform.

Example

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows an LNG regasification vessel connected with a seabed buoy according to an embodiment of the present invention.

As shown in FIG. 1, the LNG regasification vessel according to the present embodiment includes a vaporization facility 10 for regasifying (hereinafter referred to as 'regasification') liquefied natural gas (hereinafter referred to as LNG) and a seabed. The turret 30 includes a bottom opening for docking with the buoy 5, and an upper riser 20 for connecting the pipe between the vaporization facility 10 and the buoy 5.

The LNG regasification vessel of this embodiment is provided with an LNG cargo hold 2 under the hull and has a self-propelling capability, but may also be another offshore floating structure (eg, barge, etc.) without self-propelling capability. In this embodiment, the buoy 5 is connected to the subsea terminal 6 by means of a vertically flexible pipe under its own bottom, ie a lower riser 5a, mooring at a certain height in the sea. At this time, the subsea terminal 6 may relay the gas delivery to the land requirements through the subsea pipe (7).

The vaporization facility 10 includes a suction drum 12 for temporarily storing LNG drawn up from the LNG cargo hold 2, and a high pressure pump 13 for pressurizing the LNG supplied from the suction drum 12 to a high pressure. The vaporizer 14 includes a vaporizer 14 for vaporizing the LNG supplied by boosting the high pressure pump 13 using a heat exchange medium. As the heat exchange medium, sea water or fresh water may be used, or an intermediate heat exchange medium (eg, propane, ethane, ammonia, etc.) may be used together (see US Patent No. 6,945,049). Therefore, the LNG regasification vessel of the present embodiment may vaporize natural gas to LNG in the vaporization facility 10, and supply the vaporized natural gas to the buoy 5 through the upper riser 20. The natural gas supplied to the buoys 5 may be supplied to the land requirements through the lower riser 5a, the subsea terminal 6, and the subsea pipe 7.

On the other hand, the LNG regasification vessel of the present embodiment includes a winch device 50 for lifting the rope connected to the buoy 5 to dock the buoy 5 to the opening in the lower portion of the turret 30. The winch device 50 pulls through a turret 30 a rope 51 called a "messenger line", which is connected to the buoy 5 by a diver, for example, the buoy 5 having a turret 30. To be docked to the bottom opening.

2 is a view schematically showing the winch device 50 installed around the turret 30. Referring to FIG. 2, the winch device 50 includes a winch unit 52, a compensation unit 54, and a platform structure 56. The winch unit 52 includes the first and second guide rollers 522 and 524 and the winch driver 526 and serves to pull the rope 51 or release the pull. In addition, the compensation unit 54 is configured to release the action of pushing or pushing the rope 51 in one direction to compensate for the movement of the rope 51 moving by the winch unit 50. And, the winch unit 52 and the compensation unit 54 as described above are all installed on the platform structure 56. Rope 51 installed in the winch device 50 is extended to the seabed through the turret 30 is connected to the anchor chain installed in the seabed buoy (5). Accordingly, the winch device 50 can dock the buoy 5 to the turret 30 of the LNG regasification vessel by pulling the rope 51 connected by the buoy 5 and the anchor chain.

3 is a perspective view showing the winch device 50 according to a preferred embodiment of the present invention.

As shown in FIG. 3, the winch device 50 includes a multi-layered platform structure 56 which is installed around the turret 30 (see FIG. 2), and the winch unit (described above) in the platform structure 56. 52 and the components constituting the compensation unit 54 are installed.

The platform structure 56 includes four first pillars 561 standing on a shipboard (or upper deck) and a first platform 562 fixedly supported horizontally by the first pillars 561. Include. In addition, four second pillars 563 are erected on the first platform 562, and the second platform 564 is horizontally fixed and supported by the second pillars 563. In addition, four third pillars 565 are erected on the second platform 564, and the third platform 566 is horizontally fixed and supported by the third pillars 565.

At this time, the winch unit 52 which docks the buoy 5 (see FIGS. 1 and 2) to the bottom opening of the turret 30 (see FIGS. 1 and 2) by pulling the rope 51 and the like. And all equipment, including the compensation unit 54, are all installed at any position of the platform structure 56, including the first, second, third platform 562, 564, 566. At this time, a space other than the winch device 50 is disposed between the ship on the ship and the first platform 561 or an empty space for the ship worker to work or move, thus, the winch device 50 Despite being installed on the line around the turret 30, the actual work space around the turret 30 and / or the layout of other equipment is not reduced.

In addition, between the shipboard and the first platform 562, between the first platform 562 and the second platform 564, and between the second platform 564 and the third platform 566. Ladders 562a, 564a, and 566a are respectively installed, allowing the operator to conveniently move from onboard to the third platform 566. In addition, the front end extension of the second platform 564 and the front end extension of the third platform 566 extend to a position where they are coupled to each other to form one protrusion 568, the protrusion 568 is the second It is located at a height between the platform 564 and the third platform 566.

As mentioned above, the winch unit 52 includes first and second guide rollers 522 and 524 and winch driver 526 installed on the platform structure 56. The first guide roller 52 is rotatably installed on the above-described protrusion 568, and the turret 30 is positioned below the vertical portion thereof. Therefore, the first guide roller 522 serves to initially guide the rope 51 pulled up from the turret 30. The second guide roller 524 is rotatably installed on the third platform 566 located higher than the protrusion 568, and serves to guide the rope 51 second. The rope 51 guided as described above leads to the winch drive unit 526 via the roller 546 of the compensation unit 54 which will be described in detail below. The winch driver 526 includes a rotation reel 526a and a power source and a power transmission means 526b for rotationally driving the rotation reel 526a. In this case, for example, a large capacity hydraulic motor may be used as the power source. In addition, although not shown in detail, the winch driving unit 526 may be provided with means such as a brake and a clutch.

The winch unit 52 provides the rope 51 with a force to pull the rope 52 by the drive of the winch drive unit 526 and the rotation of the rotary reel 526a. Accordingly, the rope 52 is moved while being guided by the first and second guide rollers 524 and the like described above, and the buoy 5 connected to the rope 52 by the movement of the rope 52 (FIG. 1). And FIG. 2) may be lifted from the seabed. Then, at the position where the buoy 5 is docked to the bottom opening of the turret 30, the rope 51 and the buoy 5 connected thereto are stopped by brake means provided in the winch drive unit 526.

Meanwhile, a compensation unit 54 for compensating for the movement of the rope 51 is installed on the second platform 564. The compensation unit 54 serves to compensate for the movement of the rope 51, which is subjected to a large load of about 100 tons by hydraulic pressure, a cylinder 542 provided with a hydraulic pressure source, and by the hydraulic pressure source And a sliding post 544 provided to be able to move forward and backward from the cylinder 542, and a tip of the sliding post 544 guides the rope between the above-described second guide roller 524 and the winch drive unit 526. Roller 546 is installed. Therefore, the compensation unit 54 compensates the movement of the rope 51 by the sliding post 544 moving forward and backward from the cylinder 542 press or depress the rope 51 across the roller 546. can do.

In addition, the winch device 1 of the present embodiment is the main equipment is driven by the hydraulic pressure, and thus accumulate hydraulic energy, become an emergency hydraulic source in the emergency situation such as failure, power failure, etc., for the purpose of absorbing pulsation, impact pressure A hydraulic accumulator 57 is used. In this embodiment, the hydraulic accumulator 57 is preferably installed at a position where it is easy to remove, repair, and maintain, that is, a position to the left of the platform structure 56.

According to a preferred embodiment of the present invention, with respect to the first platform 562, the second platform and the third platform 564, 566 is configured to be easily separated and dismantled through the release of the fasteners, the first platform Each of the equipment installed on the third to third platforms 562, 564, 566 is also configured to be easily separated and disassembled through the release of the fasteners of the fasteners. In addition, the first to third platforms (562, 564, 566) is preferably provided with handrails (562b, 564b, 566b) for the safety of the operator. The winch device 1 may further comprise many other components in addition to the units or equipment described above, all of which may be installed in the platform structure 56.

While the invention has been described above with reference to specific embodiments, various modifications, changes or modifications may be made in the art within the spirit of the invention and the appended claims, and thus the foregoing description and drawings illustrate It should be construed as illustrating the present invention, not limiting the technical spirit of the invention.

According to embodiments of the present invention, each component constituting the winch device is modularized on the platform structure, thereby expanding the space on the periphery of the turret, and despite the expansion of the space on the turret, the submarine buoy with sufficient force is reliably The advantage is that it can be pulled up.

Claims (8)

It is a winch device of LNG regasification vessel for lifting buoys on the seabed with rope and docking them to the turret of LNG regasification vessel. A first platform supported by first props erected on board, a second platform supported by second props erected on the first platform, and a second support supported by third props erected on the second platform A multi-layered platform structure having three platforms; A winch unit having at least one guide roller for guiding the rope and a driving unit for pulling the guide rope, wherein the at least one guide roller and the driving unit are installed at different positions of the platform structure; Further comprising a compensation unit installed on the second platform and configured to compensate for the movement of the rope, The compensating unit includes a hydraulic cylinder installed on the second platform in parallel, a sliding post moving forward or backward from the hydraulic cylinder, and a roller facing the rope while being installed at the tip of the sliding post. Winch device for LNG regasification vessel. The winch device of an LNG regasification vessel according to claim 1, wherein a space is provided between the ship and the first platform so that other facilities can be arranged or can be a passage for an operator. delete The method of claim 2, wherein the at least one guide roller, characterized in that it comprises a first guide roller provided on the protruding structure between the second platform and the third platform and a second guide roller provided on the third platform. Winch device for LNG regasification vessel. delete delete The device of claim 1, wherein the second platform is supported by the second pillars and the third pillars, and the second pillars and the third pillars, respectively. The winch device of the LNG regasification ship, characterized in that the third platform is assembled to be disassembled with respect to the first platform. The ladder according to any one of claims 1, 2 and 4, wherein a ladder is installed between the ship and the first platform, between the first platform and the second platform, and between the second platform and the third platform. Winch device of the LNG regasification vessel, characterized in that the.

Images