Anti-typhoon FSRU mooring system

Abstract

An anti-typhoon FSRU mooring system is characterized in that a plurality of berthing piers are arranged in a row on the sea, an FSRU ship transversely leans against the berthing piers, the berthing piers are located in the middle of the FSRU ship, the distribution range of the berthing piers is not smaller than 40% of the FSRU ship, an LNG ship transversely leans against the outer side of the FSRU ship, and a rubber fender is arranged between the FSRU ship and the LNG ship. Two FSRU mooring piers and an LNG mooring pier are symmetrically arranged at the two ends of the berthing pier, the two FSRU mooring piers are arranged side by side behind the berthing pier and away from the berthing pier on the outermost side by at least 40 m, and the LNG mooring pier and the berthing pier are located on the same horizontal line. The FSRU ship tying pier, the LNG ship tying pier and the berthing pier are sequentially connected through a gap bridge, the FSRU ship tying pier is moored with the bow end and the stern end of an FSRU ship, and the LNG ship tying pier is moored with an LNG ship. The wind resistance of the FSRU ship is greatly improved, the defect that an existing FSRU ship cannot resist typhoons is overcome, the installation and maintenance cost of the FSRU ship in the later period is reduced, the FSRU ship is suitable for long-term mooring use, and the defects that traditional tandem mooring is long in construction period and high in cost are overcome.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of shipbuilding and design, and particularly relates to a typhoon-proof FSRU mooring system. BACKGROUND

[0002] In recent years, liquefied natural gas (LNG) has been widely used due to its high safety and convenient transportation, and has become a new favorite in the world energy industry. As a new type of high-end equipment in today's international marine engineering, the offshore LNG floating storage and regasification unit (FSRU ship) can be used as a marine terminal to provide natural gas to land, and its function is equivalent to a mobile LNG storage, regasification and natural gas supply station on the sea.

[0003] However, the location of the FSRU ship is affected by the local environment, and it is usually necessary to select an area with mild sea conditions. Most areas along the coast of China are subject to typhoons, and the traditional FSRU ship mooring method cannot resist typhoon sea conditions. In the case of high wind levels, the FSRU ship needs to be disconnected from the terminal, the mooring cable is released, and the FSRU ship is moved to a safe anchorage. After the typhoon passes, it needs to be reinstalled, which increases the cost of later maintenance and installation and reduces the operating efficiency of the FSRU ship. In particular, the southeast coast is frequently hit by typhoons, and the daily sea conditions are relatively harsh. The application of the traditional FSRU ship and LNG ship side-by-side mooring scheme has a short export window period and cannot be effectively applied to harsh sea areas. Therefore, it is necessary to further improve the environmental resistance level of the FSRU permanent mooring and the FSRU-LNG ship combined mooring. SUMMARY

[0004] To solve the above problems, the application provides a typhoon-proof FSRU mooring system, which aims to improve the environmental resistance level of the FSRU ship permanent mooring and the FSRU ship and LNG ship combined mooring. The technical scheme adopted is:

[0005] A typhoon-proof FSRU mooring system, a plurality of berthing piers are fixed on the sea, the plurality of berthing piers are arranged in a row, there is a spacing between the plurality of berthing piers, the FSRU ship is transversely arranged on the berthing pier, the plurality of berthing piers are located in the middle of the FSRU ship, the distribution range is not less than 40% of the FSRU ship, the LNG ship is transversely arranged on the outer side of the FSRU ship, and the FSRU ship and the LNG ship are provided with rubber fenders.

[0006] The berthing pier is symmetrically provided with an FSRU mooring pier and an LNG mooring pier at both ends, two FSRU mooring piers and one LNG mooring pier are arranged on each side of the berthing pier, the two FSRU mooring piers are arranged side by side behind the side of the berthing pier, and the distance between the two FSRU mooring piers and the outermost berthing pier is at least 40 m, and the LNG mooring pier is located on the same horizontal line as the berthing pier.

[0007] The FSRU mooring dolphin, the LNG mooring dolphin and the berthing dolphin are sequentially connected through a bridge, the FSRU mooring dolphin extends a FSRU mooring transverse cable to moor the FSRU ship at both ends of the bow and the stern, and the LNG mooring dolphin extends a shore mooring rope to moor the LNG ship.

[0008] The FSRU ship and the LNG ship are fixed through the LNG mooring transverse cable, the bow and the stern of the FSRU ship are provided with quick unmooring hooks on the deck, one end of the LNG mooring transverse cable is fixed to the quick unmooring hook, and the other end is fixed to a fairlead on the side of the LNG ship.

[0009] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0010] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0011] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0012] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0013] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0014] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0015] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0016] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0017] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0018] The FSRU mooring system further comprises a berthing dolphin fixed by piling.

[0019] 1. The application provides a mooring scheme of an FSRU ship single system mooring wharf, through design selection of wear-resistant steel wire rope+high-elasticity nylon rope, large-size cylindrical fender, through reasonable arrangement of the position and angle of the cable, the wind resistance of the FSRU ship is greatly improved, the situation that the existing FSRU ship cannot resist typhoon is made up, and thus the installation and maintenance cost of the FSRU ship in the later period is reduced.

[0020] 2. The FSRU ship and the LNG ship are moored at the wharf, the FSRU ship is moored for a long time, the LNG ship arriving at the port is parked at the outer side of the FSRU ship, the configuration scheme of the steel wire rope+nylon rope is adopted when the FSRU ship is permanently moored, the size of the mooring winch equipment can be effectively reduced by using the steel wire rope, the deck utilization rate is improved, and the steel wire rope is more suitable for long-term mooring use; the high-elasticity nylon rope is beneficial to reducing the dynamic response of the first-order wave motion to the mooring system; the mooring cable between the FSRU ship and the LNG ship is a composite cable of high-strength HMPE and high-elasticity nylon cable, that is, the general mooring equipment configuration level of the existing LNG ship is considered, and the quick unhooking is arranged by extending the cable on one side of the FSRU ship by at least 15 m, so that the connection can be quickly realized, the length of the nylon cable is increased, the change of the cable rigidity under the change of the wave, the tide level and the loading is reduced, and the operation window period of the side-by-side mooring is improved.

[0021] 3. The application adopts the mode of the side-by-side mooring of the FSRU and the LNG ship, the use length of the shore station can be reduced, the process is simple, and the defects of long construction period and high cost of the traditional tandem mooring are solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the application;

[0023] Figure 2 is a structural schematic diagram of the mooring dolphin;

[0024] Among them: 1-FSRU ship, 2-LNG ship, 3-mooring dolphin, 4-FSRU mooring dolphin, 5-bridge, 6-FSRU mooring transverse cable, 7-FSRU mooring back cable, 8-mooring dolphin fender, 9-winch, 10-quick unhooking, 11-rubber fender, 12-LNG mooring back cable, 13-LNG mooring transverse cable, 14-land cable, 15-cable guide hole, 16-LNG mooring dolphin. DETAILED DESCRIPTION

[0025] The application is further described in combination with the drawings.

[0026] A typhoon-resistant FSRU mooring system, taking a 175,000-ton FSRU as an example, as shown in Figure 1As shown, three groups of berthing piers are arranged, which are distributed in the middle of the ship and symmetrically distributed at the bow and stern. The berthing piers are fixed by piling, and the berthing piers in the middle of the ship can bear 2000 tons of load, and the two groups of berthing piers at the bow and stern can bear 1000 tons of load. The FSRU ship is transversely arranged on the berthing piers, and multiple berthing piers are arranged in the middle and on both sides of the FSRU ship, and the distribution range is not less than 40% of the FSRU ship. The LNG ship is transversely arranged outside the FSRU ship, and rubber fenders are arranged between the FSRU ship and the LNG ship.

[0027] FSRU mooring dolphins and LNG mooring dolphins are symmetrically arranged on both sides of the berthing pier, two FSRU mooring dolphins and one LNG mooring dolphin are arranged on each side of the berthing pier, and the two FSRU mooring dolphins are arranged side by side behind the berthing pier on the side, and are at least 40m away from the outermost berthing pier. The LNG mooring dolphin is located on the same horizontal line as the berthing pier.

[0028] The FSRU mooring dolphin, the LNG mooring dolphin and the berthing pier are sequentially connected through a bridge, the FSRU mooring dolphin extends an FSRU mooring cross rope for mooring the bow and stern of the FSRU ship, and the LNG mooring dolphin extends a shore mooring rope for mooring the LNG ship.

[0029] The FSRU ship and the LNG ship are fixed by the LNG mooring cross rope, and the deck of the bow and stern of the FSRU ship is provided with a quick unhooking hook to realize quick connection and unhooking of the rope. One end of the LNG mooring cross rope is fixed to the quick unhooking hook, and the other end is fixed to the fairlead hole on the side of the LNG ship.

[0030] Six groups of mooring dolphins are arranged, each mooring dolphin can moor six ropes at most, the mooring dolphin can bear a cable tension load of 1000 tons, and the minimum distance of the mooring dolphin from the FSRU berthing side is 42m.

[0031] Eight groups of berthing pier fenders are arranged on the three groups of berthing piers, the maximum reaction force of the fender is 500 tons, the compression amount is 50%, and the deformation amount is 1.5 meters.

[0032] The FSRU mooring cross rope and the FSRU mooring back rope are composite ropes, the FSRU mooring cross rope and the LNG mooring cross rope are steel wires, the FSRU mooring back rope and the LNG mooring back rope are high-elasticity nylon ropes, the length is 11 meters, and the tensile amount when broken is 22%.

[0033] The pre-tension of the steel wire rope on the FSRU is adjusted and locked by the winch on the FSRU, and the pre-tension is 10 tons under low tide to ensure that the offset amount of the FSRU ship under other water level changes meets the engineering requirements.

[0034] The minimum angle between the FSRU mooring cross rope and the length direction of the FSRU ship is 60 degrees.

[0035] The angle between the FSRU mooring back rope and the length direction of the FSRU is 8 degrees.

[0036] Rubber fenders are arranged on the other side of the FSRU, and the number of the rubber fenders is 4 and the diameter of the rubber fenders is 8 meters.

Claims

1. A typhoon resistant FSRU mooring system characterized by, There are multiple berths (3) on the sea, multiple berths are arranged in a row, there is a spacing between multiple berths, the FSRU ship (1) is alongside the berth, multiple berths are located in the middle of the FSRU ship, the distribution range is not less than 40% of the FSRU ship, the LNG ship (2) is alongside the FSRU ship outside, and the rubber fender (11) is arranged between the FSRU ship and the LNG ship; Two FSRU mooring dolphins (4) and one LNG mooring dolphin (16) are symmetrically arranged at the head and tail of the berth, the two FSRU mooring dolphins are arranged side by side behind the side of the berth, and are at least 40m away from the outermost berth, and the LNG mooring dolphin is located on the same horizontal line as the berth; The FSRU mooring dolphin, the LNG mooring dolphin and the berth are sequentially connected through the bridge (5), the FSRU mooring dolphin extends the FSRU mooring transverse cable (6) to moor the bow and stern of the FSRU ship, and the LNG mooring dolphin extends the shore mooring cable (14) to moor the LNG ship; The FSRU ship and the LNG ship are fixed through the LNG mooring transverse cable (13), the bow and stern of the FSRU ship are provided with the quick unmooring hook (10), one end of the LNG mooring transverse cable is fixed with the quick unmooring hook, and the other end is fixed with the fairlead (15) on the side of the LNG ship.

2. A storm resistant FSRU mooring system according to claim 1, characterized in that, The berth is fixed by piling.

3. A storm resistant FSRU mooring system according to claim 1, characterized in that, The berth and the FSRU ship are provided with the berth fender (8).

4. A storm secure FSRU mooring system according to claim 1, wherein, The maximum deformation of the fender is at least 1.5 meters.

5. A storm secure FSRU mooring system according to claim 1, wherein, Multiple winches (9) are fixed on the bow and stern deck of the FSRU ship, and the FSRU mooring transverse cable is adjusted and locked in pre-tension through the winch.

6. A storm secure FSRU mooring system according to claim 1, wherein, The angle between the FSRU mooring transverse cable and the length direction of the FSRU ship is between 60-90 degrees, and approaches 90 degrees infinitely.

7. A storm secure FSRU mooring system according to claim 1, wherein, The LNG mooring transverse cable is arranged between the FSRU ship and the LNG ship, the angle between the LNG mooring transverse cable and the length direction of the FSRU ship is between 5-20 degrees, and approaches 5 degrees infinitely.

8. A storm secure FSRU mooring system according to claim 1, wherein, The fairlead (15) is arranged on the side of the FSRU ship, the position of the fairlead on the side of the FSRU ship corresponds to the position of the fairlead on the side of the LNG ship, and the LNG mooring transverse cable passes through the fairleads on the sides of the FSRU ship and the LNG ship in turn.

9. A storm secure FSRU mooring system according to claim 1, wherein, The FSRU mooring transverse cable needs to ensure that the pre-tension reaches at least 10 tons under low tide.

10. A storm secure FSRU mooring system according to claim 5, wherein, ​

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