Control system for mooring quick release hook of FLNG (floating liquefied natural gas) ship

Abstract

The invention provides a control system for a mooring quick release hook of an FLNG (floating liquefied natural gas) ship. The control system comprises a system control cabinet, a remote control workstation and the mooring quick release hook, wherein the remote control workstation and the mooring quick release hook are arranged in a central control room; the system control cabinet is in communication connection with the mooring quick release hook through Profibus DP, and the system control cabinet is in communication connection with the remote control workstation through a CAT network; the number of the mooring quick release hooks is multiple, and each mooring quick release hook is provided with a foot switch on site. By providing multiple control modes, the system design not only improves the operation flexibility, but also solves the problems of limitation and reliability possibly existing in a single control mode, and ensures that an operator can accurately control the system under various conditions through multi-mode control and information feedback, so that the system reliability is improved. And the safety, the efficiency and the operation stability of mooring operation are obviously improved.

Description

Technical Field

[0001] The invention relates to the fields of ships, marine engineering and clean energy, and in particular to a control system for a FLNG ship mooring quick release hook. Background Art

[0002] With the growth of global energy demand, natural gas has become one of the important energy sources due to its clean and efficient characteristics, and the development of offshore natural gas fields has gradually attracted widespread attention. The floating liquefied natural gas production storage and unloading device (FLNG ship) is a new type of floating production platform that integrates natural gas extraction, processing, liquefaction and storage, and can also perform power management and storage and loading and unloading of liquefied natural gas (LNG). FLNG ships have become an important technical means for the development of offshore gas fields due to their advantages such as low investment cost, short construction period, low development risk and easy migration.

[0003] During the operation of the FLNG ship, the produced LNG needs to be transported to the land terminal by LNG tankers. Since FLNG ships are usually located in offshore natural gas fields far away from the land, the berthing, mooring and loading and unloading operations of the two ships become key links. The LNG tanker is moored to the mooring quick release hook of the FLNG ship through cables to achieve a stable connection between the two ships. However, since both the FLNG ship and the LNG tanker are floating on the sea, affected by environmental factors such as wind, waves, and ocean currents, there will be a large relative displacement and instability between the two ships, which increases the complexity and risk of mooring operations.

[0004] Especially during the LNG bunkering process, once an emergency occurs (such as bad weather, equipment failure or emergency evacuation), the mooring rope must be released quickly to separate the two ships to avoid accidents. Therefore, it is important to reasonably arrange a certain number of mooring quick release hooks on the FLNG ship and monitor and flexibly control them in real time through a reliable control system to ensure the safety and efficiency of LNG loading and unloading operations.

[0005] In the existing technology, the control system of the mooring quick release hook still has deficiencies in adapting to the complex marine environment, realizing multiple operation modes, improving response speed and reliability, etc. For example, some control systems only support a single operation mode and are difficult to flexibly respond to the needs of multiple scenarios; other systems lack the ability of coordinated control, which limits the efficient cooperation between LNG carriers and FLNG ships.

[0006] Based on the above problems, the present invention provides a control system for a FLNG ship mooring quick release hook, which aims to achieve multi-mode control and real-time monitoring of the mooring quick release hook, while meeting the requirements of high reliability and flexible applicability, and improving the safety and efficiency of loading and unloading operations between FLNG ships and LNG transport ships. Summary of the invention

[0007] A control system for a FLNG ship mooring quick release hook of the present invention is used to solve relevant technical problems in the background technology.

[0008] The technical solution provided by the present invention is as follows: a control system for a FLNG ship mooring quick release hook, comprising: a system control cabinet, a remote control workstation arranged in a central control room, and a mooring quick release hook;

[0009] The system control cabinet is connected to the mooring quick release hook through ProfibusDP, and the system control cabinet is connected to the remote control workstation through the CAT network;

[0010] There are multiple mooring quick release hooks, each of which is provided with a foot switch on site;

[0011] The system control cabinet controls the action of the mooring quick release hook or the remote control workstation sends a control signal to the system control cabinet to control the action of the mooring quick release hook or the corresponding mooring quick release hook action is controlled separately by a foot switch.

[0012] In one implementation mode, the mooring quick release hook is provided with a stress sensor for real-time acquisition and feedback of load signals, and the load signals are transmitted to the system control cabinet via Profibus DP.

[0013] In one implementation mode, 16 mooring quick release hooks are arranged on the starboard side of the mooring deck of the FLNG ship, and 5 mooring quick release hooks are arranged on the port side of the mooring deck of the FLNG ship, and each mooring quick release hook communicates in series via Profibus DP.

[0014] In one implementation mode, the remote control workstation adopts an embedded all-in-one workstation, which is installed on a control console in a central control room, and displays the status information of the mooring quick release hook received from the system control cabinet on a screen.

[0015] In one implementation mode, the driving power for releasing the mooring quick release hook comes from the AC400V power supply of the FLNG ship.

[0016] In one implementation mode, the system control cabinet communicates with the ship-shore communication system via RS232, the umbilical cable of the ship-shore communication system communicates with the LNG carrier, and the ship-shore communication system is used to receive control signals from the LNG carrier to the mooring quick release hook and feed back information of the mooring quick release hook to the LNG carrier.

[0017] In one implementation mode, the system control cabinet is connected to an alarm device arranged on the starboard and port sides of the mooring deck of the FLNG ship. The alarm device receives an active signal sent by the system control cabinet and displays high load, low load, release pre-alarm and other signals through a status indicator light and a speaker.

[0018] In one implementation mode, the alarm device is connected to the system control cabinet via a multi-core cable, and three alarm devices are respectively provided on the starboard and port sides of the mooring deck.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The control system of the present invention provides multiple control modes. This system design not only improves operational flexibility, but also solves the limitations and reliability problems that may exist in a single control mode. At the same time, through multi-mode control and information feedback, it ensures that the operator can accurately control the system under various circumstances, thereby significantly improving the safety, efficiency and operational stability of mooring operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the control system of the present invention.

[0022] The reference numerals are as follows: 1. system control cabinet; 2. remote control workstation; 3. mooring quick release hook; 4. foot switch; 5. alarm device; 6. ship-shore communication system. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0024] like Figure 1 As shown, the present invention is a control system for a FLNG ship mooring quick release hook, comprising a system control cabinet 1, a remote control workstation 2 and a plurality of mooring quick release hooks 3. The system control cabinet 1 communicates with the electrical junction box of each mooring quick release hook 3 through the Profibus DP bus, and is connected to the remote control workstation 2 through the CAT network. There are a plurality of mooring quick release hooks 3, and each mooring quick release hook 3 is provided with a foot switch 4 on site; a variety of control modes are realized, specifically:

[0025] 1. Instrument room control mode: The control interface is directly operated through the system control cabinet 1 to realize centralized control of the mooring quick release hook 3, and the instrument room control is used as a form of manual intervention.

[0026] 2. Remote control mode: A control signal is sent to the system control cabinet 1 through the remote control workstation 2 installed in the central control room, thereby controlling the action of the designated quick release hook 3.

[0027] 3. Local foot control mode: Each quick release hook 3 is equipped with a foot switch 4 locally. When a quick release hook 3 needs to be operated separately, the operator can directly step on the corresponding foot switch 4 to achieve a quick release action.

[0028] This multi-mode control method brings significant flexibility and reliability to the overall quick release hook 3 control. Through the combination of remote control, centralized control and local control by foot switch, the system can adapt to different operating scenarios. For example, in routine operations, remote control and centralized management can improve operational efficiency and safety, while in emergency situations, local control by foot switch allows for the rapid and precise release of specific quick release hooks 3, thereby improving emergency response capabilities. In addition, multi-mode control reduces the risk of failure that may be caused by a single control method, ensuring the high availability and stability of the entire system, especially in complex sea conditions and high load conditions. This design greatly improves the reliability and adaptability of FLNG ship mooring operations, meets diverse needs, and provides higher safety guarantees for offshore operations.

[0029] In this embodiment, the system control cabinet 1 is installed in the instrument room of the FLNG ship and adopts the form of a floor-standing 19-inch cabinet; a programmable logic controller, an input and output signal acquisition module and a network switch are configured in the cabinet, and its main functions include: collecting load sensor signals from each mooring quick release hook 3 and performing real-time information processing; controlling the release action of each mooring quick release hook 3 through the Profibus DP bus; receiving external signals and sending feedback information to the outside.

[0030] In this embodiment, the remote control workstation 2 adopts an embedded all-in-one workstation, which is installed on the control console of the central control room CCR. It displays the real-time information received from the system control cabinet 1 through the touch screen interface, such as the status of the mooring quick release hook 3, the load signal, etc. At the same time, it can be operated by touching the screen or input by keyboard and mouse.

[0031] In this embodiment, the mooring quick release hooks 3 are respectively arranged on the port and starboard sides of the FLNG ship. 16 mooring quick release hooks 3 are arranged on the starboard deck, and 5 mooring quick release hooks 3 are arranged on the port deck. The mooring quick release hooks 3 on both sides communicate in series through the Profibus DP bus, and the last mooring quick release hook 3 is connected to the system control cabinet 1 through Profibus DP for communication. This design achieves high integration and simplification of the system structure by arranging mooring quick release hooks 3 on the port and starboard sides of the FLNG ship respectively and using the Profibus DP bus for series communication. 16 and 5 quick release hooks 3 are arranged on the starboard and port sides respectively, which can meet the distributed operation requirements of different mooring requirements and adapt to the load distribution requirements under various sea conditions. The bus series communication method not only significantly reduces the wiring complexity, but also improves the efficiency and stability of data transmission, ensuring that the status of each quick release hook can be fed back to the system control cabinet 1 in real time. This structural design facilitates installation and maintenance, reduces system failure rate, and optimizes the mooring operation process of the FLNG ship through centralized management, thereby enhancing operational efficiency and safety.

[0032] The mooring quick release hook 3 is provided with a stress sensor for real-time acquisition and feedback of load signals, and the load signals are transmitted to the system control cabinet 1 via Profibus DP. The stress sensor provided on the mooring quick release hook 3 can acquire and feedback load signals in real time, and transmit them to the system control cabinet 1 via Profibus DP, thereby realizing dynamic monitoring of the stress conditions of each mooring quick release hook 3. This design enhances the safety and reliability of the mooring system. The operator can accurately judge the mooring status through the load data obtained in real time, and prevent damage to the hook body or system failure caused by overload or uneven stress. In addition, the real-time transmission of load data provides basic support for remote monitoring and system automation decision-making, and can issue warnings or take measures in time when abnormal situations occur, significantly improving the efficiency and safety assurance capabilities of the entire mooring operation.

[0033] The driving power for releasing the mooring quick release hook 3 comes from the AC400V power supply of the FLNG ship. By adopting the AC400V power supply, the quick release hook 3 can maintain strong power output under different working conditions, and can ensure the smooth release operation even under high load or emergency conditions, thereby improving the reliability and overall operating efficiency of the mooring system.

[0034] Furthermore, the alarm devices 5 are respectively arranged on the port and starboard sides of the mooring deck of the FLNG ship, and three alarm devices 5 are arranged on each side, which are connected to the system control cabinet 1 through a multi-core cable. The alarm device 5 includes a status indicator and a speaker, which is used to display and broadcast signals such as high load, low load, and release pre-alarm. After receiving the active signal from the system control cabinet 1, the alarm device 5 performs different color light indications and audio alarms according to the load state. Through the combination of status indicators and speakers, these alarm devices can intuitively display states such as high load, low load, and release warning, and provide timely and clear alarm prompts through audio signals, so that operators can quickly and accurately understand the working status of the mooring quick release hook 3. This design effectively improves the visualization and alarm capabilities of the system, especially in high load or emergency situations, providing a reliable basis for timely response measures, while reducing the risk of manual judgment errors. The multi-ship distributed setting further enhances the coverage of the alarm information, ensuring that operators can respond quickly no matter where they are, and significantly improving the safety and operating efficiency of the entire mooring system.

[0035] Example 2

[0036] This embodiment is a further design based on the embodiment 1. In order to realize ship-shore communication, the system control cabinet 1 is connected to the ship-shore communication system 6 via RS232, and the umbilical cable of the ship-shore communication system 6 communicates with the LNG carrier. The communication system can receive the control signal sent by the LNG carrier, and feed back the real-time status information of the mooring quick release hook 3 to the LNG carrier, so as to facilitate the coordinated operation between the ship and the shore. This two-way communication mechanism provides strong support for the coordinated operation between the ship and the shore, so that the operators of the LNG carrier can grasp the mooring status in real time, make accurate decisions, and remotely control the mooring quick release hook 3, thereby improving the safety, reliability and efficiency of the operation. In addition, the design simplifies the coordination process between the ship and the shore, reduces the delay and error of information transmission, and significantly improves the overall ability of the FLNG ship and the LNG carrier to work together.

[0037] This system provides four control modes:

[0038] Instrument room control mode: The control interface is directly operated through the system control cabinet 1 to realize centralized control of the mooring quick release hook 3, and the instrument room control is used as a form of manual intervention.

[0039] Remote control mode: A control signal is sent to the system control cabinet 1 through the remote control workstation 2 installed in the central control room, thereby controlling the action of the designated quick release hook 3.

[0040] On-site foot control mode: Each quick-release hook 3 is equipped with a foot switch 4 on-site. When a quick-release hook 3 needs to be operated separately, the operator can directly step on the corresponding foot switch 4 to achieve a quick release action.

[0041] Ship-shore collaborative control mode: the system control cabinet 1 is connected to the ship-shore communication system 6 via RS232, the umbilical cable of the ship-shore communication system 6 communicates with the LNG carrier, receives control instructions from the LNG carrier, and feeds back real-time status information of the quick release hook 3.

[0042] This system provides four modes: instrument room control, remote control, local pedal control, and ship-shore collaborative control, forming a flexible, diverse, and comprehensive operation scheme, effectively improving the reliability and adaptability of the mooring quick release hook 3 control system. This multi-mode design can meet the needs of different operation scenarios, and can flexibly switch control modes in both normal operations and emergency situations to achieve efficient and safe operations.

[0043] The instrument room control mode provides operators with centralized management capabilities, facilitating unified scheduling and manual intervention on the FLNG ship; the remote control mode uses the remote workstation in the central control room to achieve convenient monitoring and operation, making the control more efficient and visual; the local foot control mode provides a means to operate a certain quick release hook 3 individually, which is particularly suitable for the needs of precise release and reduces interference with the operation of other hook groups; the ship-shore collaborative control mode enables the LNG carrier to remotely monitor and operate the mooring quick release hook 3 through integration with the ship-shore communication system 6, thereby improving the efficiency and safety of ship-shore collaborative operations.

[0044] This system design not only improves operational flexibility, but also solves the limitations and reliability issues that may exist in a single control method. At the same time, through multi-mode control and information feedback, it ensures that operators can accurately control the system in various situations, significantly improving the safety, efficiency and operational stability of mooring operations.

[0045] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0046] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control system for a FLNG ship mooring quick release hook, comprising: A system control cabinet (1), a remote control workstation (2) arranged in a central control room, and a mooring quick release hook (3); The system control cabinet (1) is connected to the mooring quick release hook (3) through ProfibusDP, and the system control cabinet (1) is connected to the remote control workstation (2) through a CAT network; There are a plurality of mooring quick release hooks (3), and each mooring quick release hook (3) is provided with a foot switch (4) on site; The system control cabinet (1) controls the action of the mooring quick release hook (3) or the remote control workstation (2) sends a control signal to the system control cabinet (1) to control the action of the mooring quick release hook (3) or the action of the corresponding mooring quick release hook (3) is individually controlled by a foot switch (4).

2. A control system for a FLNG ship mooring quick release hook according to claim 1, characterized in that: The mooring quick release hook (3) is provided with a stress sensor for real-time acquisition and feedback of a load signal, and the load signal is transmitted to the system control cabinet (1) via Profibus DP.

3. A control system for a FLNG ship mooring quick release hook according to claim 1, characterized in that: The starboard side of the mooring deck of the FLNG ship is provided with 16 mooring quick release hooks (3), and the port side of the mooring deck of the FLNG ship is provided with 5 mooring quick release hooks (3), and each of the mooring quick release hooks (3) communicates in series via Profibus DP.

4. A control system for a FLNG ship mooring quick release hook according to claim 1, characterized in that: The remote control workstation (2) is an embedded all-in-one workstation installed on a control console in a central control room, and displays status information of the mooring quick release hook (3) received from the system control cabinet (1) on a screen.

5. A control system for a FLNG ship mooring quick release hook according to claim 1, characterized in that: The driving power for releasing the mooring quick release hook (3) comes from the AC400V power supply of the FLNG ship.

6. A control system for a FLNG ship mooring quick release hook according to claim 1, characterized in that: The system control cabinet (1) communicates with a ship-shore communication system (6) via RS232, an umbilical cable of the ship-shore communication system (6) communicates with an LNG carrier, and the ship-shore communication system (6) is used to receive control signals from the LNG carrier to a mooring quick release hook (3) and to feed back information from the mooring quick release hook (3) to the LNG carrier.

7. A control system for a FLNG ship mooring quick release hook according to claim 1, characterized in that: The system control cabinet (1) is connected to an alarm device (5) arranged on the starboard and port sides of the mooring deck of the FLNG ship. The alarm device (5) receives an active signal sent by the system control cabinet (1) and displays high load, low load, release pre-alarm and other signals through a status indicator light and a speaker.

8. A control system for a FLNG ship mooring quick release hook according to claim 7, characterized in that: The alarm device (5) is connected to the system control cabinet (1) via a multi-core cable, and three alarm devices are respectively arranged on the starboard and port sides of the mooring deck.

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