KR102530788B1 - Loading Arm System for Bunkering Liquefied Natural Gas - Google Patents

Abstract

A liquefied natural gas bunkering loading arm system is provided. This liquefied natural gas bunkering loading arm system is a hose handling crane installed at the supply point, which is capable of pivoting, and consists of a plurality of extension booms and an extension bracket coupled to the end boom, liquefied natural gas from a manifold connected to the supply bunker. A supply hose connected to the end boom and a first hook for lifting and transporting the supply hose, connected to the end of the extension bracket opposite to the end boom and holding an emergency release system provided at the end of the supply hose. Mounted on the upper sheave of the 2 hooks and the second hook provided at the end of the extension bracket, the applied load is sensed and the tension applied to the first hook holding the supply hose and the second hook holding the emergency release system It includes a load cell that generates a signal to control the applied tension.

Description

Liquefied Natural Gas Bunkering Loading Arm System {Loading Arm System for Bunkering Liquefied Natural Gas}

The present invention relates to a liquefied natural gas bunkering loading arm system, and more particularly to a liquefied natural gas bunkering loading arm system having a constant tension control function for protecting a supply hose used in liquefied natural gas bunkering.

Liquefied Natural Gas (LNG) bunkering refers to the injection of liquefied natural gas as fuel for ships.

In general, in such liquefied natural gas bunkering, the liquefied natural gas in the storage tank of the supply vessel is unloaded into the storage tank of the supply vessel in a liquefied state, and the boil off gas (BOG) generated in the storage tank of the supply vessel is unloaded to the supply vessel. It is stored after being regasified by the liquefied natural gas regasification facility installed on the supply ship.

In this process, a transfer pipe for transporting the liquefied natural gas is interconnected between the liquefied natural gas supply line and the supply line.

A loading arm is used to interconnect these transport channels. The conventional loading arm uses a balance weight in the pipe type used to absorb the relative movement caused by the influence of waves between the supply and supply lines, and the passage between cylinders. Obtain and use free wheel mode.

Absorbing passive motion using such a counterweight is good for absorbing relative motion without a separate power source or power source, but there is a disadvantage in installing on a ship because the equipment is inevitably large.

The loading arm installed on the upper deck of the supply vessel to supply liquefied natural gas to the supply vessel handles the supply hose and Emergency Release System (ERS) and connects it to the supply vessel. do.

After the supply hose and emergency release system are fastened to the manifold of the supply vessel, relative movement may occur between the supply vessel and the supply vessel during bunkering. This is because both the supply ship and the supply ship are floating on the sea, and fenders are installed between the ships and tied using a winch, but unavoidable relative movement occurs.

Since liquefied natural gas is at a low temperature of minus 165 degrees Celsius, when the liquefied natural gas is transported through the supply hose, the supply hose is frozen due to the low temperature environment, and when relative movement occurs between the supply line and the supply line, force is applied to the supply hose to supply There are problems that cause hoses and emergency release systems to break.

Republic of Korea Patent Publication No. 10-2013-0134244 Republic of Korea Patent Publication No. 10-2015-0066744 Republic of Korea Patent No. 10-1691705

The problem to be solved by the present invention is to provide a liquefied natural gas bunkering loading arm system having a constant tension control function capable of protecting a supply hose and an emergency release system in the process of bunkering liquefied natural gas from a supply ship to a supply ship. .

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a liquefied natural gas bunkering loading arm system. This liquefied natural gas bunkering loading arm system is a hose handling crane installed at the supply point, which is capable of pivoting, and consists of a plurality of extension booms and an extension bracket coupled to the end boom, liquefied natural gas from a manifold connected to the supply bunker. A supply hose connected to the end boom and a first hook for lifting and transporting the supply hose, connected to the end of the extension bracket opposite to the end boom and holding an emergency release system provided at the end of the supply hose. Mounted on the upper sheave of the 2 hooks and the second hook provided at the end of the extension bracket, the applied load is sensed and the tension applied to the first hook holding the supply hose and the second hook holding the emergency release system A load cell for generating a signal for controlling the applied tension may be included.

The load cell generates a signal for lowering the tensions applied to the first and second hooks when the sensed load is equal to or greater than a preset load, and the load cell generates a signal to lower the tensions applied to the first and second hooks when the sensed load is equal to or less than the preset load. It is possible to generate a signal that increases the tensions applied to.

The liquefied natural gas bunkering loading arm system may include a 3-wire sensor connected between a manifold connected to the supply bunker and an emergency release system.

Hose handling cranes can be provision type or telescopic type.

The liquefied natural gas bunkering loading arm system may include a control unit for controlling a hose handling crane and an emergency release system.

The liquefied natural gas bunkering loading arm system may include an emergency release system power pack connected to a control unit to drive an emergency release system.

As described above, according to the solution to the problem of the present invention, the liquefied natural gas bunkering loading arm system includes a hose handling crane, a first hook for lifting and transporting the supply hose, and an emergency release system. A load cell mounted on a second hook and an upper sheave of the second hook to detect an applied load and generate a signal for controlling tension applied to the first and second hooks By doing so, it is possible to control the tension applied to the first hook holding the supply hose and the tension applied to the second hook holding the emergency release system. Accordingly, a liquefied natural gas bunkering loading arm system having a constant tension control function capable of protecting a supply hose and an emergency release system in the process of bunkering liquefied natural gas from a supplier to a supply vessel can be provided.

In addition, according to the solution to the problem of the present invention, the liquefied natural gas bunkering loading arm system includes a second hook holding the emergency release system and a load cell for generating a signal for controlling the tension applied to the second hook By including, Counterweights and/or fall arrest systems may not be required. Accordingly, a liquefied natural gas bunkering loading arm system of simple construction may be provided that does not require a counterweight or/and fall protection system.

1 is a schematic configuration diagram for explaining a liquefied natural gas bunkering loading arm system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in different forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art, and the present invention is only defined by the scope of the claims.

Like reference numbers designate like elements throughout the specification. Accordingly, the same reference numerals or similar reference numerals may be described with reference to other drawings, even if not mentioned or described in the drawings. Also, even if reference numerals are not indicated, description may be made with reference to other drawings.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, 'comprises' and/or 'comprising' refers to the presence of one or more other elements, steps, operations and/or devices mentioned. or do not rule out additions. In addition, since it is according to a preferred embodiment, reference numerals presented according to the order of description are not necessarily limited to the order.

An element is said to be 'connected to' or 'coupled to' with another element when it is directly connected to or coupled to another element, or another element in the middle. Includes all cases involving On the other hand, when one component is referred to as 'directly connected to' or 'directly coupled to' another component, it indicates that another component is not intervened. 'and/or' includes each and every combination of one or more of the recited items.

The spatially relative terms 'below', 'beneath', 'lower', 'above', 'upper', etc. It can be used to easily describe the relationship between devices or components and other devices or components. Spatially relative terms should be understood as encompassing different orientations of the device in use or operation in addition to the orientations shown in the figures. For example, when a device shown in the drawings is turned over, a device described as 'below' or 'beneath' another device may be placed 'above' the other device. Accordingly, the exemplary term 'below' may include directions of both down and up. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to the orientation.

In addition, the embodiments described in this specification will be described with reference to cross-sectional views and/or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Accordingly, the shape of the illustrative drawings may be modified due to manufacturing techniques and/or tolerances. Therefore, embodiments of the present invention are not limited to the specific shapes shown, but also include changes in shapes generated according to manufacturing processes. For example, an area shown as a right angle may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have schematic properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a specific shape of the region of the device and are not intended to limit the scope of the invention.

1 is a schematic configuration diagram for explaining a liquefied natural gas bunkering loading arm system according to an embodiment of the present invention.

Referring to FIG. 1, the liquefied natural gas bunkering loading arm system is installed at the supply point, is pivotable, and is composed of a plurality of extension booms and an extension bracket 110 coupled to the end boom. A hose handling crane 100, a supply hose 220 for supplying liquefied natural gas from a manifold 210 connected to a bunker 200 of a supplier to a supply ship 1000, and a supply hose 220 connected to an end boom A first hook 120 for lifting and transporting a second hook connected to the end of the extension bracket 110 facing the end boom and holding the emergency release system 230 provided at the end of the supply hose 220 130, and a first hook mounted on an upper sheave (not shown) of the second hook 130 provided at the end of the extension bracket 110 to sense the applied load and hold the supply hose 220 ( 120) and a load cell (not shown) generating a signal for controlling the tension applied to the second hook 130 holding the emergency release system 230.

The supply source may be a ground terminal or station, or may be an offshore supply ship or a floating production storage and off loading (FPSO).

Since the hose handling crane 100 is composed of a plurality of extension booms, it is possible to transfer the supply hose 220 in the longitudinal direction toward the supply vessel 1000. That is, the hose handling crane 100 may be composed of three or more extended booms as needed. Extension booms of the hose handling crane 100 may be extended and shortened in length by hydraulic pressure. The hose handling crane 100 may be of a provision type or a telescopic type.

In a moving mode for transporting the supply hose 220 and the emergency release system 230, a hydraulic drive using a manual lever may be used.

After the emergency release system 230 is engaged with the manifold of the supply vessel 1000, the bunkering mode may be driven.

In the bunkering mode, each driving valve of the first and second hooks 120 and 130 may be switched to a solenoid driving mode.

Based on the weight of the emergency release system 230, the upper and lower limits of the load applied by the load cell mounted on the upper sheave of the second hook 130 are set, and the load detected by the load cell is compared with the preset load Displacement of the supply hose 220 and the emergency release system 230 substantially according to the load applied to the emergency release system 230 by controlling the solenoid valves driving the first and second hooks 120 and 130 respectively. can be adjusted.

The load cell generates a signal to lower the tensions applied to the first and second hooks 120 and 130 when the sensed load is greater than or equal to a preset load, and the load cell generates a signal to lower the tensions applied to the first and second hooks 120 and 130 when the sensed load is less than or equal to a preset load. A signal for increasing tensions applied to the first and second hooks 120 and 130 may be generated.

In other words, when the supply line 1000 descends relative to the supply line due to the influence of waves, etc. (conversely, when the supply line rises relative to the supply line 1000), the manifold of the supply line 1000 Since the emergency release system 230 engaged in descends together, the load sensed by the load cell is greater than the upper limit of the preset load, so the load cell is subjected to tension applied to the first and second hooks 120 and 130 By generating a signal that lowers the hooks, the first and second hooks 120 and 130 can be lowered.

In addition, when the supply line 1000 rises relative to the supply line due to the influence of waves, etc. (conversely, when the supply line descends relative to the supply line 1000), the manifold of the supply line 1000 Since the emergency release system 230 engaged in rises together, the load sensed by the load cell is smaller than the preset lower limit of the load, so the load cell is applied to the first and second hooks 120 and 130 By generating a signal that raises the tensions, the first and second hooks 120 and 130 can be raised.

In addition, when the emergency release system 230 is urgently separated from the manifold of the supply ship 1000, the load sensed by the load cell is much smaller than the lower limit of the preset load, so the load cell has a second hook 130 ) By generating a signal to increase the tension applied to the second hook 130 can be raised. Accordingly, the liquefied natural gas bunkering loading arm system according to an embodiment of the present invention can satisfy the retraction operation after emergency separation of the emergency release system 230 specified in the port loading arm rule.

The liquefied natural gas bunkering loading arm system may include a 3-wire sensor 240 connected between a manifold 210 connected to the supply bunker 200 and an emergency release system 230. The 3-wire sensor 240 may sense a horizontal load between the supplier and the supply vessel 1000 to generate a signal for controlling the extension booms to adjust the length of the hose handling crane 100. Accordingly, the liquefied natural gas bunkering loading arm system according to an embodiment of the present invention can cope with the situation according to the change in the distance between the supplier and the supply ship 1000 by hydraulic drive using a manual lever in the moving mode.

The liquefied natural gas bunkering loading arm system may include a control unit 300 for controlling the hose handling crane 100 and the emergency release system 230 . That is, the control unit 300 may control the overall operation of the liquefied natural gas bunkering loading arm system.

The liquefied natural gas bunkering loading arm system may include an emergency release system powerpack 400 connected to the control unit 300 to drive the emergency release system 230 .

The liquefied natural gas bunkering loading arm system according to an embodiment of the present invention includes a hose handling crane, a first hook for grabbing and transporting a supply hose, a second hook for holding an emergency release system, And a load cell mounted on the top sheave of the second hook to detect an applied load and generate a signal to control the tension applied to the first and second hooks, thereby holding the supply hose to the first hook It is possible to control the tension applied and the tension applied to the second hook holding the emergency release system. Accordingly, a liquefied natural gas bunkering loading arm system having a constant tension control function capable of protecting a supply hose and an emergency release system in the process of bunkering liquefied natural gas from a supplier to a supply vessel can be provided.

In addition, the liquefied natural gas bunkering loading arm system according to an embodiment of the present invention includes a second hook holding the emergency release system and a load cell for generating a signal for controlling the tension applied to the second hook, thereby maintaining balance May not require weights and/or fall arrest systems. Accordingly, a liquefied natural gas bunkering loading arm system of simple construction may be provided that does not require a counterweight or/and fall protection system.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

100: hose handling crane
110: extension bracket
120, 130: first and second hooks
200: Bunker
210: manifold
220: supply hose
230: emergency release system
240: 3-wire sensor
300: control unit
400: emergency release system power pack
1000: supply line

Claims (5)

A hose handling crane installed at a supply point, capable of turning, and composed of a plurality of extension booms and an extension bracket coupled to the end boom;
a supply hose for supplying liquefied natural gas from a manifold connected to the bunker of the supplier to a supply vessel;
A first hook connected to the terminal boom to catch and transport the supply hose;
A second hook connected to the end of the extension bracket facing the end boom and holding the emergency release system provided at the end of the supply hose; and
Mounted on the upper sheave of the second hook provided at the end of the extension bracket, detecting the applied load and holding the supply hose, the tension applied to the first hook and the first hook holding the emergency release system. 2 includes a load cell that generates a signal to control the tension applied to the hook;
The load cell generates a signal to lower the tensions applied to the first and second hooks when the sensed load is greater than or equal to a preset load, and the load cell generates a signal to lower the tensions applied to the first and second hooks. A liquefied natural gas bunkering loading arm system for generating a signal to increase the tensions applied to the first and second hooks. delete According to claim 1,
A liquefied natural gas bunkering loading arm system including a 3-wire sensor connected between the manifold connected to the bunker of the supply and the emergency release system. According to claim 1,
A liquefied natural gas bunkering loading arm system including a control unit for controlling the hose handling crane and the emergency release system. According to claim 4,
A liquefied natural gas bunkering loading arm system connected to the controller and including an emergency release system power pack for driving the emergency release system.

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