KR101434151B1 - Chain locking system used for turret - Google Patents

Abstract

A chain lock system for turret is disclosed. According to an embodiment of the present invention, the chain lock system for turret comprises: a plurality of stoppers which fixes both chains by rotating, by the shafts, each of which is positioned between penetrating openings of a chain table where the chains penetrate; and a control unit which controls the stoppers.

Description

{CHAIN LOCKING SYSTEM USED FOR TURRET}

The present invention relates to a chain lock system for a turret.

Ships (offshore structures), such as floating production storage offshoring (FPSO) and floating storage offloading (FSO), perform operations while maintaining mooring position in the sea.

At this time, the turret mooring system moors the ship to the working position in the sea in such a manner that a chain or the like, which is lifted from the ship, is fixed to the sea floor. In addition, the turret mooring system allows the ship to rotate naturally around the turret when an external force is applied to the ship where the effects of waves, currents, winds, and debris are large and the sea conditions are poor.

Here, the turret protects the ship from the load due to the external force, and performs the role of the rotation axis of the ship in order to minimize the influence of the wind load and wave load applied to the ship. The turret also connects the ship with a riser, a mooring chain (hereinafter referred to as a chain), and the like.

The riser is a pipe that moves the oil, natural gas, etc. collected from the seabed well to the ship storage space. The riser may be fabricated in a soft, rigid, or hybrid structure. For example, a rigid riser may be implemented as a steel pipe with a double walled.

The chain is fixed on the sea floor to moor the vessel to the working position in the sea. Like the riser, the chain extends from the inside of the turret to the seabed through the through holes of the chain table provided at the bottom of the turret. The chain is tensioned by a winch installed on the chain deck of the turret and is fixed to the chain table by chain locking means provided corresponding to each chain on each of the through holes of the chain table on a one-to-one basis. For example, U.S. Patent No. 6,431,101 (Registered Aug. 13, 2002) discloses a technique related to a supporting device for fixing a chain.

However, since the locking means must be provided in a one-to-one correspondence relation to each chain disposed at a fixed position of the chain table, a cost is incurred, and there is an inefficiency in the locking method.

US Patent No. 6,431,101 (registered on Aug. 13, 2002)

An embodiment of the present invention is a chain lock for a turret, which is capable of performing effective locking (fixing) for each chain passing through a chain table of a turret via a plurality of stoppers rotated by a rotation axis interposed between respective through- System.

According to an aspect of the present invention, there is provided a chain stopper comprising: a plurality of stoppers which are rotated by rotation shafts interposed between respective through-holes of a chain table through which a chain passes to fix the chain disposed on both sides; And a control unit for controlling the operation of the stopper.

The stopper is provided in a bar shape and can rotate under the control of the control unit to support the lower portion of the link fastening portion of the chain disposed on both sides.

A guide tube provided below the through-hole for guiding the chain, and a guide track provided inside the guide tube, the guide track having a sliding groove into which the link of the chain is inserted so that the chain passes through the through- .

The link of the chain includes a first link and a second link that is crossed with the first link, and the guide track is formed on one inner side of the guide tube so that one side of the link is inserted. Or may be formed on the inner side of the guide tube so that both sides of the link are inserted or may be formed on the periphery of the guide tube such that both sides of the first link and the second link are inserted.

The stopper may include a fixing bar on at least one side thereof, and an operating part for pressing and fixing the chain by operating the fixing bar.

One side of the stopper includes the fixing bar and the actuating part for operating the fixing bar, and the other side of the stopper can form an insertion groove into which the fixing bar of the other stopper is inserted.

The fixing bar of the first stopper is inserted into the insertion groove of the second stopper disposed at the front end through the link of the first chain and the third stopper disposed at the rear end through the link of the second chain is inserted into the insertion groove of the first stopper. So that the chain disposed on both sides of the first stopper can be fixed.

Wherein the stopper includes a first stopper on both sides of which a securing bar and an actuating part for operating the securing bar are respectively provided and a second stopper on both sides of which the inserting groove for inserting the securing bar is formed, May be arranged alternately between the respective through-holes of the chain table.

The control unit may rotate the stopper by the rotation shaft to fix the chain disposed on both sides of the stopper when the chain receives information set at a set point with a predetermined tension.

The control unit may control the operation of the fixed bar by the actuating unit on the basis of the rotation information of the rotation axis sensed by the rotation sensing sensor .

A chain lock system for a turret according to an embodiment of the present invention includes an effective locking (fixing) operation for each chain passing through a chain table of a turret via a plurality of stoppers rotated by rotation shafts interposed between respective through- Can be performed.

1 is a cross-sectional view of a ship having a lock system for a turret according to an embodiment of the present invention.
2 is a cross-sectional view of the chain lock system of FIG.
3 is a cross-sectional view illustrating the operation of the chain lock system of FIG.
FIG. 4 is a cross-sectional view of another example of a stopper included in the chain lock system of FIG. 2. FIG.
5 and 6 are cross-sectional views illustrating still another example of the shape and operation of the stopper provided in the chain lock system of FIG.
FIG. 7 is a cross-sectional view of a guide pipe and a guide track included in the chain lock system of FIG. 2. FIG.
8 is a block diagram illustrating a control operation of the chain lock unit according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

Referring to Figs. 1 and 2, the marine turret mooring system 1 can moor the vessel to a working position in the sea. Here, the ship includes floatable structures that can be moved at sea, such as floating oil production and storage facility (FPSO) or floating storage facility (FSO), and can be moved on demand. In addition, the turret mooring system 1 can cause the ship to rotate in a moored state around the turret 20 when an external force acts on the ship due to the influence of waves, currents, winds,

Here, the turret 20 is supported by an upper bearing (not shown) provided on the upper side of the door frame 10 of the hull 2 penetrating up and down. The turret 20 also includes a FTS (Fluid Transfer System) 6 for transferring process fluid and other signals from the turret 20 to the process plant, typically as a multi-swivel assembly on the top side, And a TTS (Turret Transfer System) 5 that provides a link connecting the FTS 6 and the turret 20.

The turret 20 is provided with a chain table 30 for binding the column 23 connecting the hull 2 and the seabed surface or the seabed well. Column 23 may include one or more of riser 7, Umbilical (not shown) and mooring chain 8.

Here, the chain 8 is fixed to the sea bed so as to moor the ship to a working position in the sea, and is extended to the seabed through the chain table 30. The chain 8 is fixed at one side to a chain deck (not shown) inside the turret 20 and extended to the sea floor through the through holes H of the chain table 30 and fixed to the sea floor at the other side . A winch (not shown) is provided on the chain deck (not shown) so that the chain 8 can maintain a constant tension. The chain (8) is fixed to the chain table (30) by a chain lock system. The chain lock system according to the embodiment of the present invention includes a plurality of stoppers 44, a guide tube 50, a guide track 60, and a control unit.

The stopper 44 is rotated by a rotary shaft 42 interposed between the through holes H of the chain table 30 through which the chain 8 passes and fixes the chain 8 disposed on both sides. Here, the rotating shaft 42 may be disposed at a central position between the through holes H, and is rotated by the driving device 40. The driving device 40 may include, for example, a hydraulic device, a motor, and the like.

As shown in FIG. 3, the stopper 44 may be provided in a bar shape and rotates by the rotation shaft 42 to support the lower portion of the fastening portion of the link 9 of the chain 8. At this time, the bar-shaped stopper 44 may be bent to correspond to the curvature of the chain table 30. That is, when each of the through-holes H of the chain 8 is circularly formed in the periphery of the chain table 30, the stopper 44 has a shape corresponding to the curvature of the chain table 30, ) Fixing can be performed.

 4, the above-described stopper 44 may be provided in a form including another fixed bar 46 and an actuating part 47 for operating the fixed bar 46 as another example. At this time, one side of the stopper 44 is provided with a fixing bar 46 operated by the operating part 47, and the other side of the stopper 44 can form an insertion groove 44h.

In this case, the fixing bar 46 of the first stopper 44a is inserted into the insertion groove 44h of the second stopper 44b disposed at the front end, and the insertion groove 44h of the first stopper 44a is inserted into the rear end The fixing bar 46 of the third stopper 44c disposed on the first stopper 44 can be inserted and the chain 8 on both sides of the first stopper 44 can be fixed. At this time, the fixing bars 46 of the first and third stoppers 44a and 44c can be inserted into the insertion grooves 44h of the corresponding stoppers 44b and 44a through the link hole H2 of the chain 8 have.

5 and 6, the above-described stopper 44 may be further provided with a first stopper 44a having a fixed bar 46 operated by an operating portion 47 on both sides thereof, And a second stopper 44b having an insertion groove 44h into which the fixing bar 46 is inserted. At this time, the first stopper 44a and the second stopper 44b may be disposed alternately between the through holes H of the chain table 30. [ The fixing bar 46 of the one stopper 44a can be inserted into the insertion groove 44h of the second stopper 44b through the link hole H2 of the chain 8.

4 to 6, when each of the stoppers 44 is provided with the fixed bar 46 operated by the operating portion 47 on both sides thereof, the fixing bar 46 is provided with the link 9 of the chain 8 The chain 8 can be fixed. In this case, the above-described insertion groove 44h of each stopper 44 may be omitted. This is useful when the hole (H2) is not formed in the link (9) of the chain (9) depending on the kind of the chain (8).

3 and 6, only the chain 8 is disposed on the chain table 30 for convenience of explanation. However, a common riser 7 (see Fig. 1) and the like are provided on the chain table 30 together . Although the chains 8 are arranged at regular intervals in the circular chain table 30 as an example, the chain table 30 can be manufactured in various other forms, As shown in FIG.

2 and 7, the guide tube 50 is provided under the through hole H of the chain table 30 to guide the chain 8.

The guide track 60 is provided inside the guide tube 50 and has a sliding groove 60h into which the link 9 of the chain 8 is inserted so that the chain 8 passes through the through hole H . Here, the chain 8 may be provided with a first link 9a and a second link 9b which is fastened to the first link 9a in an intersecting manner.

The first link 9a of the link 9 of the chain 8 extending to the seabed through the through hole H of the chain table 30 is inserted into the sliding groove 60h of the guide track 60 The stopper 44 is able to support the lower portion of the fastening portion of the link 9 of the chain 8 by the rotation of the rotating shaft 42 as shown in Fig.

7 (a), the guide track 60 having the sliding groove 60h is formed on one inner side of the guide tube 50 so that one side of the link 9 is inserted therein . 7 (b), the guide track 60 in which the sliding groove 60h is formed is formed so as to correspond to the inside of the guide tube 50 so that either side of the link 9 is inserted. . 7 (c), the guide track 60 having the sliding groove 60h is inserted into the guide tube 50 such that the first link 9a and the second link 9b intersect with each other, As shown in Fig. At this time, the sliding groove 60h may have a '┼' shape.

Although the first link 9a is inserted into the sliding groove 60h in FIGS. 7A and 7B, the second link 9b may be inserted into the sliding groove 60h have. At this time, when the stopper 44 is rotated by the rotation shaft 42 as shown in Fig. 2, the end of the stopper 44 and the link 9 of the chain 8, which is guided by the guide track 60, It can be arranged so as not to be collided by interference.

As a result, the first stopper 44a and the second stopper 44b, which are rotated in accordance with the rotation of the rotating shaft 42, are engaged with each other, so that the chain 8 can be more firmly fixed.

Referring to FIG. 8, the control unit 70 controls the operation of the stopper 44 to fix the chain 8 on both sides of the stopper 44. The control unit 70 receives the control signal from the external device 80 and controls the operation of the driving unit 40 so that the stopper 44 can be rotated by the rotating shaft 42. [ For example, when the chain 8 is positioned at a set point with a predetermined tension by a winch (not shown), the control unit 70 receives the information from the external device 80 and operates the driving device 40. Whereby the rotation shaft 42 is rotated and the stopper 44 is rotated. 2 and 3 described above.

In addition, the control unit 70 can push the fixed bar 46 by the above-described operation unit 47 to fix the both chain 8. Here, a rotation sensor 49 for sensing the rotation state of the rotary shaft 42 may be attached to the stopper 44. In this case, the control unit 70 can control the operation of the fixed bar 46 by the operation unit 47 based on the rotation information of the rotation shaft 42 detected by the rotation detection sensor 49. That is, when the rotation shaft 42 is rotated, the control unit 70 pushes the fixing bar 46 of the stopper 44 by the operation unit 47 so that the both side chains 8 are fixed. Please refer to FIG. 4 to FIG. 7 described above. The control unit 70 does not limit the installation position thereof, so it is not shown in the drawing.

Each of the components shown in FIG. 8 may be composed of a kind of 'module'. The term 'module' refers to a hardware component such as software or an FPGA (Field Programmable Gate Array) or an application specific integrated circuit (ASIC), and the module performs certain roles. However, a module is not limited to software or hardware. A module may be configured to reside on an addressable storage medium and may be configured to execute one or more processors. The functionality provided by the components and modules may be combined into a smaller number of components and modules or further separated into additional components and modules.

The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

1: Ship 10:
20: turret 42:
44: stopper 49: rotation sensor
50: guide tube 60: guide track
70:

Claims (10)

CLAIMS 1. A chain lock system for a turret which fixes a plurality of mooring chains fixed to a sea floor to a chain table of a turret,
A plurality of stoppers which are rotated by rotation shafts interposed between the respective through holes of the chain table through which the chain passes to fix the chain disposed on both sides; And
And a control unit for controlling the operation of the stopper,
Wherein one side of the stopper includes a fixing bar and an actuating part for operating the fixing bar and the other side of the stopper forms an insertion groove into which a fixing bar of another stopper is inserted through a link of the chain. The method according to claim 1,
Wherein the stopper is provided in a bar shape and rotates by the control unit to support the lower portion of the link engagement portion of the chain disposed on both sides. 3. The method of claim 2,
A guide tube provided under the through-hole to guide the chain,
Further comprising a guide track provided inside the guide tube and formed with a sliding groove into which the link of the chain is inserted so that the chain passes through the through hole in a predetermined form. The method of claim 3,
Wherein the link of the chain includes a first link and a second link that is crossed with the first link,
The guide track may be formed on the inner surface of the guide tube so that one side of the link is inserted, or may be formed to correspond to the inside of the guide tube so that either side of the link may be inserted, And both sides of the second link are inserted in the periphery of the guide tube. delete delete The method according to claim 1,
The fixing bar of the first stopper is inserted into the insertion groove of the second stopper disposed at the front end through the link of the first chain and the third stopper disposed at the rear end through the link of the second chain is inserted into the insertion groove of the first stopper. And a chain disposed on both sides of the first stopper is fixed. CLAIMS 1. A chain lock system for a turret which fixes a plurality of mooring chains fixed to a sea floor to a chain table of a turret,
A plurality of stoppers which are rotated by rotation shafts interposed between the respective through holes of the chain table through which the chain passes to fix the chain disposed on both sides; And
And a control unit for controlling the operation of the stopper,
Wherein the stopper includes a first stopper provided on both sides thereof with a fixing bar and an operating portion for operating the fixing bar,
And a second stopper having insertion grooves through which the fixing bars of the first stopper are inserted through links of the chain on both sides,
Wherein the first stopper and the second stopper are arranged alternately between the respective through-holes of the chain table. The method according to claim 1 or 8,
Wherein the control unit rotates the stopper by the rotation shaft to fix the chain disposed on both sides of the stopper when the chain receives information set at a set point with a certain tension from the external device. The method according to claim 1 or 8,
Further comprising a rotation detection sensor for detecting a rotation state of the rotation shaft,
Wherein the control unit controls the operation of the fixed bar by the operation unit on the basis of rotation information of the rotation axis detected by the rotation detection sensor.

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