KR102055400B1 - Method for mounting thruster of ship in dock - Google Patents

Abstract

A method of mounting in a dock of a marine thruster is disclosed. In-dock mounting method of the thruster according to the present invention comprises the steps of placing the thruster in the dock; Installing a plurality of tower supports around the thruster; Mounting the hull block to which the thruster mounting block is coupled to the tower support; And mounting the thruster to the thruster mounting block of the hull block, thereby securing work air by mounting the thruster in the dock, thereby eliminating the additional work such as underwater work and dredging work. Separate thrusters for installing thrusters on relatively small blocks by reducing thrust, reducing the risk of accidents and reducing operator fatigue, and by mounting thrusters to relatively large hull blocks such as PE blocks in the dock. The mounting step can be omitted, resulting in a shortening of the air, and the additional space for performing this separate thruster mounting step is unnecessary, thereby increasing the space utilization of the shipbuilding, and simultaneously or multiple thrusters on the hull block. It can be mounted sequentially so that the time required for mounting the thruster You can save effort.

Description

Mounting method of dock of ship thruster {METHOD FOR MOUNTING THRUSTER OF SHIP IN DOCK}

The present invention relates to a method for mounting in a dock of a ship thruster, and more particularly, to mount in a dock of a ship thruster for mounting a thruster used for propulsion of a ship or control of the position of a ship in a dock. It is about a method.

In general, ships in ships are equipped with drilling equipment suitable for the development of subsea oil fields, and can be driven by its own power. In addition, the drilling line is provided with a magnetic position control system for stably maintaining its position at a certain drilling point.

The thruster used to control the position of the drilling vessel is a thruster, which is generally assembled in the thruster room receptacle and the motor after launching the drilling vessel.

The thruster room is formed in the drilling line, and the upper structure of the thruster is mounted below the thruster room. The upper structure of the thruster is equipped with shock-resistant parts such as hydraulic pipes, lubricant pipes, steering gears, etc., and these parts may be damaged even with a slight impact, so that the thruster is installed in the thruster room. Special care must be taken when handling thrusters.

In the method of mounting a marine thruster according to an embodiment of the prior art, the thruster is installed using a crane of a barge at sea. In this case, while the thruster is suspended on the rope of the crane installed on the barge, the thruster is hung on the lifting rope which is connected to the rope of the winch installed on the upper part of the drilling vessel through the rope connector to obtain the thruster underwater.

Then, the winch installed on the drilling vessel is operated to pull the lifting rope to place the obtained thruster directly under the thruster room and then lift it up. At this time, the lifting rope of the winch is installed to pass through the thruster room and come out below. However, in this case, it is difficult to grasp the center of gravity of the thruster because the load direction of the weight of the thruster itself and the pulling direction of the lifting rope are not aligned with each other. Therefore, if you do not grasp the center of gravity of the thruster when pulling the thruster, the thruster will shake. When the thruster is shaken, the parts installed on the upper part of the thruster are damaged by the rope of the crane installed on the barge and the lifting rope of the drilling ship, and to prevent this, when pulling the lifting rope of the drilling ship, The center of gravity should be pulled while keeping the installed parts in a horizontal position.

Thus, in order to pull the thruster while keeping the center of gravity so that the parts are located at the top, it must be able to precisely adjust the lifting rope to raise the thruster by three lifting ropes. There is a limit to precisely adjusting each up and down.

Therefore, in the past, the thruster was obtained in a depth of 50 meters or more deeply, and then the thruster was pulled upward by a lifting rope of a drilling ship. While working on the dock's quay, the drilling ship must be moved to a distant sea of more than 50 meters in depth, or dredging is required at the bottom of the quarry to ensure depth, which not only increases work duration and costs, but also By increasing the difficulty of work there is a problem that the risk of safety accidents and worker fatigue increases.

The above-described technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

Korea Patent Publication No. 2009-0101989 (Daewoo Shipbuilding & Marine Engineering Co., Ltd.) 2009. 09. 30.

The present invention is to solve the conventional problems as described above, to ensure the working air by mounting the thruster in the dock, to reduce the amount of work by eliminating the additional work such as underwater work and dredging work, It is to provide a method of mounting in the dock of the marine thruster that can reduce the risk and fatigue of the operator.

According to one aspect of the invention, a step of placing a thruster in the dock; Installing a plurality of tower supports around the thruster; Mounting the hull block to which the thruster mounting block is coupled to the tower support; And mounting the thruster to the thruster mounting block of the hull block may be provided in the dock mounting method of the ship thruster.

Positioning the thruster may be a dry dock or a floating dock.

Arranging the thruster may be arranged to arrange a plurality of thrusters for mounting on the hull block.

The step of installing the tower support is such that the top height of the tower support having the lowest height among the plurality of tower support is higher than the top height of the thruster, so that a clearance space is provided between the hull block and the thruster. can do.

Mounting the hull block on the tower support may be a pre-Erection (PE) block.

Mounting the hull block on the tower support may form the hull block or the stern of the hull block.

Mounting the hull block to the tower support may be any one of the target vessel of the hull block is a merchant ship, drilling vessel, semi-submersible rig ship, floating offshore structure.

The method may further include testing whether air is leaked in an area where the thruster is in contact with the thruster mounting block before the mounting of the thruster.

The mounting of the thruster may be such that the thruster is lifted by the strand jack provided in the hull block to be mounted on the hull block.

According to another aspect of the present invention, the thruster used for the propulsion of the ship or the control of the magnetic position in the dock, the thruster mounting block after coupling the thruster mounting block for mounting the thruster to the hull block in advance A docking method of a ship thruster for mounting the thruster may be provided.

According to the present invention, by mounting the thruster in the dock to ensure the work air, by reducing the amount of work by eliminating the additional work such as underwater work and dredging work, it is possible to reduce the risk of accidents and worker fatigue, Mounting the thrusters in relatively large hull blocks, such as PE blocks, in the dock allows for a reduction in air by eliminating the separate thruster mounting step for installing thrusts in relatively small blocks. No additional space is required to perform the stirrer mounting step, which can increase the space utilization of shipbuilding, and it is possible to mount multiple thrusters on the hull block simultaneously or sequentially so that the time and effort required for mounting the thrusters can be saved. Can be reduced.

1 is a view schematically showing a state in which a thruster is installed in a ship in an embodiment of the present invention.
2 is a view for sequentially explaining a method for mounting in a dock of a ship thruster according to an embodiment of the present invention.
FIG. 3 is a diagram schematically illustrating a step of moving a thruster to an area in a dock in one embodiment of the present invention.
4 is a diagram schematically illustrating a step of providing a tower support around a thruster seated in a dock in an embodiment of the present invention.
FIG. 5 is a diagram schematically illustrating the raising of a thruster using a strand jack in an embodiment of the present invention.
FIG. 6 is a view schematically illustrating a state in which an upper dome and a protective cap are separated after a test for air leakage in an upper region of a thruster mounted to a thruster mounting block in an embodiment of the present invention.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a view schematically showing a state in which a thruster is installed in a ship in an embodiment of the present invention.

As shown in FIG. 1, in this embodiment, a thruster 10 used for controlling the position of a ship in the ship is provided in the hull block 21 forming the stern of the hull H, or the hull H. It may be provided in the hull block 22 forming a bow of the ship, the ship including the hull (H) may include a merchant ship, drilling ship, semi-submersible rig ship or floating offshore structure, hereinafter hull (H) The hull block 21 constituting the stern of the will be described as an example.

2 is a view for sequentially explaining a method for mounting in a dock of a ship thruster according to an embodiment of the present invention.

As shown in FIG. 2, the in-dock mounting method of the ship thruster according to the embodiment of the present invention mounts the thruster 10 used in the propulsion of the ship or the magnetic position direction control in the dock D. However, the thruster mounting block for mounting the thruster 10 is previously coupled to the hull block 21, and then the thruster 10 is mounted on the thruster mounting block, for example, in the dock D. Arranging the thruster (10), installing the plurality of tower supports (30) around the thruster (10), and the hull block (21) to which the thruster mounting block is coupled to the tower support (30). And mounting the thruster 10 to the thruster mounting block of the hull block 21.

As shown in FIG. 2A, the disposing of the thruster 10 is a step of moving the thruster 10 to a specific region in the dock D in which the thruster 10 is to be placed. Here, the dock D may be a dry dock or a floating dock. In addition, when the thruster 10 is disposed in the dock D, all the plurality of thrusters 10 to be mounted on the hull block 21 correspond to the mounting positions of the thrusters 10 of the hull block 21. By arranging as much as possible, a plurality of thrusters 10 mounting work on the hull block 21 can be performed simultaneously or sequentially.

In order to transfer the thruster 10 to a specific area in the dock D, the thruster 10 is transported to a position defined by a transporter T, as shown in FIG. The crane C can be mounted in a specific area in the dock (D). In addition, the thruster 10 may be transported by a sailing jig (SJ) provided in the transporter T after being pre-seated in the cradle (CD).

The step of installing the tower support 30 is such that the hull block 21 disposed on the upper side of the thruster 10 seated in a specific area in the dock D is spaced a certain height from the bottom surface in the dock D. It is a step of installing the supporting tower support 30 around the thruster (10).

In this embodiment, the tower support 30 is a structure provided by coupling a plurality of horizontal frames and vertical frames to each other. As shown in FIG. 4, a plurality of tower supports 30 may be installed around the thruster 10. In addition, the tower support 30 may be configured to have a different height of the uppermost end to have a bearing force corresponding to the lower shape of the hull block 20. At this time, the top height of the tower support 30 having the lowest height among the plurality of tower supports 30 is higher than the top height of the thruster 10, and thus, between the hull block 21 and the thruster 10. Free space can be provided. Accordingly, when the hull block 21 is supported by the tower support 30, the parts provided on the upper side of the thruster 10 are prevented from being damaged due to the collision between the hull block 21 and the thruster 10. In addition, to facilitate the coupling operation of the hull block 21 and the thruster (10). The height H of the free space may be, for example, 10 to 50 cm, but is not necessarily limited thereto, and may be changed as necessary.

As shown in (b) and (c) of FIG. 2, the step of mounting the hull block 21 to the tower support 30 may include a hull block 21 to which a thruster mounting block for mounting the thruster 10 is coupled. ) Is an example of mounting the tower support 30 using a crane. In the hull block 21, the seat portion 21a for mounting the thruster 10 is formed in advance in the thruster mounting block. In addition, the hull block 21 may be a PE (Pre-Erection) block. Here, the PE block is a block manufactured by PE (Pre-Erection) operation that combines the blocks including the thruster mounting block, for example, can be mounted at the same time by integrating several small blocks to build the ship Try to save time.

In addition, as shown in FIG. 1, the hull block 21 may form the stern of the hull H, whereas the hull block 22 may form the bow of the hull H as described above. In addition, the target ship of the hull block 21, that is, the ship to be built by the hull block 21 may be any one of a merchant ship, a drilling ship, a semi-submersible rig ship, a floating offshore structure, but is not limited thereto. Any ship or offshore structure that requires mounting of the thruster 10 may be included.

In the mounting of the thruster 10, for example, the thruster 10 may be lifted by a strand jack provided in the hull block 21 to be mounted on the hull block 21. As shown in FIG. 5 as in the present embodiment, the strand jack 40 may be provided on the deck of the hull block 21 or on the upper side of the thruster mounting block 21b, and the strand 41 may be disposed in the thruster ( The thruster 10 is raised in the vertical direction by connecting to the upper side of 10). Here, the strand jack 40 may be provided in plural, and the thruster 10 may be vertically raised while precisely adjusting the strands 41 connected to the respective strand jacks 40 vertically. It is also possible to separate the cradle CD (shown in FIG. 4) from the thruster 10 before and after raising the thruster 10 to the thruster mounting block 21b.

Meanwhile, the method may further include testing whether air is leaked in a region where the thruster 10 and the thruster mounting block 21b contact before the mounting of the thruster 10. In this embodiment, this air leakage test step is a leak occurs in the contact area of the thruster 10 and the thruster mounting block 21b during the operation of the ship so that seawater flows into the hull H (shown in FIG. 1). It can be done in advance to block that. In addition, as shown in FIG. 6, the air leakage test step includes mounting the thruster 10 to the thruster mounting block 21b (shown in FIG. 5) and then contacting the thruster mounting block 21b. After sealing the upper region of the upper portion with the upper dome 50, the air is supplied to the sealed region, and then the test may be performed to test the leakage of the supplied air.

In addition, a protective cap 60 may be installed to protect a component provided at an upper side of the thruster 10 during the air leakage test. When the air leakage test is completed, the upper dome 50 and the protective cap 60 It is separated from the stirrer 10.

Meanwhile, when the thruster 10 is mounted on the hull block 21, the process of coupling the hull block 21 on which the thruster 10 is mounted to the remaining hulls is performed.

As described above, the present embodiment, unlike one embodiment of the prior art, by installing the thruster in the dock to secure the working air to prevent delivery delay, by omitting additional work such as underwater work and dredging work It reduces the volume of work and reduces the risk of accidents and worker fatigue.

In addition, by attaching the thruster to a relatively large hull block such as a PE block in the dock, it is possible to omit a separate thruster mounting step for installing the thrust in a relatively small size block, resulting in a shortening of air. No additional space is required to carry out the thruster mounting step, thus increasing the space utilization of the shipbuilding.

In addition, since a plurality of thrusters can be mounted on the hull block simultaneously or sequentially, the time and effort required for mounting the thrusters can be reduced.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

10: thruster 21,22: hull block
21a: seat portion 21b: thruster mounting block
30: tower support 40: strand jack
41: strand 50: upper dome
60: protective cap C: crane
CD: Cradle D: Dock
H: Hull SJ: Sailing Jig
T: Transporter

Claims (10)

Arranging a thruster in a dock; installing a plurality of tower supports around the thruster; mounting a hull block coupled with a thruster mounting block to the tower support; and thrust of the hull block Mounting the thruster to a stirrer mounting block;
And testing whether the air leaks in an area in which the thruster and the thruster mounting block come into contact with each other prior to the mounting of the thruster. The method of claim 1, wherein disposing the thruster,
The dock of claim 1, wherein the dock is a dry dock or a floating dock. The method of claim 1 or 2, wherein the disposing of the thruster,
And a plurality of thrusters arranged to be mounted on the hull block. The method of claim 1, wherein the step of installing the tower support,
The top of the tower support having the lowest height among the plurality of tower supports
The height of the thruster is higher than the height of the top, so that the space between the hull block and the thruster provided in the dock of the ship thruster, characterized in that the dock. The method of claim 1, wherein the mounting of the hull block to the tower support,
The ship block mounting method of the ship thruster, characterized in that the hull block is a PE (Pre-Erection) block. The method according to claim 1 or 5, wherein the step of mounting the hull block to the tower support,
And the hull block forms a bow or stern of the hull. The method according to claim 1 or 5, wherein the step of mounting the hull block to the tower support,
The target ship of the hull block is any one of a merchant ship, a drilling ship, a semi-submersible rig ship, a floating offshore structure, the method of mounting in the dock of the ship thruster. delete The method of claim 1, wherein the mounting of the thruster,
And the thruster is lifted by the strand jack provided in the hull block to be mounted on the hull block. Mount the thruster used in the propulsion of the ship or control the magnetic position in the dock, the thruster mounting block for mounting the thruster is pre-coupled to the hull block, and then the thruster is mounted on the thruster mounting block,
And testing whether the air leaks in an area where the thruster is in contact with the thruster mounting block before mounting the thruster.

Images