KR101399936B1 - Leg guide for floating structure - Google Patents

Abstract

A leg guide of a floating structure is disclosed.
A leg guide of a floating structure according to the present invention comprises a first guide frame coupled to a main body of a floating structure and having a groove portion and a first mold engagement portion; A ware plate having a second mold engaging portion fitted in the groove portion and formed in the first mold engaging portion; And a second guide frame that is disposed adjacent to the first guide frame while covering a part of the wear plate, and is coupled to the main body.

Description

[0001] LEG GUIDE FOR FLOATING STRUCTURE [0002]

The present invention relates to a leg guide of a floating structure.

As the demand for environmentally friendly energy development grows, the development using wind power generators is getting popular all over the world. However, installation of wind turbines requires strict environmental conditions. For example, the place where the wind turbine is installed should be a place where a certain level of wind speed can be guaranteed to obtain significant rotation of the blade, and the pollution caused by the noise generated when driving the wind turbine should not be an issue do. Even if the environmental conditions are satisfied, there is a problem that a very large area of space is required for installing the wind turbine generator.

In recent years, interest in offshore wind turbines has increased, which is relatively free from the above-mentioned constraints. Offshore wind turbines can be installed in a variety of ways, but generally they are constructed by dividing the components into several units, making them on land, and then transferring the units to sea for assembly.

A ship that moves offshore wind turbine units on the sea to the sea and installs offshore wind turbine generators is commonly referred to as a wind turbine installation vessel (WTIV).

Wind turbine installation The ship can be operated in the transit mode and the jack-up mode due to the nature of the operation. Specifically, the ship installed with the wind turbine moves to the navigation mode to the position where the off-axis wind turbine is to be installed. In sailing mode, the legs can be moved upward to reduce resistance by seawater. After that, the ship installed with the wind power generator is switched to the jack-up mode, the leg is lowered into the sea floor, and then the main body is lifted up along the leg so that the main body is separated from the sea level by a certain distance. When the main body reaches a certain position, the wind turbine installation ship stops the movement of the main body and installs the offshore wind turbine generator. When the installation is completed, proceed in the reverse order to move to the next installation position.

However, the above-described conventional techniques have the following problems.

In the floating structure, leg-wells or leg-supporting portions of the main body through which the legs pass through the body are provided with plate-shaped leg guides by welding.

Particularly, since the leg guide plays a role of guiding the movement of the legs in the ascending and descending direction of the legs, it is necessary to provide the airtight gap so as not to be an obstacle of the legs.

That is, in order to precisely guide the very large leg with the leg guide, the coupling tolerance with respect to the gap between the leg and the leg guide requires very high accuracy. However, when the installer places the leg guide at the corresponding installation position It is very difficult to adjust the distance between the legs and the leg guides within the allowable range in accordance with the welding deformation of the leg guides.

That is, since the leg guide itself is fixed to the plate of the main body by welding, when the leg guide is deformed due to welding, there is a disadvantage that a highly complicated post-welding repair work such as correcting the deformed part by grinding is required .

Particularly, since the space where the leg guides are installed is a space between the plate and the legs of the main body, the installation space is narrow and the operation becomes difficult, and it is difficult to manage the degree of installation (e.g., precision).

US Patent Publication No. US2010_0293781

In this embodiment, a wear plate that requires a very high degree of accuracy (accuracy) can be easily installed in the guide frame as a sliding fitting structure, and the wear plate can be stably fixed by the coupling between the shapes of the wear plate and the guide frame, To provide a leg guide of the floating structure.

According to an aspect of the present invention, there is provided a method of manufacturing a structure, comprising: a first guide frame coupled to a main body of a floating structure, the first guide frame having a groove portion and a first mold- A ware plate having a second mold engaging portion fitted in the groove portion and formed in the first mold engaging portion; And a second guide frame disposed adjacent to the first guide frame and surrounding the part of the wear plate, the second guide frame being coupled to the main body.

In addition, the first guide frame or the second guide frame may be separated from the main body.

The first mold-joined portion and the second mold-joined portion may include a serrated or concave-convex shape to be mutually combined.

In addition, the wear plate may have a cross-section of cross-sectioned light.

Further, the second guide frame may have a fitting jaw corresponding to the outer rim of the cross-section of the weak light of the wear plate.

The first guide frame may be formed as a straight frame, and the second guide frame may be formed as a C-shaped frame, and may have a rectangular ring shape when coupled to the wear plate.

According to the embodiment of the present invention, as a component which is in sliding contact with the leg, welding is not performed to a wear plate requiring a very high degree of engagement tolerance management, thereby preventing deformation of the wear plate There is an advantage that the gap between the leg and the wear plate can be adjusted very easily within an allowable range.

In the embodiment of the present invention, the first guide frame is fixed in advance, the wear plate is fitted in the first guide frame, and the wear plate and the first guide frame are made to cooperate with each other by using the mold parts corresponding to each other, So that the fitting state between the plate and the first guide frame can be stably maintained.

The embodiment of the present invention is advantageous in that accurate and quick leg guide installation can be realized by fixing the second guide frame to the rim of the wear plate and fixing it with bolts.

The embodiment of the present invention is advantageous in that the wear plate can be easily replaced by the bolt coupling of the second guide frame.

1 is a side view of a floating structure showing the installation position of the leg guide of the present invention.
2 is an exploded perspective view of the leg guide shown in Fig.
3 is an exploded perspective view of the leg guide shown in Fig.
4 is a cross-sectional view taken along line AA of FIG.
5 is a cross-sectional view taken along line BB in Fig. 2; Fig.
FIGS. 6 to 8 are front views for explaining a method of installing the leg guide shown in FIG. 2;

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the body means a hull or the like of a floating structure, and may be abbreviated as a main body hereinafter.

1 is a side view of a floating structure showing a mounting position of a leg guide of the present invention.

Referring to FIG. 1, a floating structure 1 according to an embodiment of the present invention includes a main body 10 capable of floating in water, a leg well 50 extending through the main body 10 in a vertical direction And leg supports 30 that relatively move the legs 20 and the main body 10 in the vertical direction and support the legs 20.

The floating structure 1 may be a wind turbine installation vessel (WTIV) or a jack-up platform. In this embodiment, the floating structure 1 is a wind turbine installation vessel I'll explain it to you. However, the spirit of the present invention is not limited to this, and any floating structure having a jack-up mode to be described later may be included in the scope of the present invention.

The body 10 may have a planar structure of a floating rectangular shape as shown in FIG. 1, and may be formed in a structure having a wide width, a low height, and a short length as compared with a general commercial line (for example, a container line) . However, this is merely an example, and the body 10 according to the teachings of the present invention may have any three-dimensional structure in which the legs 20 and the leg supports 30 can be installed.

The main body 10 can be loaded with a load according to the function of the floating structure 1. In the case of the present embodiment, the main body 10 can be loaded with blade, nacelle, tower, or the like, which is a part of an offshore wind power generator, as a load.

In addition, the main body 10 may be provided with a propulsion device (not shown) for movement and position control.

A plurality of legs 20 may be provided depending on the purpose of use of the floating structure 1. In the embodiment of the present invention, a total of four legs 20 are provided, one pair at each of the port and starboard sides of the main body 10 I will explain what is provided as an example.

The leg 20 is installed to penetrate the main body 10 in a vertical direction and the main body 10 is formed with a leg well 50 through which the leg 20 passes. The legs 20 can be moved downwardly of the main body 10 and fixed to the seabed so that they are rigid enough to withstand the load of the main body 10 in a jack-up state, Structure and the like. In the present embodiment, the legs 20 are formed in a triangular truss structure.

The leg support portion 30 is provided at a position corresponding to the leg well 50 so that the leg 20 can pass therethrough and the leg support portion 30 is provided at a position corresponding to the leg well 20, . Specifically, the leg supporting portion 30 may include a jack case corresponding to a driving device provided with a motor, a pinion gear, or the like.

The main body 10 may be provided with a crane 40 capable of installing the offshore wind power generator by transporting the load 2 such as a blade, a nacelle, or a tower.

The jack case may be a driving device for moving up and down the legs 20 or for moving up and down the main body 10 by the relative movement with the legs 20. [ The operation of the jack case causes the legs 20 to move up and down with respect to the main body 10 or after the legs 20 are fixed to the underside B, That is, can be moved up and down. For example, the jack case of the leg support 30 is provided with a pinion gear and a motor, the leg 20 is provided with a rack gear 21 of a cord 22, and the pinion gear and the rack gear 21 are interlocked The relative movement of the leg 20 and the main body 10 in the vertical direction can be achieved.

The floating structure 1 having the above configuration can be operated in a transit mode and a jack-up mode.

The leg guide 100 may be installed in the main body 10 to guide the movement of the rack gear 21 of the leg 20.

More specifically, the leg guide 100 includes an upper guide disposed on the upper side of the jack case of the leg support portion 30 of the main body 10 and a lower guide disposed on the lower side of the jack case or the leg well 50 lower guide).

The leg guide 100 may include a wear plate that performs a substantially sliding contact with the rack gear 21 of the leg 20.

2 is an exploded perspective view of the leg guide shown in Fig.

Referring to FIG. 2, the leg guide 100 may include a wear plate 110, a first guide frame 120, and a second guide frame 130.

The wear plate 110 may play a role of guiding the movement of the rack gears of the legs while abiding by loads such as sliding friction, contact, etc. repeatedly or for a long time.

The wear plate 110 may be manufactured using a material used for manufacturing a plate-shaped bearing.

The first guide frame 120 may be formed as a straight frame. For example, the rectangular solid bar may be machined, or the groove 121 and the plurality of first crimping portions 122 may be formed by powder metallurgy or the like.

Here, the shape of the groove 121 may be formed to have an inner space capable of inserting the right side of the wear plate 110 and the upper and lower corners adjacent thereto.

The plurality of first crimping portions 122 are located in the groove portion 121 so that they can be fitted or joined to the second crimping portion 112 of the wear plate 110.

Although the first and second mold portions 122 and 112 are formed on the right side of the ware plate 110 and the first guide frame 120 corresponding to the first and second mold portions 110 and 120, And the second guide frame 130 as shown in FIG.

Also, the first guide frame 120 can be fixed to the body of the floating structure in correspondence with the installation position where the leg 20 can be guided.

For example, the leg body 20 may be provided with a leg well 50 for each leg. When the legs 20 are formed in a triangular truss structure, the leg wells can be formed in a triangular shape as a whole such that the cord serving as a pillar and its rack gear pass therethrough, May be formed.

The groove regions may be defined as both side walls spaced apart from each other at right angles at opposite sides of the inner wall. Typically, the wear plates 110 are disposed on both side walls of the groove region of the leg wells 50, Thereby guiding the rack gear 21 of FIG.

Therefore, the mounting position at which the legs 20 can be guided can be plates on both side walls of the groove areas of the leg wells 50 of the main body 10, and for ease of explanation, . ≪ / RTI >

At this time, the first guide frame 120 is fixed by bolts or welding (fixed by welding in FIGS. 2 to 7), and at this time, the first guide frame 120 can be precisely fixed corresponding to the design position.

In addition, since the first guide frame 120 is a separate component separated from the wear plate 110, it can be excluded from the high coupling tolerance management of the wear plate 110.

On the other hand, in order to be fixed by bolts, it is necessary to further process the bolt holes in the first guide frame 120 as well.

Thus, the first guide frame 120 can be fixed to the plate of the main body in advance before being coupled with the wear plate 110.

However, the first guide frame 120 may be configured to be detachable from the main body 10, for example, a plate of the main body 10 when using a bolt coupling or the like. That is, when the wear plate 110 is replaced, the first guide frame 120 or a second guide frame 130 to be described later can be separated from the main body.

The weld plate 110 is inserted into the groove portion 121 of the first guide frame 120 by welding without using welding so that the engagement tolerance between the wear plate 110 and the rack is not deformed by welding or the like .

That is, the wear plate 110 has a second fused portion 112 that is fitted in the groove portion 121 and is fitted to the first fused portion 122, The second guide frame 130 can be combined with the guide frame 120 and can be as shown in FIG.

The second guide frame 130 is disposed adjacent to the first guide frame 120 while covering a part of the wear plate 110, and can be coupled to the main body.

For example, the second guide frame 130 can be attached to the main body using a plurality of bolt holes and bolts formed in the second guide frame 130.

FIG. 3 is a perspective view of the combined leg guide shown in FIG. 2. FIG.

The thus assembled leg guide 100 is fixed to the plate of the main body of the floating structure by means of bolts so that the rack gear 21 of the leg 20 can be guided. It is not required to perform a post-treatment to match the bonding tolerance, so that the field installation work can be performed easily and quickly.

4 is a cross-sectional view taken along line A-A in Fig. 2, and Fig. 5 is a cross-sectional view taken along line B-B in Fig.

2 to 4, the first mold part 122 of the first guide frame 110 and the second mold part 112 of the wear plate 110 have a serrated or concave shape .

The second guide frame 130 may have a fitting jaw 131 corresponding to the outer rim of the cross-section of the welded plate 110.

Further, the second guide frame 130 may be formed as a U-shaped frame and may have a rectangular ring shape when engaged with the first guide frame 120.

At this time, the wear plate 110 may further have an inclined surface which is narrower in the upper surface than the bottom surface and slopes from the intermediate position of the outer surface toward the center.

4, even if the thickness H1 of the center portion of the weld plate 110 is made thicker than the thickness H2 of the first and second guide frames 120 and 130, The outer edge of the wear plate 110 may be fixedly mounted on the first and second guide frames 120 and 130.

That is, the wear plate 110 can be brought into contact first when the leg is in contact with the rack gear.

Hereinafter, a method of installing the leg guide 100 of the floating structure of the present embodiment will be described with reference to FIGS. 6 to 8. FIG.

As described above, the method of installing the leg guide 100 discloses a method of installing the leg guide 100 at the corresponding position of the main body 10. Here, the leg guide 100 includes a rack gear (not shown) of the leg 20 passing through the leg well 50 of the main body 10 in the up-and-down direction by the driving device of the leg supporting portion in the main body 10, (21).

6, the method of installing the leg guide 100 includes the step of fixing the first guide frame 120 to the plate 55 of the main body 10 at the opposite position of the rack gear 21.

Here, the plate 55 of the body 10 may refer to a structural member constituting both side walls of the groove region 55 of the leg well 50.

The first guide frame 120 can be fixed to the plate 55 of the main body 10 by welding. Of course, the first guide frame 120 may also be bolted to the plate 55 of the body by machining a bolt hole.

The plate 55 of the main body 10 may have a bolt hole 56 formed in advance in accordance with the design standard of the main body 10 for engaging the second guide frame 130.

Referring to FIG. 7, the method of installing the leg guide may include fitting the wear plate 110 into the groove 121 of the first guide frame 120.

At this time, the first mold overlap portion 122 of the groove 121 and the second mold overlap portion 112 of the wear plate 110 may be mutually formed.

At this time, since the first fused portion 122 of the groove 121 and the second fused portion 112 of the wear plate 110 can provide a relatively wide contact surface as compared with the simple groove inserting method, 120 and the wear plate 110 can be increased.

8, in the method of installing the leg guide, the fitting jaw 131 of the second guide frame 130 is superimposed on the outer rim of the cross-section of the bottom surface of the weld plate 110, (130) and the plate (55) of the main body.

Here, the second guide frame 130 contacts the side surface of the first guide frame 120 and has a rectangular ring shape, and is bolted to the other side of the plate 55 of the main body.

That is, when the bolts of the second guide frame 130 are disassembled, the wear plate 110 can be replaced.

Although the leg guide and the installation method of the floating structure according to the embodiment of the present invention have been described above as specific embodiments, the present invention is not limited thereto, and the present invention is not limited thereto, Should be interpreted as having a range of. Skilled artisans may implement a pattern of features that are not described in a combinatorial and / or permutational manner with the disclosed embodiments, but this is not to depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

100: leg guide 110: wear plate
120: first guide frame 130: second guide frame

Claims (6)

A first guide frame (120) coupled to the main body (10) of the floating structure (1) and having a groove part (121) and a first mold part (122);
A ware plate (110) having a second fused portion (112) fitted in the groove portion (121) and fused to the first fused portion (122); And
And a second guide frame 130 disposed adjacent to the first guide frame 120 while covering a part of the wear plate 110 and coupled to the main body 10,
The first guide frame 120 or the second guide frame 130 is separated from the main body 10
Leg guide of floating structure. delete The method according to claim 1,
The leg guide of the floating structure includes a serrated shape or a concave-convex shape for mutual formation of the first mold overlap portion (122) and the second mold overlap portion (112). The method according to claim 1,
Wherein the wear plate (110) has a cross-section of the convergent light. 5. The method of claim 4,
Wherein the second guide frame (130) has a fitting jaw (131) corresponding to an outline rim of a cross section of the welded plate (110). 6. The method of claim 5,
The first guide frame 120 is formed as a straight frame and the second guide frame 130 is formed as a U-shaped frame. When the first guide frame 120 is coupled to the wear plate 110, a floating structure Leg guide.

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