JP7637037B2 - Kick plate construction - Google Patents

Description

This disclosure relates to a kick plate structure provided on a transition piece platform.

JP 8-259148 A describes the structure of a kick plate attached to a platform. The platform forms the floor of the car. The car has side panels that form the sides of the car, and a return panel. The return panel is provided with a door that can be opened and closed freely to allow entry and exit to the car.

A pair of kick plates are provided between the lower ends of the side panels and the left and right ends of the platform. The lower ends of the kick plates are joined to the platform, and the upper ends of the kick plates are joined to the side panels. The kick plates extend vertically from their lower ends to the middle of their height, and from the middle of their height to their upper ends they are inclined so that they widen outwards towards the outside of the car.

Japanese Patent Application Publication No. 8-259148

The transition piece platform comprises multiple kick plates extending circumferentially and gratings arranged inside the kick plates. The multiple kick plates are joined to each other by bolts and nuts. If the bolts joining the multiple kick plates protrude inside the platform, there is a concern that the bolt heads may interfere with the grating. Therefore, it is necessary that the bolts do not interfere with the grating.

At least one of the multiple kick plates has a bolt hole through which the bolt passes, and the kick plates are joined by inserting the bolt into the bolt hole. However, since there may be minute manufacturing errors in the kick plate, if the bolt hole is circular, it may be difficult to pass the bolt through. As a result, there is a concern that the work of joining the kick plates may not be carried out efficiently.

The purpose of this disclosure is to provide a kick plate structure that avoids interference of bolts with the grating and allows efficient work to join the kick plate.

The kick plate structure according to the present disclosure is a kick plate structure provided on the platform of a transition piece. The kick plate structure includes a first kick plate and a second kick plate that extend along the circumferential direction of the platform and are joined to each other, and a splice plate that is fixed to the second kick plate and is joined to the first kick plate while straddling the first kick plate. The splice plate and the first kick plate are aligned along the radial direction of the platform. The splice plate has an insertion hole through which a countersunk bolt is inserted. The first kick plate has an elongated hole through which a countersunk bolt is inserted and that extends in the circumferential direction.

This kick plate structure includes a first kick plate and a second kick plate, and a platform is formed by arranging the first kick plate and the second kick plate. The kick plate structure includes a splice plate fixed to the second kick plate, and the splice plate is arranged to straddle the first kick plate. The splice plate is arranged to be aligned along the radial direction of the first kick plate and the platform, and has an insertion hole through which a flat head bolt is inserted. Therefore, the flat head bolt is inserted into the splice plate, so that the head of the bolt can be prevented from protruding inward. Therefore, even if a grating is arranged inside the platform, the flat head bolt does not interfere with the grating, so that interference of the bolt with the grating can be prevented. In addition, the first kick plate has a long hole through which the flat head bolt is inserted and which extends in the circumferential direction. Therefore, even if there is a manufacturing error in at least one of the first kick plate, the second kick plate, and the splice plate, the flat head bolt can be easily passed through the long hole. As a result, the work of joining the kick plates can be performed efficiently.

The kick plate structure may further include a grating provided on the outside of the transition piece. The first kick plate and the second kick plate may extend upward from the grating in a gap formed between the grating and the transition piece. In this case, the grating is provided on the outside of the transition piece, and the first kick plate and the second kick plate extend upward from the grating in the gap between the transition piece and the grating. If the first kick plate and the second kick plate are not provided, there is a concern that problems such as objects falling from the gap between the grating and the transition piece may occur. In contrast, if the first kick plate and the second kick plate extend upward from the grating in the gap, problems such as objects falling from the gap can be avoided.

At least one of the first kick plate and the second kick plate may have a grating support portion on which the grating is placed. In this case, by providing at least one of the first kick plate and the second kick plate with a grating support portion, the structure for supporting the grating can be simplified. Therefore, the work of placing the grating can be performed efficiently, which contributes to further improving workability.

The kick plate structure may include multiple beams that form a platform, and at least one of the first kick plate and the second kick plate may be fixed to the beams. In this case, the structure of the platform can be simplified by fixing the beams of the platform to at least one of the first kick plate and the second kick plate, which contributes to further improving workability.

This disclosure makes it possible to avoid interference of the bolts with the grating and to efficiently connect the kick plate.

1A is a side view showing an example wind power generator including a transition piece to which a kick plate structure according to an embodiment is applied, and FIG. 1B is a perspective view showing the transition piece of FIG. FIG. 2 is a perspective view illustrating an example of an internal structure of a transition piece according to an embodiment. FIG. 2 is a perspective view illustrating an example of a platform according to an embodiment. FIG. 4 is a perspective view showing a first kick plate, a second kick plate, and a beam of the platform of FIG. 3 . FIG. 5 is an enlarged perspective view of the first kick plate, the second kick plate, and the beam of FIG. 4 . 5A is a perspective view showing a splice plate that straddles the first kick plate in FIG. 4. FIG. 5B is a perspective view showing a state where the splice plate is removed from the state shown in FIG. 11 is a cross-sectional view taken along a plane extending in the circumferential direction of the platform, showing the insertion hole of the splice plate, the long hole of the first kick plate, and the flat head bolt. FIG. FIG. 2 is a perspective view showing a gap formed between a platform and a grating. 9A is a partial cross-sectional perspective view showing a kick plate extending upward in the gap of FIG. 8. FIG. 9B is a vertical cross-sectional view of the kick plate, grating, and transition piece of FIG. 9A.

Below, an embodiment of the kick plate structure according to the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to the following examples, but is intended to include all modifications set forth in the claims and within the scope equivalent to the claims. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicate descriptions are omitted as appropriate. In addition, the drawings may be drawn in an exaggerated or simplified form in some parts to facilitate understanding, and the dimensional ratios, etc. are not limited to those shown in the drawings.

Figure 1(a) is a side view showing a wind power generator 1 as an example to which the kick plate structure according to this embodiment is applied. Figure 1(b) is a perspective view showing a transition piece 3 of the wind power generator 1. The wind power generator 1 is installed, for example, on the seabed B, and performs offshore wind power generation. However, the wind power generator 1 is not limited to being installed in the ocean, and may be installed in water other than the ocean, such as a lake or a river.

The wind turbine 1 comprises a foundation 2, a transition piece 3 installed on the foundation 2, a tower 4 fixed to the transition piece 3, a nacelle 5 attached to the top of the tower 4, and blades 6 attached to the nacelle 5. The tower 4 is made of, for example, concrete or steel. The nacelle 5 houses a generator, a speed increaser, and the like, and for example, the rotor shaft protrudes from the speed increaser to the outside of the nacelle 5.

The blades 6 are fixed to the rotor shaft of the nacelle 5. The wind power generator 1 has, for example, three blades 6. When the blades 6 rotate in response to the wind, the rotation is increased to a constant rotation speed by an amplifier inside the nacelle 5. The rotation increased to a constant rotation speed is converted into electricity by a generator inside the nacelle 5. For example, the nacelle 5 is equipped with a wind vane and anemometer, and efficient power generation is achieved by controlling the orientation of the rotor and the angle of the blades 6 in response to the wind speed and direction.

The wind power generator 1 has, for example, a monopile foundation type, and a transition piece 3 is provided above the monopile foundation 2. The wind power generator 1 has the monopile foundation 2 cast into the water W, and the transition piece 3 extending upward from the foundation 2 and connected to the lower end of the tower 4. Note that instead of the monopile foundation type, the foundation 2 may have a tripile offshore wind foundation or a jacket-type offshore wind foundation, and the type of the foundation 2 is not particularly limited.

For example, the cross-sectional shape of the foundation 2 when cut on a horizontal plane is circular. As one example, the foundation 2 is cylindrical. The diameter of the foundation 2 is, for example, 4 m or more (for example, 6 m). The foundation 2 has, for example, a cylindrical lower part 2c that is driven into the water W, and an upper part 2d whose diameter gradually decreases from the upper end of the lower part 2c toward the top. A transition piece 3 is installed on the upper part 2d.

The transition piece 3 is provided to ensure the verticality of the wind turbine generator 1. The transition piece 3 has a cylindrical portion 3b extending along the vertical direction D1, and an external platform 10 located at the upper end of the cylindrical portion 3b. The cylindrical portion 3b has, for example, an upper portion 3d on which the external platform 10 is placed, and a lower portion 3f whose diameter gradually increases from the lower end of the upper portion 3d downward. The external platform 10 is installed on the cylindrical portion 3b so as to protrude horizontally from the upper end of the cylindrical portion 3b.

The lower part 3f of the transition piece 3 is the part through which the upper part 2d of the foundation 2 passes. For example, the transition piece 3 is joined (grout-joined) to the foundation 2 by filling the gap between the lower part 3f and the upper part 2d of the foundation 2. Note that the means for joining the transition piece to the foundation is not limited to the above-mentioned grout joint. The means for joining the transition piece to the foundation is not particularly limited and may be, for example, a bolt joint. Also, the transition piece may be joined to the foundation in advance (for example, before being driven into the seabed B).

For example, the transition piece 3 includes a ladder 3h for workers to get on and off the cylindrical portion 3b, and a rest platform 3j for workers to rest on. The ladder 3h extends, for example, from the lower portion 3f of the cylindrical portion 3b to the upper end of the cylindrical portion 3b. The transition piece 3 includes, for example, a plurality of rest platforms 3j, each of which is provided at a respective one of a plurality of intermediate portions of the ladder 3h.

The transition piece 3 has, for example, an electric wire pipe 3k and a grout pipe 3m. The electric wire pipe 3k accommodates an electric wire for ICCP (Impressed Current Cathodic Protection). The transition piece 3 has, for example, an electrode 3r arranged to protrude from the cylindrical portion 3b.

The electrode 3r is an anode (external anode of the ICCP system) placed underwater W. Electric current flows through the electrode 3r to suppress electrolytic corrosion caused by potential differences in each part of the transition piece 3. The grout pipe 3m is a pipe through which grout that fixes the transition piece 3 to the foundation 2 passes.

The transition piece 3 has a docking facility 3g in the cylindrical portion 3b. Ships carrying workers who climb onto the transition piece 3 and work on the transition piece 3 arrive at the docking facility 3g. The docking facility 3g includes, for example, two poles 3p extending along the vertical direction D1 and multiple connecting members 3q that connect the poles 3p to the cylindrical portion 3b.

The bow of the ship carrying workers fits between the two poles 3p. For example, the distance between the two poles 3p is set wide enough to allow workers to access the ship. A ladder 3h is provided between the two poles 3p. Therefore, workers who disembark from the ship can use the ladder 3h to climb up to the external platform 10 of the transition piece 3.

For example, a rest platform 3j is provided above the pole 3p. For example, multiple joint members 3q of the dock facility 3g are arranged in a line along the pole 3p. The joint members 3q are, for example, columnar and protrude from the cylindrical portion 3b, and connect each pole 3p to the cylindrical portion 3b. The pole 3p and the multiple joint members 3q are, for example, integrated.

Figure 2 is an exploded perspective view showing the internal structure of the transition piece 3. As shown in Figure 2, the transition piece 3 includes a platform 3c having a portion extending horizontally. The platform 3c includes the external platform 10 described above, a cable termination platform 20 to which multiple cables are bundled, an airtight platform 30 that blocks air from flowing vertically upward, and a lower platform 40 located above the joint 40A to which the foundation 2 is joined.

The transition piece 3 has a tubular protrusion 3y that protrudes upward from the external platform 10. A flange portion 3z of the transition piece 3 is provided at the upper end of the protrusion 3y. In this embodiment, the platform 3c includes an internal platform 50 that is located below the external platform 10 and the protrusion 3y and above the cable termination platform 20.

For example, the internal platform 50 is provided with a ladder 3x. By using the ladder 3x, it is possible to descend from the internal platform 50 to the cable termination platform 20, the airtight platform 30, and the lower platform 40.

The cable termination platform 20 is provided below the internal platform 50 and above the airtight platform 30. The cable termination platform 20 is a platform where the cable from the underwater W is connected to the cable of the tower 4.

The airtight platform 30 is provided below the cable termination platform 20 and above the lower platform 40. The airtight platform 30 is a platform that blocks air flow between the upper and lower parts of the transition piece 3. The airtight platform 30 has the function of blocking air from seawater.

The airtight platform 30 is made of, for example, carbon steel and is painted to prevent rust. The airtight platform 30 blocks air from the seawater, making it possible to create an environment in the internal space of the transition piece 3 above the airtight platform 30 that is less susceptible to corrosion (less susceptible to rust, etc.).

The lower platform 40 is, for example, a platform on which work to install the transition piece 3 on the foundation 2 is carried out. As an example, on the lower platform 40, grout is filled between the upper part 2d of the foundation 2 and the lower part 3f of the transition piece 3 (joint 40A), and the grout hardens to grout-join the transition piece 3 to the foundation 2. For example, the part of the transition piece 3 below the lower platform 40 corresponds to joint 40A where it is joined to the foundation 2.

Figure 3 is a perspective view showing the internal platform 50. Figure 4 is a perspective view showing the structure of the beams 51 of the internal platform 50. As shown in Figures 3 and 4, the internal platform 50 includes a kick plate structure 100. The kick plate structure 100 includes a plurality of beams 51, a plurality of kick plates 55 that form the outer shell of the internal platform 50, and a plurality of gratings 59 that are placed on the beams 51.

The beams 51 are arranged inside the kick plates 55 that form a ring. The beams 51 include a plurality of first beams 51A extending in a first direction A1 that intersects the vertical direction D1, and a plurality of second beams 51B extending in a second direction A2 that intersects both the vertical direction D1 and the first direction A1. The first direction A1 and the second direction A2 are, for example, in-plane directions of a virtual plane S that is defined by the kick plates 55. The first direction A1 and the second direction A2 are, for example, perpendicular to each other.

For example, one end and the other end of the first beam 51A are welded and fixed to the kick plate 55. The internal platform 50 has, for example, a pair of first beams 51A aligned along the second direction A2. The internal platform 50 also has a first region R1 located between the pair of first beams 51A, a second region R2 located on one side of the internal platform 50 in the second direction A2 as viewed from the first region R1, and a third region R3 located on the other side of the internal platform 50 in the second direction A2 as viewed from the first region R1.

That is, the internal platform 50 has three divided regions: a first region R1, a second region R2, and a third region R3. A second beam 51B is disposed in each of the first region R1, the second region R2, and the third region R3. In the first region R1, for example, multiple (six, as an example) second beams 51B connect a pair of first beams 51A to each other. In the first region R1, each second beam 51B is fixed to the first beam 51A.

The beams 51 include, for example, a third beam 51C extending in the first direction A1 in each of the second region R2 and the third region R3. For example, the second region R2 is provided with a plurality of second beams 51B and a third beam 51C (for example, two beams). The third beam 51C extends in the first direction A1 between the two second beams 51B.

For example, the second region R2 and the third region R3 are arranged symmetrically with respect to a reference line L that passes through the center O of the internal platform 50 and extends in the first direction A1. That is, the third region R3 is provided with a plurality of second beams 51B and third beams 51C, similar to the second region R2.

The plurality of kick plates 55 are arranged to extend in the circumferential direction D2 of the internal platform 50. The plurality of kick plates 55 includes a first kick plate 56 and a second kick plate 57. For example, the kick plate structure 100 includes a plurality of first kick plates 56 and a plurality of second kick plates 57, and the first kick plates 56 and the second kick plates 57 are arranged alternately along the circumferential direction D2.

The first kick plate 56 is provided, for example, in each of the second region R2 and the third region R3. The first kick plate 56 has a grating support portion 56b on which the grating 59 is placed. The grating support portion 56b protrudes to the inside of the internal platform 50 (for example, radially inward of the circular internal platform 50).

For example, the first kick plate 56 has multiple (three, for example) grating support portions 56b, which are arranged along the circumferential direction D2. The beam 51 is fixed to the first kick plate 56 by welding. For example, the first beam 51A and the second beam 51B are each fixed to the first kick plate 56 by welding.

Between a pair of grating support parts 56b arranged along the circumferential direction D2, a beam fixing part 56c is provided to which the beam 51 is fixed by welding. For example, the second beam 51B is fixed to the beam fixing part 56c. On the opposite side of the beam fixing part 56c of the grating support parts 56b located at both ends in the first direction A1, a beam fixing part 56d to which the first beam 51A is fixed is provided on the first kick plate 56.

The second kick plate 57 has a grating support portion 57b on which the grating 59 is placed. The grating support portion 57b protrudes inward from the internal platform 50, similar to the grating support portion 56b. For example, the second kick plate 57 has multiple grating support portions 57b, which are aligned along the circumferential direction D2. For example, the beam 51 is not fixed to the second kick plate 57.

Each of the multiple gratings 59 is placed on a multiple area T defined by the multiple beams 51. The multiple gratings 59 include a first grating 59A having a rectangular shape and a second grating 59B having a non-rectangular shape. The first grating 59A is positioned on the radial center side of the internal platform 50 when viewed from the second grating 59B.

The second grating 59B is positioned radially outward of the internal platform 50 as viewed from the first grating 59A. The second grating 59B has a curved surface 59b that extends along the kick plate 55, and is placed on the beam 51 so that the curved surface 59b faces radially outward (toward the kick plate 55).

Figure 5 is an enlarged perspective view of the beam 51 and the kick plate 55. As shown in Figure 5, the first beam 51A has a protruding portion 51d that protrudes in the second direction A2, and the second beam 51B extends in the second direction A2 between a pair of protruding portions 51d aligned along the second direction A2.

A flange portion 51g is formed on each of the end portions of the protrusion 51d in the second direction A2 and the end portion of the second beam 51B in the second direction A2. For example, the beam 51 does not have a portion that protrudes upward, and the flange portion 51g extends in a direction other than the upper side of the beam 51. In this embodiment, the flange portion 51g protrudes only on both sides in the first direction A1 (or horizontal direction). However, the flange portion 51g may also protrude downward.

Through holes extending in the second direction A2 are formed in the flange portion 51g of the protrusion 51d and the flange portion 51g of the second beam 51B, and the bolts 51h are inserted into the through holes. For example, a washer 51j is interposed between the bolts 51h and the flange portion 51g, and the bolts 51h are fastened to the flange portion 51g by two nuts 51k.

For example, the beam 51 (second beam 51B as an example) has a protrusion 51m that protrudes in the first direction A1 at the upper end of the beam 51. The beam 51 has, for example, a pair of protrusions 51m aligned along the first direction A1, and the pair of protrusions 51m protrude in opposite directions from the beam 51. The grating 59 is placed on the protrusions 51m, so that the grating 59 can be stably placed on the beam 51.

For example, a splice plate 58 is fixed to each of both ends of the second kick plate 57 in the circumferential direction D2. The splice plate 58 is fixed to the second kick plate 57 by, for example, welding. The splice plate 58 has, for example, a rectangular shape with rounded corners (one example is a square shape with rounded corners).

A portion of the splice plate 58 protrudes from the second kick plate 57, and the portion of the splice plate 58 protruding from the second kick plate 57 is joined to the first kick plate 56. The splice plate 58 is joined to the first kick plate 56 by a countersunk bolt 61 and a nut 62.

Figure 6(a) is an enlarged perspective view of the splice plate 58 from the inside of the internal platform 50. Figure 6(b) is a perspective view showing the splice plate 58 removed from Figure 6(a). Figure 7 is a cross-sectional view showing the splice plate 58, the first kick plate 56, the countersunk bolt 61, and the nut 62.

As shown in Figures 5, 6(a), 6(b), and 7, the attachment plate 58 and the first kick plate 56 are arranged to be aligned along the radial direction D3 of the internal platform 50. The attachment plate 58 has an insertion hole 58b through which the flat head bolt 61 is inserted. The attachment plate 58 has multiple (for example, two) insertion holes 58b aligned along the edge 58f of the attachment plate 58 facing the opposite side from the second kick plate 57.

The flat head bolt 61 has a head 61b and a threaded portion 61c, and the head 61b has a tapered surface 61d that is inclined so that the diameter of the flat head bolt 61 decreases as it approaches the threaded portion 61c. For example, the head 61b is formed with a hexagonal hole 61f into which a hexagonal wrench is inserted to rotate the flat head bolt 61.

The through hole 58b is defined by an inclined surface 58d that is inclined so that the diameter decreases as it moves away from the main surface 58c of the splice plate 58 facing the inside of the internal platform 50. The inclined surface 58d is shaped to imitate the tapered surface 61d of the countersunk bolt 61. When the countersunk bolt 61 is inserted into the through hole 58b, the tapered surface 61d comes into contact with the inclined surface 58d, and the countersunk bolt 61 does not protrude from the main surface 58c. In other words, when the countersunk bolt 61 is passed through the through hole 58b, the head 61b of the countersunk bolt 61 is flush with the main surface 58c of the splice plate 58 or enters the through hole 58b.

The first kick plate 56 has an elongated hole 56f through which the countersunk bolt 61 is passed. For example, the elongated hole 56f has an elliptical shape with a major axis extending in the longitudinal direction of the first kick plate 56 (as an example, the circumferential direction D2). The length of the minor axis of the elongated hole 56f is longer than the outer diameter of the threaded portion 61c of the countersunk bolt 61.

The first kick plate 56 has a long hole 56f extending in the circumferential direction D2, so that the countersunk bolt 61 can be efficiently inserted into the long hole 56f even if there is a manufacturing error in the circumferential direction D2 of the first kick plate 56 or the second kick plate 57. The first kick plate 56 has, for example, multiple (for example, two) long holes 56f aligned along the width direction of the first kick plate 56 (for example, the vertical direction D1).

The splice plate 58 and the first kick plate 56 are lined up in this order from the inside to the outside of the internal platform 50, and a flat head bolt 61 is inserted through the insertion hole 58b of the splice plate 58 and the long hole 56f of the first kick plate 56. The inserted flat head bolt 61 protrudes on the side opposite the splice plate 58, and, for example, two nuts 62 are fastened to the part of the flat head bolt 61 protruding from the first kick plate 56. This joins the second kick plate 57 to the first kick plate 56 via the splice plate 58.

As shown in Figures 2 and 8, the transition piece 3 is equipped with a grating 69 arranged on the external platform 10. The grating 69 is arranged on the outside of the protruding portion 3y of the transition piece 3, and a gap E is formed between the protruding portion 3y and the grating 69.

The width of the gap E may be required to be a certain value (20 mm, for example) or less in order to prevent objects from falling. However, it may be difficult to make the width of the gap E less than a certain value. Therefore, in this embodiment, as shown in Figures 9(a) and 9(b), the external platform 10 is provided with a kick plate structure 110. In the kick plate structure 110, a kick plate 55 extends upward from the grating 69 in the gap E.

For example, the first kick plate 56 and the second kick plate 57 extend upward from the grating 69, and the first kick plate 56 and the second kick plate 57 are joined to each other via the splice plate 58. For example, the splice plate 58 and the first kick plate 56 are lined up in this order from the outside to the inside of the transition piece 3. As described above, a countersunk bolt 61 is inserted through the insertion hole 58b of the splice plate 58 and the long hole 56f of the first kick plate 56.

Next, the effects of the kick plate structure 100 according to this embodiment will be described. As shown in FIG. 5, FIG. 6(a), FIG. 6(b) and FIG. 7, the kick plate structure 100 includes a first kick plate 56 and a second kick plate 57, and the first kick plate 56 and the second kick plate 57 are arranged side by side to form the internal platform 50. The kick plate structure 100 includes a splice plate 58 fixed to the second kick plate 57, and the splice plate 58 is arranged to straddle the first kick plate 56. The splice plate 58 is arranged side by side along the radial direction D3 of the first kick plate 56 and the internal platform 50, and has an insertion hole 58b through which the countersunk bolt 61 is inserted. Therefore, the countersunk bolt 61 is inserted into the splice plate 58, so that the head of the bolt does not protrude inward.

Therefore, even if the grating 59 is placed inside the internal platform 50, the countersunk bolts 61 do not interfere with the grating 59, so interference of the bolts with the grating 59 can be avoided. In addition, the first kick plate 56 has a long hole 56f through which the countersunk bolt 61 is inserted and which extends in the circumferential direction D2. Therefore, even if there is a manufacturing error in the first kick plate 56, the countersunk bolt 61 can be easily passed through the long hole 56f. As a result, the work of joining the kick plate 55 can be performed efficiently.

9(a) and 9(b), the kick plate structure 110 according to this embodiment further includes a grating 69 provided on the outside of the transition piece 3, and the first kick plate 56 and the second kick plate 57 may extend upward from the grating 69 in the gap E formed between the grating 69 and the transition piece 3. In this case, the grating 69 is provided on the outside of the transition piece 3, and the first kick plate 56 and the second kick plate 57 extend upward from the grating 69 in the gap E between the transition piece 3 and the grating 69. If the first kick plate 56 and the second kick plate 57 are not provided, there is a concern that problems such as objects falling from the gap E between the grating 69 and the transition piece 3 may occur. On the other hand, if the first kick plate 56 and the second kick plate 57 extend upward from the grating 69 in the gap E, problems such as objects falling from the gap E can be avoided.

In this embodiment, as shown in FIG. 5, the first kick plate 56 and the second kick plate 57 have grating support portions 56b, 57b on which the grating 59 is placed. Therefore, by providing the first kick plate 56 and the second kick plate 57 with the grating support portions 56b, 57b, the structure for supporting the grating 59 can be simplified. Therefore, the work of placing the grating 59 can be performed efficiently, which contributes to further improving workability.

In this embodiment, the kick plate structure 100 includes a plurality of beams 51 that constitute the internal platform 50, and the first kick plate 56 is fixed to the beams 51. Therefore, by fixing the beams 51 of the internal platform 50 to the first kick plate 56, the structure of the internal platform 50 can be simplified. This contributes to further improving workability.

The above describes an embodiment of the kick plate structure according to the present disclosure. However, the kick plate structure according to the present disclosure is not limited to the above-described embodiment, and may be modified as appropriate within the scope of the gist of the claims. In other words, the shape, size, number, material, and arrangement of each part of the kick plate structure are not limited to the above-described embodiment, and may be modified as appropriate.

For example, in the above embodiment, as shown in Figures 9(a) and 9(b), an example was described in which the first kick plate 56 and the second kick plate 57 extend upward from the grating 69 in the gap E. However, instead of the first kick plate 56 and the second kick plate 57, one kick plate 55 may extend upward from the grating 69.

That is, the kick plate structure according to the present disclosure is
A kick plate structure provided on a platform of a transition piece,
A kick plate extending circumferentially along the platform;
A grating provided on the outside of the transition piece,
The kick plate extends upward from the grating in a gap formed between the grating and the transition piece.
In this case, similarly to the above-described embodiment, problems such as objects falling through the gap E can be avoided.

In the above embodiment, an example was described in which the first kick plate 56 has a grating support portion 56b, and the second kick plate 57 has a grating support portion 57b. However, only one of the first kick plate 56 and the second kick plate 57 may have a grating support portion, and it is also possible to omit the grating support portion.

In the above embodiment, an example has been described in which the first kick plate 56 is fixed to the beam 51. However, both the first kick plate 56 and the second kick plate 57, or only the second kick plate 57, may be fixed to the beam 51. Furthermore, both the first kick plate 56 and the second kick plate 57 may be fixed to the beam 51 via separate members. In this way, there is no particular limitation on the manner in which the kick plate 55 is fixed to the beam 51.

In the above embodiment, a kick plate structure 100 provided on the inner platform 50 and a kick plate structure 110 provided on the outer platform 10 have been described. However, the kick plate structure according to the present disclosure may be provided on another platform 3c (e.g., the cable termination platform 20, the airtight platform 30, or the lower platform 40) in the transition piece 3.

In the above embodiment, a transition piece 3 having a docking facility 3g, a ladder 3h, an electric wire pipe 3k, and a grout pipe 3m has been described. However, the components of the transition piece are not limited to the above example of the transition piece 3 and can be modified as appropriate. The structure of the platform 3c of the transition piece 3 can also be modified as appropriate.

In the above embodiment, the transition piece 3 of the wind turbine 1 is described, which includes a foundation 2, a transition piece 3, a tower 4, a nacelle 5, and blades 6. However, the configurations of the foundation, transition piece, tower, nacelle, and blades are not limited to the above embodiment and can be modified as appropriate.

In the above embodiment, an example of a transition piece 3 of a wind power generator 1 has been described. However, the kick plate structure according to the present disclosure can also be applied to structures other than the transition piece 3 of a wind power generator 1. The kick plate structure according to the present disclosure can also be applied to other offshore structures such as oil platforms, or transition pieces other than offshore structures, for example.

1...wind turbine generator, 2...foundation, 3...transition piece, 3b...cylindrical part, 3c...platform, 3g...landing equipment, 3h...ladder, 3j...rest platform, 3k...electrical wire piping, 3m...grout piping, 3p...pole, 3q...joint member, 3r...electrode, 3x...ladder, 3y...projection, 3z...flange part, 4...tower, 5...nacelle, 6...blade, 10...external platform (platform), 20...cable termination platform, 30...airtight platform, 40...lower platform, 40A...joint, 50...internal platform (platform), 51...beam, 51A...first beam, 51B...second beam, 51C...third beam, 51d...projection, 51g...flange part, 51h...bolt, 51j...washer, 51k...nut, 5 1m...protrusion, 55...kick plate, 56...first kick plate, 56b, 57b...grating support portion, 56c, 56d...beam fixing portion, 56f...long hole, 57...second kick plate, 58...splicing plate, 58b...insertion hole, 58c...main surface, 58d...inclined surface, 58f...side, 59...grating, 59A...first grating, 59B...second grating, 59b...curved surface, 61 ...flat head bolt, 61b...head, 61c...threaded portion, 61d...tapered surface, 61f...hexagonal hole, 62...nut, 69...grating, 100, 110...kick plate structure, A1...first direction, A2...second direction, B...seabed, D1...vertical direction, D2...circumferential direction, D3...radial direction, E...gap, L...reference line, O...center, R1...first region, R2...second region, R3...third region, S...virtual surface, T...region, W...underwater.

Claims (4)

A kick plate structure provided on a platform of a transition piece,
a first kick plate and a second kick plate extending circumferentially around the platform and joined to each other;
a splice plate fixed to the second kick plate and joined to the first kick plate in a state of straddling the first kick plate;
Equipped with
the splice plate and the first kick plate are aligned along a radial direction of the platform,
The splice plate has an insertion hole through which a countersunk bolt is inserted,
The first kick plate has an elongated hole through which the countersunk bolt is inserted and which extends in the circumferential direction.
Kick plate construction. Further comprising a grating provided on the outside of the transition piece,
The first kick plate and the second kick plate extend upward from the grating in a gap formed between the grating and the transition piece.
The kick plate structure of claim 1. At least one of the first kick plate and the second kick plate has a grating support portion on which a grating is placed.
The kick plate structure according to claim 1 or 2. A plurality of beams constituting the platform are provided,
At least one of the first kick plate and the second kick plate is fixed to the beam.
The kick plate structure according to any one of claims 1 to 3.

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