JP7072963B2 - Implantation type offshore mount, offshore wind power generator and offshore wind condition observation device - Google Patents

Description

The present invention comprises a landing-type offshore mount that serves as a base for supporting a wind power generator installed at sea and a wind condition observation machine that measures wind conditions and other weather data at sea, and this landing-type offshore rack. The present invention relates to an offshore wind power generator equipped with a wind power generator on a table and an offshore wind condition observation device equipped with a wind condition observer.

With the depletion of petroleum resources in recent years, renewable energy represented by solar energy is drawing attention. However, since solar power generation fluctuates greatly depending on the weather and cannot generate power at night, wind power generation is attracting attention as an alternative renewable energy. Since problems such as low frequency noise have been pointed out near private houses in wind power generation, attention is being paid to installing wind power generation equipment offshore to avoid this. To install an offshore wind power generator, a platform for installing the generator at sea is required. In addition, when installing an offshore wind power generator, it is necessary to observe wind conditions such as wind direction, air volume, and wind speed in advance at sea, which is a candidate for installation, in order to select the installation environment and estimate the power generation capacity.

However, since the offshore pedestal installed on the ocean is affected by typhoons, strong winds, and waves, it is not easy to withstand these and stably install it. In particular, construction is complicated and costly to firmly fix to the seabed. On the other hand, if it is firmly fixed to the seabed, it will receive a strong resistance force, so even higher rigidity is required.

Japanese Unexamined Patent Publication No. 2017-161392 Japanese Patent No. 3951631

The present invention has been made in view of the above problems, and one of the purposes thereof is a landing type that can be installed inexpensively at sea while realizing stable power generation and wind condition measurement by adopting a landing type. The purpose is to provide an offshore mount, an offshore wind condition observation device, and an offshore wind power generator.

Means for Solving Problems and Effects of Invention

The landing-type offshore pedestal according to the first embodiment of the present invention is a gantry for installing a wind power generator for wind power generation or a wind condition observing machine for measuring wind condition data for wind power generation at sea. The lower end is placed on the seabed, and the upper end is extended in the vertical direction so as to protrude to the ocean. It has a base part to which the lower end part of the support part is connected. The strut portion is provided with a hollow floating body portion, and the lower end portion is provided with a weight portion for sinking the strut portion, and the buoyant center of buoyancy acting on the strut portion is arranged above the center of gravity of the weight portion. Further, the lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing.

According to the above configuration, the lower end of the support column held in a vertical position by the floating body portion and the weight portion is connected to the base portion installed on the seabed via a connecting structure that allows swinging, so that it is a landing type. While realizing stable power generation and wind condition measurement, it realizes excellent resistance to typhoons, strong winds, and waves, and can be installed stably for a long period of time.

In the landing type offshore pedestal according to the first embodiment of the present invention, the connecting structure is formed from a socket recess having a curved inner surface with a lower opening formed on the lower end surface of the support column, and from the upper surface of the base portion. It is provided with a round head convex portion that protrudes and has a spherical tip portion, and the round head convex portion guided to the socket recess is brought into surface contact with the inner surface of the socket recess so that the support portion is flat with respect to the base portion. It allows swinging in the direction of 360 degrees.

According to the above configuration, the round head convex portion protruding from the upper surface of the base portion is guided to the socket concave portion formed on the lower end surface of the support portion, and the tip surface of the round head convex portion faces the inner peripheral surface of the socket recess. Since the connecting structure is made to be in contact with each other, the strut portion can be stably supported with respect to the base portion while allowing the swing in the direction of 360 degrees in a plan view. In particular, in this connecting structure, the round head convex portion protruding from the upper surface of the base portion is guided to the socket concave portion of the lower opening provided on the lower end surface of the support portion, so that the contact portion between the socket concave portion and the round head convex portion can be used. It is possible to prevent mud and foreign matter from accumulating in seawater and maintain a good contact state between the socket recess and the round head protrusion. Therefore, the strut portion can be stably swung with respect to the base portion for a long period of time.

In the landing type offshore pedestal according to the first embodiment of the present invention, the connecting structure is filled with a lubricant having a specific gravity smaller than that of seawater inside the socket recess. Further, an inflow groove for allowing the lubricant to flow is provided in the contact region between the socket recess and the round head convex portion. The inflow groove is provided with a plurality of radial grooves extending radially from the center of the socket recess and a plurality of concentric ring-shaped grooves in a bottom view, and the radial grooves and the ring-shaped grooves intersect with each other and are adjacent to each other. A sub-radial groove connecting a plurality of ring-shaped grooves is provided between the radial grooves.

According to the above configuration, the lubricant filled inside the socket recess of the lower opening provided on the lower end surface of the support column reduces the contact resistance between the socket recess and the round head convex portion with the lubricant, and the support column is formed. Can swing stably with respect to the base. In particular, in the sea, since the inside of the socket recess of the lower opening is filled with a lubricant having a specific density smaller than that of seawater, this lubricant does not flow out from the socket recess and remains inside the socket recess for a long period of time. The contact resistance between the socket recess and the round head protrusion can be reduced. Further, even if the lubricant decreases over time, it can be easily replenished and a good contact state can be maintained . Further , according to the above configuration, the lubricant is allowed to flow into the inflow groove provided in the contact area between the socket recess and the round head convex portion, and the contact resistance at the contact surface between the socket concave portion and the round head convex portion is reduced. Can slide smoothly.

The landing-type offshore pedestal according to the second embodiment of the present invention is a gantry for installing a wind power generator for wind power generation or a wind condition observing machine for measuring wind condition data for wind power generation at sea. The lower end is placed on the seabed, and the upper end is extended in the vertical direction so as to protrude to the ocean. It has a base part to which the lower end part of the support part is connected. The strut portion is provided with a hollow floating body portion, and the lower end portion is provided with a weight portion for sinking the strut portion, and the buoyant center of buoyancy acting on the strut portion is arranged above the center of gravity of the weight portion. The strut portion is held in a vertical position, and the lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing. The connecting structure includes a socket recess having a curved inner surface with a lower opening formed on the lower end surface of the strut portion, and a round head convex portion having a spherical tip portion protruding from the upper surface of the base portion. In the round head convex portion, the radius of curvature (R2) of the upper end surface is made equal to or smaller than the radius of curvature (R1) of the inner surface of the socket recess, and the upper end surface facing the socket recess is brought into contact with the inner surface of the socket recess. At the same time, the radius of curvature (R3) of the outer peripheral portion is made smaller than the radius of curvature (R2) of the upper end surface, and the round head convex portion has the area of the upper end surface which is the contact surface with the socket recess of the support portion. Make the area of the cross section equal to or larger than the area, and bring the round head convex portion guided to the socket recess into surface contact with the inner surface of the socket recess, and bring the strut portion in the direction of 360 degrees in a plan view with respect to the base portion. Allows swinging to.

In the landing type offshore pedestal according to another embodiment of the present invention, the connecting structure further includes a plurality of connecting cords for connecting the lower end portion of the support column portion and the base portion. According to the above configuration, while allowing the strut portion to swing with respect to the base portion, it is possible to prevent the strut portion from rotating in a horizontal plane, and the socket recess of the strut portion is formed from the round head convex portion of the base portion. It can be prevented from falling off.

The landing-type offshore pedestal according to the third embodiment of the present invention is a gantry for installing a wind power generator for wind power generation or a wind condition observing machine for measuring wind condition data for wind power generation at sea. The lower end is placed on the seabed, and the upper end is extended in the vertical direction so as to protrude to the ocean. It has a base part to which the lower end part of the support part is connected. The strut portion is provided with a hollow floating body portion, and the lower end portion is provided with a weight portion for sinking the strut portion, and the buoyant center of buoyancy acting on the strut portion is arranged above the center of gravity of the weight portion. Further, the lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing. The connecting structure is formed with a columnar or conical connecting convex portion protruding downward from the lower end of the strut portion, an insertion portion of an upper opening into which the connecting convex portion is inserted, and an insertion portion connected to the insertion portion. It is provided with a rubber-like elastic body interposed between the protrusions.

According to the above configuration, by inserting the connecting convex portion provided on the strut portion into the insertion portion provided on the base portion, the strut portion and the base portion are connected in a fixed position, and a rubber-like shape is formed between the strut portion and the insertion portion. By interposing an elastic body, the rubber-like elastic body absorbs the positional deviation between the connecting convex portion and the insertion portion, and the swing of the strut portion can be tolerated.

In the landing type offshore pedestal according to the third embodiment of the present invention, the rubber-like elastic body has a cylindrical shape through which a connecting convex portion can be inserted, and a flange portion is integrally provided at one end thereof. The portion is interposed between the lower surface of the support column portion and the upper surface of the base portion.

According to the above configuration, the rubber-like elastic body is formed into a tubular shape through which the connecting convex portion can be inserted, and the flange portion provided on the upper end edge is provided as a strut portion while the tubular portion is interposed between the connecting convex portion and the insertion portion. By interposing between the lower surface of the base portion and the upper surface of the base portion, the strut portion can be swung more stably with respect to the base portion.

In the landing type offshore pedestal according to another embodiment of the present invention, the strut portion has a connecting convex portion at the center of the lower end surface, and the base portion has an insertion portion at the center portion of the upper surface. A plurality of elastic bodies are interposed between the outer peripheral portion of the lower end surface and the upper surface of the base portion.

According to the above configuration, the lower end surface of the strut portion is arranged while the connecting convex portion provided in the central portion of the lower end surface of the strut portion is arranged in the insertion portion provided in the central portion of the upper surface of the base portion via the rubber-like elastic body. By interposing a plurality of elastic bodies between the outer peripheral portion of the base portion and the upper surface portion of the base portion, it is possible to stably allow swinging with respect to the base portion even in a strut portion having a large bottom area.

The landing-type offshore pedestal according to the fourth embodiment of the present invention is a gantry for installing a wind power generator for wind power generation or a wind condition observing machine for measuring wind condition data for wind power generation at sea. The lower end is placed on the seabed, and the upper end is extended in the vertical direction so as to protrude to the ocean. It has a base part to which the lower end part of the support part is connected. The strut portion is provided with a hollow floating body portion, and the lower end portion is provided with a weight portion for sinking the strut portion, and the buoyant center of buoyancy acting on the strut portion is arranged above the center of gravity of the weight portion. Further, the lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing. The connecting structure has a concave portion of a lower opening formed on the lower end surface of the column portion, a convex portion protruding from the upper surface of the base portion and guided to the concave portion, and a swing mechanism arranged between the concave portion and the convex portion. I have. The swing mechanism includes a cup portion fitted in a concave portion formed on the lower end surface of the strut portion, a cap portion covering a convex portion protruding from the upper surface of the base portion, and an inner surface of the cup portion and an outer surface of the cap portion. It is equipped with a plurality of elastic bodies arranged between the two, and the cup portion and the cap portion are relatively moved via the plurality of elastic bodies, and the support portion is 360 degrees in a plan view with respect to the base portion. It allows swinging in the direction.

According to the above configuration, the concave portion of the lower opening provided on the lower end surface of the column portion and the convex portion protruding from the upper surface of the base portion are connected by a swing mechanism, and this swing mechanism fits into the concave portion. Since it is provided with a cup portion to be formed, a cap portion covering the convex portion, and a plurality of elastic bodies arranged between them, a strut portion connected to the base portion via a plurality of elastic bodies. Can tolerate rocking. In particular, in this connecting structure, the cup portion fitted to the concave portion of the lower opening provided on the lower end surface of the strut portion is guided to the cup portion covering the convex portion protruding from the upper surface of the base portion. Since multiple elastic bodies are placed between the cap parts, it effectively prevents mud and foreign matter in seawater from entering between the cup part and the cap part where the elastic bodies are placed, and supports the columns for a long period of time. The part can be swung stably with respect to the base part.

In the landing type offshore pedestal according to another embodiment of the present invention, the swing mechanism provides a gap between the inner surface of the cup portion and the outer surface of the cap portion, and this gap is used as an air layer.

According to the above configuration, a gap is provided between the inner surface of the cup portion and the outer surface of the cap portion, and this gap is used as an air layer to prevent the infiltration of seawater. Therefore, the gap between the cup portion and the cap portion is prevented. It is possible to prevent a plurality of elastic bodies arranged in the gap from coming into contact with seawater, and effectively prevent deterioration of the elastic body over time.

In the landing type offshore pedestal according to another embodiment of the present invention, the swing mechanism provides a gap between the inner surface of the cup portion and the outer surface of the cap portion, and the specific gravity is higher than that of seawater in this gap. Filled with a small lubricant.

According to the above configuration, the gap formed between the inner surface of the cup portion and the outer surface of the cap portion is filled with a lubricant having a specific gravity smaller than that of seawater. It can be protected and effectively prevented from deterioration over time. In particular, since the gap formed inside the cup portion of the lower opening and between the cap portion guided by the cup portion is filled with a lubricant having a specific gravity smaller than that of seawater, this lubricant is used as a cup. The elastic body can be protected by remaining in the gap between the cup portion and the cap portion for a long period of time without flowing out from the portion. Moreover, even if the lubricant decreases over time, it can be easily replenished.

In the landing type offshore pedestal according to another embodiment of the present invention, a plurality of elastic bodies are made of rubber or springs.

In the landing type offshore pedestal according to another embodiment of the present invention, the first swing shaft and the first swing shaft whose connecting structure is a swing shaft that swings the lower end portion of the support column in the first direction. It is provided with a second swinging shaft that is arranged so as to intersect the moving axis and serves as a swinging axis that swings the lower end of the strut portion in the second direction that intersects the first direction. It allows swinging in the direction of 360 degrees in a plan view with respect to the base portion.

According to the above configuration, since the connecting structure allows the strut portion to swing via the first swing axis and the second coaxial cable that intersect with each other, the strut portion is oriented in the direction of 360 degrees in a plan view with respect to the base portion. Can tolerate swinging to.

In the landing type offshore pedestal according to another embodiment of the present invention, the base portion has a base portion fixed to the seabed and the base portion can swing freely in a second direction via a second swing shaft. It is provided with a connected oscillating body, and the strut portion is oscillatingly connected to the oscillating body in the first direction via the first oscillating shaft, and the first oscillating shaft and the second oscillating body. The moving axes are arranged in directions orthogonal to each other.

In the landing-type offshore pedestal according to another embodiment of the present invention, a support column portion is provided with a thick cylinder portion having a portion having a larger outer diameter than the other portion, which is arranged below the sea surface. The thick cylinder part is hollow and is a part of the floating body part.

The landing-type offshore pedestal according to another embodiment of the present invention further includes a cylindrical and hollow sub-floating body portion that is detachably connected to a strut portion, and the sub-floating body portion is inserted in the center. It is placed below the sea surface along the pillars to be formed.

The offshore wind power generator according to another embodiment of the present invention is an offshore wind power generator provided with any of the above-mentioned landing-type offshore pedestals, and is installed at the landing-type offshore pedestal and the upper end of a support column. It is equipped with a wind power generator.

In the offshore wind power generator according to another embodiment of the present invention, the wind power generator includes a downwind type wind turbine.

According to the above configuration, since the wind power generator is equipped with a downwind type wind turbine, stable power generation can be performed without lowering the power generation efficiency even when the support column swings to the leeward side.

The offshore wind condition observation device according to another embodiment of the present invention is an offshore wind condition observation device provided with any of the above-mentioned landing-type offshore pedestals, and is a landing-type offshore pedestal and the upper end of a support column. It is equipped with a wind condition observing machine installed in the above, and the support column has a platform part at the upper end, and the wind condition observing machine is provided at the platform part.

It is a schematic sectional drawing which shows the offshore wind power generator which concerns on one Embodiment of this invention. It is a schematic cross-sectional view which shows the offshore wind condition observation apparatus which concerns on one Embodiment of this invention. It is an enlarged sectional view of the floating body part of the landing type offshore pedestal of the offshore wind power generator shown in FIG. 1. It is an enlarged sectional view which shows an example of the sub floating body part. It is an exploded sectional view which shows an example of the connection structure. It is a partially enlarged sectional view of the connection structure shown in FIG. It is a partially enlarged sectional view which shows another example of a connected structure. It is a bottom view of the socket recess shown in FIG. 7. It is an enlarged sectional view which shows another example of a connected structure. It is an enlarged sectional view which shows another example of a connected structure. It is an exploded sectional view which shows the other example of the connected structure. FIG. 11 is an enlarged cross-sectional view of the connecting structure shown in FIG. It is an enlarged sectional view which shows another example of a connected structure. It is a perspective view which shows another example of the connection structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments shown below are examples for embodying the technical idea of the present invention, and the present invention is not specified as the following. Further, the present specification does not specify the members shown in the claims as the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are not intended to limit the scope of the present invention to the specific description, but are merely explanatory examples. Only. The size and positional relationship of the members shown in each drawing may be exaggerated for the sake of clarity. Further, in the following description, parts having the same name and reference numerals are shown to have the same or the same quality, and detailed description thereof will be omitted as appropriate. Further, each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are combined with one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.

The landing type offshore pedestal of the present invention is a gantry for installing a wind power generator for wind power generation or a wind condition observing machine for measuring wind condition data for wind power generation at sea. This landing type offshore pedestal is mainly used for installing a wind power generator or a wind condition observer at sea in the ocean where the water depth is 20 m to 100 m. However, the landing type offshore pedestal of the present invention is used not only on the ocean but also as a gantry for laying a wind power generator or a wind condition observer on the water surface by landing on the bottom of a lake having a predetermined water depth. You can also do it. Therefore, in the present specification, the term “offshore” is used in a broad sense including not only on the ocean but also on the lake.

(Implantation type offshore mount 9)
FIG. 1 shows an example of an offshore wind power generator 100 in which a wind power generator 30 is installed on a landing type offshore pedestal 9, and FIG. 2 shows a wind condition observation machine 35 on a landing type offshore pedestal 9. An example of the offshore wind condition observation device 200 in which the above is installed is shown. The landing type offshore pedestal 9 shown in these figures has a lower end arranged on the seabed 90 and is extended in the vertical direction so as to project the upper end to the sea, and the wind power generator 30 or the wind condition observer 35 is extended to the upper end. The support portion 1 is installed, and the base portion 2 is installed on the seabed 90 and the lower end portion of the support portion 1 is connected to the support portion 1.

(Strut part 1)
The strut portion 1 shown in FIGS. 1 and 2 is a columnar shape extended in the vertical direction, and is arranged in the sea in a vertical posture in which the lower end portion is arranged on the seabed 90 and the upper end portion protrudes above the sea surface. In order to arrange the strut portion 1 extending vertically from the seabed 90 toward the sea surface in a vertical posture, the strut portion 1 is provided with a weight portion 3 at the lower end portion to settle the strut portion 1 to lower the center of gravity G. The floating body portion 4 is provided with the inside of the upper portion hollow, and the floating center F of the floating body portion 4 is arranged at a position higher than the center of gravity G. As a result, the support column 1 arranged in the vertical direction can be held in a vertical posture.

The support column 1 has a lower end arranged on the seabed 90 and an upper end having a total length protruding to the ocean. The strut portion 1 extending from the seabed 90 onto the ocean is arranged in a vertical posture, and the lower end portion of the main body portion 1A arranged in the sea is connected to the base portion 2 installed on the seabed 90. A wind power generator 30 or a wind condition observer 35 is installed at the upper end of the protruding portion 1B protruding above the sea surface. The strut portion 1 is arranged so that the upper end thereof protrudes from the sea surface by 5 m to 10 m. Therefore, the total length of the support column 1 is set to be 5 m to 10 m longer than the water depth of the installation location. For example, in the landing type offshore pedestal 9 installed in a sea area where the water depth is 50 m, the total length of the support column 1 is 55 m to 60 m, and the upper end portion is projected 5 m to 10 m above the sea surface.

As shown in FIG. 3, the support column 1 shown in FIGS. 1 and 2 is formed of a cylindrical steel pipe 10 having a predetermined outer diameter. The strut portion 1 formed of the cylindrical steel pipe 10 is formed by connecting a plurality of steel pipes 10 to a predetermined length. The support column 1 shown in FIGS. 1 and 2 has a predetermined total length by connecting a plurality of steel pipes 10 having a length of 10 m to several tens of m. Each steel pipe 10 shown in FIG. 3 is provided with a flange portion 11 projecting outward along the edge, and by connecting the opposing flange portions 11 to each other via a connector 12, a plurality of steel pipes 10 can be connected. It is connected in a straight line to have a predetermined total length. However, the length of the steel pipe 10 to be used and the number of connected steel pipes can be changed in various ways. As described above, the structure in which the support column 1 is formed of a plurality of steel pipes 10 has a feature that it can be easily and easily manufactured while reducing the manufacturing cost by using the ready-made steel pipes.

(Floating part 4)
The strut portion 1 is provided with a floating body portion 4 having at least a part hollow in order to arrange it in a stable posture. The column portion 1 made of the cylindrical steel pipe 10 forms the floating body portion 4 by providing a hollow region in the main body portion arranged in the sea. By making the inside of the floating body portion 4 hollow, the weight with respect to the buoyancy is reduced, and the buoyancy is substantially increased.

The strut portion 1 formed of a plurality of steel pipes can form a floating body portion by using the entire inside of the steel pipe as one space, but preferably, a partition wall 13 is provided inside to form the floating body portion 4. The unit 14 is divided into a plurality of areas. The floating body portion 4 shown in FIG. 3 is provided with a plurality of partition walls 13 to partition the hollow portion 14 into a plurality of partition chambers 14A. In the support column 1 shown in FIG. 3, a sandwiching plate 13A is interposed between the steel pipes 10 connected to each other, and the sandwiching plate 13A serves as a partition wall 13. The sandwiching plate 13A arranged between the steel pipes 10 has an outer shape along the flange portion 11 provided at the end edge of the steel pipes 10, and is sandwiched between the opposing flange portions 11 in a close contact state. The inside of the adjacent steel pipes 10 is partitioned. The sandwiching plate 13A can seal each partition chamber 14A in a watertight structure by interposing a packing between the sandwiching plate 13A and the flange portion 11 of the steel pipe 10.

Further, the support column 1 shown in FIG. 3 is provided with a dividing plate 13B for dividing the internal region of the steel pipe 10 in the intermediate portion of the steel pipe 10 to form a partition wall 13. The split plate 13B shown in the figure has an outer shape that follows the inner shape of the steel pipe 10, and is fixed so that the outer peripheral surface is in close contact with the inner peripheral surface of the steel pipe 10, and the inside of the steel pipe 10 is filled with a plurality of partition chambers 14A. It is divided into.

As described above, the structure in which the hollow portion 14 formed inside the support column 1 is divided into a plurality of partition chambers 14A by the partition wall 13 is flooded by the partition wall 13 even if the inside of the floating body portion 4 is flooded. The expansion of the region can be suppressed, and by partitioning the inside of the floating body portion 4 into a plurality of parts by the partition wall 13, the position of the center of the buoyancy acting on the floating body portion 4 (hereinafter referred to as the floating center F) is stabilized, and the strut portion is formed. 1 can be held in a vertical posture.

Here, the buoyancy P acting on an object in seawater is obtained by multiplying the volume of the object immersed in seawater by the specific gravity of seawater. That is, the magnitude of the buoyancy P is proportional to the volume of the object in seawater. Therefore, the floating body portion 4 can obtain a larger buoyancy P by increasing the outer diameter of the strut portion 1. Therefore, the support column 1 is adjusted to an optimum outer diameter in consideration of the buoyancy P required for the gantry. The outer diameter of the strut portion 1 is also changed depending on the equipment installed on the strut portion 1 and the water depth in the sea area where the landing type offshore pedestal 9 is installed. For example, as shown in FIG. 1, the buoyancy of the support column 1 that supports the heavy wind power generator 30 can be increased by increasing the outer diameter. As shown in FIG. 1, in the landing type offshore pedestal 9 installed in a sea area having a water depth of 40 m to 100 m and installing a wind power generator 30 at the upper end, the outer diameter of the support column 1 is preferably 5 m to 12 m, preferably. It can be 7 to 10 m. Further, as shown in FIG. 2, in the landing type offshore pedestal 9 installed in the sea area at a water depth of 20 m to 50 m and arranging the wind condition observation aircraft 35 at the upper end, the outer diameter of the support column 1 is 1 m to 4 m. Can be.

Further, the strut portion 1 shown in FIGS. 1 and 2 is provided with a thick cylinder portion 1C having a portion arranged below the sea surface having a larger outer diameter than the other portions, and the inside of the thick cylinder portion 1C. Is hollow to form a part of the floating body portion 4. In this way, the buoyancy P acting on the floating body portion 4 can be further increased by providing the thick cylinder portion 1C having a larger outer diameter than the main body portion 1A. Further, the strut portion 1 having the thick cylinder portion 1C is provided with the thick cylinder portion 1C having a large surface area near the sea surface, so that when the strut portion 1 swings with the lower end portion as a fulcrum, the strut portion 1 is placed on the upper portion of the strut portion 1. It also has the effect of increasing the resistance of the acting water and suppressing rocking. By setting the outer diameter of such a thick cylinder portion 1C to 1.5 to 2 times the outer diameter of the main body portion 1, for example, the magnitude of the buoyancy acting on this region is 2 to 4 times larger. Can be made larger.

(Sub-floating part 40)
Further, as shown in FIG. 4, the strut portion 1 may also include a sub-floating body portion 40 that is detachably connected to the strut portion 1. The sub-floating body portion 40 shown in the figure has a cylindrical shape as a whole and a hollow shape inside so that buoyancy is generated in the sea. The sub-floating body portion 40 shown in the figure has a central hole 41 opened so that the strut portion 1 can be inserted inward, and the strut portion 1 is inserted through the center hole 41 and is moved up and down along the strut portion 1. I am making it possible to move. By fixing the sub-floating body portion 40 to the strut portion 1 so as to be arranged below the sea surface, as in the case of the thick cylinder portion 1C of FIG. 1, the buoyancy acting on the strut portion can be increased. The sub-floating body portion 40 shown in the figure can be fixed to the main body portion 1A of the strut portion 1 via the fixing member 42.

The sub-floating body portion 40 can be used, for example, according to the load of the wind power generator 30 installed on the strut portion 1, so that the load supported by the strut portion 1 can be adjusted. In other words, the magnitude of the buoyancy acting on the strut portion 1 can be adjusted by selectively using the sub-floating body portions 40 having different sizes according to the weight of the wind power generator 30 installed on the strut portion 1. .. Further, the sub-buoyancy portion 40 can be filled with ballast water 44, and the ballast water 44 can be taken in and out using a pump 43 or the like to adjust the magnitude of buoyancy. In the landing type offshore pedestal 9, for example, when the support column 1 provided with the sub-buoyancy unit 40 is installed in the sea, the sub-buoyancy unit 40 is filled with ballast water 44 and the support column installed at a fixed position. When the wind power generator 30 is installed at the upper end of the unit 1, the ballast water 44 inside the sub-floating unit 40 can be drained to generate buoyancy, and the buoyancy supporting the wind power generator 30 can be increased. .. In this way, the landing-type offshore pedestal 9 provided with the sub-floating body portion 40 that allows the ballast water 44 to be freely taken in and out can efficiently install the offshore wind power generator 100 while adjusting the buoyancy acting on the strut portion 1. can.

The above-mentioned strut portion 1 has a floating body portion 4 in order to stably hold the strut portion 1 in a vertical posture in a state where the lower end portion is submerged in the sea by its own weight and connected to the base portion 2 provided on the seabed 90. The buoyancy center F of the working buoyancy is configured to be located above the center of gravity G of the weight portion 3 provided at the lower end portion. That is, in the column portion 1 extended up and down, the buoyancy center F of the buoyancy P acting upward on the floating body portion 4 is arranged above, and the center of gravity G of gravity W acting downward on the weight portion 3 is located below. The low center of gravity keeps it in a vertical position.

(Weight part 3)
Further, the support column 1 shown in FIGS. 1 and 2 is provided with a weight portion at the lower end portion for sinking the support column 1. The weight portion 3 can arrange the center of gravity G in the strut portion 1 downward by forming the lower end portion of the strut portion 1 as a solid. The support column 1 shown in FIG. 3 is provided with a concrete caisson 16 having a larger outer diameter than the main body portion 1A of the support column 1 at the lower end portion while filling the inside of the steel pipe 10 with concrete 15 at the lower end portion. A heavy weight portion 3 is formed to realize a low center of gravity. In the concrete caisson 16 of FIG. 5, the lower end portion of the steel pipe 10 is insert-molded, and the concrete 15 filled in the lower end portion of the steel pipe 10 and the concrete caisson 16 are integrally connected.

According to this structure, the weight of the weight portion 3 formed at the lower end portion of the strut portion 1 is increased, the center of gravity G of the strut portion 1 is arranged downward, and the strut portion 1 is held in a more stable vertical posture. can. However, the weight portion 3 does not necessarily have to have an outer diameter larger than that of the main body portion 1A of the strut portion 1, and may have an outer diameter equal to that of the strut portion 1. Further, although not shown, the strut portion may form the weight portion 3 by connecting the strut portion and a weight made of another member to the lower end portion. The support column 1 can smoothly settle to the seabed using the concrete 15 filled in the lower end portion and the weight portion 3 formed by the concrete caisson 16 formed in the lower end portion as a sinker.

(Base part 2)
The base portion 2 is installed on the seabed 90, and the lower end portion of the support column portion 1 is connected to the base portion 2. The base portion 2 shown in FIG. 5 is a concrete caisson 21. The concrete caisson 21 is made of reinforced concrete having a predetermined shape as a whole, and is installed on the seabed 90 in a horizontal posture as shown in the figure. Reinforced concrete has a specific gravity of about 2.4 t / m ³ , can be manufactured easily and inexpensively, and has excellent durability, so that it is the most suitable material for a caisson to be installed on the seabed as a base portion 2.

The base portion 2 composed of the concrete caisson 21 has a block shape having a polygonal shape or a circular shape in a plan view, and the bottom surface is widened so that the base portion 2 can be stably installed on the seabed surface. In the block-shaped base portion 2, the central portion is formed thicker than the outer peripheral portion to form a pedestal portion 22 that supports the support column portion 1, and the outer peripheral portion 23 is formed wide so that the installation area with respect to the seabed 90 becomes large. are doing. The base portion 2 has, for example, an outer diameter of 20 m to 30 m. The base portion 2 in the figure is fixed to the seabed 90 via a pile member 24 penetrating the outer peripheral portion. In the base portion 2 made of the concrete caisson 21, for example, the thickness of the pedestal portion 22 is several m, and the thickness of the outer peripheral portion 23 is several tens of cm to several m. In the base portion 2 in the figure, a plurality of piles penetrating the outer peripheral portion are driven into the seabed to fix the base portion to the seabed.

As described above, the life of the landing type offshore pedestal 9 can be extended by making the base portion 2 made of concrete. For this reason, by making the strut portion 1 and the base portion 2 detachable, the durability of the concrete base portion 2 can be extended and used repeatedly, while the metal strut portion 1 and the wind power generator having a short life can be used repeatedly. By replacing only 30, the cost can be reduced while effectively using the base portion 2.

In the above-mentioned landing type offshore pedestal 9, the lower end portion of the support column 1 arranged from the seabed 90 to the sea surface is connected to the base portion 2 installed on the seabed 90 and arranged in a self-supporting posture. The support column 1 may be tilted from a vertical posture when the wind power generator 30 installed at the upper end or the upper end near the sea surface receives strong wind or waves due to a typhoon or the like. At this time, if the lower end of the strut portion 1 and the base portion 2 are firmly fixed, a large stress acts on the connecting portion with the base portion 2 due to the load received from the inclined strut portion 1, and the connecting portion is damaged. There is a risk. In order to solve such a problem, in the landing type offshore pedestal 9 of the present invention, the lower end portion of the strut portion 1 is connected to the strut portion 1 via a connecting structure 5 that allows the strut portion 1 to swing. The lower end portion is connected to the base portion 2. Hereinafter, the connecting structure 5 of the support column portion and the base portion 2 will be described in detail.

(Connected structure 5)
The connecting structure 5 shown in FIGS. 5 and 6 is formed so as to protrude from the upper surface of the base portion 2 and the socket recess 51 having a curved inner surface with a lower opening formed on the lower end surface of the support column 1. , A round head convex portion 52 having a spherical tip portion is provided. The socket recess 51 is a recess having a lower opening formed on the lower end surface of the support portion 1, and the support portion 1 shown in the figure is provided with a weight portion 3 made of a concrete caisson 16 at the lower end portion of the weight portion 3. The lower end surface is formed into a concave shape at the center to provide the socket recess 51. The inner surface of the socket recess 51 has a curved surface shape so as to make surface contact with the spherical surface formed at the tip of the round head convex portion 52 formed in the base portion 2. The central portion of the socket recess 51 is preferably a curved surface having a radius of curvature R1 slightly larger than the radius of curvature R2 of the tip surface of the round head convex portion 52, and a tapered surface or a tapered surface below the curved surface. It has a rotating paraboloid shape. As a result, the inner surface of the socket recess 51 is moved along the tip surface of the round head convex portion 52 in a surface contact state so that the support column 1 can be swung.

In the above connection structure 5, the round head convex portion 52 guided by the socket recess 51 is brought into surface contact with the inner surface of the socket recess 51, and the contact position between the inner surface of the socket recess 51 and the surface of the round head convex portion 52 is set. By changing the strut portion 1, the strut portion 1 can be freely swung with respect to the base portion 2. In particular, according to this connection structure, the strut portion 1 can be allowed to swing in the direction of 360 degrees in a plan view with respect to the base portion 2.

Further, since the connecting structure 5 guides the round head convex portion 52 protruding from the upper surface of the base portion 2 to the socket recess 51 of the lower opening provided on the lower end surface of the support column portion 1, the socket recess 51 and the round head convex portion It is possible to eliminate the accumulation of mud and foreign matter in seawater on the contact portion of the portion 52. This is because the socket recess 51 has a lower opening. Therefore, the contact portion between the socket concave portion 51 and the round head convex portion 52 can be kept in a clean state for a long period of time, and a good contact state can be maintained.

Further, in the connecting structure 5 shown in FIG. 6, the inside of the socket recess 51 is filled with a lubricant 53 having a specific gravity smaller than that of seawater. As such a lubricant 53, a liquid lubricating oil, a semi-solid grease, or the like can be used. As described above, since the lubricant 53 filled in the socket recess 51 of the lower opening has a smaller specific gravity than that of seawater, the lubricant 53 does not flow out from the socket recess 51 into seawater and is held in a state of remaining in the socket recess 51. .. Therefore, a good contact state can be maintained while reducing the frictional resistance between the socket recess 51 and the round head convex portion 52 for a long period of time. In particular, as shown in FIG. 6, by making the radius of curvature R1 of the socket recess 51 larger than the radius of curvature R2 of the round head convex portion 52, an adjacent gap 54 is formed in the vicinity of the area in contact with the surface due to the difference in radius of curvature. Since it is formed, the lubricant 53 is interposed between the contact surfaces when the contact position between the inner surface of the socket recess 51 and the outer surface of the round head convex portion 52 is moved by the lubricant flowing into the adjacent gap 54. By doing so, friction can be reduced and smooth contact can be realized. Therefore, it is possible to maintain a good contact state for a long period of time while effectively preventing deterioration of the contact portion between the socket concave portion 51 and the round head convex portion 52.

Further, as shown by the chain line in FIG. 6, the socket recess 51 may be provided with an inflow groove 55 in a contact region with the round head convex portion 52, and the lubricant 53 may flow into the inflow groove 55. Also in this structure, the lubricant 53 can be effectively flowed between the inner surface of the socket recess 51 and the outer surface of the round head convex portion 52, and smooth contact can be realized. The inflow groove may be provided on the surface of the round head convex portion.

Further, the connecting structure 5 composed of the socket recess 51 formed at the lower end of the support column 1 and the round head convex portion 52 formed at the base portion 2 can be the structure shown in FIG. 7. The connecting structure 5 shown in FIG. 7 has a structure in which the upper end surface 52a of the round head convex portion 52 and the inner surface of the socket recess 51 are brought into contact with each other over a wider area. The socket recess 51 shown in FIG. 7 has a hemispherical inner surface shape. The round head convex portion 52 has a curved surface shape along the inner surface of the socket recess 51 in the shape of the upper end surface 52a. In the round head convex portion 52, the radius of curvature R2 of the upper end surface 52a is equal to or slightly smaller than the radius of curvature R1 of the inner surface of the socket recess 51. As a result, the upper end surface 52A of the round head convex portion 52 and the inner surface of the socket recess 51 are supported in a wider area in surface contact with each other. Further, the round head convex portion 52 shown in the figure has a structure in which the upper end surface 52a facing the socket recess 51 is brought into contact with the inner surface of the socket recess 51, and the radius of curvature R3 of the outer peripheral portion 52b is set from the radius of curvature R2 of the upper end surface 52a. By making the size smaller, the inner surface of the socket recess 51 can be smoothly slid with respect to the upper end surface 52a of the round head convex portion 52.

According to the above-mentioned connection structure 5, there is a feature that the area for supporting the load of the support column 1 can be widened to prevent a large load from being locally applied to the contact portion between the round head convex portion 52 and the socket concave portion 51. In particular, in the round head convex portion 52 shown in FIG. 7, the area of the upper end surface 52a, which is the contact surface with the socket recess 51, is made substantially equal to or slightly larger than the area of the cross section of the main body portion 1A of the column portion 1. The support column 1 can be supported more stably. However, the area of the upper end surface 52a of the round head convex portion 52 in contact with the socket recess 51 may be smaller than the area of the cross section of the main body portion 1A of the column portion 1.

Further, also in the connecting structure 5 shown in FIG. 7, the inside of the socket recess 51 is filled with the lubricant 53 having a specific gravity smaller than that of seawater. In the connecting structure 5 in the figure, since the contact area between the round head convex portion 52 and the socket recess 51 is widened, a circle is used to supply the lubricant 53 filled inside the socket recess 51 to the entire contact surface. An inflow groove 55 is provided in the contact area between the head protrusion 52 and the socket recess 51. The support column 1 shown in FIG. 8 forms a plurality of inflow grooves 55 that intersect each other on the inner surface of the socket recess 51. The inflow groove 55 in the figure is provided with a plurality of radial grooves 55a extending radially from the center of the socket recess 51 and a plurality of concentric ring-shaped grooves 55b in the bottom view, and the radial groove 55a and the ring-shaped groove 55b. And cross each other. Further, a sub-radial groove 55c for connecting a plurality of ring-shaped grooves is provided between the adjacent radial grooves 55a. By forming the inflow groove 55 so that the plurality of grooves intersect with each other, the lubricant 53 can be efficiently supplied to the entire contact surface. The inflow groove 55 may have a groove width of several mm to several cm and a depth of several mm to several cm. As described above, the structure in which the inflow groove 55 is provided in the contact region between the round head convex portion 52 and the socket concave portion 51 effectively supplies the lubricant 53 to the entire contact surface between the socket concave portion 51 and the round head convex portion 52. Therefore, smooth contact can be achieved.

The inflow groove 55 having the above shape lubricates the entire contact surface between the socket recess 51 and the round head convex portion 52 by flowing the lubricant 53 flowing into the radial groove 55a and the sub-radial groove 55c into the ring-shaped groove 55b. It has the characteristic that the agent 53 can be effectively supplied. However, the inflow groove is not limited to the above shape, for example, a shape that intersects in a matrix shape or a honeycomb shape, a shape that extends radially from the center of the contact surface, or a spider web from the center of the contact surface. It can be a shape that spreads out like a shape. Further, although the inflow groove 55 in the figure is provided on the inner surface of the socket recess 51, the inflow groove can be provided on the surface of the round head convex portion 52, or both the inner surface of the socket recess 51 and the surface of the round head convex portion 52. It can also be installed in.

Further, in the connecting mechanism 5 shown in FIG. 7, the lower end portion of the support column portion 1 and the base portion 2 are connected via a plurality of connecting cords 80. The strut portion 1 is connected to the base portion 2 via, for example, a plurality of connecting cords 80 extending radially from the lower end portion. The support column 1 is provided with a plurality of connecting portions 81 protruding from the outer peripheral surface of the lower end portion at equal intervals along the outer peripheral circle. The base portion 2 is provided with a plurality of fixing portions 82 protruding from the pedestal portion 22 at equal intervals facing the plurality of connecting portions 81 provided at the lower end portions of the strut portion 1. The plurality of cords 5 radially arranged from the strut portion 1 are 3 to 16, preferably 4 to 8, so that the strut portion 1 can be reliably held at a fixed position of the base portion 2. The connection mechanism 5 described above can prevent the strut portion 1 from rotating in a horizontal plane while allowing the strut portion 1 to swing with respect to the base portion 2, and the socket recess 51 of the strut portion 1 It is possible to prevent the base portion 2 from falling off from the round head convex portion 52. In particular, even in the event of a disaster such as an earthquake or tsunami, the strut portion 1 can be held in place.

A wire such as a wire, a chain, a chain, or the like can be used for the connecting cord 80. These connecting cords 80 have a length and strength that allow the strut portion 1 to swing, but prevent the socket recess 51 of the strut portion 1 from falling off from the round head convex portion 52 of the base portion 2. In the connecting cord 80 shown in the figure, one end is connected to the lower end of the support column 1 and the other end is connected to the base portion 2, but the other end of the connecting cord is connected to the base portion 2 via a fixing member such as an anchor. It can also be fixed to the seabed.

(Other connection structure)
Further, the connecting structure 5 may be the structure shown in FIGS. 9 and 10. The connecting structure 5 shown in these figures has a columnar connecting convex portion 56 protruding downward from the lower end of the column portion 1 and an upper opening formed on the upper surface of the base portion 2 into which the connecting convex portion 56 is inserted. A rubber-like elastic body 58 interposed between the insertion portion 57 and the connecting convex portion 56 is provided with the portion 57. In the support column 1 shown in FIG. 9, a concrete caisson 16 is provided at the lower end portion to form a weight portion 3, and a connecting convex portion 56 protruding downward from the lower end portion is provided. The connecting convex portion 56 shown in the figure is a cylindrical steel pipe 56A, and has a smaller outer diameter than the cylindrical steel pipe 10 constituting the support column 1. The weight portion 3 is formed by filling the steel pipe 56A with the concrete 15 to be filled inside the steel pipe 10 forming the support column 1 to form the connecting convex portion 56. As shown in FIGS. 9 and 10, the connecting convex portion 56 is inserted into the insertion portion 57 formed on the upper surface of the base portion 2, and the lower end of the strut portion 1 is connected to the base portion 2. The base portion 2 shown in the figure is provided with a through hole in the central portion of the pedestal portion 22 to serve as an insertion portion 57. However, the insertion portion may be a recess of the upper opening.

The rubber-like elastic body 58 shown in FIGS. 9 and 10 has a cylindrical shape through which the connecting convex portion 56 can be inserted. The tubular rubber-like elastic body 58 is interposed between the connecting convex portion 56 and the inserting portion 57, suppresses the relative movement between the connecting convex portion 56 and the inserting portion 57, and is inserted into the connecting convex portion 56. Both parts 57 are protected. Further, the rubber-like elastic body 58 shown in the figure is integrally provided with a flange portion 58B protruding in the outer peripheral direction at one end of the tubular main body portion 58A, and the flange portion 58B is provided with the lower surface of the support column portion 1 and the lower surface portion 1. It is interposed between the upper surface of the base portion 2 and the upper surface thereof. The rubber-like elastic body 58 having the above shape is formed by molding elastic rubber into a tubular shape having a predetermined thickness to form a tubular portion 58A and integrally molding a flange portion 58B at one end thereof. Ru. The rubber-like elastic body 58 described above has a tubular shape as a whole, and has a flange portion 58B provided at one end thereof as a base with the lower surface of the strut portion 1 while the tubular portion 58A is interposed between the connecting convex portion 56 and the insertion portion 57. By interposing it between the upper surface of the portion 2 and the upper surface thereof, the strut portion 1 can be swung more stably with respect to the base portion 2.

Here, the landing type offshore pedestal 9 shown in FIG. 2 has the structure shown in FIG. 10, and the support column portion 1 and the base portion 2 are connected via a rubber-like elastic body 58. In this connecting structure 5, the strut portion 1 is connected to the insertion portion 57 of the base portion 2 with the connecting convex portion 56 as an axis, and the strut portion 1 swings with a simple structure due to the elasticity of the rubber-like elastic body 58. acceptable.

Further, the connecting structure 5 shown in FIG. 9 shows an example of a structure that supports the support column portion 1 having a large outer diameter at the lower end portion. In the connecting structure 5 shown in the figure, the support column 1 has a connecting convex portion 56 at the center of the lower end surface, and the base portion 2 has an insertion portion 57 at the center of the upper surface of the pedestal portion 22. Further, in the connecting structure 5 of FIG. 9, a plurality of elastic bodies 59 are interposed between the outer peripheral portion of the lower end surface of the support column 1 and the upper surface of the base portion 2. The elastic body 59 shown in the figure is a coil spring. However, rubber can also be used for the elastic body. In this connecting structure 5, the central portion of the lower surface of the column portion 1 having a large outer shape is connected while being positioned via the connecting convex portion 56 and the insertion portion 57, and the tubular rubber-like elastic body 58 is connected to the connecting convex portion 56. The strut portion 1 is shaken while protecting the insertion portion 57 and increasing the load capacity by the plurality of elastic bodies 9 arranged between the outer peripheral portion of the lower end surface of the strut portion 1 and the upper surface of the base portion 2. Movement is acceptable. In particular, even a strut portion 1 having a large bottom area can stably allow swinging with respect to the base portion 2.

The connecting convex portion 56 in FIG. 9 is formed into a columnar shape by using the steel pipe 56A, but the connecting convex portion may be formed into a polygonal columnar shape, or a conical shape, a pyramid shape, or a truncated cone shape that gradually becomes thinner toward the tip. , Can also be in the shape of a pyramidal cone. Further, the tubular rubber-like elastic body or the insertion portion into which the connecting convex portion having these shapes is inserted can also have a shape that follows the outer shape of the connecting convex portion.

(Other connection structure)
Further, the connecting structure 5 shown in FIGS. 11 to 13 is formed into a recess 61 having a lower opening formed on the lower end surface of the support column 1 and a shape protruding from the upper surface of the base portion 2 and guided to the recess 61. It includes a convex portion 62 and a swing mechanism 60 arranged between the concave portion 61 and the convex portion 62. The support column 1 shown in the figure is provided with a weight portion 3 made of a concrete caisson 16 at the lower end portion, and the central portion of the lower end surface of the weight portion 3 is recessed in a columnar shape to provide a recess 61. The base portion 2 is provided with a convex portion 62 by projecting the central portion of the pedestal portion 22 into a columnar shape. The support column portion 1 and the base portion 2 shown in the figure have a cylindrical shape of the concave portion 61 and the convex portion 62. However, the concave portion 61 and the convex portion 62 may be formed into a polygonal columnar shape.

The swing mechanism 60 includes a cup portion 63 fitted in a concave portion 61 formed on the lower end surface of the support column portion 1, a cap portion 64 covering a convex portion 62 protruding from the upper surface of the base portion 2, and a cup portion 63. It is provided with a plurality of elastic bodies 65 arranged between the inner surface of the cap portion 64 and the outer surface of the cap portion 64. The swing mechanism 60 has an outer shape and size of the cup portion 63 that is fitted into the recess 61 formed on the lower end surface of the support column portion 1. Further, the swing mechanism 60 has an internal shape of the cap portion 63 having a shape and size into which the convex portion 62 formed on the base portion 2 can be fitted. These cup portions 63 and cap portions 64 are preferably formed by processing a metal plate.

Further, the swing mechanism 60 is provided with a gap 66 at a predetermined interval between the inner surface of the cup portion 63 and the outer surface of the cap portion 64, and a plurality of elastic bodies 65 are arranged in the gap 66 to arrange the cup portion 63. The inner surface of the cap portion and the outer surface of the cap portion are connected via an elastic body 65. The cup portion 63 and the cap portion 64 shown in the figure have a cylindrical outer shape. In this swing mechanism 60, a plurality of elastic bodies 65 that absorb a load in the vertical direction are arranged at equal intervals in a gap 66 between the bottom surface of the cup portion 63 and the top surface of the cap portion 64, and the strut portion 1 It has a structure that supports the vertical load of. Further, in the gap 66 between the inner peripheral surface of the cup portion 63 and the outer peripheral surface of the cap portion 64, a plurality of elastic bodies 65 for absorbing a load in the horizontal direction are provided at equal intervals radially in a plan view. .. The elastic body 65 shown in the figure is a coil spring. The swing mechanism 60 relatively moves the cup portion 63 and the cap portion 64 via the plurality of elastic bodies 65, and swings the support portion 1 with respect to the base portion 2 in the direction of 360 degrees in a plan view. It allows movement.

In the swing mechanism 60 having this shape, the cup portion 63 arranged at the lower end portion of the support portion 1 is arranged in a posture of a downward opening, so that seawater fills the gap 66 formed between the cup portion 63 and the cap portion 64. It can be a space that does not invade. Therefore, by using this space as an air layer, it is possible to prevent the elastic body arranged in this gap from coming into contact with seawater and effectively prevent deterioration and corrosion. In the swing mechanism 60 shown in FIG. 11, the gap 66 formed between the cup portion 63 and the cap portion 64 is filled with a lubricant 67 having a specific gravity smaller than that of seawater. As the lubricant 67, the above-mentioned lubricating oil or grease can be used. As described above, the lubricant 67 filled in the gap 66 can cover the elastic body 65 for a long period of time without flowing out into the seawater and can protect it from corrosion and deterioration. In particular, in a structure in which the elastic body 65 is a coil spring made of elastic metal, it is possible to realize a feature that the elastic force can be maintained for a long period of time by effectively preventing corrosion and deterioration of the metal.

In the connecting structure 5 shown in FIG. 11, the outer shapes of the concave portion 61 and the convex portion 62 are cylindrical, and the outer shapes of the cup portion 63 and the cap portion 64 of the swing mechanism 60 arranged between them are also cylindrical. In the connecting structure 5 shown in FIG. 13, the outer shapes of the concave portion 61 and the convex portion 62 have a truncated cone shape, and the outer shapes of the cup portion 63 and the cap portion 64 of the swing mechanism 60 arranged between them also have a truncated cone shape. .. In this swing mechanism 60, a plurality of elastic bodies 65 that absorb a load in the vertical direction are arranged at equal intervals in a gap 66 between the bottom surface of the cup portion 63 and the top surface of the cap portion 64, and the strut portion 1 It has a structure that supports the vertical load of. Further, in the cap portion 64, the outer peripheral surface is a tapered surface with a wide hem, and the inner peripheral surface of the cup portion 63 is a tapered surface that gradually widens downward. The pressing direction is the normal direction of the tapered surface. Therefore, the elastic force of the elastic body 65 can be effectively applied to the force received from the strut portion 1 swinging in the lateral direction, and the load in the inclined direction can be effectively absorbed.

The swing mechanism 60 shown in FIG. 13 has a plurality of elastic bodies 65 as rubber-like elastic bodies. Further, in the swing mechanism 60 shown in FIG. 13, the gap 66 formed between the cup portion 63 and the cap portion 64 is the air layer 68. This prevents the intrusion of seawater into the gap 66 and effectively prevents the elastic body 65 from deteriorating with time due to the seawater.

(Other connection structure 5)
Further, in the connection structure 5 shown in FIG. 14, the first swing shaft 71, which is the swing shaft 70 that swings the lower end portion of the support column 1 in the first direction (indicated by the arrow A in the figure), and the first A second swing shaft 70 that is arranged so as to intersect the swing shaft 71 and swings the lower end portion of the support column 1 in a second direction (indicated by an arrow A in the figure) that intersects the first direction. It is provided with a swing shaft 72. In this connecting structure 5, the strut portion 1 is connected to the base portion 2 via two swing shafts 70 that intersect each other, so that the strut portion 1 is swung in the direction of 360 degrees in a plan view with respect to the base portion 2. The movement is allowed.

The base portion 2 shown in FIG. 14 includes a base portion 25 fixed to the seabed 90 and a rocking body 26 oscillatingly connected to the base portion 25 in a second direction via a second swing shaft 72. It is equipped with. The strut portion 1 is swingably connected to the rocking body 26 in the first direction via the first swing shaft 71. The support column 1 in the figure includes a first swing shaft 71 that protrudes in the radial direction from the side surface of the lower end portion, and the first swing shaft 71 can be rotated to the swing body 26 via the first bearing 73. It is connected to. Further, the rocking body 70 includes a second swing shaft 72 projecting in a direction intersecting the first swing shaft 71, and the second swing shaft 72 is attached to the base portion 25 via the second bearing 74. They are rotatably connected. In the connection structure 5 shown in the figure, the first swing shaft 71 and the second swing shaft 72 are arranged in a horizontal posture and in a direction orthogonal to each other, and the support column portion 1 is smoothly arranged with respect to the base portion 25. It is possible to swing in the direction of 360 degrees.

The connecting structure 5 shown in FIG. 14 has a structure in which the first swing shaft 71 and the second swing shaft 72 are arranged outside the support column 1. In this structure, the first swing shaft 71 and the second swing shaft 72 can be easily and easily connected to a predetermined position. However, although not shown, the connecting mechanism may be provided with a recess having a lower opening on the lower surface of the support column, and may be connected to the base portion via the first swing shaft and the second swing shaft inside the recess. can. This structure is particularly suitable for connecting a strut portion having a large outer diameter to a base portion via two swing shafts. Further, since the first swing shaft and the second swing shaft can be arranged inside the recess of the lower opening provided on the lower surface of the support column, the structure in which the first swing shaft and the second swing shaft do not come into contact with seawater. As a result, deterioration of the swing shaft and bearing can be suppressed.

(Cross body 17)
Further, the landing type offshore pedestal 9 shown in FIGS. 1 and 2 includes a plurality of cords 17 for fixing the support column 1 to the seabed 90. The cord 17 is a wire such as a wire, a chain, a chain, or the like, and has the strength to stably hold the support column 1 when the support column 1 is subjected to strong wind or rough waves due to the influence of a typhoon or the like. ing. The plurality of cords 17 are radially stretched from the intermediate portion of the support column 1 and fixed to the seabed 90. One end of the cord 17 is an intermediate portion of the support column 1, and is fixed to a connecting portion 18 provided in the main body portion 1A arranged in the sea, and the other end thereof is attached to the seabed 90 via the anchor 19. It is fixed. The cord 17 is stretched between the support column 1 and the anchor 19 so that its length and the fixing position by the anchor are determined so as to receive a predetermined tensile force and a predetermined tension is obtained. The plurality of cords 5 radially arranged from the support column 1 are preferably 3 to 6, and the gantry can be stably held.

As shown in FIG. 1, the above-mentioned landing type offshore mount 9 is used as an offshore wind power generator 100 with a wind power generator 30 installed at the upper end of a support column 1, and as shown in FIG. The wind condition observation device 35 is installed at the upper end of the support column 1 and is used as the offshore wind condition observation device 200.

(Wind power generator 30)
As shown in FIG. 1, the wind power generator 30 houses a wind turbine 31 that receives wind power and rotates, a generator 32 that converts the kinetic energy of the rotating wind turbine 31 into electrical energy, and a nacelle that houses the generator 32. A 33 and a tower 34 for arranging the nacelle 33 at a predetermined height are provided. The wind turbine 31 includes a plurality of blades 31A, and the plurality of blades 31A are fixed to the hub 31B provided at the center at equal intervals. The wind power generator 30 is installed on the landing type offshore pedestal 9 with the base of the tower 34 fixed to the upper end of the support column 1. The offshore wind power generator 100 shown in the figure is the base of the tower 34, and is provided with a platform portion 36 for work along the outer periphery of the upper end of the support column portion 1.

The wind power generator 30 shown in FIG. 1 is a downwind type wind turbine 31. Further, in this wind power generator 30, by fixing the nacelle 33 to the upper end of the tower 34 at a predetermined angle, the wind turbine 31 is in a state where the tower 34 extended from the support column 1 swings to the leeward side. The axis of rotation is set to be horizontal. The wind power generator 30 is arranged so that the rotation axis of the wind turbine 31 has a predetermined elevation angle with respect to the horizontal plane orthogonal to the axis of the tower 34 in the traveling direction of the down window. In this offshore wind power generation device 100, the wind turbine 31 of the wind power generator 30 is a downwind type, and the rotation axis of the wind turbine 31 is arranged at a predetermined elevation angle. Can generate electricity in a stable manner without reducing the amount of electricity.

(Wind condition observation aircraft 35)
In the landing type offshore pedestal 9 shown in FIG. 2, a platform portion 36 is provided in a horizontal posture on the upper end of a support column 1 arranged so that the upper end portion protrudes offshore, and wind conditions are observed on the platform portion 36. The machine 35 is installed. As shown in FIG. 2, the various wind condition observation aircraft 35 for observing the wind condition for wind power generation are an anemometer, an anemometer, a wind meter, and the like. These wind condition observation aircraft 35 detect the wind direction, the wind volume, and the wind speed at the observation point and observe the wind condition. In particular, at present, wind condition data measured by a floating wind condition observation device is not treated as formal wind condition data. Therefore, reliable wind condition measurement can be realized by using such a landing type offshore pedestal 9.

Further, in the landing type offshore pedestal 9, in addition to the wind power generator 30 and the wind condition observation aircraft 35, various monitoring devices and various observation devices can be installed. Examples of such a device include a bird radar, a surveillance camera, a weather radar for meteorological observation, and the like.

The landing type offshore pedestal of the present invention can be suitably used as a gantry for supporting an offshore wind power generator or a wind condition observing machine that measures meteorological data such as wind conditions at sea.

100 ... Offshore wind power generator 200 ... Offshore wind condition observation device 1 ... Strut part 1A ... Main body part 1B ... Protruding part 1C ... Thick cylinder part 2 ... Base part 3 ... Weight part 4 ... Floating body part 5 ... Connecting structure 9 ... Landing Ceremony offshore pedestal 10 ... Steel pipe 11 ... Flange 12 ... Connecting tool 13 ... Partition 13A ... Sanding plate 13B ... Split plate 14 ... Hollow part 14A ... Partition room 15 ... Concrete 16 ... Concrete cason 17 ... Cable 18 ... Connecting part 19 ... Anchor 21 ... Concrete cason 22 ... Pedestal 23 ... Outer circumference 24 ... Pile member 25 ... Base 26 ... Rocking body 30 ... Wind power generator 31 ... Wind turbine 31A ... Blade 31B ... Hub 32 ... Generator 33 ... Nacelle 34 ... Tower 35 ... Wind condition observer 36 ... Platform part 40 ... Sub floating body part 41 ... Center hole 42 ... Fixed member 43 ... Pump 44 ... Ballast water 51 ... Socket recess 52 ... Round head convex part 52a ... Upper end surface 52b ... Outer peripheral part 53 ... Lubricator 54 ... Adjacent gap 55 ... Inflow groove 55a ... Radial groove 55b ... Ring-shaped groove 55c ... Sub-radial groove 56 ... Connecting convex portion 56A ... Steel pipe 57 ... Insertion portion 58 ... Rubber-like elastic body 58A ... Cylindrical portion 58B ... Flange Part 59 ... Elastic body 60 ... Swing mechanism 61 ... Recessed portion 62 ... Convex part 63 ... Cup part 64 ... Cap part 65 ... Elastic body 66 ... Gap 67 ... Lubricant 68 ... Air layer 70 ... Swing shaft 71 ... First swing Dynamic shaft 72 ... Second swing shaft 73 ... First bearing 74 ... Second bearing 80 ... Connecting cord 81 ... Connecting part 82 ... Fixed part 90 ... Seabed

Claims (5)

It is a stand for installing a wind power generator that generates wind power or a wind condition observer that measures wind condition data for wind power generation at sea.
A support column in which the lower end is arranged on the seabed and the upper end is extended in the vertical direction so as to protrude to the ocean, and the wind power generator or the wind condition observation machine is installed at the upper end.
A base part that is installed on the seabed and is connected to the lower end of the support column,
Equipped with
The strut portion
A hollow floating body portion is provided, and a weight portion for sinking the support portion is provided at the lower end portion.
The buoyant center of buoyancy acting on the floating body portion is arranged above the center of gravity of the weight portion so as to hold the strut portion in a vertical posture, and further.
The lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing.
The connection structure is
A socket recess having a curved inner surface with a lower opening formed on the lower end surface of the support column,
It is provided with a round head convex portion that protrudes from the upper surface of the base portion and has a spherical tip portion.
The inside of the socket recess is filled with a lubricant having a specific density smaller than that of seawater.
Further, an inflow groove for allowing the lubricant to flow is provided in the contact region between the socket concave portion and the round head convex portion.
The strut portion is provided with a plurality of inflow grooves intersecting each other on the inner surface of the socket recess.
The inflow groove is provided with a plurality of radial grooves extending radially from the center of the socket recess and a plurality of concentric ring-shaped grooves in a bottom view, and the radial groove and the ring-shaped groove intersect each other. In addition, a sub-radial groove connecting the plurality of ring-shaped grooves is provided between the adjacent radial grooves.
The round head convex portion guided to the socket recess is brought into surface contact with the inner surface of the socket recess to allow the strut portion to swing in the direction of 360 degrees in a plan view with respect to the base portion. A featured landing-type offshore pedestal. It is a stand for installing a wind power generator that generates wind power or a wind condition observer that measures wind condition data for wind power generation at sea.
A support column in which the lower end is arranged on the seabed and the upper end is extended in the vertical direction so as to protrude to the ocean, and the wind power generator or the wind condition observation machine is installed at the upper end.
A base part that is installed on the seabed and is connected to the lower end of the support column,
Equipped with
The strut portion
A hollow floating body portion is provided, and a weight portion for sinking the support portion is provided at the lower end portion.
The buoyant center of buoyancy acting on the floating body portion is arranged above the center of gravity of the weight portion so as to hold the strut portion in a vertical posture, and further.
The lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing.
The connection structure is
A socket recess having a curved inner surface with a lower opening formed on the lower end surface of the support column,
It is provided with a round head convex portion that protrudes from the upper surface of the base portion and has a spherical tip portion.
In the round head convex portion, the radius of curvature (R2) of the upper end surface is made equal to or smaller than the radius of curvature (R1) of the inner surface of the socket recess, and the upper end surface facing the socket recess is the socket recess. In addition to being in contact with the inner surface, the radius of curvature (R3) of the outer peripheral portion is made smaller than the radius of curvature (R2) of the upper end surface.
Further, the round head convex portion has the area of the upper end surface, which is the contact surface with the socket recess, equal to or larger than the area of the cross section of the support column portion .
The round head convex portion guided to the socket recess is brought into surface contact with the inner surface of the socket recess to allow the strut portion to swing in the direction of 360 degrees in a plan view with respect to the base portion. A featured landing-type offshore pedestal. The landing-type offshore pedestal according to claim 1 or 2 , further
The connection structure is
A landing-type offshore pedestal including a plurality of connecting cords for connecting the lower end portion of the support column portion and the base portion. It is a stand for installing a wind power generator that generates wind power or a wind condition observer that measures wind condition data for wind power generation at sea.
A support column in which the lower end is arranged on the seabed and the upper end is extended in the vertical direction so as to protrude to the ocean, and the wind power generator or the wind condition observation machine is installed at the upper end.
A base part that is installed on the seabed and is connected to the lower end of the support column,
Equipped with
The strut portion
A hollow floating body portion is provided, and a weight portion for sinking the support portion is provided at the lower end portion.
The buoyant center of buoyancy acting on the floating body portion is arranged above the center of gravity of the weight portion so as to hold the strut portion in a vertical posture, and further.
The lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing.
A columnar or conical connecting convex portion in which the connecting structure projects downward from the lower end of the strut portion,
An insertion portion of an upper opening formed on the upper surface of the base portion and into which the connecting convex portion is inserted,
A rubber-like elastic body interposed between the insertion portion and the connecting convex portion is provided.
The rubber-like elastic body has a cylindrical shape through which the connecting convex portion can be inserted, and has a flange portion integrally provided at one end thereof.
A landing-type offshore pedestal in which the flange portion is interposed between the lower surface of the support column portion and the upper surface of the base portion. It is a stand for installing a wind power generator that generates wind power or a wind condition observer that measures wind condition data for wind power generation at sea.
A support column in which the lower end is arranged on the seabed and the upper end is extended in the vertical direction so as to protrude to the ocean, and the wind power generator or the wind condition observation machine is installed at the upper end.
A base part that is installed on the seabed and is connected to the lower end of the support column,
Equipped with
The strut portion
A hollow floating body portion is provided, and a weight portion for sinking the support portion is provided at the lower end portion.
The buoyant center of buoyancy acting on the floating body portion is arranged above the center of gravity of the weight portion so as to hold the strut portion in a vertical posture, and further.
The lower end portion of the strut portion is connected to the base portion via a connecting structure that allows the strut portion to swing.
The connection structure is
The recess of the lower opening formed on the lower end surface of the support column,
A convex portion that protrudes from the upper surface of the base portion and is guided to the concave portion,
It is provided with a swing mechanism arranged between the concave portion and the convex portion.
The swing mechanism is
A cup portion fitted in the recess formed on the lower end surface of the support column portion, and a cup portion
A cap portion that covers the convex portion protruding from the upper surface of the base portion, and a cap portion.
It is provided with a plurality of elastic bodies arranged between the inner surface of the cup portion and the outer surface of the cap portion.
It is characterized in that the cup portion and the cap portion are relatively moved via the plurality of elastic bodies to allow the strut portion to swing in the direction of 360 degrees in a plan view with respect to the base portion. Landing type offshore pedestal.

Images