TW202122682A - Bottom-mounted offshore platform, offshore wind power generation device, and offshore wind condition observation device - Google Patents

Abstract

Provided is a bottom-mounted offshore platform which, being bottom-mounted, can be installed offshore at low cost while enabling stable power generation and wind condition measurement. The bottom-mounted offshore platform is used to install a wind power generator 30 or a wind condition observation machine 35 on the ocean, and is provided with: a column part 1 having a lower end thereof arranged on an ocean floor 90, extending in a vertical direction with an upper end thereof protruding from the ocean, and having the wind power generator 30 or the wind condition observation machine 35 installed at the upper end; and a base part 2 that is installed on the ocean floor 90 and to which the lower end of the column part 1 is coupled. The column part 1 has a hollow floating part 4 and has at the lower end a weight part 3 that sinks the column part 1. The center F of buoyancy acting on the floating part 4 is located above the center G of gravity of the weight part 3 so as to hold the column part 1 in a vertical position. In addition, the lower end of the column part 1 is coupled to the base part 2 via a coupling structure 5 that allows oscillation of the column part 1.

Description

Implantation type offshore platform, offshore wind power generation device and offshore wind condition observation device

The present invention relates to an imbedded offshore platform that becomes a base for supporting a wind turbine installed on the sea or a wind condition observation machine for measuring wind conditions and other meteorological data at sea, and the implanted offshore platform Offshore wind power generation devices equipped with wind turbines, and offshore wind observation devices equipped with wind observation machines.

With the depletion of petroleum resources in recent years, renewable energy represented by solar energy has attracted attention. However, because solar power generation changes greatly due to weather and cannot generate power at night, wind power generation is attracting attention as a replacement for renewable energy. Since wind power generation near homes has been pointed out that there are problems such as low frequency noise, in order to avoid this, attention has been paid to installing wind power generation equipment on the sea. In order to install offshore wind power generators, a platform (platform) for installing generators on the sea is required. In addition, when installing offshore wind turbines, it is necessary to observe wind conditions such as wind direction, air volume, wind speed, etc. at the sea where the candidate is scheduled to be installed for the selection of the installation environment or the evaluation of the power generation capacity.

However, because offshore platforms installed on the sea are affected by typhoons, strong winds, and waves, it is not easy to be able to withstand these and to install them stably. In particular, the construction is complicated and costly in order to be firmly fixed to the seabed. On the other hand, if it is firmly fixed to the bottom of the sea, it will become more resistant to resistance, so higher rigidity is sought. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2017-161392 [Patent Document 2] Japanese Patent No. 3951631

[The problem to be solved by the invention]

The present invention was completed in view of the above-mentioned problems. One of its objectives is to provide an implantable offshore platform that realizes stable power generation or wind measurement by setting it as an implantation type, and can be installed at a low cost on the sea. Wind observation device and offshore wind power generation device. [Technical means to solve the problem and the effect of the invention]

The anchored offshore platform of the first embodiment of the present invention is used to install a wind turbine for wind power generation or a wind condition observation machine for measuring wind condition data for wind power generation on an offshore platform, and includes: pillars The lower end is arranged on the seabed, and the upper end protrudes to the sea to extend upward and downward, and the upper end is provided with a wind generator or wind condition observation machine; and the base part is arranged on the seabed for connecting the lower end of the pillar part. The pillar part includes a hollow floating body part, and at the lower end part, a plumb part that makes the pillar part sink is included. The buoyancy center of the buoyancy acting on the floating body part is arranged above the center of gravity of the plumb body part, and the pillar part Maintain a vertical posture, and furthermore, the lower end of the pillar part is connected to the base part via a connecting structure that allows the pillar part to swing.

According to the above-mentioned structure, the bottom end of the support column held in the vertical posture by the floating body and the plumb part is connected to the base part installed on the seafloor through a connection structure that allows shaking, thereby achieving implantation stability. It can measure power generation or wind conditions, and achieve excellent resistance to typhoons, strong winds, and sea waves, and can be set up stably for a long time.

The second embodiment of the present invention has a connecting structure for an immobilization type offshore mount, which includes: a socket recess formed in the lower opening of the lower end surface of the pillar portion and the inner surface is curved; and a round-headed convex portion, which It protrudes from the upper surface of the base part, and the front end is spherical; and the round-headed convex part guided to the socket recess is in surface contact with the inner surface of the socket recess, allowing the pillar part to look down relative to the base part. Shake down 360 degrees.

According to the above-mentioned structure, it is set to guide the round-head convex portion protruding from the upper surface of the base portion to the socket concave portion formed on the lower end surface of the pillar portion, so that the front end surface of the round-head convex portion and the inner peripheral surface of the socket concave portion The contact connection structure allows the pillar portion to swing 360 degrees in a plan view with respect to the base portion and stably supports it. In particular, since this connection structure guides the round-headed convex portion protruding from the upper surface of the base portion to the socket recessed portion provided on the lower end surface of the pillar portion, the contact portion of the socket-shaped recessed portion and the round-headed convex portion is completely There is no accumulation of mud or foreign matter in the seawater, and the contact state of the socket concave part and the round head convex part can be maintained in a good state. Therefore, the pillar portion can be stably swayed relative to the base portion for a long period of time.

In the third embodiment of the present invention, the connection structure of the implanted offshore platform is to fill the inner side of the socket recess with a lubricant whose specific gravity is smaller than that of seawater.

According to the above configuration, the lubricating agent is filled in the inner side of the socket concave part of the lower opening provided on the lower end surface of the pillar part, and the contact resistance between the socket concave part and the round convex part is reduced by the lubricant, and the pillar part can be made Shake steadily with respect to the base. In particular, in the sea, since the inner side of the socket recess that opens below is filled with a lubricant with a smaller specific gravity than seawater, the lubricant will not flow out of the socket recess, and the long-term residual on the inner side of the socket recess can reduce the bearing capacity. The contact resistance between the concave part of the socket and the convex part of the round head. In addition, even if the lubricant decreases over time, it can be easily replenished and a good contact state can be maintained.

The anchoring type offshore platform of the fourth embodiment of the present invention is further provided with an inflow groove for allowing lubricant to flow in the contact area between the socket concave portion and the round head convex portion. According to the above configuration, the lubricant can be allowed to flow into the inflow groove provided in the contact area between the socket concave portion and the round head convex portion, and the contact resistance of the contact surface between the socket concave portion and the round head convex portion can be reduced, and smooth sliding can be achieved.

The connection structure of the implant-type offshore mount according to the fifth embodiment of the present invention further includes a plurality of connection rope bodies that connect the lower end of the pillar portion and the base portion. According to the above configuration, it is possible to allow the pillar portion to swing with respect to the base portion, prevent the pillar portion from rotating in a horizontal plane, and prevent the socket concave portion of the pillar portion from falling off from the round convex portion of the base portion.

The connection structure of the implant-type offshore platform according to the sixth embodiment of the present invention includes: a columnar or even cone-shaped connection convex part protruding downward from the lower end of the pillar part; an upper opening insertion part formed on the base part The upper surface is for insertion of the connecting convex part; and a rubber-like elastic body, which is interposed between the insertion part and the connecting convex part.

According to the above configuration, the pillar portion and the base portion can be connected at a fixed position by inserting the connecting convex portion provided on the pillar portion into the insertion portion provided on the base portion, and the rubber-like elastic body can be interposed in the pillar portion Between the insertion part and the insertion part, the rubber-like elastic body absorbs the positional deviation between the connection convex part and the insertion part, and allows the support part to shake.

The rubber-like elastic system of the implantable offshore platform of the seventh embodiment of the present invention can be inserted through the cylindrical shape of the connecting convex part, and is integrally provided with a flange part at one end, and the flange part is interposed under the pillar part Between the surface and the upper surface of the base.

According to the above configuration, by using the rubber-like elastic body as a cylindrical shape through which the connecting convex portion can be inserted, the cylindrical portion can be interposed between the connecting convex portion and the insertion portion, and the flange portion provided on the upper end edge can be interposed Between the lower surface of the pillar portion and the upper surface of the base portion, the pillar portion is rocked more stably with respect to the base portion.

In the eighth embodiment of the present invention, the pillar portion of the implantable offshore mount includes a connecting convex portion at the center of the lower end surface, and the center portion of the base portion on the upper surface includes an insertion portion, and the outer periphery of the lower end surface of the pillar portion is connected with A plurality of elastomers are interposed between the upper surface of the base.

According to the above configuration, the connecting convex portion provided at the center portion of the lower end surface of the pillar portion is arranged on the insertion portion provided at the center portion of the upper surface of the base member through the rubber-like elastic body, and is placed on the lower end surface of the pillar portion A plurality of elastic bodies are interposed between the outer peripheral part and the upper surface of the base part, and even if it is a pillar part with a wide base area, it can shake stably with respect to the base part.

The connection structure of the implantable offshore platform of the ninth embodiment of the present invention includes: a concave portion with a lower opening formed on the lower end surface of the pillar portion; a convex portion that protrudes from the upper surface of the base portion and is guided to the concave portion; and The swing mechanism is arranged between the concave portion and the convex portion. The rocking mechanism includes: a cup part which is fitted into a concave part formed on the lower end surface of the pillar part; a cap part which covers a convex part protruding from the upper surface of the base part; and a plurality of elastic bodies which are arranged in the cup part Between the inner surface and the outer surface of the cap portion; and a plurality of elastic bodies are interposed to make the cup portion and the cap portion move relative to each other, and allow the pillar portion to swing 360 degrees in a plan view with respect to the base portion.

According to the above-mentioned structure, the concave part provided in the lower opening of the lower end surface of the pillar part and the convex part protruding from the upper surface of the base part are connected by the rocking mechanism, and the rocking mechanism includes the cup part that is fitted into the concave part and the covering convex part. The cap part of the part and the plurality of elastic bodies arranged between them can allow the support part connected by the plurality of elastic bodies to shake relative to the base part. In particular, this connection structure is in a state where the cap part covering the convex part protruding from the upper surface of the base part is guided to the cup part fitted in the concave part of the lower opening provided on the lower end surface of the pillar part. A plurality of elastic bodies are arranged between the cover and the cap, so it can effectively prevent mud or foreign matter in the seawater from intruding between the cup and the cap with the elastic body, and make the pillar part stably shake with respect to the base part for a long time. .

In the 10th embodiment of the present invention, the rocking mechanism of the anchor type offshore platform is to provide a gap between the inner surface of the cup part and the outer surface of the cap part, and use the gap as an air layer.

According to the above configuration, a gap is provided between the inner surface of the cup part and the outer surface of the cap part, and the gap is used as an air layer to prevent seawater from being flooded. Therefore, it is possible to prevent the gap between the cup part and the cap part. The multiple elastic bodies in the gap are in contact with seawater, and effectively prevent the elastic bodies from deteriorating over time.

In the eleventh embodiment of the present invention, the rocking mechanism of the implantable offshore platform is to provide a gap between the inner surface of the cup part and the outer surface of the cap part, and fill the gap with a lubricant whose specific gravity is less than that of seawater.

According to the above configuration, since the gap formed between the inner surface of the cup part and the outer surface of the cap part is filled with a lubricant whose specific gravity is less than seawater, the lubricant can protect the elastic body arranged in the gap and effectively prevent Deteriorate over time. In particular, since the gap formed between the inner side of the cup portion opened below and the cap portion guided to the cup portion is filled with a lubricant whose specific gravity is less than seawater, the lubricant will not flow out of the cup portion. The long-term remaining in the gap between the cup part and the cap part can protect the elastic body. In addition, even if the lubricant decreases over time, it can be easily replenished.

The anchoring type offshore platform of the twelfth embodiment of the present invention uses a plurality of elastic bodies as rubbers or springs.

The connection structure of the immobilization type offshore platform of the thirteenth embodiment of the present invention includes: a first rocking shaft, which becomes a rocking shaft for rocking the lower end of the pillar portion in a first direction; and a second rocking shaft, which is connected to the first rocking shaft. The rocking shafts are arranged crosswise to form a rocking shaft for rocking the lower end of the pillar portion in a second direction intersecting the first direction; and the pillar portion is allowed to rock in a 360-degree direction in a plan view with respect to the base portion.

According to the above configuration, since the connecting structure allows the pillar portion to swing through the intersecting first and second swing axes, the pillar portion can be allowed to swing in a 360-degree direction in a plan view with respect to the base portion.

The base part of the implantable offshore platform of the 14th embodiment of the present invention includes a base part fixed to the seabed, a rocking body swayably connected to the base part in a second direction through a second rocking axis, and a pillar The part is connected to the oscillating body freely via the first oscillating shaft in the first direction, and the first oscillating shaft and the second oscillating shaft are arranged in directions orthogonal to each other.

In the fifteenth embodiment of the present invention, the pillar part of the imbedded offshore platform is arranged in a part under the sea surface with a larger outer diameter than the other parts, and a thick cylindrical part is provided, and the thick cylindrical part is hollow as a floating body Part of the Ministry.

The anchoring type offshore platform of the sixteenth embodiment of the present invention further includes a cylindrical and hollow sub-floating body part that is detachably connected to the pillar part, and the sub-floating body part is arranged below the sea surface along the pillar part inserted in the center .

The offshore wind power generator of the seventeenth embodiment of the present invention is an offshore wind power generator that includes any of the above-mentioned implantable offshore mounts, and includes the implantable offshore mount, and a wind generator installed at the upper end of the pillar.

The wind power generator of the offshore wind power generation device of the 18th embodiment of the present invention includes a downwind windmill.

According to the above configuration, since the wind turbine includes a downwind wind turbine, it can generate power stably without lowering the power generation efficiency even in a state where the pillar portion is swayed to the downwind side.

The offshore wind observation device of the nineteenth embodiment of the present invention is an offshore wind observation device that includes any of the above-mentioned implantable offshore platforms, and includes an implantable offshore platform, and a wind observation machine installed on the upper end of the pillar. , The pillar part includes a platform part at the upper end, and a wind condition observation machine is installed on the platform part.

Hereinafter, an embodiment of the present invention will be described based on the drawings. However, the embodiments shown below are examples for embodying the technical idea of the present invention, and the present invention is not limited to the following. In addition, this specification does not specify the members shown in the scope of the patent application to the members of the embodiment. In particular, the dimensions, materials, shapes, and relative arrangements of the constituent parts described in the embodiments are not intended to limit the scope of the present invention to these, but are merely illustrative examples, as long as there is no specific description. In addition, the size or positional relationship of the components shown in the drawings are sometimes exaggerated for clarity. Furthermore, in the following description, for parts with the same name and symbol indicating the same or the same material, the detailed description is appropriately omitted. Furthermore, each element constituting the present invention may be a form in which a plurality of elements are constituted by the same member and a plurality of elements are shared by one member, or a plurality of members may be used instead to share and realize the functions of a part of the members.

The anchored offshore platform of the present invention is used to install a wind generator for wind power generation or a wind condition observation machine for measuring wind condition data for wind power generation on an offshore platform. This implanted offshore platform is mainly used for installing wind turbines or wind condition observers in the ocean with a water depth of 20 m to 100 m. However, the bed-mounted offshore platform of the present invention is not only used on the ocean, but also on the bottom of a lake with a specific water depth as a platform for arranging wind generators or wind condition observers on the water surface. Therefore, in this specification, the term "on the sea" is used in a broad sense not including on the ocean but also on the lake.

(Implantation type offshore stand 9) Figure 1 shows an example of an offshore wind power generation device 100 with a wind generator 30 installed on the implanted offshore platform 9, and Figure 2 shows an offshore wind observation device with a wind observation machine 35 installed on the implanted offshore platform 9 One of 200 cases. The embedded offshore platform 9 shown in these figures includes: a pillar 1 whose lower end is arranged on the seabed 90, and the upper end protrudes to the sea to extend upward and downward, and a wind generator 30 or wind condition observation is arranged on the upper end Machine 35; and the base part 2, which is set on the bottom of the sea 90, for connecting the lower end of the pillar part 1.

(Pillar 1) The pillar 1 shown in FIGS. 1 and 2 is a columnar shape extending in the up and down direction, and the lower end is arranged on the sea bottom 90 and the upper end protrudes to the sea surface in a vertical posture arranged in the sea. In order to arrange the pillar 1 extending in the vertical direction from the bottom of the sea 90 to the sea surface, the pillar 1 is provided at the lower end with a plumb part 3 for sinking the pillar 1 to lower the center of gravity G, and the upper interior is made hollow The floating body portion 4 is provided, and the center of buoyancy F of the floating body portion 4 is arranged at a position higher than the center of gravity G. Thereby, the support|pillar part 1 arrange|positioned in the up-down direction can be maintained in a vertical posture.

The pillar 1 has a lower end disposed on the sea bottom 90, and an upper end protruding to the full length of the sea. The pillar 1 extending from the sea bottom 90 to the sea is arranged in a vertical posture, and the lower end of the main body 1A arranged in the sea is connected to the base part 2 provided on the sea bottom 90, and at the protrusion 1B protruding to the sea surface A wind power generator 30 or a wind condition observation machine 35 is provided at the upper end. The pillar 1 is arranged in a posture where the upper end protrudes from the sea surface by 5 m to 10 m. Therefore, the total length of the pillar 1 is 5 m to 10 m longer than the water depth of the installation site. For example, in a built-in offshore platform 9 installed in a sea area with a water depth of 50 m, the total length of the pillar 1 is set to 55 m-60 m, and the upper end protrudes 5-10 m above the sea.

The pillar portion 1 shown in Figs. 1 and 2 is formed of a cylindrical steel pipe 10 having a specific outer diameter as shown in Fig. 3. The pillar portion 1 formed by the cylindrical steel pipe 10 is formed by connecting a plurality of steel pipes 10 to a predetermined length. The pillar portion 1 shown in Figs. 1 and 2 connects a plurality of steel pipes 10 having a length of 10 m to several tens of m to set a specific total length. Each steel pipe 10 shown in FIG. 3 is provided with a flange portion 11 protruding to the outside along the end edge, and the opposing flange portions 11 are connected with each other via a connecting tool 12, thereby connecting a plurality of steel pipes 10 in a straight line. Specific full length. However, the length of the steel pipe 10 used or the number of connections can be changed in various designs. In this way, the structure of the pillar portion 1 formed by a plurality of steel pipes 10 uses the existing steel pipes, thereby reducing the manufacturing cost, and has the advantages of being simple and easy to manufacture.

(Floating body part 4) In order to arrange the support|pillar part 1 in a stable posture, it contains the floating body part 4 which made at least a part hollow. The pillar portion 1 composed of a cylindrical steel pipe 10 is arranged in a main body portion disposed in the sea, and a floating body portion 4 is formed with a hollow area inside. The floating body part 4 reduces the weight for buoyancy by making the interior hollow, thereby substantially increasing the buoyancy.

The pillar portion 1 formed by a plurality of steel pipes can also set the entire interior of the steel pipe as a space to form a floating body portion, but it is preferable to provide a partition wall 13 inside to divide the hollow portion 14 forming the floating body portion 4 into a plurality of pieces area. The floating body part 4 shown in FIG. 3 is provided with a plurality of partition walls 13, and the hollow part 14 is divided into a plurality of compartments 14A. The pillar portion 1 shown in FIG. 3 is formed by sandwiching a plate 13A between steel pipes 10 that are connected to each other, and the sandwiching plate 13A is used as a partition wall 13. The clamping 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 pipe 10, and is sandwiched between the opposing flanges 11 in a close state, and is divided into phases. The adjacent steel pipes 10 are inside each other. Since the sandwiching plate 13A is interposed with the flange portion 11 of the steel pipe 10, the compartment 14A of each of the compartments 14A can be closed into a watertight structure.

Furthermore, the pillar portion 1 shown in FIG. 3 is located in the middle part of the steel pipe 10, and a dividing plate 13B that divides the inner region of the steel pipe 10 is provided as a partition wall 13. The dividing plate 13B shown in the figure has an outer shape along the inner and outer shapes of the steel pipe 10, and is fixed in a state where the outer circumferential surface is closely adhered to the inner circumferential surface of the steel pipe 10, and divides the inside of the steel pipe 10 into a plurality of compartments 14A.

As described above, the partition wall 13 divides the inner hollow portion 14 formed in the pillar portion 1 into a plurality of compartments 14A. Even if the interior of the floating body portion 4 is flooded with water, the partition wall 13 can suppress the expansion of the flooded area. , And the inner part of the floating body 4 is divided into a plurality of parts by the partition wall 13, thereby the position of the center of buoyancy acting on the floating body 4 (hereinafter referred to as the buoyancy center F) can be stabilized, and the pillar 1 can be maintained In a vertical posture.

Here, the buoyancy P acting on an object in the seawater is obtained by multiplying the volume of the object immersed in the seawater by the specific gravity of the seawater. That is, the size of the buoyancy P is proportional to the volume of the object in the sea. Therefore, the floating body portion 4 obtains a greater buoyancy P by enlarging the outer diameter of the pillar portion 1. Therefore, the pillar portion 1 is adjusted to the optimum outer diameter in consideration of the buoyancy P required by the stand. The outer diameter of the pillar portion 1 is also changed according to the equipment installed on the pillar portion 1 or the water depth of the sea area where the bed-type offshore stand 9 is installed. For example, as shown in FIG. 1, the pillar portion 1 supporting the heavy-weight wind generator 30 can increase the buoyancy by increasing the outer diameter. As shown in Figure 1, in a built-in offshore platform 9 with a water depth of 40 m-100 m and a wind generator 30 installed at the upper end, the outer diameter of the pillar 1 can be set to 5 m-12 m , Preferably 7-10 m. As shown in Fig. 2, in the sea area with a water depth of 20 m～50 m, and a wind observation machine 35 is arranged at the upper end of the built-in offshore platform 9, the outer diameter of the pillar 1 can be set to 1 m～ 4 m.

Furthermore, the pillar portion 1 shown in Figs. 1 and 2 will be arranged in a part under the sea surface with a larger outer diameter than the other parts to provide a thick cylindrical portion 1C, and the inside of the thick cylindrical portion 1C is made hollow. A part of the floating body part 4. In this way, by providing the thick cylindrical portion 1C with a larger outer diameter than the main body portion 1A, the buoyancy P acting on the floating body portion 4 can be further increased. In addition, the pillar portion 1 having the thick cylindrical portion 1C has a thick cylindrical portion 1C with a large surface area near the sea surface, and when the lower end of the pillar portion 1 is used as a fulcrum, it also has an enlarged effect on the pillar portion 1. The resistance of the upper water suppresses the effect of shaking. For example, by setting the outer diameter of the thick cylindrical portion 1C to be 1.5 to 2 times the outer diameter of the main body portion 1, the buoyancy force acting on the area can be increased by 2 to 4 times.

(Sub-buoy part 40) Furthermore, as shown in FIG. 4, the pillar portion 1 may include a sub-floating body portion 40 that is detachably connected to the pillar portion 1. The sub-floating body part 40 shown in the figure has a cylindrical shape as a whole, and has a hollow shape inside to generate buoyancy in the sea. The sub-floating body part 40 shown in the figure opens a central hole 41 so that the pillar part 1 can be inserted inside, and can move up and down along the pillar part 1 in a state where the central hole 41 is inserted through the pillar part 1. The sub-floating body part 40 is the same as the thick tube part 1C in FIG. 1 and is fixed to the pillar part 1 in a manner of being arranged under the sea surface, thereby increasing the buoyancy acting on the pillar part. The sub-floating body portion 40 shown in the figure can be fixed to the main body portion 1A of the pillar portion 1 with the fixing member 42 interposed therebetween.

For example, by using the sub-floating body portion 40 according to the load of the wind generator 30 installed on the pillar portion 1, the load supported by the pillar portion 1 can be adjusted. In other words, by selectively using sub-floating body parts 40 of different sizes according to the weight of the wind generator 30 installed on the pillar part 1, the magnitude of the buoyancy acting on the pillar part 1 can be adjusted. Furthermore, the sub-floating body 40 can also adjust the buoyancy by using a pump 43 or the like to make the ballast water 44 flow in and out because the ballast water 44 is filled inside. When the implantable offshore stand 9 is installed in the sea, the sub-floating body portion 40 is filled with ballast water 44 in advance, and is installed on the upper end of the pillar portion 1 installed at a fixed position when, for example, the pillar portion 1 including the sub-floating body portion 40 is installed In the case of the wind power generator 30, the ballast water 44 inside the sub-floating body 40 is discharged to generate buoyancy, which can increase the buoyancy supporting the wind power generator 30. In this way, the anchoring type offshore platform 9 having the sub-floating body portion 40 through which the ballast water 44 can enter and exit freely can adjust the buoyancy acting on the pillar portion 1, and the installation operation of the offshore wind power generation device 100 can be efficiently performed.

The above pillar part 1 is in a state where the lower end part sinks in the sea under its own weight and is connected to the base part 2 installed on the bottom of the sea 90. In order to stabilize the pillar part 1 and maintain it in a vertical posture, it is configured to act on the floating body part 4 The center of buoyancy F of the buoyancy is located above the center of gravity G of the plumb part 3 provided at the lower end. That is, the pillar portion 1 extending upward and downward, by arranging the center of buoyancy F of the buoyancy P acting upward on the floating body portion 4 above, the center of gravity G of the gravity W acting downward on the plumb portion 3 is set at The lower center of gravity is low while maintaining a vertical posture.

(Plumb part 3) Furthermore, the pillar part 1 shown in FIG. 1 and FIG. 2 is equipped with the plumb part which makes the pillar part 1 sink at the lower end part. The plumb part 3 is formed by forming the lower end of the pillar part 1 to be solid, so that the center of gravity G of the pillar part 1 can be arranged below. The pillar part 1 shown in Fig. 3 is in the lower end part. The inside of the steel pipe 10 is filled with concrete 15, and the lower end part is provided with a concrete caisson 16 with a larger outer diameter than the body part 1A of the pillar part 1, resulting in a heavier weight The plumb weight part 3 achieves a low center of gravity. The concrete caisson 16 in FIG. 5 is the lower end of the steel pipe 10 inserted and formed, and the concrete 15 and the concrete caisson 16 filled at the lower end of the steel pipe 10 are integrally connected.

According to this structure, the weight of the plumb portion 3 formed at the lower end of the pillar portion 1 is increased, and the center of gravity G of the pillar portion 1 is arranged below, so that the pillar portion 1 can be maintained in a vertical posture more stably. However, the plumb portion 3 does not necessarily have an outer diameter larger than that of the main body portion 1A of the pillar portion 1, and may be set to an outer diameter equal to that of the pillar portion 1. In addition, although not shown in the figure, the pillar portion may be connected to a hammer including a member different from the pillar portion to the lower end to form the plumb portion 3. The above-mentioned pillar part 1 smoothly sinks to the bottom of the sea using the plumb part 3 formed by the concrete 15 filled at the lower end part and the concrete caisson 16 formed at the lower end part as a sinker.

(Base part 2) The base part 2 is installed on the bottom of the sea 90, and the lower end of the pillar part 1 is connected. The base part 2 shown in FIG. 5 serves as a concrete caisson 21. The concrete caisson 21 is made of reinforced concrete formed into a specific shape as a whole, and is installed on the sea bottom 90 in a horizontal posture as shown in the figure. Reinforced concrete has a specific gravity of approximately 2.4 t/m ³ , can be manufactured simply and at a low cost, and has excellent durability. Therefore, it is most suitable as a material for caisson installed on the seabed with a base 2.

The base part 2 composed of the concrete caisson 21 has a polygonal shape or a round block shape in a plan view, and can be stably installed on the seabed surface by expanding the bottom surface. The block-shaped base part 2 is formed so that the central part is thicker than the outer peripheral part, and becomes the pedestal part 22 supporting the pillar part 1, and the outer peripheral part 23 is enlarged so that the installation area for the sea bottom 90 becomes larger. The base part 2 is set to have an outer diameter of, for example, 20 m to 30 m. The base part 2 in the figure is fixed to the seabed 90 via a pile member 24 penetrating the outer periphery. The base part 2 including the concrete caisson 21 is, for example, the thickness of the pedestal part 22 is set to several m, and the thickness of the outer peripheral part 23 is set to several tens of cm to several m. The base part 2 in the figure is fixed to the seabed by driving a plurality of foundation piles penetrating the outer periphery into the seabed.

As described above, the implantable offshore stand 9 can extend its life by making the base part 2 made of concrete. Therefore, by freely loading and unloading the pillar part 1 and the base part 2, the durability of the concrete base part 2 can be extended and reused, and only the metal pillar part 1 or the wind generator 30 with a shorter life can be replaced. The base part 2 can be effectively used and the cost can be reduced.

The above-mentioned fixed-bed offshore platform 9 is arranged in a self-standing posture by connecting the lower end of the pillar part 1 arranged from the sea bottom 90 to the sea surface to the base part 2 arranged on the sea floor 90, but the pillar part 1 is sometimes due to When the upper end near the sea surface or the wind generator 30 installed at the upper end is inclined from a vertical posture due to strong wind or waves such as a typhoon. At this time, if the lower end of the pillar portion 1 and the base portion 2 are firmly fixed, a large stress may be applied to the connecting portion with the base portion 2 due to the load received from the inclined pillar portion 1 and the connecting portion may be damaged. . In order to solve this problem, the implantable offshore platform 9 of the present invention connects the lower end of the pillar 1 to the base part 2 by separating the lower end of the pillar 1 through a connection structure 5 that allows the pillar 1 to swing. Hereinafter, the connection structure 5 of the support|pillar part and the base part 2 is demonstrated in detail.

(Link structure 5) The connection structure 5 shown in FIGS. 5 and 6 includes: a socket recess 51 formed at the lower opening of the lower end surface of the pillar portion 1 and the inner surface is curved; and a round-headed convex portion 52 from the base The upper surface of the part 2 is formed so that it protrudes, and the front-end|tip part is made into a spherical shape. The socket recess 51 is a recess formed at the lower end of the bottom end of the pillar 1, and the pillar 1 shown in the figure is provided with a plumb portion 3 including a concrete caisson 16 at the lower end, and the lower end surface of the plumb portion 3 is formed The socket recess 51 is provided in the shape of a central recess. The inner surface of the socket recessed part 51 is a curved surface in order to contact the spherical surface formed in the front end of the round-headed convex part 52 formed in the base part 2 surface-to-surface. The central portion of the socket recess 51 is preferably a curved surface with a radius of curvature R1 slightly larger than the radius of curvature R2 of the front end surface of the round-headed convex portion 52, and a tapered surface or lower than the curved surface Rotating parabolic shape. Thereby, the inner surface of the socket concave portion 51 is moved along the front end surface of the round head convex portion 52 in a contact state, and the pillar portion 1 can be shaken.

In the above connection structure 5, the rounded convex portion 52 guided to the socket concave portion 51 is in surface contact with the inner surface of the socket concave portion 51, and the inner surface of the socket concave portion 51 and the surface of the spherical convex portion 52 are changed. The contact position allows the pillar portion 1 to swing freely with respect to the base portion 2. In particular, according to this connection structure, the support column 1 can be allowed to swing in a 360-degree direction in a plan view with respect to the base part 2.

Furthermore, the connection structure 5 guides the round-headed convex portion 52 protruding from the upper surface of the base portion 2 to the socket concave portion 51 provided on the lower end surface of the pillar portion 1 and can be opposed to the socket concave portion 51 There is no accumulation of mud or foreign matter in the seawater at the contact part with the round-head convex part 52. The reason for this is that the socket recess 51 becomes a downward opening. Therefore, the contact portion between the socket recess 51 and the round head protrusion 52 can be kept in a clean state for a long time, and a good contact state can be maintained.

Furthermore, the connecting structure 5 shown in FIG. 6 is located inside the socket recess 51 and filled with a lubricant 53 having a smaller specific gravity than seawater. As the lubricant 53, liquid lubricating oil or semi-solid grease can be used. In this way, since the lubricant 53 filled in the socket recess 51 of the lower opening has a smaller specific gravity than seawater, it does not flow out of the socket recess 51 into the seawater, and remains in the state of remaining in the socket recess 51. Therefore, the frictional resistance between the socket concave portion 51 and the round-head convex portion 52 can be reduced for a long period of time and a good contact state can be maintained. In particular, as shown in FIG. 6, by making the radius of curvature R1 of the socket recess 51 greater than the radius of curvature R2 of the round-headed convex portion 52, the adjacent gap 54 is formed due to the difference in the radius of curvature in the vicinity of the surface contact area. Therefore, by the lubricant flowing into the adjacent gap 54, when the contact position between the inner surface of the socket recess 51 and the outer surface of the bulge 52 moves, the lubricant 53 is interposed between the contact surfaces. Reduce friction and achieve smooth contact. Therefore, it is possible to effectively prevent the deterioration of the contact portion between the socket concave portion 51 and the round head convex portion 52 and maintain a good contact state for a long time.

Furthermore, as shown by the dashed line in FIG. 6, the socket recess 51 may also be provided with an inflow groove 55 in the contact area with the round-headed convex portion 52 so that the lubricant 53 can flow into the inflow groove 55. This structure can also enable the lubricant 53 to effectively flow between the inner surface of the socket concave portion 51 and the outer surface of the round-headed convex portion 52 to achieve smooth contact. The inflow groove can also be arranged on the surface of the round head convex part.

Furthermore, the connection structure 5 composed of the socket recessed portion 51 formed at the lower end of the pillar portion 1 and the round-headed convex portion 52 formed on the base portion 2 may also have the structure shown in FIG. 7. The connection structure 5 shown in FIG. 7 is a structure in which the upper end surface 52a of the round convex portion 52 and the inner surface of the socket concave portion 51 are in contact with each other over a wider area. The inner surface shape of the socket recess 51 shown in FIG. 7 is hemispherical. The shape of the upper end surface 52a of the round convex portion 52 is set to a curved shape along the inner surface of the socket concave portion 51. The radius of curvature R2 of the upper end surface 52a of the round convex portion 52 is equal to or slightly smaller than the radius of curvature R1 of the inner surface of the socket recess 51. Thereby, it is supported in a state where the upper end surface 52A of the round-head convex portion 52 and the inner surface of the socket recess 51 are in contact with each other in a wider area. In addition, the round-headed convex portion 52 shown in the figure has a structure in which the upper end surface 52a facing the socket concave portion 51 is in contact with the inner surface of the socket concave portion 51, and the radius of curvature R3 of the outer peripheral portion 52b is smaller than the upper end surface 52a. The radius of curvature R2, thereby allowing the inner surface of the socket concave portion 51 to slide smoothly with respect to the upper end surface 52a of the round-headed convex portion 52.

According to the above connection structure 5, there is an advantage that the area supporting the load of the pillar portion 1 can be enlarged, and a large load can be suppressed locally on the contact portion of the round-headed convex portion 52 and the socket recessed portion 51. In particular, the area of the upper end surface 52a that is the contact surface of the round-headed convex portion 52 shown in FIG. 7 with the socket concave portion 51 is approximately the same as the area of the cross-sectional area of the main body portion 1A of the pillar portion 1, or slightly larger. Support the pillar 1 stably. However, the round-headed convex portion 52 may also have an area of the upper end surface 52a in contact with the socket concave portion 51 that is smaller than the cross-sectional area of the main body portion 1A of the pillar portion 1.

Furthermore, the connecting structure 5 shown in FIG. 7 is also located inside the socket recess 51 and filled with a lubricant 53 having a smaller specific gravity than seawater. The connection structure 5 in the figure enlarges the contact area between the round-headed convex portion 52 and the socket recessed portion 51. Therefore, in order to supply the lubricant 53 filled inside the socket recessed portion 51 to the entire contact surface, the round-headed convex portion 52 and the socket The contact area of the dimple 51 is provided with an inflow groove 55. The pillar portion 1 shown in FIG. 8 is attached to the inner surface of the socket recess 51 to form a plurality of inflow grooves 55 intersecting each other. The inflow groove 55 in the figure is provided in a plan view with a plurality of radial grooves 55a extending radially from the center of the socket recess 51 as a starting point, and a plurality of concentric annular grooves 55b, and the radial groove 55a and the ring The grooves 55b cross each other. Furthermore, between adjacent radial grooves 55a, sub-radial grooves 55c connecting a plurality of annular grooves are provided. The inflow groove 55 can efficiently supply the lubricant 53 to the entire contact surface by forming a plurality of grooves into a shape that crosses each other. The inflow groove 55 may be a groove width of several mm to several cm, and a depth of several mm to several cm. In this way, the structure in which the inflow groove 55 is provided in the contact area between the round head protrusion 52 and the socket recess 51 can effectively supply the lubricant 53 to the entire contact surface of the socket recess 51 and the round head protrusion 52, and achieve smooth contact .

The inflow groove 55 of the above shape has a feature that the lubricant 53 flowing into the radial groove 55a or the sub-radial groove 55c flows to the annular groove 55b, which can effectively treat the socket concave portion 51 and the round convex portion The entire contact surface of 52 is supplied with lubricant 53. However, the inflow groove is not limited to the above shapes. For example, it can be a matrix-like cross shape or a honeycomb shape, or a shape that extends radially from the center of the contact surface, or a shape that expands from the center of the contact surface in a spider's nest. . In addition, although the inflow groove 55 shown in the figure is provided on the inner surface of the socket recess 51, the inflow groove can also be provided on the surface of the round-headed convex portion 52, or on the inner surface of the socket recessed portion 51 and the round-headed convex portion 52. Both of the surface.

Furthermore, the connecting mechanism 5 shown in FIG. 7 connects the lower end of the pillar portion 1 and the base portion 2 via a plurality of connecting rope bodies 80. The pillar portion 1 is connected to the base portion 2 via a plurality of connecting cords 80 extending radially from the lower end, for example. The pillar portion 1 is provided with a plurality of connecting portions 81 protruding from the outer circumferential surface of the lower end portion at equal intervals along the outer circumferential circle. In the base part 2, a plurality of fixing parts 82 protruding from the base part 22 and a plurality of connecting parts 81 provided at the lower end of the pillar part 1 are opposed and arranged at equal intervals. The plurality of rope bodies 5 arranged radially from the pillar portion 1 are 3-16, preferably 4-8, so that the pillar 1 can be reliably held at the fixed position of the base portion 2. The above connecting mechanism 5 can allow the pillar portion 1 to swing relative to the base portion 2 and prevent the pillar portion 1 from rotating in a horizontal plane, and can prevent the socket recess 51 of the pillar portion 1 from falling off from the round convex portion 52 of the base portion 2. In particular, even during disasters such as an earthquake or a tsunami, the pillar 1 can be held at a fixed position.

The connecting rope body 80 may use wires such as steel cables, or chains and chains. The connecting cords 80 are provided with a length and strength that allow the support column 1 to swing, and can prevent the socket recess 51 of the support column 1 from falling off the round-headed projection 52 of the base member 2. Although the connecting rope body 80 shown in the figure has one end connected to the lower end of the pillar 1 and the other end connected to the base part 2, the other end of the connecting rope body may be fixed to the seabed via a fixing member such as an anchor.

(Other connection structure) Furthermore, the connecting structure 5 can also be the structure shown in FIG. 9 and FIG. 10. The connecting structure 5 shown in these figures includes: a columnar connecting convex portion 56 protruding downward from the lower end of the pillar portion 1; an upper opening insertion portion 57 formed on the upper surface of the base portion 2 for connecting convex portions Part 56 is inserted; and a rubber-like elastic body 58, which is interposed between the insertion part 57 and the connecting convex part 56. The pillar portion 1 shown in FIG. 9 is provided with a concrete caisson 16 at the lower end to form a plumb portion 3, and a connecting convex portion 56 protruding downward from the lower end 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 pillar portion 1. The plumb portion 3 also fills the steel pipe 56A with the concrete 15 filled in the steel pipe 10 forming the pillar portion 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 member 2, and connects the lower end of the pillar portion 1 to the base member 2. The base portion 2 shown in the figure is provided with a through hole as an insertion portion 57 in the center portion of the base portion 22. However, the insertion part can also be set as a recessed part with an upper opening.

The rubber-like elastic body 58 shown in FIGS. 9 and 10 is made into a cylindrical shape that can be inserted through the connecting convex portion 56. The cylindrical rubber-like elastic body 58 is interposed between the connecting convex portion 56 and the inserting portion 57 to suppress the relative movement of the connecting convex portion 56 and the inserting portion 57 and protect both the connecting convex portion 56 and the inserting portion 57. Furthermore, the rubber-like elastic body 58 shown in the figure is attached to one end of the cylindrical main body portion 58A, and a flange portion 58B protruding in the outer circumferential direction is integrally provided so that the flange portion 58B is interposed on the lower surface of the pillar portion 1 and Between the upper surface of the base part 2. The rubber-like elastic body 58 of the above shape is formed by molding elastic rubber into a cylindrical shape with a specific thickness to form a cylindrical portion 58A, and is integrally molded at one end to form a flange portion 58B. The above rubber-like elastic body 58 has a cylindrical shape as a whole, and the cylindrical portion 58A is interposed between the connecting convex portion 56 and the insertion portion 57, and the flange portion 58B provided at one end is interposed on the lower surface of the pillar portion 1. Between the upper surface of the base part 2 and the upper surface of the base part 2, the pillar part 1 can be rocked more stably relative to the base part 2 by this.

Here, the imbedded offshore platform 9 shown in FIG. 2 has the structure shown in FIG. 10, and the pillar portion 1 and the base portion 2 are connected via a rubber-like elastic body 58. The connecting structure 5 uses the connecting convex portion 56 as a shaft, and connects the pillar portion 1 to the insertion portion 57 of the base portion 2, and the elasticity of the rubber-like elastic body 58 allows the pillar portion 1 to swing with a simple structure.

Moreover, the connection structure 5 shown in FIG. 9 shows an example of the structure which supports the pillar part 1 with a large outer diameter of a lower end part. In the connecting structure 5 shown in the figure, the pillar portion 1 includes a connecting convex portion 56 at the center of the lower end surface, and the base portion 2 includes an insertion portion 57 at the center of the upper surface of the pedestal portion 22. Furthermore, the connecting structure 5 in FIG. 9 is between the outer peripheral portion of the lower end surface of the pillar portion 1 and the upper surface of the base portion 2, and a plurality of elastic bodies 59 are interposed therebetween. The elastic body 59 shown in the figure serves as a coil spring. However, rubber can also be used for the elastomer. The connecting structure 5 is positioned by separating the connecting convex portion 56 and the inserting portion 57 and connecting the central portion of the lower surface of the pillar portion 1 with a larger outer shape. The connecting convex portion 56 and the inserting portion 57 are protected by a cylindrical rubber-like elastic body 58 And the plurality of elastic bodies 9 arranged between the outer periphery of the lower surface of the pillar portion 1 and the upper surface of the base portion 2 increase the load resistance and allow the pillar portion 1 to swing. In particular, even if it is a pillar part 1 with a wide bottom area, it is possible to allow stable shaking with respect to the base part 2.

The connecting convex part 56 of FIG. 9 is cylindrical using a steel pipe 56A, but the connecting convex part may be formed in a polygonal column shape, and a cone shape, a pyramid shape, a truncated cone shape, and a truncated cone shape that taper toward the tip. In addition, the cylindrical rubber-like elastic body or the insertion portion into which the connecting protrusions of these shapes are inserted can also be formed in a shape along the outer shape of the connecting protrusion.

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

The rocking mechanism 60 includes: a cup portion 63 that fits into a concave portion 61 formed on the lower end surface of the pillar portion 1; a cap portion 64 that covers a convex portion 62 protruding from the upper surface of the base portion 2; and a plurality of elastic bodies 65, which is arranged between the inner surface of the cup portion 63 and the outer surface of the cap portion 64. The rocking mechanism 60 sets the outer shape of the cup portion 63 to fit into the shape and size of the recess 61 formed on the lower end surface of the pillar portion 1. In addition, the rocking mechanism 60 sets the inner shape of the cap portion 63 to a shape and size that can be inserted into the convex portion 62 formed on the base portion 2. The cup portion 63 and the cap portion 64 are preferably formed by processing a metal plate.

Furthermore, the rocking mechanism 60 provides a gap 66 with a specific 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 and the cup portion is connected through the elastic body 65. The inner surface of 63 and the outer surface of the cap. The cup portion 63 and the cap portion 64 shown in the figure are cylindrical in shape. The rocking mechanism 60 is configured as follows: in the gap 66 between the bottom surface of the cup portion 63 and the top surface of the cap portion 64, a plurality of elastic bodies 65 are arranged at equal intervals to absorb the load in the vertical direction, and support the pillar portion 1 The vertical load. In the gap 66 between the inner circumferential surface of the cup portion 63 and the outer circumferential surface of the cap portion 64, a plurality of elastic bodies 65 that absorb the horizontal load are arranged radially at equal intervals in a plan view. The elastic body 65 shown is a coil spring. The swing mechanism 60 interposes a plurality of elastic bodies 65 to move the cup portion 63 and the cap portion 64 relative to each other, and allows the pillar portion 1 to swing 360 degrees in a plan view with respect to the base portion 2.

In the shape of the rocking mechanism 60, the cup portion 63 at the lower end of the pillar 1 is arranged in a downwardly open posture, so the gap 66 formed between the cup portion 63 and the cap portion 64 can be made so that seawater does not penetrate Of space. Therefore, by setting the space as an air layer, the elastic body arranged in the gap can be prevented from contacting with seawater, and deterioration or corrosion can be effectively prevented. The shaking mechanism 60 shown in FIG. 11 is in which the gap 66 formed between the cup portion 63 and the cap portion 64 is filled with a lubricant 67 having a smaller specific gravity than seawater. The lubricant 67 can use the above-mentioned lubricating oil or grease. In this way, the lubricant 67 filled in the gap 66 will not flow out into the seawater and will cover the elastic body 65 for a long time and protect it from corrosion or deterioration. In particular, in a structure in which the elastic body 65 is a coil spring containing an elastic metal, the characteristics of effectively preventing the corrosion or deterioration of the metal and maintaining the elastic force for a long time can be realized.

The connection structure 5 shown in FIG. 11 has the concave portion 61 and the convex portion 62 in a cylindrical shape, and the cup portion 63 and the cap portion 64 of the oscillating mechanism 60 arranged therebetween are also cylindrical in shape. . The connection structure 5 shown in FIG. 13 has the outer shape of the concave portion 61 and the convex portion 62 in the shape of a truncated cone, and the outer shape of the cup portion 63 and the cap portion 64 of the rocking mechanism 60 arranged between them is made into a conical shape. Table shape. The rocking mechanism 60 is constructed as follows: in the gap 66 between the bottom surface of the cup portion 63 and the top surface of the cap portion 64, a plurality of elastic bodies 65 for absorbing the vertical load are arranged at equal intervals to support the vertical direction of the pillar portion 1. Load. In addition, the cap portion 64 has the outer circumferential surface as a tapered surface with a wide hem, and the inner circumferential surface of the cup portion 63 has a tapered surface that gradually widens downward, and is arranged on the opposite tapered surface. The pressing direction of the elastic body 65 is the normal direction of the tapered surface. Therefore, the elastic force of the elastic body 65 can effectively act on the force received by the pillar portion 1 that swings from the lateral direction and effectively absorb the load in the oblique direction.

The swing mechanism 60 shown in FIG. 13 has a plurality of elastic bodies 65 as rubber-like elastic bodies. Furthermore, the shaking mechanism 60 shown in FIG. 13 uses the gap 66 formed between the cup portion 63 and the cap portion 64 as the air layer 68. Thereby, the intrusion of seawater into the gap 66 is prevented, and the chronological deterioration of the elastic body 65 caused by the seawater is effectively prevented.

(Other connection structure 5) Furthermore, the connection structure 5 shown in FIG. 14 includes: a first rocking shaft 71, which becomes a rocking shaft 70 for rocking the lower end of the pillar portion 1 in the first direction (shown by arrow A in the figure); and a second rocking shaft The shaft 72, which is arranged to cross the first rocking shaft 71, becomes a rocking shaft 70 that swings the lower end of the pillar portion 1 in a second direction (shown by arrow A in the figure) that crosses the first direction. The connecting structure 5 connects the pillar portion 1 to the base portion 2 via two rocking shafts 70 intersecting each other, and can allow the pillar portion 1 to swing 360 degrees in a plan view with respect to the base portion 2.

The base part 2 shown in FIG. 14 includes a base part 25 fixed to the bottom of the sea 90 and a swing body 26 that is swingably connected to the base part 25 in the second direction via a second swing shaft 72. The pillar portion 1 is coupled to the swing body 26 to be freely swingable in the first direction via the first swing shaft 71. The pillar portion 1 in the figure is provided with a first rocking shaft 71 protruding in the diameter direction from the side surface of the lower end portion, and the first rocking shaft 71 is rotatably connected to the rocking body 26 via a first bearing 73. In addition, the swing body 70 includes a second swing shaft 72 protruding in a direction crossing the first swing shaft 71, and the second swing shaft 72 is rotatably connected to the base portion 25 via a second bearing 74. In the connecting structure 5 shown in the figure, the first rocking shaft 71 and the second rocking shaft 72 are arranged in a horizontal posture and in a direction orthogonal to each other, so that the pillar portion 1 can be smoothly rocked in a 360-degree direction with respect to the base portion 25.

The connection structure 5 shown in FIG. 14 is a structure in which the first rocking shaft 71 and the second rocking shaft 72 are arranged on the outer side of the pillar portion 1. This structure can simply and easily connect the first rocking shaft 71 and the second rocking shaft 72 to a specific position. However, although the connection mechanism is not shown in the figure, a concave portion with a downward opening may be provided on the lower surface of the pillar portion, and the inside of the concave portion is connected to the base portion via the first and second swing shafts. This structure is particularly suitable for the case where a pillar part with a larger outer diameter is connected to the base part via two rocking shafts. In addition, since the first and second rocking shafts can be arranged inside the recessed portion provided on the lower surface of the pillar portion, the first rocking shaft and the second rocking shaft can be configured so as not to be in contact with seawater. Suppress the deterioration of the oscillating shaft or bearing.

(Rope 17) Furthermore, the anchoring type offshore mount 9 shown in FIGS. 1 and 2 includes a plurality of rope bodies 17 for fixing the pillar portion 1 to the bottom of the sea 90. The rope body 17 is a wire such as a steel cable, or a chain, a chain, etc., and has the strength to stably maintain the pillar portion 1 when the pillar portion 1 is affected by strong winds or swelling waves due to typhoon or the like. A plurality of rope bodies 17 are radially stretched from the middle part of the pillar 1 and fixed to the sea bottom 90. One end of the rope body 17 is the middle part of the pillar part 1 and is fixed to the connecting part 18 of the main body part 1A arranged in the sea, and the other end is fixed to the seabed 90 through an anchor 19. The rope body 17 is connected between the pillar portion 1 and the anchor 19 to receive a specific tensile force, and is stretched in a specific tension determined by a fixed position determined by its length and anchor. The number of rope bodies 5 arranged radially from the pillar portion 1 is preferably 3 to 6, so that the frame can be stably held.

The above anchored offshore platform 9 is shown in FIG. 1, and is used as an offshore wind power generator 100 in a state where a wind generator 30 is installed at the upper end of the pillar 1, as shown in FIG. 2, at the upper end of the pillar 1. It is used as the offshore wind condition observation device 200 in the state where the wind condition observation machine 35 is installed.

(Wind generator 30) As shown in FIG. 1, the wind generator 30 includes: a windmill 31 that rotates under wind; a generator 32 that converts the kinetic energy of the rotating windmill 31 into electric energy; a nacelle 33 that houses the generator 32; and a tower 34 for The nacelle 33 is arranged at a specific height. The windmill 31 includes a plurality of blades 31A, and the plurality of blades 31A are fixed at equal intervals on a hub 31B provided in the center. The wind generator 30 fixes the base of the tower 34 to the upper end of the pillar 1 and is installed on the implanted offshore platform 9. The offshore wind power generator 100 shown in the figure is the base of the tower 34, and a platform 36 for operation is provided along the outer circumference of the upper end of the pillar 1.

The wind generator 30 shown in FIG. 1 is a downwind windmill 31. Furthermore, the wind turbine 30 fixes the nacelle 33 at a specific angle to the upper end of the tower 34, and in the state where the tower 34 extended from the pillar portion 1 is swayed to the downwind side, the rotation axis of the wind turbine 31 is horizontal direction. The wind power generator 30 is arranged in a manner in which the rotation axis of the windmill 31 is at a specific elevation angle with respect to the horizontal plane orthogonal to the axis of the tower 34 in the direction of the downwind. The offshore wind power generation device 100 uses the windmill 31 of the wind turbine 30 as a downwind type and arranges the rotation axis of the windmill 31 at a specific elevation angle. Therefore, when the pillar 1 is swayed to the downwind side, the power generation efficiency can be stabilized without lowering the power generation efficiency. Ground power generation.

(Wind Observer 35) The anchoring type offshore platform 9 shown in FIG. 2 is provided with a platform part 36 in a horizontal posture on the upper end of the pillar part 1 arranged in such a way that the upper end part protrudes to the sea, and a wind condition observer 35 is arranged on the platform part 36. Various wind condition observers 35 for observing wind conditions for wind power generation are wind vane, wind meter, anemometer, etc., as shown in FIG. 2. These wind condition observation machines 35 detect the wind direction, air volume, and wind speed at the observation location to observe the wind condition. In particular, the current situation is that the wind condition data measured by the floating-body wind condition observation device is not processed as formal wind condition data. Therefore, reliable wind condition measurement can be realized by using such a bed-mounted offshore stand 9.

Furthermore, in addition to the wind power generator 30 or the wind condition observation machine 35, various monitoring devices or various observation devices can also be installed on the implanted offshore platform 9. Examples of such devices include anti-bird strike radars, surveillance cameras, and weather radars for weather observation. [Industrial availability]

The mounting-type offshore platform of the present invention can be preferably used as a platform for a wind condition observation machine supporting offshore wind turbines or measuring meteorological data such as wind conditions on the sea.

1: Pillar 1A: Main unit 1B: protrusion 1C: Thick tube 2: base part 3: Plumbum Department 4: Floating body 5: Link structure 9: Implantation type offshore platform 10: Steel pipe 11: Flange 12: Connecting tool 13: separation wall 13A: Clamping board 13B: Split plate 14: Hollow part 14A: Zoning Room 15: Concrete 16: Concrete Caisson 17: Rope body 18: Connection part 19: Anchor 21: Concrete caisson 22: Pedestal 23: Peripheral 24: Foundation pile components 25: Abutment 26: Shake body 30: Wind turbine 31: Windmill 31A: Blade 31B: Wheel hub 32: Generator 33: Cabin 34: Tower 35: Wind Observer 36: Platform Department 40: Sub-buoy 41: Center hole 42: fixed component 43: pump 44: Ballast water 51: socket recess 52: round head convex 52a: Upper end face 52b: Peripheral 53: Lubricant 54: Adjacent gap 55: Inflow slot 55a: radial groove 55b: ring groove 55c: Sub-radial groove 56: connecting convex part 56A: Steel pipe 57: Insertion part 58: Rubber-like elastomer 58A: Tube 58B: Flange 59: Elastomer 60: Shake mechanism 61: recess 62: Convex 63: Cup 64: cap part 65: elastomer 66: gap 67: Lubricant 68: Air layer 70: air layer 71: The first shaking axis 72: second shaking axis 73: The first bearing 74: The second bearing 80: Connect the rope body 81: Connection 82: fixed part 90: Undersea 100: Offshore wind power plant 200: Offshore wind observation device A: Arrow B: Arrow F: Floating G: Center of gravity P: Buoyancy R1: radius of curvature R2: radius of curvature R3: radius of curvature W: gravity

Fig. 1 is a schematic cross-sectional view of an offshore wind power generation device according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view showing an offshore wind observation device according to an embodiment of the present invention. Fig. 3 is an enlarged cross-sectional view of the floating body part of the embedded offshore platform of the offshore wind power generation device shown in Fig. 1. Fig. 4 is an enlarged cross-sectional view showing an example of the sub-floating body part. Fig. 5 is a sub-anatomical view showing an example of the connection structure. Fig. 6 is an enlarged cross-sectional view of a part of the connecting structure shown in Fig. 5. Fig. 7 is a partially enlarged cross-sectional view showing another example of the connection structure. Fig. 8 is a bottom view of the socket recess shown in Fig. 7; Fig. 9 is an enlarged cross-sectional view showing another example of the connection structure. Fig. 10 is an enlarged cross-sectional view showing another example of the connection structure. Fig. 11 is an anatomical view showing another example of the connection structure. Fig. 12 is an enlarged cross-sectional view of the connection structure shown in Fig. 11. Fig. 13 is an enlarged cross-sectional view showing another example of the connection structure. Fig. 14 is a perspective view showing another example of the connection structure.

1: Pillar

1A: Main unit

1B: protrusion

1C: Thick tube

2: base part

3: Plumbum Department

4: Floating body

5: Link structure

9: Implantation type offshore platform

17: Rope body

19: Anchor

30: Wind turbine

31: Windmill

31A: Blade

31B: Wheel hub

32: Generator

33: Cabin

34: Tower

36: Platform Department

90: Undersea

100: Offshore wind power plant

F: Floating

G: Center of gravity

P: Buoyancy

W: gravity

Claims (19)

An imbedded offshore platform, which is characterized in that it is a wind condition observation machine used for wind power generators for wind power generation or wind condition data measurement for wind power generation, set on the offshore platform, and includes: The pillar part, the lower end of which is arranged on the bottom of the sea, and the upper end of which protrudes to the sea extends upward and downward, and the above-mentioned wind power generator or the above-mentioned wind condition observation machine is arranged at the upper end; and The base part is arranged on the seabed for the connection of the lower end of the above-mentioned pillar part; and The above pillars Contains a hollow floating body part, and has a plumb part at the lower end that allows the pillar part to settle, The buoyancy center of the buoyancy acting on the floating body portion is arranged above the center of gravity of the plumb weight portion, and the pillar portion is maintained in a vertical posture, and then The lower end of the pillar portion is connected to the base portion through a connection structure that allows the pillar portion to swing. Such as the bed-type offshore platform of claim 1, where The above link structure includes: The socket recess is formed at the lower opening of the lower end surface of the pillar portion, and the inner surface is set in a curved surface shape; and A round-headed convex portion protruding from the upper surface of the above-mentioned base portion, and the front end portion is set in a spherical shape; and The round-headed convex portion guided to the socket concave portion is brought into surface contact with the inner surface of the socket concave portion, and the pillar portion is allowed to swing 360 degrees in a plan view with respect to the base portion. Such as the bed-type offshore platform of claim 2, where The above connection structure Fill the inner side of the socket recess with a lubricant whose specific gravity is smaller than that of seawater. Such as the bed-type offshore platform of claim 3, which further The contact area between the socket concave portion and the round head convex portion includes an inflow groove for allowing the lubricant to flow in. Such as the built-in offshore platform of any one of claims 2 to 4, where The above connection structure includes A plurality of connecting rope bodies connecting the lower end of the pillar part and the base part. Such as the bed-type offshore platform of claim 1, where The above link structure includes: Columnar or cone-shaped connecting convex part, which protrudes downward from the lower end of the above-mentioned pillar part; An upper opening inserting portion is formed on the upper surface of the base portion for insertion of the connecting convex portion; and The rubber-like elastic body is interposed between the insertion portion and the coupling convex portion. Such as the bed-type offshore platform of claim 6, where The rubber-like elastic system can be inserted into the cylindrical shape of the connecting convex portion, and a flange portion is integrally provided at one end, The flange portion is interposed between the lower surface of the pillar portion and the upper surface of the base portion. Such as claim 6 or 7 of the built-in offshore platform, of which The pillar portion includes the connecting convex portion at the center of the lower end surface, and the center portion of the base portion at the upper surface includes the insertion portion, A plurality of elastic bodies are interposed between the outer peripheral portion of the lower end surface of the pillar portion and the upper surface of the base portion. Such as the bed-type offshore platform of claim 1, where The above link structure includes: A concave portion with a lower opening, which is formed on the lower end surface of the above-mentioned pillar portion; A convex portion that protrudes from the upper surface of the base portion and is guided to the concave portion; and A rocking mechanism, which is disposed between the concave portion and the convex portion; and The above-mentioned shaking mechanism includes: The cup part is fitted into the above-mentioned recessed part formed on the lower end surface of the above-mentioned pillar part; The cap part, which covers the convex part protruding from the upper surface of the base part; and A plurality of elastic bodies are arranged between the inner surface of the cup part and the outer surface of the cap part; and The plurality of elastic bodies are interposed to move the cup portion and the cap portion relative to each other, and allow the pillar portion to swing 360 degrees in a plan view with respect to the base portion. Such as the bed-type offshore platform of claim 9, where The shaking mechanism is provided with a gap between the inner surface of the cup portion and the outer surface of the cap portion, and The above gap is used as an air layer. Such as the bed-type offshore platform of claim 9, where The shaking mechanism is provided with a gap between the inner surface of the cup portion and the outer surface of the cap portion, Fill the above gap with a lubricant whose specific gravity is less than that of sea water. Such as any one of claims 9 to 11 of the built-in offshore platform, in which The plural elastic bodies are rubber or springs. Such as the bed-type offshore platform of claim 1, where The above link structure includes: The first rocking shaft, which becomes a rocking shaft for rocking the lower end of the pillar portion in the first direction; and A second rocking shaft, which is arranged to cross the first rocking shaft, and becomes a rocking shaft for rocking the lower end of the pillar portion in a second direction that intersects the first direction; and The pillar portion is allowed to swing in a 360-degree direction in a plan view with respect to the base portion. Such as the bed-type offshore platform of claim 13, where The above base contains: The abutment part fixed on the seabed; and A rocking body, which is connected to the base portion in a swing freely in a second direction via the second rocking shaft; and The above pillars The first rocking shaft is interposed and connected to the rocking body to be freely rocking in a first direction, The first rocking shaft and the second rocking shaft are arranged in directions orthogonal to each other. Such as the bed-mounted offshore platform of any one of claims 1 to 14, where In the pillar portion, a portion arranged under the sea surface has a larger outer diameter than other portions to provide a thick cylindrical portion, and the thick cylindrical portion is hollow as a part of the floating body portion. Such as the built-in offshore platform of any one of claims 1 to 14, which further includes The cylindrical and hollow sub-floating body part that is detachably connected to the above-mentioned pillar part, and The sub-floating body part is arranged below the sea surface along the pillar part inserted in the center. An offshore wind power generation device, which is an offshore wind power generation device including a built-in offshore platform as claimed in any one of claims 1 to 16, and includes: The above-mentioned implantable offshore platform; and A wind generator installed at the upper end of the above-mentioned pillar. Such as the offshore wind power generation device of claim 17, wherein The above-mentioned wind power generator includes a downwind windmill. An observation device for offshore wind conditions, characterized in that it is an offshore wind observation device including the built-in offshore platform according to any one of claims 1 to 16, and includes: The above-mentioned implantable offshore platform; and A wind condition observation machine, which is arranged at the upper end of the above-mentioned pillar part; and The pillar portion includes a platform portion at an upper end portion, and the wind condition observer is provided on the platform portion.

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