KR20230069739A - Combined mooring device for the maintance of effective mooring force, creation of a relaxation area and monitoring of mooring lines of floating structure - Google Patents

Abstract

The present invention provides a complex mooring device for maintaining the effective mooring force of a floating solar power generation structure, creating a relaxation section and monitoring, wherein the complex mooring device has the relaxation section in which two buoyant bodies are connected to a mooring line, installs a weight that acts in the direction of gravity in the relaxation section, and effectively continues relaxation by using expansion and contraction of the range of the relaxation section according to the water level difference, thus preventing excessive load from being exerted on the mooring line. The complex mooring device for maintaining the effective mooring force of a floating solar power generation structure, creating a relaxation section and monitoring according to the present invention, in maintaining the position of the floating solar power generation structure on the water using the mooring line connected to an anchor, has the relaxation section in a certain section of the mooring line that can loosely sag in the water. In the lower end of the relaxation section, a lower auxiliary buoyancy body floating in the water is connected and installed, and in the upper end of the relaxation section, an upper auxiliary buoyancy body that floats on the water surface with a relatively greater buoyancy than the lower auxiliary buoyancy body is connected and installed. Also included is a relaxation section weight that is located between the lower auxiliary buoyancy body and the upper auxiliary buoyancy body and is installed and connected to the relaxation section to expand and contract the range of the relaxation section according to the water level difference by applying a load in the direction of gravity.

Description

Combined mooring device for the maintenance of effective mooring force, creation of a relaxation area and monitoring of mooring lines of floating structure}

The present invention relates to a mooring device for maintaining the position of a floating photovoltaic structure on a water surface. In particular, a relaxation section in which two buoyant bodies are connected is provided, and a weight acting in the direction of gravity is installed in the relaxation section to relax according to the water level difference. Complex mooring device for maintaining the effective mooring force of a floating photovoltaic power generation structure and creating and monitoring a relaxation section to prevent excessive load on the mooring line by effectively continuing the relaxation using the expansion and contraction of the section range It is about.

Floating photovoltaic power generation is a method of building a solar power plant on the water surface, and the power plant is located on the water surface and floats. Moorings are installed to keep these floating power plants in position on the water surface. There are various mooring methods, but the relaxed mooring method is mainly applied in floating photovoltaic power generation. The loose mooring method is a method in which an anchor is installed on the seabed and the structure is fixed by connecting the anchor to the floating structure. In the relaxed mooring method, when the water level rises, the structure is constrained by the mooring line, so part of the structure may be submerged, local damage occurs at the mooring line connection, and excessive load is applied to the mooring line, resulting in collapse of the mooring system. can lead

In floating photovoltaic power generation, the load in the gravitational direction due to external force is transferred to the water through the buoyancy body, but all horizontal loads are concentrated in the mooring system, so the mooring lines and mooring connections are most frequently damaged. Since mooring is difficult to construct precisely, excessive load may be concentrated on some mooring lines. Therefore, it is required to create an appropriate relaxation section capable of distributing the load according to the water level rise. In addition, when the water level decreases, the mooring force acting on the mooring line is lost, causing the structure to drift, and there is a concern about destruction due to collision with nearby structures during drifting, so a solution to this is required.

Until now, in floating structures, it is not a big problem if a certain displacement according to the drop in water level is allowed.

In general, mooring in floating photovoltaic power generation is important to create an appropriate relaxation section according to the rise in the water level and to maintain the effective tensile force of the mooring line according to the decrease in the water level. In order to create a relaxation section, a so-called “elastic mooring” method composed of springs or rubber materials has been applied to mooring lines. The elastic mooring method is difficult to use for a long time due to durability such as corrosion in a seawater salty environment, and it is difficult to trust the load resistance performance because the mooring line becomes discontinuous. When the water level difference is large, since the horizontal displacement of the structure due to the water level difference must be accommodated, an excessive elastic device is required, resulting in a lack of economic feasibility, and it is difficult to secure safety due to the discontinuity of the load transmission structure. Although the elastic device is created for the relaxation section, there is a high possibility of malfunction due to the attachment of marine fouling organisms (barnacles, etc.) in the seawater salt sea space, so there is a risk of collapse of the power plant. The elastic mooring method using mechanical devices such as springs in the underwater state has concerns about malfunction due to attachment of marine organisms and corrosion, and it is difficult to secure long-term durability.

Therefore, mooring in floating photovoltaic power generation is required to create an appropriate relaxation section according to the rise in water level and to maintain the effective tensile force of the mooring line according to the decrease in water level.

As a background technology of the present invention, Korean Patent Publication No. 10-2020-0031789 proposes a 'mooring device'. This is to stably maintain the position of the power generation facility installed on the water and minimize the influence of external force, the buoyancy body connected to the power generation facility, the first weight portion disposed directly below the buoyancy body, and the It is formed of a second weight part and wire rope or chain type connection lines spaced apart from the first weight part, one end is coupled to the first weight part, and the other end is coupled to the buoyancy body and sliding movement Then, a connection portion coupled to the second weight portion is included, and the weight of the first weight portion is configured to be relatively lower than the weight of the second weight portion or the buoyancy of the buoyancy body. However, since the background art does not have a structure in which the mooring device is connected to the anchor, the power generation facility may drift when strong winds or typhoons occur. In addition, there is a problem that the drifting position cannot be monitored.

As another technology that is the background of the present invention, Korea Patent Registration No. 10-1996033 proposes a 'water level interlocking type floating photovoltaic mooring device'. This is to prevent the mooring line from being exposed to the upper part of the water surface so that the mooring line can be prevented from being oxidized, while exposing the photovoltaic facility to the upper part of the water level in conjunction with the change in water level and supporting it so that it does not deviate from the installation area or rotate. However, since the above background art does not have a structure in which the mooring line is connected to the anchor, the photovoltaic facility may drift when a strong wind or typhoon occurs, and there is a problem in that the drifting position cannot be monitored.

Korean Patent Publication No. 10-2020-0031789 Korea Patent Registration No. 10-1996033

The present invention puts a relaxation section in which two buoyant bodies are connected to a mooring line, installs a weight that acts in the direction of gravity in the relaxation section, and effectively continues relaxation by using the expansion and contraction of the range of the relaxation section according to the water level difference. The purpose is to provide a complex mooring device for maintaining the effective mooring force of a floating photovoltaic power generation structure and creating and monitoring a relaxation section to prevent excessive load on the line.

The complex mooring device for maintaining the effective mooring force of the floating photovoltaic power generation structure and creating and monitoring the relaxation section according to the present invention is a mooring line for maintaining the position of the floating photovoltaic power generation structure on the water using a mooring line connected to an anchor. , In a certain section of the mooring line, a relaxation section that can be loosely sagged in the water is placed, and a lower auxiliary buoyancy body floating in the water is connected to the lower end of the relaxation section, and at the upper end of the relaxation section, buoyancy is relatively higher than that of the lower auxiliary buoyancy body. The upper auxiliary buoyancy body floating on the water surface is connected and installed, and it is located between the lower auxiliary buoyancy body and the upper auxiliary buoyancy body and is connected to the relaxation section at the same time, so that the load acts in the direction of gravity and the range of the relaxation section according to the water level difference It is characterized in that a relaxation section weight for expanding and contracting is included.

In addition, the mooring line is divided into a chain section connected to the anchor, a synthetic rope section, a relaxation section, and a structure connection section, and the chain section is to minimize damage due to friction, abrasion, yielding, and fatigue with the anchor connection section and the anchor. It is composed of metal ropes and chains such as STS, the synthetic rope section is composed of synthetic rope with excellent corrosion resistance to minimize UV influence, the relaxation section is composed of synthetic rope to respond to yield and fatigue loads, and the structure connection section is composed of synthetic rope It is characterized in that it is composed of highly corrosion-resistant metal wire such as STS, which resists direct loads and has excellent durability against UV exposure.

In addition, the upper auxiliary buoyancy body further includes a solar cell that generates electricity from the sun for monitoring the mooring line, a storage battery that charges electricity from the solar cell, and a displacement sensor that is driven from the battery and measures the position of the upper auxiliary buoyancy body. to be characterized

In addition, the lower and upper auxiliary buoyancy bodies are fastened to the T-shaped branch connector connected to the mooring line, the buoyancy body rod whose one end is screwed to the T-shaped branch connector, and the other end of the buoyancy body rod to penetrate the lower and upper auxiliary buoyancy bodies, respectively. It is characterized in that it is installed by a pre-screw bolt, a fixing nut fastened to the pre-screw bolt and fixing the lower and upper auxiliary buoyancy bodies to the corresponding pre-screw bolt.

According to the composite mooring device for maintaining the effective mooring force of the floating photovoltaic power generation structure and creating and monitoring the relaxation section of the present invention, a relaxation section in which two auxiliary buoyancy bodies are connected is placed on the mooring line, and the weight acting in the direction of gravity in the relaxation section It is possible to prevent an excessive load from being loaded on the mooring line by installing a weight and effectively continuing the relaxation by using the expansion and contraction of the range of the relaxation section according to the water level difference.

In addition, by measuring the displacement position of the upper auxiliary buoyancy body floating on the water, it is possible to quickly recover the damaged mooring line by discovering it at an early stage.

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is limited to those described in the accompanying drawings. It should not be construed as limiting.
1 is an installation state diagram of a complex mooring line of a floating photovoltaic power generation structure according to an embodiment of the present invention.
Figure 2 is a partial side view of Figure 1;
3 is an installation state diagram of upper and lower auxiliary buoyancy bodies applied to FIG. 1;
Figure 4 is a use state diagram showing the degree of relaxation according to the water level of the complex mooring device of the floating photovoltaic power generation structure according to an embodiment of the present invention.
5 is a connection state diagram and an exploded view of the upper auxiliary buoyancy body applied to the present invention.
6 is a perspective view showing a floating photovoltaic power generation complex by applying the complex mooring line of FIG. 1;

Below, the present invention will be described in detail with reference to the embodiments presented in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The present invention provides a mooring device for fixing a floating photovoltaic structure 10 on a water surface using a mooring line 30 connected to an anchor 20 as shown in FIG. 1 . In particular, in the present invention, a certain section of the mooring line 30 is provided with a relaxation section 303 that can be loosely drooped in the water. The relaxation section 303 is laid loosely in the water, so that the relaxation range is expanded when the water level difference is large and the relaxation range is reduced when the water level difference is small, thereby avoiding concentrated loads at the mooring line and the mooring line connection. Yield and fatigue failure can be prevented in advance. The floating photovoltaic power generation structure 10 includes a photovoltaic module 12, a frame 14 supporting the photovoltaic module 12, and a floating body 16 for floating the floating photovoltaic power generation structure 10 on the water. includes

As shown in FIG. 2, the lower auxiliary buoyancy body 310 floating in the water is connected to the lower end of the relaxation section 303, and the upper end of the relaxation section 303 receives relatively greater buoyancy than the lower auxiliary buoyancy body 310. The upper auxiliary buoyancy body 320 is connected and installed. Therefore, the upper auxiliary buoyancy body 320 floats on the surface of the water and the lower auxiliary buoyancy body 310 floats below the surface of the water.

Here, the lower auxiliary buoyancy body 310 and the upper auxiliary buoyancy body 320 have the same configuration, for example, so that the upper auxiliary buoyancy body 320 generates a large buoyancy, and is relatively bulky. The lower and upper auxiliary buoyancy bodies 310 and 320 are, for example, a T-shaped branch connector 201 connected to the mooring line 20 as shown in FIG. 3, and a buoyancy body rod 202 having one end screwed to the T-shaped branch connector 201 , The pre-screw bolt 203 that is fastened to the other end of the buoyancy body rod 202 and penetrates the lower and upper auxiliary buoyancy bodies 310 and 320, respectively, and the pre-screw bolt 203 that is fastened to the lower and upper auxiliary buoyancy bodies 310 and 320 ) can be installed by a fixing nut 204 fixing the corresponding pre-thread bolt 203. At this time, the buoyancy body rod 202 is connected to the upper auxiliary buoyancy body 320 relatively shorter than the lower auxiliary buoyancy body 310.

A relaxation section weight 330 is connected to and installed in the relaxation section 303 . The relaxation section weight 330 may be positioned between the lower auxiliary buoyancy body 310 and the upper auxiliary buoyancy body 320 . For example, the relaxation section weight 330 may be located at the center of the relaxation section 303 . The relaxation section weight 330 has a specific gravity greater than that of water and applies a load in the direction of gravity. Therefore, as shown in FIG. 4, when the highest water level (H _max ) is formed where the floating photovoltaic structure 10 is floating, the maximum relaxation range (S1) is generated in the relaxation section 303, and the lowest water level (H _min ) is achieved, a minimum relaxation range S2 smaller than the maximum relaxation range S1 occurs in the relaxation period 303 .

Therefore, the mooring line 30 maintains the position of the floating photovoltaic power generation structure 10 while maintaining relaxation within the range allowed by the maximum relaxation range S1 and the minimum relaxation range S2 of the relaxation section 303. keep

As such, when the water level difference increases, the upper auxiliary buoyancy body 320 floats at a high position along the water surface, and when the water level difference decreases, the upper auxiliary buoyancy body 320 floats at a low position along the water surface while the relaxation section 303 relaxes. Since the connection part of the mooring line 30 is maintained, no concentrated load acts on the connection part of the mooring line 30, so that yield and fatigue do not occur at the connection part, and there is no fear of destruction due to this.

Here, the mooring line 30 may be divided into a chain section 301 connected to the anchor 20, a synthetic rope section 302, a loosening section 303, and a structure connection section 304, as shown in FIG. The chain section 301 is preferably composed of a metal rope and chain such as STS (stainless steel) in order to minimize damage due to friction, abrasion, yielding, and fatigue between the anchor connection portion and the anchor 20. The synthetic rope section 302 is preferably composed of a synthetic rope with excellent corrosion resistance so that UV influence is minimized. The relaxation section 303 is preferably composed of a synthetic rope to cope with the fatigue load. The structure connecting section 304 is preferably composed of highly corrosion-resistant metal wire such as STS, which resists direct load and has excellent durability against UV exposure.

On the other hand, when the floating photovoltaic power generation complex 1000 is created as shown in FIG. 6 by applying the mooring line of the present invention, since there are a number of mooring lines, a maintenance system for early detection of damaged moorings and restoration of damage need to build

Of course, the relaxation mooring method using the auxiliary buoyancy body as in the present invention uses a plurality of auxiliary buoyancy bodies, and the upper auxiliary buoyancy body 320 is always present on the water surface, so the breakage of the mooring line can be detected with the naked eye. There is also That is, when the mooring line is damaged, the upper auxiliary buoyancy body 320 present on the water surface drifts and changes its position, so it is possible to determine whether the mooring line is damaged or not from the position of the upper auxiliary buoyancy body 320.

However, since the size of recent floating photovoltaic power generation structures is increasing, it is difficult to judge with the naked eye. As a method for monitoring, the present invention supplies electricity from the sun to the upper auxiliary buoyancy body 320 for monitoring the mooring line as shown in FIG. A solar cell 331 that generates electricity, a storage battery 332 that charges electricity from the solar cell 331, and a displacement sensor 333 driven by the storage battery 332 to measure the position of the upper auxiliary buoyancy body 332 are included. can be configured. Of course, the upper auxiliary buoyancy body 320 further includes a transmission module to transmit a measurement signal to a remote monitoring room.

At this time, the monitoring room where the monitoring is performed receives the displacement measurement signal measured by the displacement sensor 333 from the transmission module and measures the displacement position of the upper auxiliary buoyancy body 332 to quickly detect the damaged mooring line and quickly recover it. can

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and variations without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by these variations and modifications, but is limited only by the claims appended below.

30: mooring line
301: chain section
302: synthetic rope section
303: relaxation section
304: structure connection section
310: lower auxiliary buoyancy body
320: upper auxiliary buoyancy body
330: relaxation section weight

Claims (4)

In the mooring line for maintaining the position of the floating photovoltaic power generation structure 10 on the water using the mooring line 30 connected to the anchor 20,
In a certain section of the mooring line 30, a relaxation section 303 that can be loosely drooped in water is provided, and a lower auxiliary buoyancy body 310 floating in the water is connected and installed at the lower end of the relaxation section 303, and the relaxation section At the upper end of the 303, an upper auxiliary buoyancy body 320 floating on the surface of the water by receiving a relatively greater buoyancy than the lower auxiliary buoyancy body 310 is connected and installed, and the lower auxiliary buoyancy body 310 and the upper auxiliary buoyancy body 320 ) and at the same time connected to the relaxation section 303, the load acts in the direction of gravity to expand and contract the range of the relaxation section according to the water level difference. Characterized in that the relaxation section weight 330 is included Complex mooring device for maintaining the effective mooring force of a floating photovoltaic power generation structure and creating and monitoring a relaxation section. According to claim 1,
The mooring line 30 is divided into a chain section 301 connected to the anchor 20, a synthetic rope section 302, a loosening section 303 and a structure connection section 304,
The chain section 301 is composed of metal ropes and chains such as STS to minimize damage due to friction, abrasion, yielding, and fatigue between the anchor connection and the anchor 20, and the synthetic rope section 302 minimizes UV influence. It is composed of synthetic rope with excellent corrosion resistance as much as possible, the relaxation section 303 is composed of synthetic rope to respond to yield and fatigue loads, and the structure connection section 304 resists direct loads and is durable to UV exposure. A composite mooring device for maintaining the effective mooring force of a floating photovoltaic power generation structure and creating and monitoring a relaxation section, characterized by being composed of highly corrosion-resistant metal wires such as excellent STS. According to claim 1,
The upper auxiliary buoyancy body 320 includes a solar cell 331 that generates electricity from the sun for monitoring the mooring line, a storage battery 332 that charges electricity from the solar cell 331, and a storage battery 332 driven by the upper auxiliary buoyancy body 320. A complex mooring device for maintaining an effective mooring force and creating and monitoring a relaxation section of a floating photovoltaic power generation structure, characterized in that it further comprises a displacement sensor 333 for measuring the position of the buoyancy body 332. According to claim 1,
The lower and upper auxiliary buoyancy bodies 310 and 320 include a T-shaped branch connector 201 connected to the mooring line 20, a buoyancy body rod 202 having one end screwed to the T-shaped branch connector 201, and a buoyancy body rod ( 202) is fastened to the lower and upper auxiliary buoyancy bodies 310 and 320, respectively, and the pre-screw bolt 203, which is fastened to the pre-screw bolt 203, connects the lower and upper auxiliary buoyancy bodies 310 and 320 to the corresponding full-screw A composite mooring device for maintaining the effective mooring force of a floating photovoltaic structure and creating and monitoring a relaxation section, characterized in that it is installed by a fixing nut 204 fixed to a bolt 203.

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