JPS60128089A - Mooring method of buoyant body - Google Patents

Abstract

PURPOSE:To moor a buoyant body sufficiently to cope with difference in water level by providing pulleys on land parts in water on the both sides of a buoyant body which is buoyantly provided over the water surface of a river, a dam, etc., fastening the both ends of a mooring cable, which is put around said pulley at its middle part, to said buoyant body, and providing a medium buoy on said mooring cable. CONSTITUTION:In order to moor a barge, on which a solar generator, etc. is installed, in position on the water surface of a dam, pulleys 3 are installed on land parts 5 in water on the both sides of a buoyant body 2, i.e., the barge, etc. to be buoyantly installed, through anchors 4. The both ends of a mooring cable 6, which is put around the pulley 3 at its middle part, are connected to the buoyant body 2. And, a medium buoy 7 is installed on one side of the mooring cable 6. Thereby, the mooring cables 6 can be always held with tension even if difference in water level takes place, to secure sufficient mooring for the buoyant body.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to water surfaces near land such as dams and rivers,
Or it relates to a method of mooring a floating body in a place where the bottom surface changes drastically.

[Prior art]

For example, when a birch or the like is floated on the water surface of a dam and a device such as a solar power generation device is installed on this floating body, this device and various devices installed on land are connected using cables, etc. This floating body must be kept in a fixed position for safety reasons.

However, depending on the water usage conditions of the dam, there are places where the water level fluctuates by 30 to 40 meters or more even under normal circumstances, so in order to moor the floating body at a fixed position, the mooring cables must be adjusted to the fluctuations in water level. It is necessary to wind it up and unwind it accordingly.

Thus, when mooring a floating body under conditions where the water surface fluctuates significantly, a special mooring device is required.

However, there are almost no mooring devices for floating bodies that have been used for this type of application in the past, and if we were forced to choose an auto-tension winch, this winch is driven using an electric motor or hydraulic motor, so Inevitably, power such as electricity or an internal combustion engine is required.

Generally, dams are constructed deep in the mountains, and there are often no wiring facilities, but the auto-tension winch needs to be operated at all times, so supplying power to this device is a problem. However, there were problems in terms of equipment installation and maintenance.

Furthermore, there is an example of this type of mooring method in which one side is fixed and the other side is a free rope using pulleys and weights. This is corrected by the mooring tower provided, but the larger the water level difference, the larger the scale of the mooring tower, which increases costs.

Furthermore, the above method has a problem in that the floating body shifts by the horizontal length of the cable length corrected by the mooring tower when the water level changes.

[Purpose of the invention]

Therefore, the present invention was made to solve the above-mentioned conventional problems, and by using a combination of a pulley and a buoyant body in a method of mooring a floating body, the horizontal external force applied to the floating body is absorbed by the vertical force of the buoyant body. The object of the present invention is to provide a mooring device for a floating body that can always be fixed at a predetermined position by counteracting the force with a horizontal component and has a simple structure.

[Structure of the invention]

That is, in the method of mooring a floating body of the present invention, pulleys are attached to underwater ridges on both sides of a floating body floating on the water surface, and both ends of a mooring cable wound around the pulleys are attached at an approximately intermediate portion. The floating body is connected to both sides of the floating body, and a buoyant body is attached to each of the mooring cables, so that the floating body is always fixed at a predetermined position.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First, the drawing is a schematic diagram of a mooring device in an embodiment of the present invention. A pulley 3 is attached to the crest 5 with an anchor 4, and both ends of a mooring cable 6 having a certain length, which is wound around the pulley 6 at the middle part thereof, are connected to both sides of the floating body 2. There is.

Next, the left and right mooring cables 6 are wound around the pulleys and buoyant bodies 7 are attached to the slightly upper positions of the suspended parts, so that no matter what height the floating body 2 is, the mooring cables 6 The total length of is constant.

That is, the floating body 2 is located at the position indicated by the solid line at HWL, which indicates the high water level in the figure, and is located at the position indicated by the broken line 2 at the low water level indicated by LWL.
At this time, even if the mooring rope 6 on one side turns into sludge due to horizontal forces such as wind and waves, the floating body 2 will descend to the position indicated by 70F due to the horizontal component of the vertical force indicated by the buoyant body 70F. acts to always maintain a fixed position.

Note that the volume of the buoyant body 7 is calculated as appropriate based on the buoyancy of the floating body 2 and the horizontal force.

[Effect]

In other words, when mooring a large floating body 2 to a pumped storage power generation battery or the like with a large water level difference, unless the floating body 2 is moored on land or underwater and the deviation of the mooring cable 6 due to the water level difference is corrected in some way, the floating body 2 will be However, in the present invention, this deviation of the mooring line 6 is automatically corrected by the combination of the buoyant body 7 and the pulley 3, and the position of the floating body 2 is fixed at a predetermined position (4). can be done.

[Effects of the present invention]

Therefore, in the floating body mooring method of the present invention, the combination of the pulley and the buoyant body allows the floating body to maintain its vertical position even when a difference in water level occurs or even when a large horizontal force is applied to the floating body and the floating body attempts to shift from its fixed position. The horizontal component of the force acts against the external force and keeps the floating body in place.

In particular, the present invention does not require a large-scale structure such as a mooring tower, so the construction period is shortened, and since no power is used, it is highly economical.

Note that the present invention can be effectively applied to a floating body that is installed in a place where there is a particularly large difference in water level, such as a reservoir for pumped storage power generation in a mountainous area.

[Brief explanation of the drawing]

The drawing is a schematic diagram of a mooring device in an embodiment of the present invention. 2.2'... Floating body, 6... Pulley, 4... Anchor, 5... Ridge, 6... Mooring rope, 7... Buoyant body.

Claims (1)

[Claims] Pulleys are attached to the submerged ridges on both sides of the floating body floating on the water surface, and both ends of the mooring rope wound around the pulleys are connected to both sides of the floating body at the middle part of the vessel. A method for mooring a floating body, which comprises attaching buoyant bodies to each mooring line and always fixing the floating bodies at a predetermined position.