JPS592112Y2 - Cathodic protection device for connecting fittings for concrete anchors - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cathodic protection device for metal fittings that connect floating marine structures such as floating fish reefs, buoys, and floating breakwaters to concrete anchors.

One method of mooring floating marine structures such as floating fish reefs and buoys is to connect a synthetic mooring rope connected to the structure to a concrete anchor using iron connecting fittings. It is.

The connecting fittings of this mooring device consist of a U-shaped round steel that is buried and fixed in a concrete anchor, a simple wire connected to the tip of the mooring rope, and a shackle that connects them. It must be regularly repaired to shorten its lifespan due to corrosion when placed in the room.

In particular, there have been accidents in which the screw threads and split pins of shackle bolts corrode and wear out prematurely, causing the nuts to come off and the mooring ropes to come off the anchors, and appropriate anti-corrosion measures are desired.

To address these issues, one possible method to prevent corrosion of metals in seawater is to apply the widely used galvanic anode cathodic protection method, but this method involves attaching a galvanic anode to the object to be protected. Corrosion is usually prevented by this.

However, with this method, when the object to be protected against corrosion is small, such as the connecting fittings used in floating offshore structures, it is difficult to select the location to install the galvanic anode, and there is insufficient space for the anode to work effectively over a long period of time. However, it has been difficult to adopt this method due to possible drawbacks such as the inability to attach a large anode capacity.

The present invention was devised under these circumstances to make it possible to expect sufficient corrosion protection effects over a long period of time by using cathodic protection methods for connecting metal fittings used in floating marine structures. be.

Next, embodiments of the present invention will be described based on the drawings.

1 is a synthetic fiber mooring rope whose one end is connected to a floating fish reef (not shown), and the simple 2 is connected to the other end of this rope.

A U-shaped round steel 4 for mooring and a long bolt 5 for attaching a galvanic anode are buried and fixed in the concrete anchor 3, except for a part, and these buried parts are fixed to a round steel 6 for conductive use.
connected by.

The U-shaped exposed portion of the mooring round bar 4 and the simple 2 are connected by a shackle 7.

Further, a steel core 9 cast into the galvanic anode 8 is fitted into the exposed portion of the long bolt 5, and the galvanic anode 8 is fixed to the anchor 3 by tightening with a nut 10.

Note that 11 and 12 are a bolt nut and a split pin for the shackle, respectively.

Since the present invention is constructed in this way, the galvanic anode and the connecting fittings such as U-shaped round steel, shackles, simples, etc. are electrically connected, and therefore the anticorrosive current is applied to the surface of these fittings from the galvanic anode. is supplied to completely prevent corrosion.

In addition, since the galvanic anode is attached to the anchor, the weight, shape, etc. of the anode can be freely designed when designing anticorrosion.

That is, since a long-life anode can be easily installed regardless of the size of the object to be protected against corrosion, a sufficient corrosion protection effect can be expected over a long period of time.

The present invention has the advantage that it can exert a corrosion-preventing effect not only on the connecting fittings but also on the surface of the mooring rope if it is made of metal, and even on floating marine structures.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the device of the present invention. 1... Mooring rope, 2... Simple, 3... Concrete anchor, 4...
... Round steel for mooring, 5 ... Long bolt, 6 ...
... Continuity round steel, 7 ... Shackle, 8.
... Galvanic anode, 9... Anode core metal.

Claims (1)

[Scope of utility model registration request] A U-shaped metal rod for mooring and a metal bolt for attaching a galvanic anode are buried and fixed in concrete anchors, except for a part, and these buried parts are connected to the other side by a metal rod for continuity. A galvanic anode was attached to the anchor by connecting a simple attached to the tip of a mooring rope to the exposed part of the metal rod with a shackle, and by fixing the mandrel of the galvanic anode to the exposed part of the bolt. A cathodic protection device for connecting fittings for concrete anchors, characterized by: