There are many types of anchors. According to their different structures and uses, they can be divided into pole anchors, poleless anchors, high-holding anchors and special anchors. Merchant ships mainly use poleless anchors for their bow anchors, and sometimes pole anchors are used for their stern anchors. and swallowtail anchor.
1. With pole anchor
Also known as naval anchor, this type of anchor is an early anchor, also known as naval anchor. This type of anchor has a simple structure, a large grip-to-weight ratio, and good bottom grip stability, but it is not convenient for anchoring operations and storage. It is upturned. The anchor is easy to get entangled in the anchor chain and scratch the bottom of the ship. This kind of anchor is not easy to be used as the first anchor of a commercial ship and is generally used for small boats or sailboats.
2. Rodless anchor
Also called mountain anchors, the most common ones are Hall anchors and Spek anchors, which are rodless anchors with movable anchor claws (rotating back and forth about 45° along the anchor trunk). The anchor rod and anchor arm of the rodless anchor are cast separately. The anchor claw, anchor crown and anchor arm are cast into one piece. The anchor stem is inserted into the rectangular hole of the anchor crown, and is positioned in the two semicircular grooves at the lower part of the anchor crown with pins and transverse pins, so that the anchor stem can be rotated.
3. Large gripping anchor
High holding power anchors combine the advantages of rod anchors and rodless anchors, and are generally rod-claw anchors. Commonly used anchors include Markovian anchors and Danforth anchors, which are characterized by wide and long claws, deep soil bite, and good stability, thereby obtaining greater gripping power, and the grip-to-weight ratio can reach 11 to 17 times. However, the anchor claw is weak and easily deformed. And due to the large resistance to excavating, it is generally only suitable for engineering ships, and some are used as backup anchors or stern anchors.
4. Special anchor
Special-purpose anchors are commonly used for permanent moorings such as pontoons, buoys, lightships, floating docks and floating docks. There are single claw anchors, spiral anchors and mushroom anchors.
Post time: Aug-05-2024