The invention belongs to the technical field of fishing tools for marine fisheries, and mainly develops an invention design for otter board, an attachment of trawl fishing tools, used for bottom trawl operations. Further, the otter board comprises a main board with an oval arc surface. Wherein, among the upper top layer, the lower top layer, and the middle reinforcing plate of the main board, stiffened plates are respectively arranged. The upper top layer is a hollow shell, while the lower top layer is a solid body. Besides, the upper top layer is connected with a T-shaped detachable airfoil mechanism through a mechanical lock device to form an airfoil device. The mechanical lock device is fixed on the inner and outer sides of the upper top layer through an inner right connecting piece, an outer right connecting piece, an inner left connecting piece and an outer left connecting piece. Pins and caps are installed at the inner and outer bends. The airfoil device contains strengthening rib. Based on the invention, the friction between the otter board and the seabed can be reduced, so as to mitigate the great influence on the seabed and the marine environment. In addition, it can ensure the good stability while maintains the hydrodynamic performance of the original structure of the otter trawl. -2/3 Figure 3 Figure 4
Otter board with T-shaped detachable airfoil
18.02.2021
Patent
Elektronische Ressource
Englisch
Engineering Index Backfile | 1952
|Engineering Index Backfile | 1964
Engineering Index Backfile | 1952
|NTIS | 1994
|