Propulsion and steering device installed below sea level of outside of right and left shipwall in a ship

Abstract

There is provided a propulsion and steering device installed below a sea level of outsides of right and left ship walls in a ship. The device includes a manifold that is installed at a bottom of a hull in a longitudinal direction, and drains water introduced into a bow toward a stern; a propulsion unit that has a lower end rotatably connected to an end of the manifold close to the stern within a 360-degree range, and is provided to laterally discharge water; and a steering unit that is rotatably coupled to an end of the propulsion unit close to the stern, and rotates the propulsion unit in an arbitrary direction by a rotational force exerted from an outside.

What is claimed is: 
     
         1 . A propulsion and steering device installed below a sea level of outsides of right and left ship walls in a ship, the device comprising:
 a manifold that is installed at a bottom of a hull in a longitudinal direction, and drains water introduced into a bow toward a stern;   a propulsion unit that has a lower end rotatably connected to an end of the manifold close to the stern within a predetermined range, and is provided to laterally discharge water; and   a steering unit that is rotatably coupled to an end of the propulsion unit close to the stern, and rotates the propulsion unit in an arbitrary direction by a rotational force exerted from an outside,   wherein the manifold includes:   a main pipe that is disposed in a lower central line close to the bow of the hull, and is open toward the bow of the hull to form a water inlet;   a left branch pipe that is branched from the main pipe, and is disposed below a water level along an outside of a left ship wall of the hull toward the stern of the hull;   a right branch pipe that is branched from the main pipe, and is disposed below the water level along an outside of a right ship wall of the hull toward the stern of the hull; and   a plurality of direction changing units that is connected to the right and left branch pipes to be arranged below the water level along the outsides of the ship walls of the hull, and discharges sea water introduced into the right and left branch pipes to change a direction of the hull.   
     
     
         2 . The propulsion and steering device of  claim 1 , wherein the right and left branch pipes come in contact with the outsides of the ship walls of the hull, and are arranged adjacent to the water level. 
     
     
         3 . The propulsion and steering device of  claim 1 , wherein the right and left branch pipes are combined at an end of the hull close to the stern by a combination pipe, and are connected to the propulsion unit. 
     
     
         4 . The propulsion and steering device of  claim 1 , wherein the plurality of direction changing units come in contact with the outsides of the ship walls of the hull, and is arranged adjacent to the water level. 
     
     
         5 . The propulsion and steering device of  claim 1 , wherein the plurality of direction changing units is arranged in a line at a predetermined distance along the right and left branch pipes. 
     
     
         6 . The propulsion and steering device of  claim 1 ,
 wherein the direction changing unit includes:   a valve that opens or closes sea water within the right and left branch pipes;   a screw propeller that discharges the sea water by opening or closing the valve; and   an adjustment unit that is rotatably moved along a rotational shaft to adjust a discharge direction of the sea water discharged through the valve and the screw propeller.   
     
     
         7 . The propulsion and steering device of  claim 1 , wherein a plurality of warning sensors is arranged at the left branch pipe, the right branch pipe and the direction changing units to detect objects approaching from an outer periphery. 
     
     
         8 . The propulsion and steering device of  claim 7 , wherein the plurality of warning sensors is arranged along the left branch pipe, the right branch pipe and the direction changing units at a predetermined distance, and is arranged along a central line on a bottommost surface of the hull at a predetermined distance. 
     
     
         9 . The propulsion and steering device of  claim 1 ,
 wherein the propulsion unit includes:   a housing that has an upper end inserted into an inside or an outside of an end of the manifold close to the stern to be rotatably coupled;   an dischargeion pipe that has one end connected to a side surface of the housing, and discharges the introduced water through a water outlet which extends so as to be relatively lower than the manifold; and   a rotation supporting plate that supports a bottom of the housing such that the housing is not moved downward while being rotated, and has one end fixed to the stern.   
     
     
         10 . The propulsion and steering device of  claim 1 ,
 wherein the steering unit includes:   a steering shaft that is vertically disposed to the hull;   a steering gear that is provided at an end of the steering shaft, and is rotated in a predetermined direction; and   a propulsion gear that is provided on an outer surface of the steering unit to mesh with the steering gear.