Patent ID: 8733267

Claim:
A telescopic submarine, comprising: a front submarine unit ( 1 ), a rear submarine unit ( 2 ), and a lift tower ( 3 ), wherein said front submarine unit ( 1 ) comprises a submarine bow ( 4 ), which is domed, a front submarine body ( 5 ), which is cylindrical, a first wedge-shaped keel ( 6 ) connected with a lower portion of said front submarine body ( 5 ), and a hydrocylinder ( 7 ), which is ring-shaped and connected with a rear end of said front submarine body ( 5 ), wherein a vertical section of said hydrocylinder ( 7 ) is in a shape of a stair ( 33 ), a spacing ring ( 8 ) is provided on an end portion of said hydrocylinder ( 7 ), said hydrocylinder ( 7 ) is connected with a controlling valve ( 10 ) and a hydraulic pump ( 11 ) via a pipeline ( 9 ), and said controlling valve ( 10 ) and said hydraulic pump ( 11 ) are respectively connected with a hydraulic oil tank ( 12 ), wherein said rear submarine unit ( 2 ) comprises a rear submarine body ( 13 ), which is cylindrical, a piston ( 14 ), which is ring-shaped and connected with a front end of said rear submarine body ( 13 ), a submarine stern ( 15 ), which is cone-shaped and connected with a rear end of said rear submarine body ( 13 ), and a second wedge-shaped keel ( 16 ) connected with a lower portion of said rear submarine body ( 13 ), wherein a cross-sectional area of said second wedge-shaped keel ( 16 ) is smaller than a cross-sectional area of said first wedge-shaped keel ( 6 ), a first piston ring ( 17 ) is embedded in an outer surface of said piston ( 14 ), a second piston ring ( 18 ) is embedded in an inner surface of said piston ( 14 ), said piston ( 14 ) and said hydrocylinder ( 7 ) operate with each other slidingly, a propeller ( 19 ), a horizontal rudder ( 20 ) and a vertical rudder ( 21 ) are installed in said submarine stern ( 15 ), and an external thread sealing door ( 22 ) is installed on a top portion of said lift tower ( 3 ).