Underwater low-disturbance separation device

The invention discloses an underwater low-disturbance separation device and belongs to the technical field of mechanical structures. The underwater low-disturbance separation device is applied to a vertical floating warhead of a long-range self-propelled naval mine. Due to the low-disturbance separation function of the underwater low-disturbance separation device, the initial launching disturbance of an engine can be reduced, finally the quality of a floating trajectory is improved, and trajectory distribution is reduced. In the service period, the vertical floating warhead is moored underwater in a two-point mode through the separation device and a mooring system installed at the tail portion of the vertical floating warhead so as to be concealed for waiting to make an attack; when an attack instruction is received, the engine is started, and the internal pressure of the engine is rapidly increased through generated fuel gas; when the internal pressure reaches a certain value, a limiting plug of the separati