Special double-cylinder injector

The utility model discloses a double-cylinder special injector which comprises a first sleeve, a second sleeve and a core rod, an outer connector matched with an injection needle is arranged at the front end of the first sleeve, and a horn-shaped inlet I and a first protrusion are arranged at the rear end of the first sleeve; a hollow inner connector is arranged at the front end of the second sleeve, a hollow inner cavity of the inner connector is communicated with an inner cavity of the second sleeve, a sealing plug in sliding fit with the inner wall of the first sleeve is installed at the position of the inner connector, a first through hole matched with the inner connector of the second sleeve is formed in the sealing plug, and a second protrusion is arranged on the outer wall of the second sleeve behind the sealing plug. A trumpet-shaped inlet II and a third bulge are arranged at the rear end of the second sleeve; a piston matched with the second sleeve is installed at the front end of the core rod. The i