The utility model relates to the technical field of
medical instruments, in particular to a high-pressure
radiography injection needle cylinder. The high-pressure
radiography injection needle cylinder comprises a needle cylinder body, clamping blocks, a liquid outlet, a threaded sleeve, a
piston, a fixing ring, a fixing block, a rotating ring, a rotating block and a first
torsion spring, the right side of the needle cylinder body is vertically and symmetrically connected with the clamping blocks, and the left end of the needle cylinder body is connected with the liquid outlet. A threaded sleeve is connected to the left end of the needle cylinder body and located on the outer side of the liquid outlet, a
piston is connected to the right end in the needle cylinder body, a fixing ring is connected to the right side of the needle cylinder body, and three fixing blocks are evenly connected to the outer side of the fixing ring. The clamping block and the needle cylinder base of the high-pressure
injector are fixed through a rotary buckle structure, and on the basis, the mode that the rotating block abuts against the needle cylinder base is added, so that a double-
locking mechanism is achieved, it is guaranteed that the needle cylinder and the needle cylinder base are connected more firmly, and the risk that a needle cylinder body loosens or falls off in the high-
pressure injection process is reduced.