The invention relates to the technical field of biological printing, in particular to a replaceable 3D printing
nozzle for
Crohn disease perianal
fistula, which comprises a
nozzle main body, a partition plate fixing block is arranged at the upper part in the
nozzle main body, an air guide inner
diameter is formed in the partition plate fixing block, a
locking plate pipe diameter connecting part is arranged on one side of the air guide inner
diameter, and a
locking plate pipe diameter connecting part is arranged on the other side of the
locking plate pipe diameter connecting part. And a clamping ball pipe diameter connecting part is arranged below the locking plate pipe diameter connecting part. According to the replaceable 3D printing nozzle for the crissum
fistula of the
Crohn disease, a clamping ball structure and a locking plate structure are linked through a clamping ball pipe diameter connecting part, an air guide inner diameter and a locking plate pipe diameter connecting part, so that automatic locking of the 3D printing nozzle is completed; the situation that normal use of a biological 3D printer is affected by a 3D printing nozzle
gyroscope due to unstable installation in the use process of the 3D printing nozzle is avoided, after use is finished, the 3D printing nozzle can be disassembled and unlocked only by disassembling the air discharging cover and releasing air in the air guiding inner diameter, and the 3D printing nozzle is convenient to assemble and disassemble.