Manufacturing method for non-magnetic water-cooled microwave ablation needle

A method for manufacturing a nonmagnetic water-cooled microwave ablation needle, comprising the following steps:

• S1:
• removing an outer conductor from a head and tail ends of a coaxial cable to expose a dielectric layer, and then removing a front segment of the exposed dielectric layer to expose an inner conductor, wherein the outer conductor and inner conductor of the coaxial cable are both made of copper;
• S2:
• deforming and firmly connecting a copper pole shank and the inner conductor of the coaxial cable in a cold-pressing manner, wherein after being connected, the pole shank and the coaxial cable have the same center;
• S3:
• coating an outer surface of the pole shank and an inner hole of a zirconia penetrator with a ceramic adhesive, inserting the pole shank into the inner hole of the zirconia penetrator, and performing dry bonding;
• S4:
• sheathing a copper water plugging shaft and a water delivery pipe on the coaxial cable in sequence, wherein a head of the water plugging shaft abuts against a rear end face of the zirconia penetrator, and a tail of the water plugging shaft is welded to the outer conductor of the coaxial cable in a sealing manner, sheathing a front end of the water delivery pipe on an outer circle of a lifting shoulder of the water plugging shaft, and fixing the front end of the water delivery pipe to the water plugging shaft in a welding manner, wherein there is no dry joint;
• S5:
• sheathing a front end of a copper needle bar on an outer circle of the zirconia penetrator, fixing the needle bar to the zirconia penetrator and the water plugging shaft by using an epoxy resin adhesive, and performing rivet connection;
• S6:
• welding a copper radio frequency coaxial connector to a tail of the coaxial cable;
• and
• S7:
• mounting a water inlet sleeve, a water inlet chamber, a water outlet chamber, a water nozzle, and a handle;
• and
• wherein, in step S5, a surface of the water plugging shaft and an outer circle of a rear shaft of the zirconia penetrator are respectively coated with the epoxy resin adhesive, the needle bar is pushed to a tail face of the penetrator, there is no gap, the ablation needle is placed into a thermostatic drying chamber to be heated for 25 minutes to 35 minutes, and a temperature inside the thermostatic drying chamber ranges from 140° C. to 160° C.