Quick dismounting device for spray head and throat pipe at hot end of 3D printer

The utility model discloses a quick dismounting device for a nozzle and a throat pipe on a hot end of a 3D printer, and solves the problem that the nozzle and the throat pipe on the existing 3D printer are inconvenient to dismount. The device comprises a heating block, a throat pipe is detachably arranged in the heating block, and a spray head is detachably arranged below the throat pipe; and the heating block is in taper fit with the throat pipe. Compared with the prior art, the utility model has the advantages that: 1) the throat pipe is in taper fit with the heating block, the effective heat transfer can be effectively ensured, and the convenience in disassembly and assembly is increased, and 2) the retainer and the heating block have certain movement allowance, so that the taper fit of the throat pipe and the heating block is ensured, and the fit of the throat pipe and the cylindrical round hole of the radiating block is not interfered. 一种3D打印机热端上喷头与喉管的快拆装置，解决现在3D打印机上喷头和喉管拆卸不方便的问题。其包括加热块，加热块内可拆卸的设有喉管，喉管下方