Charging barrel quartz capsule heating loop

The utility model relates to a charging barrel quartz pipe heating ring, which comprises a circular quartz heating pipe bundle 4, circular pipe plates 5, an inner sleeve 3, an outer sleeve 1, circular end covers 6 and a heat insulating layer 2, wherein, the circular pipe plates 5 are fixedly connected with both ends of the circular quartz heating pipe bundle 4, the inner sleeve 3 is sheathed outside the circular quartz heating pipe bundle 4, the outer sleeve 1 is sheathed outside the inner sleeve 3, the circular end covers 6 are covered to both ends of the circular pipe plates 5, and the heat insulating layer 2 is embedded between the inner sleeve 3 and the outer sleeve 1 and also between the circular pipe plate 5 and the circular end cover 6. The heating ring has less heat loss and high thermal efficiency which reaches to above 90 percent; the needed pre-heating time of a screw extruder can be reduced from the original 2 to 2.5 hours to 40 minutes by now; the production efficiency is greatly increased; moreover, the raw material cost of the quartz pipe heating ring is low, and the weight is light.