Cable type backflow device

A Soxhlet reflux device belongs to the technical field of solvent extraction and comprises a condenser, an extraction tube and a flask which are sequentially connected from top to bottom, a siphon pipe and a connecting pipe are respectively arranged on two sides of the extraction pipe, a functional layer wraps the outer side of a pipe body of the extraction pipe, the siphon pipe is partially exposed outside, and the functional layer wraps the upper half part of the flask body; the extraction device is simple in structure, heat of the flask at the bottom is partially guided into the extraction tube through the functional layer, so that the extraction tube is always kept at a higher temperature, the reflux speed is finally greatly improved, and meanwhile, the siphon is exposed outside, so that an operator can conveniently observe the reflux condition in time. 一种索式回流装置，属于溶剂萃取技术领域，包括自上而下依次连接的冷凝器、提取管以及烧瓶；所述提取管两侧分别有虹吸管和连接管，所述提取管的管体外侧包裹设有一层功能层，且所述虹吸管部分裸露于外界，其中，所述功能层包裹至所述烧瓶的上半部瓶体；本实用新型结构简单，通过功能层将底部烧瓶的热量部分导入到提取管，使之始终保