The multi-joint skeleton is light and convenient for installation and maintenance. Its quality directly affects the filtration status and service life of the filter bag. The multi-joint skeleton is mostly used for dust collectors. There is not enough space when installing the filter bag frame, and multiple heads are required. The dust collector skeleton is a dry gas that uses the centrifugal force generated by the rotating dust-containing gas to separate dust from the air stream. Solid separation device. When the airflow reaches a certain position at the lower end of the cone, the spiral flow continues from the middle to the bottom of the cyclone in the same direction of rotation. The post-purified gas is discharged out of the device through the exhaust pipe. A part of the uncollected dust particles also escaped.