Convenient dustless pass -through box that overhauls

The utility model discloses a convenient dustless pass -through box that overhauls, it relates to the pass -through box field, aims at solving traditional pass -through box and overhauls inconvenientproblem, and its technical scheme main points are including inlaying the fixed cover of establishing in the wall body and setting up the window frame body in fixed cover, fixed cover one end is connected with the spacing ring with the wall body contact perpendicularly, and the other end is connected with four limiting plates, the limiting plate is connected for the inlay card with fixed cover, andis provided with fastening device between limiting plate and the wall body, window frame body one end is connected with the first snap ring with the spacing ring contact, and the other end is connected with the second snap ring with the limiting plate contact, wear to be equipped with a plurality ofly on the second snap ring and the countersink bolt window frame body coupling, and then reached the effect that makes things