Device for quickly mounting and dismounting filter

The utility model provides a device for quickly mounting and dismounting a filter. According to the device, an exhaust pipe and a pressure gauge are installed on a top cover, a quick-opening mechanism is installed at the joint of the top cover and a shell, a melt-blowing filter element is installed in the shell, a water outlet and a water inlet are formed in the two sides of the lower portion of the shell respectively, and bosses are arranged on the outer circumferences of an upper connecting piece and a lower connecting piece of the quick-opening mechanism. A sealing gasket is arranged between the upper connecting piece and the lower connecting piece, and the boss of the upper connecting piece and the boss of the lower connecting piece are connected through a clamping hoop and fastened through a fastening bolt. According to the device, a flange and bolt connection mode is replaced by a connection mode of the upper connecting piece, the lower connecting piece and the clamping hoop, so that the top cover and t