Quick-opening blind plate is installed on the opening of pipelines and pressure vessels. It is a fixed quick-opening device installed at the opening of pipelines for cleaning and dredging pipelines and inspecting and cleaning vessels. It is suitable for devices such as transceiver devices and filters of pigging devices. According to the structure form, it can be divided into two types: plug-type fast opening blind and clamp type fast opening blind. Fast-opening blind to purify the gas through the entrance into the equipment within the area, cyclone separator when impurities in gas after entering the cyclone tube along the axial direction, air flow by the guide vane and produces strong rotating the guide function of air flow along the cylinder spiral downward into the cyclone cylinder, dense droplets and dust particles under the action of centrifugal force is flung to the wall, and under the action of gravity, along the wall falling dust flow cyclone tube mouth to the liquid storage area at the bottom of the device, from the device at the bottom of the hole of produced liquid, gas in the cylinder body contraction of rotating flow to the center, the secondary vortex by airway flow upward to purify the gas chamber, then through the top equipment export flow, Cyclone separator adopts vertical cylinder structure, the axial divided into intercepting area, internal cyclone separation zone, purification room area, inner whirlwind sub components, evenly arranged by circumferential direction is through the tube plate fixed up and down, mining skirt supporting equipment, the high-pressure head adopts elliptical head for moisture, we often use the lower intake scheme, because the lower intake can take advantage of the lower part of equipment space droplets of diameter is larger than 300 or 500 pre separation to alleviate the whirlwind part load.