Quick opening blind plate of the operating procedure is to remove the pressure alarm valve, the adjuster rod rotation 180 degrees. This simple operation can make the locking ring out of the outer flange, so that the door can be pulled open outside. The closing process is the opposite of the opening process. The key characteristic of fast opening blind plate is pressure self tight seal. Sealed in the inner surface of the door to be protected, the material range is very wide, suitable for use in vacuum high pressure grade. Safety is very important in today's industry, fast opening blind plate can not only fast operation and is conducive to the overall safety in order to avoid unsafe operation. In the locked position, the internal pressure of the locking member and the blind door lock barrel internodes to ensure that the door can not be opened. The application of pressure alarm valve makes security more strengthened. The locking ring movable member is connected to the pressure alarm valve to prevent accidental opening. Through the pressure alarm valve can know the pressure inside the container.

The clamp type quick opening blind plate has the following advantages:

1, has the self-locking function (blind self-locking, shockproof, anti loose, open two times relief) not only prevent the blind plate loose in the process of locking, but also to prevent the dangerous situation and the condition of pressure to open the blind plate.

2, the sealing ring and the sealing surface without relative rotation, the sealing ring is not easy to damage, so as to better protect the sealing system.

3, the external ring will blind the old-fashioned rotary buckle type three valve type, so as to realize the locking time of action, uniform stress, reduce open wire rod length, the switch becomes more flexible and reliable.

4, while increasing the bite force area, (occlusal area turnbuckle type blind plate of nearly 50%, a locking ring type blind plate occlusal area above 90%) is more suitable for large-diameter high-pressure natural gas pipeline, the main pressure parts of blind plate made of integral 20# or 16MnIII forged steel and the main bearing parts, no welding parts.

In addition, there are two types of fast opening blind plate. Horizontal for horizontal operation, quick opening blind plate with high load bearing hinge device, double fulcrum, the components can be fully loaded with blind door weight, and the minimum radius of gyration and repeated operation; vertical for vertical operation, quick opening blind plate with negative lifting arm structure capable of bearing high load can bear the weight of the door, blind and adjust the position of the blind plate securely in place. The blind plate of large diameter, blind door weight is a limiting factor for three lug lifting equipment from the top lift installed in the blind.