| 摘要 |
A detonation flame arrester device including a left and right housing assembly containing two flapper plates positioned one in either side of the housing assembly and separated by a channeled barrier in the form of a stacked plate flame arrester designed to allow vapor passage under normal non-activated conditions. The flapper plates are positioned at an angle to be forced shut in advance of a detonation or deflagration wave coming from either direction and propagating through a piping system. The flapper plate is activated by the action of the pressure front on the flapper plate, and each plate is of a size and shape to cover the entire cross sectional area of the housing assembly. The flapper plates can optionally be slammed shut by torsion springs activated through alternate activation devices. Alternate activation devices include: fusible links which would release the torsion spring and shut the flapper plate upon exposure to excessive heat; flotation release devices which would activate the torsion spring and shut the flapper plate upon presence of sufficient liquid within the housing assembly; and external movement activation devices which would swivel float weight releasing torsion springs and activating flapper plates. Activation of either or both plates can be detected by an activation indicator connected to appropriate alarms and/or safety shutdown mechanisms of the protected piping system.
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