Patent ID: 7343927

Claim:
An explosion protection valve ( 1 ) having a housing ( 2 ) and having a rotationally symmetrical closing body ( 3 ), guided within the housing, which, under the influence of a dynamic pressure can be pressed out of an open setting, in at least one motional direction (s) against a valve seat ( 4 ) into a sealing close setting and can be locked in a closed position by means of a catch device which is a collecting cone ( 15 ), wherein on the outer side of the closing body ( 3 ) in the region of the flow cross-section ( 24 ) formed between the closing body in the open setting and the housing, there are disposed interfering means ( 18 , 25 ) for generating a turbulent flow for rapidly increasing the dynamic pressure inducing the closing movement from said open position into the closed position in which the closing body is locked by the catch device, the interfering means have at least one interfering edge ( 26 ), which extends at least partially along a flow cross-section ( 24 ) and at which at least two wall portions meet at an angle less than 180°, whereas the interfering edge ( 26 ) is disposed on the closing body on its outer diameter (D 1 ), the closing body ( 3 ), at least on the side facing the valve seat ( 4 ), runs in relation to its cross section from its center axis ( 7 ) to the outer diameter (D 1 ) in at least two differently inclined or curved outer wall portions ( 5 , 6 , and 5 ′, 6 ′ respectively), said outer wall portions begin with a first outer wall portion ( 6 and 6 ′ respectively) and then with a second outer wall portion 5 and 5 ′ respectively), whereas the first outer wall portion defining an outwardly convex elliptical curve and the second outer wall portion defining a conical path.