Patent ID: 6892756
Filing Date: 2005-05-17
Classification: F16K,Y10T

Abstract:
1. Gas flow monitoring device to automatically shut off gas pipes, consisting of a gas-tight casing ( 1 ) with a valve seat ( 6 ) in its interior for a reseat body ( 14 ) that is movable inside the casing ( 1 ), with a pin ( 11 ) that acts as a guiding means to the reseat body ( 14 ), with an inlet guide ( 7 ) located in flow direction at the inlet inside the casing ( 1 ), with said inlet guide having a bearing ( 9 ) for the pin ( 11 ) and several collars ( 10 ) arranged in radial direction, with an outlet guide ( 8 ) located in flow direction at the outlet inside the casing ( 1 ), with said outlet guide having a bearing ( 12 ) for the pin ( 11 ) and several collars ( 10 ) arranged in radial direction, and with a reseat spring ( 16 ) that rests with its one end on the outlet guide ( 8 ) and with its other end on the reseat body ( 14 ) which is kept in open position by the spring force directed against the through-flow direction, and where flow through section, surface of reseat body ( 14 ) and forces are balanced in such a way that the reseat body ( 14 ) leaves its open position at a pre-defined value of the reseat flow and is moved towards the valve seat ( 6 ) of the casing ( 1 ) so that with the reseat body in shut position the gas pipe downstream of the gas flow monitoring device is shut off, characterised in that at the inlet guide ( 7 ) there is arranged a spacer block ( 17 ) that acts as a stop point ( 18 ) for the reseat body ( 14 ) with the gas flow monitoring device in open position and where the spacer block ( 17 ) is secured in its position by its lock-in grid ( 19 ) the locking elements of which catch and take hold behind the collars ( 10 ) of the inlet guide ( 7 ), and by the force of a spring ( 22 ) the one end of which rests on the side of the inlet guide ( 7 ) that faces away from the reseat body ( 14 ) and the other one that rests on the spacer block ( 17 ) itself.