Safety valve with vibration-damped valve spring

A safety valve, comprising a housing having inlet and outlet means;

• a valve spindle;
• a valve member mounted on said valve spindle movable together with the latter between an open position in which it allows communication between said inlet and outlet means, and a closed position in which it interrupts the same;
• a valve spring urging said valve member to said closed position and having a tendency to vibrate during the operation of the valve;
• lifting means arranged to lift said valve spindle and thereby said valve member to said open position, said lifting means including an abutment member provided on said valve spindle and formed as a lifting nut and a lifting member acting upon said lifting nut;
• a casing surrounding said valve spring;
• a tightening screw arranged in said casing and tightening said valve spring;
• and means for damping the vibrations of said valve spring during the operation of the valve, said damping means including a damping spring extending between said tightening screw of said valve spring and said lifting nut of said lifting means so as to constantly urge said lifting lever and thereby said valve spindle together with said valve member to said open position, and having a frequency differing from that of said valve spring, so that the different frequencies of said damping spring and said valve spring superimpose over one another and the vibrations of said valve spring are suppressed.

A safety valve, comprising a housing having inlet and outlet means;

• a valve spindle;
• a valve member mounted on said valve spindle and movable together with the latter between an open position in which it allows communication between said inlet and outlet means, and a closed position in which it interrupts the same;
• a valve spring urging said valve member to said closed position and having a tendency to vibrate during the operation of the valve;
• lifting means arranged to lift said valve spindle and thereby said valve member to said open position and having a lifting lever;
• and means for damping the vibrations of said valve spring during the operation of the valve, said damping means including a vibration-disturbing element formed as a damping weight which is provided on said lifting lever of said lifting means and constantly urges said lifting lever and thereby said valve spindle together with said valve member to said open position, said lifting lever having an end section provided with a separate member forming said damping weight.