Shut-off valve, and hydrogen tank system comprising shut-off valve

1 . A shut-off valve ( 1 ) for hydrogen tank systems, the shut-off valve ( 1 ) comprising:

a main valve ( 2 ) having a reciprocally movable valve member ( 3 ) which is formed of one or more pieces and interacts at one end with a valve seat ( 4 ) and delimits at another end a control chamber ( 5 ),

a control valve ( 6 ) having a reciprocally movable control valve piston ( 7 ) for opening and closing a housing-side control valve seat ( 8 ) via which the control chamber ( 5 ) can be connected to at least one pressure-regulating region ( 9 , 10 ), and

a solenoid ( 11 ) for acting on a first armature ( 12 ), which is connected to the control valve piston ( 7 ) or forms the control valve piston ( 7 ), and a second armature ( 22 ), which is connected to the valve member ( 3 ) of the main valve ( 2 );

wherein the control valve piston ( 7 ) is biased by a spring force of a spring ( 13 ) in a direction of the control valve seat ( 8 ), and

wherein the spring ( 13 ) is supported at one end on the valve member ( 3 ) of the main valve ( 2 ).

2 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the control chamber ( 5 ) is fluidically throttling connected to a valve chamber ( 20 ) of the main valve ( 2 ), wherein a sealing element is provided in a guide area ( 23 ) of the valve member ( 3 ) of the main valve ( 2 ) between the control chamber ( 5 ) and the valve chamber ( 20 ).

3 . The shut-off valve ( 1 ) according to claim 2 ,

wherein a gas line ( 21 ) opens into the valve chamber ( 20 ) of the main valve ( 2 ), via which the valve chamber ( 20 ) can be connected to a storage volume of a pressurized gas tank of the hydrogen tank system.

4 . The shut-off valve ( 1 ) according to claim 1 , wherein the at least one pressure-regulating region ( 9 , 10 ) includes a pressure-regulating region ( 9 ) of the control valve ( 6 ) and a pressure regulating region ( 10 ) of the main valve ( 2 ), wherein the pressure-regulating region ( 9 ) of the control valve ( 6 ) is connected to the pressure-regulating region ( 10 ) of the main valve ( 2 ).

5 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the valve member ( 3 ) of the main valve ( 2 ) is biased by a spring force of a spring ( 14 ) in an opening direction.

6 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the valve member ( 3 ) of the main valve ( 2 ) comprises a first valve member piece ( 3 . 1 ) that interacts with the valve seat ( 4 ), and a further valve member piece ( 3 . 2 ) that delimits the control chamber ( 5 ).

7 . The shut-off valve ( 1 ) according to claim 6 , wherein the further valve member piece ( 3 . 2 ) is guided via a guide area ( 23 ) in a reciprocally moveable manner and/or comprises an annular collar ( 16 ) that interacts with a stop ( 15 ).

8 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the control valve piston ( 7 ) and/or the first armature ( 12 ) delimits or delimit the control chamber ( 5 ) and wherein a connection between the control chamber ( 5 ) and a control valve chamber ( 18 ) is established via at least one flow-through opening ( 17 ) configured in the control valve piston ( 7 ) and/or in the first armature ( 12 ).

9 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the first armature ( 12 ) is configured as a flat armature or comprises a portion configured as the flat armature.

10 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the second armature ( 22 ) is configured as a plunger armature or comprises a portion configured as the plunger armature.

11 . The shut-off valve ( 1 ) according to claim 1 ,

wherein the main valve ( 2 ) and the control valve ( 6 ) are arranged coaxially and/or accommodated in a common housing ( 19 ).

12 . A hydrogen tank system comprising at least one pressurized gas tank and a shut-off valve ( 1 ) according to claim 1 , wherein the shut-off valve ( 1 ) is integrated into the pressurized gas tank.

13 . The hydrogen tank system according to claim 12 , wherein the shut-off valve ( 1 ) is integrated into in a cylinder neck of the pressurized gas tank.

14 . A shut-off valve ( 1 ) for hydrogen tank systems, the shut-off valve ( 1 ) comprising:

a main valve ( 2 ) having a reciprocally movable valve member ( 3 ) which is formed of one or more pieces and interacts at one end with a valve seat ( 4 ) and delimits at another end a control chamber ( 5 ),

a control valve ( 6 ) having a reciprocally movable control valve piston ( 7 ) for opening and closing a housing-side control valve seat ( 8 ) via which the control chamber ( 5 ) can be connected to at least one pressure-regulating region ( 9 , 10 ), and

a solenoid ( 11 ) for acting on a first armature ( 12 ), which is connected to the control valve piston ( 7 ) or forms the control valve piston ( 7 ), and a second armature ( 22 ), which is connected to the valve member ( 3 ) of the main valve ( 2 );

wherein the valve member ( 3 ) of the main valve ( 2 ) is biased by a spring force of a spring ( 14 ) in an opening direction.