Device for inserting gas bubbles into a liquid
The invention relates to a device ( 1 ) for inserting gas bubbles into a liquid, the device including a base plate ( 2 ) with a gas supply opening ( 3 ) which is connected to a gas supply device ( 3 ) and closable by a valve, wherein a valve element ( 12 ) is fixed in the operating position directly to the upper side of the base plate ( 2 ).
1. An aeration device with a gas supply device for introducing gas bubbles into a liquid, a base plate and a membrane detachably retained on one side thereof, the base plate having formed therein a gas supply vent the gas supply vent comprising a valve member made of resilient material, the gas supply vent being connected to the gas supply device wherein
the gas supply device has at least one tubular gas supply channel, and further has a base plate connecting part with a grid structure for gas-outlet on the upper side thereof, which base plate connecting part is retained in the gas supply vent; and wherein
the valve member has at least one slot, the valve member being directly attached to an outer surface of the base plate at the circumference of the gas supply vent,
whereby the gas supply vent can be closed when the gas supply is interrupted.
2. The aeration device according to claim 1 , wherein the grid structure of the base plate connecting part is detachably retained by snug fitting in the gas supply vent.
3. The aeration device according to claim 2 , wherein the gas supply vent, the valve member and the base plate connecting part are, in top view, substantially circular.
4. The aeration device according to claim 3 , wherein the valve member is attached within an attachment region provided at the edge of the gas supply vent by an adhesive.
5. The aeration device according to claim 4 , wherein at least one slot is designed to have a shape which in top view is arch-shaped, linear, Y-shaped, cross-shaped or star-shaped.
6. The aeration device according to claim 5 , wherein the slot is arch-shaped and the curvature of the arch-shaped slot corresponds to the curvature of the circular shape of the gas supply vent.
7. The aeration device according to claim 2 , wherein a tubular gas supply channel terminates in the base plate connecting part which is disc-shaped and has a step-like edge to fit snugly in the gas supply vent.
8. The aeration device according to claim 1 , wherein the base plate having two longitudinal sides and two end faces, is in top view of rectangular shape, wherein the membrane is retained detachably along the longitudinal side of the base plate and wherein the gas supply vent having the valve member is arranged close to one of the end faces of the base plate in the region of the longitudinal centre of the base plate.
9. The aeration device according to claim 5 , wherein the slot of the valve member is annular-shaped and has a concave side which faces one of the end faces opposite the gas supply vent of the base plate.
10. The aeration device according to claim 1 , wherein the gas supply device is insertable from one of the end faces of the base plate to the longitudinal centr of the base plate.
11. The aeration device according to claim 1 , wherein end-face end parts are detachably mounted on the end faces of the base plate, and are connected to the base plate via at least one plug-in connection.
12. The aeration device according to claim 1 , wherein the base plate comprises longitudinal grooves at the edges for clamping a perforated membrane in which, a locking member that fits in the respective longitudinal groove is provided.
13. The aeration device according to claim 12 , wherein the resilient material of the valve member corresponds to the material of the membrane.
14. The aeration device according to claim 11 , wherein
the base plate having two longitudinal sides and two end faces is, in top view, of rectangular shape; and
the end parts comprise clamping grooves for retaining the membrane at the base plate.
15. The aeration device according to claim 14 , wherein the clamping grooves comprise a rib.
16. The aeration device according to claiml 2 , wherein the perforated membrane is additionally adhered to the longitudinal sides and/or to the end face of the base plate wherein a polyurethane adhesive is introduced, in the longitudinal grooves of the base plate or, in the clamping grooves of the end parts.
17. The aeration device vice according to claim 1 , wherein the base plate is cambered, and is configured integrally with a stiffening web as an extruded part.