Anti-flooding device
An anti-flooding device ( 10 ) including a duct ( 12 ) for passage of a flow of liquid, and a limiter ( 14 ) inserted along the duct ( 12 ) for passage of liquid and defining a section for passage of the liquid that decreases progressively as the flowrate of liquid increases, with closing of the duct ( 12 ) once a given threshold flowrate has been reached. The limiter ( 14 ) has at least one male element ( 18 ) and at least one female element ( 20 ), which are mobile with respect to one another so that they slide into one another as the flowrate of liquid increases. Progressive insertion into one another of the male element ( 18 ) and the female element ( 20 ) defines the section of passage. The male element ( 18 ) and female element ( 20 ) are shaped with respect to one another so as to reduce the section of passage as the flowrate increases, with closing of the duct ( 12 ) for passage of liquid as soon as a given threshold flowrate is reached.
1. An anti-flooding device comprising:
a duct for passage of a flow of liquid;
limiting means inserted along the duct and defining a section of passage of the liquid that decreases progressively as the flowrate of liquid increases, wherein the duct closes once a given threshold flowrate has been reached;
an anti-flooding open/close element associated with said limiting means and an anti-flooding seat set along said duct for passage of liquid;
wherein the limiting means comprise at least one male element and at least one female element, wherein the male element and the female element are mobile with respect to one another so that they slide into one another as the flowrate of liquid increases, progressive insertion into one another of said male element and said female element defining said section of passage; and
wherein the male element and female element are shaped with respect to one another so as to reduce said section of passage as the flowrate of liquid increases, wherein the duct for passage of liquid closes as soon as a given threshold flowrate is reached.
2. The anti-flooding device according to claim 1 , further comprising an elastic retention element set between said male element and said female element.
3. The anti-flooding device according to claim 1 , wherein said male element comprises at least one wedge with cross section increasing in a direction opposite to the normal flow of liquid, which is designed to insert in a corresponding slot of said female element.
4. The anti-flooding device according to claim 3 , wherein said at least one slot is made in an external surface of said female element.
5. The anti-flooding device according to claim 4 , wherein said female element comprises two or more slots distributed along the external surface of the female element.
6. The anti-flooding device according to claim 1 , wherein said anti-flooding open/close element closes said anti-flooding seat under the action of the thrust exerted by said limiting means once said threshold flowrate is exceeded.
7. The anti-flooding device according to claim 1 , wherein said anti-flooding open/close element is associated with one of said male element and said female element.
8. The anti-flooding device according to claim 7 , wherein said anti-flooding open/close element is associated with one of between said male element and said female element by a stem set along said duct for passage of liquid.
9. The anti-flooding device according to claim 7 , wherein said anti-flooding open/close element is connected to said male element, wherein said male element is mobile with respect to said female element until said threshold flowrate is reached.
10. The anti-flooding device according to claim 1 , further comprising an anti-flooding elastic element acting to maintain said anti-flooding seat open.
11. The anti-flooding device according to claim 10 , wherein said anti-flooding elastic element is set between a portion of the duct for passage of liquid and said limiting means.
12. The anti-flooding device according to claim 10 , wherein said anti-flooding elastic element is set between said duct for passage of liquid and said female element of said limiting means.
13. The anti-flooding device according to claim 10 , wherein said anti-flooding elastic element is pre-loaded in a condition of rest or normal use of the apparatus set downstream of the anti-flooding device.
14. The anti-flooding device according to claim 10 , comprising an elastic retention element set between said male element and said female element, wherein said anti-flooding elastic element has a greater stiffness than said elastic retention element.
15. The anti-flooding device according to claim 1 , further comprising a valve associated with a downstream end of said duct for passage of liquid and defining said anti-flooding seat.
16. The anti-flooding device according to claim 15 , wherein the position of said valve is adjustable along said duct for passage of liquid.
17. The anti-flooding device according to claim 1 , wherein said limiting means comprise a retention open/close element and wherein said duct for passage of liquid comprises a retention seat set upstream of said limiting means with reference to the normal flow of the liquid, said retention open/close element being designed to close said retention seat once the flow of liquid ceases.
18. The anti-flooding device according to claim 17 , wherein said retention open/close element is connected to said male element of said limiting means.
19. A connection device for a dispenser for drinking water, comprising a pressure limiter and an anti-flooding device according to claim 1 .