An irrigation valve has a liquid passage, a sealing diaphragm and a control port that can receive control signals. The sealing diaphragm is held in the valve in a non clamped manner and is adapted to seal the passage. Upon receipt of a control signal the sealing diaphragm bends and opens a path for
An irrigation valve has a liquid passage, a sealing diaphragm and a control port that can receive control signals. The sealing diaphragm is held in the valve in a non clamped manner and is adapted to seal the passage. Upon receipt of a control signal the sealing diaphragm bends and opens a path for liquid around the sealing diaphragm that can exit the valve.
대표청구항▼
1. An irrigation valve comprising: a liquid passage extending therethrough at least in part along an axis,a sealing diaphragm operatively coupled to the passage, anda control port for receiving a control signal, the control port not being in fluid communication with the liquid passage,the sealing di
1. An irrigation valve comprising: a liquid passage extending therethrough at least in part along an axis,a sealing diaphragm operatively coupled to the passage, anda control port for receiving a control signal, the control port not being in fluid communication with the liquid passage,the sealing diaphragm being held in the valve in a non clamped manner and being adapted to seal the passage,wherein upon receipt of a control signal the sealing diaphragm is urged to elastically bend to thereby open a path for liquid around the sealing diaphragm that flows downstream to exit the valve. 2. The irrigation valve according to claim 1, wherein the sealing diaphragm comprises opposing up and down surfaces and a peripheral side surface therebetween, the up and down surfaces respectively face upstream and downstream and at least a portion of the path for liquid around the sealing diaphragm flows in contact with the diaphragm along an imaginary route extending first upon the up surface then upon the side surface and then upon the down surface. 3. The irrigation valve according to claim 1, wherein the control signal is in the form of liquid pressure flowing inwards into the valve. 4. The irrigation valve according to claim 3 comprising an elastic control diaphragm located inward of the control port, the control diaphragm adapted to bend under the pressure of the control signal to thereby transfer a signal inwardly that causes the bending of the sealing diaphragm that forms the path around the sealing diaphragm. 5. The irrigation valve according to claim 4, wherein the control diaphragm when bended substantially seals the valve to inward flow of the control signal passed the control diaphragm. 6. The irrigation valve according to claim 1, wherein the sealing diaphragm is adapted to be biased axially upstream and axially downstream and at least when biased upstream is adapted to bear against a support of the valve and at least when biased downstream is adapted to bear against a rim of the valve, wherein the non clamped manner that the sealing diaphragm is held in the valve is characterized by the support not axially overlapping the rim. 7. The irrigation valve according to claim 6, wherein the sealing diaphragm when bearing against the rim seals the passage for liquid flow. 8. An irrigation pipe comprising an irrigation valve according to claim 1 configured to affect the flow through the pipe. 9. The irrigation pipe according to claim 8, wherein the irrigation valve is coupled to an end of the pipe and the opening of the path through the valve is adapted to flush liquid out of the pipe. 10. The irrigation pipe according to claim 8, wherein the irrigation valve is coupled to a beginning of the pipe and the opening of the path through the valve is adapted to allow liquid to flow downstream into the pipe. 11. An irrigation valve having an axis (X) defining an upstream end provided with an inlet and a downstream end provided with a control port; the irrigation valve comprising: a base provided at the upstream end of the valve, the base having an axially extending lumen and a support facing downstream, the inlet being associated with the base;a casing provided at the downstream end of the valve, the control port being associated with the casing;a partition having an upper cavity facing the downstream end and a lower cavity facing the upstream end, the upper and lower cavities extending axially one after the other and connected by a rim;a piston passing between the upper and lower cavities of the partition;at least one control diaphragm located between the control port and the piston; andat least one sealing diaphragm positioned in the valve between the support and the rim, wherein:introduction of fluid pressure via the control port causes the control diaphragm to flex and urge the piston towards the upstream end, resulting in the piston flexing the at least one sealing diaphragm and opening a path for liquid between the inlet and the at least one outlet; andthe rim and the support do not overlap in a direction along the axis (X). 12. The irrigation valve according to claim 11, wherein: the support comprises a plurality of spaced apart seats about the axis (X) which collectively define an effective supporting region of the support. 13. The irrigation valve according to claim 12, wherein: the sealing diaphragm has a width (W2) measured along the axis (X) that is smaller than an axial distance (C2) between the rim and the seats of the support. 14. The irrigation valve according to claim 11, wherein: the control diaphragm has a width (W1) measured along the axis (X) that is smaller than an axial distance (C1) between portions of the valve that axially confine the control diaphragm. 15. The irrigation valve according to claim 11, wherein: the lower cavity comprises a downwardly facing roof, and a shroud formed about a perimeter of the roof and projecting axially upstream below the roof;the upper cavity comprises an aperture and opens down into the lower cavity at the rim; andthe rim protrudes down beyond the roof into the lower cavity. 16. An irrigation pipe comprising irrigation valve according to claim 11 coupled to an end of the pipe. 17. An irrigation valve having an axis (X) defining an upstream end provided with an inlet and a downstream end provided with a control port; the irrigation valve comprising: a base provided at the upstream end of the valve, the base having an axially extending lumen and a support facing downstream, the inlet being associated with the base;a casing provided at the downstream end of the valve, the control port being associated with the casing;a partition having an upper cavity facing the downstream end and a lower cavity facing the upstream end, the upper and lower cavities extending axially one after the other and connected by a rim;a piston passing between the upper and lower cavities of the partition;at least one control diaphragm located between the control port and the piston; andat least one sealing diaphragm positioned in the valve between the support and the rim, wherein:introduction of fluid pressure via the control port causes the control diaphragm to flex and urge the piston towards the upstream end, resulting in the piston flexing the at least one sealing diaphragm and opening a path for liquid between the inlet and the at least one outlet;the support comprises a plurality of spaced apart seats about the axis (X) which collectively define an effective supporting region of the support; andthe sealing diaphragm has a width (W2) measured along the axis (X) that is smaller than an axial distance (C2) between the rim and the seats of the support. 18. The irrigation valve according to claim 17, wherein: the lower cavity comprises a downwardly facing roof, and a shroud formed about a perimeter of the roof and projecting axially upstream below the roof;the upper cavity comprises an aperture and opens down into the lower cavity at the rim; andthe rim protrudes down beyond the roof into the lower cavity. 19. The irrigation valve according to claim 17, wherein: the control diaphragm has a width (W1) measured along the axis (X) that is smaller than an axial distance (C1) between portions of the valve that axially confine the control diaphragm. 20. An irrigation pipe comprising the irrigation valve according to claim 17 coupled to an end of the pipe. 21. An irrigation system comprising: a plurality of drip irrigation lines;a valve coupled to an end of each drip irrigation line, each valve comprising a passage, a sealing diaphragm adapted to seal the passage and a control port that is adapted to receive a control signal for urging the sealing diaphragm to elastically deform and open the passage;a fluid source; anda control tube connecting the fluid source to each of the plurality of drip irrigation lines, the control tube being in fluid communication with the control port of each valve; whereinfluid from the fluid source is configured to enter, via the control tube, each valve at its control port to apply a control signal in the form of pressure to urge the valve to open and allow liquid from the drip irrigation line to be flushed downstream. 22. The irrigation system according to claim 21, wherein the fluid source comprises a manually operated pump. 23. The irrigation system according to claim 21, wherein the fluid source is also the source providing liquid to the irrigation system. 24. The irrigation system according to claim 21, wherein upon cessation of pressure at the control port the sealing diaphragm is adapted to seal back the passage of the valve.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (7)
Raines Kenneth C. (Bethlehem PA), Aspiration assembly having dual co-axial check valves.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.