Reliable flush valve
First Claim
1. A flush valve comprising:
- a valve body (1) having an inlet pipe (11) for supplying water therein and an outlet pipe (12) for draining water therefrom for flushing use;
a diaphragm valve (2) flexibly formed in said valve body (1) between said inlet pipe (11) and said outlet pipe (12);
said diaphragm valve (2) normally closing said outlet pipe (12);
a filter (3) and a magnet (3a) provided in said diaphragm valve (2) for filtering off dirts and rust as carried in a water flow through said valve;
a limit valve (4) flexibly formed in the valve body (1) between an upper cover (15) of said valve body (1) and said diaphragm valve (2);
a manual relief valve (5) and an electrically operated relief valve (6) disposed on opposite side portions on said upper cover (15) of said valve body (1), and operatively communicated with a chamber between said upper cover (15) of said valve body (1) and said diaphragm valve (2) through two relief vents (152,
153) formed in said upper cover (15), and said two relief valves (5,
6) communicated with said outlet pipe (12) through a relief port (19) circumferentially formed in said valve body;
with said electrically operated relief valve (6) actuated by a controller (7) mounted on said valve body (1); and
a self-regulating valve (8) resiliently held in said outlet pipe (1) for maintaining a constant flow rate of a flushing water drained through said self-regulating valve (8) and said outlet pipe (12);
whereby upon manual actuation of said manual relief valve (5) or upon automatic actuation of said electrically operated relief valve (6) to open either said relief valve (5,
6), the water pressure and water in said chamber between said diaphragm valve (2) and said upper cover (15) will be released through said relief port (19) and outlet pipe (12) to open the diaphragm valve (2) for draining water through said outlet pipe (12) in a pre-set time period as pre-set in either said relief valve (5,
6); and
either said relief valve (5,
6) and said diaphragm valve (2) will be re-closed upon lapse of the pre-set time period; and
upon a constant opening of either said relief valve (5,
6), said limit valve (4) will automatically close said vents (152,
153) to stop water loss as released therethrough.
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Accused Products
Abstract
A flush valve includes: a valve body having a diaphragm valve flexibly formed in the valve body communicated with an inlet pipe for supplying inlet water and an outlet pipe connected to a toilet, a urinal or a sprinkler system, a filter and a magnet mounted in the diaphragm valve for filtering out the dirts or rust carried in the water, a limit valve formed in the valve body juxtapositioned to the diaphragm valve for automatically closing the relief vents and passages between the diaphragm valve and the outlet pipe in case of failure of a manual relief valve or an electrically operated relief valve, which controls the opening or closing of the diaphragm valve, with the manual relief valve operatively opening the relief vents or passages at the downstream side of the diaphragm valve in a pre-set time period for timely opening the diaphragm valve, and a self-regulating valve provided in the outlet pipe for automatically maintaining a constant water flow rate when subjected to a fluctuated water pressure in a plumbing system.
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Citations
10 Claims
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1. A flush valve comprising:
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a valve body (1) having an inlet pipe (11) for supplying water therein and an outlet pipe (12) for draining water therefrom for flushing use; a diaphragm valve (2) flexibly formed in said valve body (1) between said inlet pipe (11) and said outlet pipe (12);
said diaphragm valve (2) normally closing said outlet pipe (12);a filter (3) and a magnet (3a) provided in said diaphragm valve (2) for filtering off dirts and rust as carried in a water flow through said valve; a limit valve (4) flexibly formed in the valve body (1) between an upper cover (15) of said valve body (1) and said diaphragm valve (2); a manual relief valve (5) and an electrically operated relief valve (6) disposed on opposite side portions on said upper cover (15) of said valve body (1), and operatively communicated with a chamber between said upper cover (15) of said valve body (1) and said diaphragm valve (2) through two relief vents (152,
153) formed in said upper cover (15), and said two relief valves (5,
6) communicated with said outlet pipe (12) through a relief port (19) circumferentially formed in said valve body;
with said electrically operated relief valve (6) actuated by a controller (7) mounted on said valve body (1); anda self-regulating valve (8) resiliently held in said outlet pipe (1) for maintaining a constant flow rate of a flushing water drained through said self-regulating valve (8) and said outlet pipe (12); whereby upon manual actuation of said manual relief valve (5) or upon automatic actuation of said electrically operated relief valve (6) to open either said relief valve (5,
6), the water pressure and water in said chamber between said diaphragm valve (2) and said upper cover (15) will be released through said relief port (19) and outlet pipe (12) to open the diaphragm valve (2) for draining water through said outlet pipe (12) in a pre-set time period as pre-set in either said relief valve (5,
6); and
either said relief valve (5,
6) and said diaphragm valve (2) will be re-closed upon lapse of the pre-set time period; and
upon a constant opening of either said relief valve (5,
6), said limit valve (4) will automatically close said vents (152,
153) to stop water loss as released therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification