摘要:
Known water supply systems are fed from a source of water such as a tank (6) via a pump (5) to outlets which are occludable by means of a cock (C1-C3). A water pressure sensitive electrical switch (S1) is located downstream of the pump (5) and upstream of the outlets. The switch (S1) is connected in series with an electrical supply for the pump and turns the pump on in response in a drop in water pressure downstream of the switch. Similarly the pump is turned off in response to water pressure downstream to the switch reaching a predetermined minimum pressure, A control system is disclosed in the form of a timer (T) connected in parallel with the pump (5) and energized via the switch (S1). A normally closed safeguard switch (S2) is connected in series with the pump and rendered non-conductive by the timer (T) being energized for a predetermined period. The safeguard switch (S2) prevents the pump (5) operating continuously for more than a predetermine period, typically 15-30 minutes, As a consequence leaks in the system supplied by the pump (5) do not result in excessive water loss from the tank (6), A system and method to prevent water loss in a reticulated town water supply system is also disclosed by means of a flow detector (FD), a timer (T) and a normally open solenoid valve (SV).
摘要:
A centralized automatic fluid or gas spill prevention and shut-off valve system that prevents line ruptures comprising means to reduce fluid pressures, such as gas, to appropriate levels, a continuous monitoring of downstream conditions, an immediate stop system of major spillage caused by excessive flow wherein said immediate stop system automatically shuts off the flow of fluids, means for timed shut off of minor fluid flows that exceed a predetermined amount of time and a restarting system that restarts when overflow conditions are corrected, wherein said restarting system works automatically or manually.
摘要:
A magnetic control valve is provided in a suction powered pool cleaner (10) of the type for vacuuming dirt and debris from submerged floor and side wall surfaces of a swimming pool. The pool cleaner comprises a head defining a suction inlet (34) for vacuum inflow of water and debris into a plenum chamber (40), and further through a suction tube (42) adapted for connection via a vacuum hose (14) to a conventional pool water filtration system (12). The control valve includes an oscillatory valve member (64) movable between open and substantially closed positions relative to an upstream end of the suction tube to produce pressure fluctuations causing the cleaner to advance in steps over submerged pool surfaces. Oscillatory driving of the valve head is assisted by permanent magnets (74, 76, 78) mounted on the valve member and cleaner head to generate repulsion forces as the valve head respectively approaches the open and closed positions.
摘要:
A fluid pressure amplifier comprises a pipe for flowing fluid and having an array of holes formed therein through which fluid can flow from within the pipe in use and resiliently-movable obturator means adjacent the pipe and operatively responsive to fluid inlet pressure in the pipe, in which fluid inlet pressure causes the obturator means to oscillate between conditions which alternately permit and prevent fluid from passing through the holes, whereby the fluid leaving the pipe has a pulsed increased pressure. The amplifier is intended for use especially to increase the pressure of water flowing through a pipe submerged in a river, to provide a pumping action to a higher level.
摘要:
The valve comprises a chamber formed by a body and bonnet and having an intermediary plate through which a central shaft extends, a rotor being fitted around said central shaft and being submitted to the action of the fluid flowing into said chamber, said body having fluid outlet bottom orifices being each closed by a respective stopper, said stoppers being prised open by means activated by a reducing gear connected to said rotor. This valve is characterized in that it comprises a central device by means of which the fluid passage towards the rotor is controlled and can even be totally blocked in order to thus adjust the time during which each outlet will be held open, and also in order to keep a given outlet open and all of the remaining outlets closed when the valve has been arrested.
摘要:
Water treatment device, of the type whereby the water during treating is brought into contact with a treatment medium (29), whereby this treatment medium (29), either by means of a regeneration medium (42) or not, is regenerated regularly and whereby, to this aim, a regulator (59) is used which is provided, on one hand, with a hydraulically driven first monitoring mechanism (24) with which the water consumption can be controlled and the start of the regeneration cycle can be ordered, and, on the other hand, with a hydraulically driven second monitoring mechanism (25) with which the regeneration cycle is controlled, characterized in that both monitoring mechanisms (24, 25) are driven by means of the same volumeter (23).
摘要:
An irrigation pulser (13) comprising a housing having formed therein a header chamber (30), an inlet port (14) communicating with said header chamber and a discharge port (22) also communicating with said header chamber, a valve stem (16) having an inlet port plug (15) formed on one end thereof for selectively opening and closing said inlet port (14) and a diaphragm (17) formed at the other end of said valve stem (16) for selectively opening and closing said discharge port (22), a control tube (52) formed on said housing for pressure activation of said valve stem diaphragm (17) in order to open and close said inlet (14) and discharge (22) ports in response to the pressure within said control tube and an accumulator bellows (25) in selective fluid communication with said header chamber (30) through said discharge port (22) to temporarily store irrigation fluid therein, other end of the valve stem terminates in a piston, a valve plug circumscribing said piston in which said diaphragm establishes a fluid barrier for said piston and said plug to enable said piston and the valve stem associated therewith to move longitudinally and open said header port and to enable said plug to prevent irrigation fluid flow into said accumulator and to permit said piston to move in the other longitudinal direction to close said header port while flow to said accumulator is blocked, and after closing said header port to permit flow to said accumulator.
摘要:
A system for distributing irrigating fluid comprising a header (12), at least one irrigating line (33) in fluid communication with said header (12), at least one emitter valve (35) coupled to said header (12) and said irrigating line (33), an elastic tube (37) in fluid communication with said emitter valve (35), said elastic tube (37) providing a reservoir for the irrigating fluid and a means for discharging the irrigating fluid through said emitter valve (35), an irrigating fluid conduit (10), a pulser (13) for selectively coupling said conduit (10) to said header (12), and a pilot valve (53) in pressure communication with at least one of said elastic tube reservoirs (37) and said pulser (13), exclusive of the irrigation fluid, to enable said pulser to establish fluid communication between said header (12) and said conduit (10) in response to said elastic tube fluid.
摘要:
A valve assembly (10) includes a refrigerant inlet port (18) and a refrigerant outlet port (19) having a restricted opening (15), with the inlet port opening at least 2 times larger than the restricted outlet port opening. The valve includes components for opening and closing the inlet port (18) in response to valve cavity pressure between the inlet and outlet ports. The larger inlet port (18) relative to the restricted outlet port (19) provides for rapid pressure buildup in the valve cavity (24) when the inlet port is open which, in turn, causes rapid closing of the inlet port. The valve (10) is capable of rapid cycling rates, highly effective for small refrigeration or cooling apparatus, as well as for controlling pressure in other applications requiring pressure regulation.