The present disclosure relates to a sprinkler including both pressure regulation and flow throttling provided in the nozzle assembly.
Several major irrigation equipment manufacturers manufacture sprinklers which have pressure regulators incorporated into the sprinkler riser to which a nozzle assembly is attached. See, for example, U.S. Pat. No. 5,779,148. The pressure regulator may provide a relatively constant pressure to the attached nozzle assembly over a relatively wide range of flow rates and upstream nozzle assembly pressures for ¼, ½ or full circle nozzles.
Pressure compensating insertable elastomeric washers are manufactured to provide some pressure compensation with a different color code designating different nozzle flow rates. These washers, however, have limited flow and pressure ranges as provided by the deflection of an elastomeric disc with a sharp edge hole in the center which when the upstream pressure is high bend the elastomeric flow limiting disc with sharp edge hole and reduce the diameter of the upstream sharp edge. These pressure compensating washers may be incorporated into the nozzle assemblies or filter assemblies of existing sprinklers. As many as 12 or more may be necessary depending on the manufacturer to cover a range of flows for ¼, ½ and full circle sprinklers.
Co-pending U.S. patent application Ser. No. 12/348,864 filed Jan. 5, 2009 entitled ARC AND RANGE OF COVERAGE ADJUSTABLE STREAM ROTOR SPRINKLER and Ser. No. 11/438,796 entitled PRESSURE REGULATING NOZZLE ASSEMBLY filed May 22, 2006 discuss additional background information and are hereby incorporated by reference herein in their entirety.
The present disclosure relates to a compact, simple pressure regulating valve which may be compactly incorporated into a nozzle assembly itself so that nozzle pressure to its outlet orifice is fully controlled over a wide range of inlet pressures and nozzle flow rates for different nozzle types and flow rates and is referenced to atmospheric pressure for accuracy. One configuration of parts may be assembled with many different nozzle assembly output configurations.
A nozzle assembly according to an embodiment of the present application includes a self-contained pressure regulator adapted for connection to an existing water supply or sprinkler. The pressure regulator preferably includes a moveable pressure responsive member, a reference pressure area, a bias spring acting in opposition to water pressure against the pressure responsive member, a flow throttling member connected to the pressure responsive member to throttle the nozzle flow in accordance with the movement of the pressure responsive member to maintain a desired pressure for the nozzle water directing elements to function repeatedly under varying inlet pressure conditions.
The reference pressure area is preferably referenced to atmospheric pressure.
The pressure responsive member may be exposed to sense pressure in the nozzle housing at the nozzle housing outlet for water flow through the nozzle assembly to striking the spray deflector or rotating distributor of the nozzle assembly.
The nozzle assembly may also include a manually adjustable flow control valve where the pressure responsive member senses pressure at the inlet to the manually controlled flow throttling member which is upstream of the nozzle housing outlet for flow to strike the spray deflector or rotating distributor.
The pressure responsive member may be configured to sense pressure inside the filter prior to entering the nozzle housing assembly.
In the preferred configurations, the pressure regulation components are on the center axis line of the nozzle assembly housing.
The pressure responsive member may also actuate a pop-up deflector out of a protective position in the nozzle housing before its axial movement encounters a second bias spring for establishing the control pressure to the nozzle assembly.
A nozzle assembly in accordance with an embodiment of the present disclosure includes a lower housing configured for attachment to a sprinkler assembly, an upper housing mountable on the lower housing and including an outlet nozzle, a flow control ring positioned between the lower housing and the upper housing, the flow control ring movable relative to the upper and lower housing to control a flow water through the nozzle assembly, a distributor movably mounted in the nozzle assembly and configured to deflect water from nozzle outlet out of the nozzle assembly and a pressure regulating and throttling mechanism configured to maintain a desired pressure at an inlet of the lower housing.
A nozzle assembly in accordance with an embodiment of the present disclosure includes a lower housing configured for attachment to a sprinkler assembly, an upper housing mountable on the lower housing and including an outlet nozzle, a flow control ring position between the lower housing and the upper housing, the flow control ring movable to control a flow of water through the nozzle assembly, a distributor rotatably mounted on a support shaft that is mounted in the nozzle assembly for axial movement in the nozzle assembly, the distributor configured to deflect water out of the nozzle assembly; and a pressure regulating and throttling mechanism positioned in the lower housing and configured to maintain a desired pressure in the lower housing.
A nozzle assembly in accordance with an embodiment of the present application includes a lower housing configured for attachment to a sprinkler assembly, an upper housing mountable on the lower housing and including an outlet nozzle, a flow control ring positioned between the lower housing and the upper housing, the flow control ring movable to control a flow of water through the nozzle assembly, a distributor rotatably mounted on a support shaft that is mounted in the nozzle assembly for axial movement in the nozzle assembly, the distributor configured to deflect water out of the nozzle assembly and a pressure regulating and throttling mechanism positioned in the lower housing and configured to maintain a desired pressure in the lower housing.
Other features and advantages of the present invention will become apparent from the following description of the invention, which refers to the accompanying drawings.
The nozzle assembly 1 includes a lower housing 7 with an internal attachment thread 9 provided for attachment of the nozzle assembly 1 to a source of water, or irrigation sprinkler with, for example, a pop-up riser, an upper housing member 11, a nozzle housing outlet spray deflector 13 and the rotationally adjustable circumferential flow control ring 5. An attached inlet flow filter 14 is press fitted into the attachment thread 9 of the lower housing 7.
Manual flow control ring 5 includes feet 15 (see
The pressure regulating throttling member 19 is illustrated in further detail in
The pressure responsive piston assembly 24 is housed in a cylindrical housing 25, which is part of the upper housing 11 shown in
As can be seen in
The pressure in cavity area 30 will act on the underside of pressure responsive assembly 24 to generate a pressure area force that, if it exceeds the preloaded bias force of biasing spring 29, will force pressure responsive assembly 24 upward. This will pull connecting rod 22 up and move the pressure regulating throttling member 19 upward inside the diameter of the manual flow throttling valve member 15. The pressure regulating member 19 will then begin to close off the available flow openings 17 that provide flow into the nozzle assembly cavity 30. As a result, a desired constant operating pressure to nozzle housing outlet holes 32 is maintained. The flow through these outlet holes 32 strikes the bottom surface 35 of spray deflector 13 and generates a constant spray pattern projecting outward from this pressure regulated spray nozzle assembly 1.
If desired, a different spray pattern may be provided by incorporating a different discharge pattern piece, such as element 40 shown in
In another embodiment, the deflector 13 may be replaced by a shrub or tree watering flow bubbler nozzle assembly top 45 as is shown in
An alternative pressure regulating nozzle assembly 1A is shown in
The pressure regulation function is provided as previously discussed except that the pressure acting against the pressure responsive assembly 24 is provided in chamber 55, which is formed as part of the lower housing. In this configuration, however, the manually controlled flow throttling action occurs downstream of the pressure regulating function. Pressure from chamber 55 will flow up passage 51 along connecting rod 22 to the area under pressure responsive assembly 24. Pressure responsive assembly 24 has a low movement friction piston with a lip seal member 53. Thus, in this embodiment the pressure regulation is provided upstream of the flow range control throttling opening 50 by the upward movement of the pressure control throttling member 19 to reduce the flow area 17 into the lower housing 71.
The pressure responsive assembly 24B in this configuration has a double function of first sensing inlet water pressure as it is provided through the nozzle assembly filter 14 to move the pressure responsive assembly 24B upwardly against the spring 62. The spring 62 provides a biasing force to bias the rotary distributor 63 down into upper nozzle housing assembly 65 as shown. The pressure of water flowing through the filter 14 will raise the distributor 63 up when it provides sufficient pressure to overcome this biasing force. The rotationally fixed connecting rod 70 from the pressure responsive assembly 24B to viscous damped rotary distributor 63 is axially movable and is formed from a tubular material which may thus provide the atmospheric reference pressure vent to the spring chamber 71 through a vent groove 75 of the assembly 24B and the hollow area 72 of the tubular connecting rod 70.
As the inlet pressure to the nozzle housing assembly moves the pressure responsive assembly 24B upward against the downward retraction force of spring 62, the rotary deflector 63 is raised out of the upper nozzle assembly housing 65 until pressure responsive assembly 24B has pressed the upper end of a second spring 80, which is travelling upwardly with the assembly, against surface 81 at the upper end of the reference pressure chamber 71 and spring housing chamber 85. At this time, upward movement stops unless inlet pressure rises above a level sufficient to compress both spring 62 and spring 80 to move the shaft 70 upward further.
If so, pressure balanced pressure regulating flow throttling valve member 90 begins to be moved in front of the flow inlet ports 17B of lower housing 7B and reduces the available flow area into discharge flow chamber 95 due to high upstream pressure in order to maintain it at the desired level. The flow of water flows out of outlet 96 and strikes the rotating distributor 63 so that the nozzle assembly performance is uniform over a wide range of inlet pressures.
In this embodiment, however, the flow throttling to maintain desired pressure in chamber 95 occurs with the throttling fingers 101 covering the opening 17B in the outer lower nozzle housing 7B. These flow throttling fingers 101 as shown on the pressure balance flow throttling valve 100 (see
This pressure regulating control is provided upstream of the manually operated flow throttling that may be provided by circumferential flow throttling ring 5 so that any manual range control is pressure regulated for fluctuations of inlet pressure to the nozzle assembly 1C. In
In
The pressure regulator function has been separated from the rotating nozzle distributor retraction actuation system 181 to be located concentrically around the rotating distributor support and retraction shaft 70A at 160.
This pressure regulator area of the nozzle assembly is shown enlarged in
The unique, simple small pressure regulator described herein is possible because of the combination of a low friction lip seal in the pressure responsive member and a throttling element that has a small pressure surface in the axis in which the pressure responsive member moves and in which the throttling member is generally pressure balanced during throttling. In
In operation, the small concentric ring pressure regulator and an outside ring throttling element which is thin walled with a small downstream element 19A and upstream pressure axial acting pressure area 19B to oppose action of the pressure responsive pressure area 161 acting against its reference pressure area and bias of spring 140. That is, the axial facing areas 19A and 19B of the element 130 are relatively small such that they do not affect operation of the pressure regulating elements.
The flow throttling force is directed substantially normal to the throttle element 19 of the pressure response member 130 and the axially operating forces for moving the throttling member to establish a desired pressure in the nozzle housing. This concept allows the flow throttling area pressure dynamics to provide a reduced, or negligible, effect on the pressure control function of the pressure responsive piston area acting against its bias spring which is pre-loaded to keep the flow throttling area full open until the pressure inside the nozzle housing exceeds the pressure area load of the biasing spring. At this time, the added pressure begins to move the throttling member element into the flow path generally normal to the direction of flow through the throttling area to minimize its effect on the actuator pressure control.
In this position, the exit flow area 210 has been forced open as can be seen when comparing the exit nozzle area shown in the operating position of
Although the present invention has been described in relation to particular embodiments thereof, many other variations and modifications and other uses will become apparent to those skilled in the art.
The present application is a continuation of prior application Ser. No. 13/329,071, filed Dec. 16, 2011, now allowed, entitled PRESSURE REGULATING NOZZLE ASSEMBLY WITH FLOW CONTROL RING, which is a non-provisional of U.S. Provisional Application Ser. No. 61/423,904, filed Dec. 16, 2010, entitled PRESSURE REGULATION NOZZLE ASSEMBLY WITH FLOW CONTROL RING, the entire content of which is hereby incorporated by reference herein.
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Number | Date | Country | |
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20150158036 A1 | Jun 2015 | US |
Number | Date | Country | |
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61423904 | Dec 2010 | US |
Number | Date | Country | |
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Parent | 13329071 | Dec 2011 | US |
Child | 14625007 | US |