US20140001744A1 - Union Coupling With Removable Screen - Google Patents
Union Coupling With Removable Screen Download PDFInfo
- Publication number
- US20140001744A1 US20140001744A1 US14/012,647 US201314012647A US2014001744A1 US 20140001744 A1 US20140001744 A1 US 20140001744A1 US 201314012647 A US201314012647 A US 201314012647A US 2014001744 A1 US2014001744 A1 US 2014001744A1
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- US
- United States
- Prior art keywords
- fitting
- collar
- upstream
- downstream
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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- 238000005859 coupling reaction Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 41
- 230000002262 irrigation Effects 0.000 claims description 27
- 238000003973 irrigation Methods 0.000 claims description 27
- 230000013011 mating Effects 0.000 claims 1
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- 238000009434 installation Methods 0.000 description 8
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- 229920000459 Nitrile rubber Polymers 0.000 description 1
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/02—Filtering elements having a conical form
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0402—Cleaning, repairing, or assembling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/794—With means for separating solid material from the fluid
Definitions
- the field relates to pipe couplings used in irrigation and, more particularly, to pipe couplings having removable screens.
- Irrigation systems utilize a series of pipes or conduits for conveying water from a water source to a series or network of water emitters or sprinklers.
- Irrigation system components are typically installed and operate below ground level, which may cause rocks, dirt, and other debris to enter the irrigation system and travel along the pipes with the water flow. Contamination, particularly in the form of particulate matter, can impair the operation of components within the irrigation system.
- a component such as a valve
- some irrigation systems utilize a screen disposed at the inlet of the valve.
- a valve using such an approach suffers from a significant shortcoming in that a user must disconnect the valve from the upstream and downstream pipe in order to service the valve.
- the pipes are threadingly engaged with the valve and must be rotated to disconnect the pipe from the valve. This operation may be difficult and time consuming if the valve and the upstream pipe are in narrow confines or are otherwise limited in their range of movement.
- a union coupling has a pair of fittings or joints that may connect to other irrigation system components, such as the pipe and the valve.
- the union coupling further comprises a collar that is rotated or otherwise manipulated to draw the fittings together and form a connection therebetween.
- One type of existing union coupling includes a fitting having an annular ridge extending around one end of the fitting to restrict the collar from sliding off of the fitting. However, the collar is free to slide off the other end of the fitting until that end is connected to the pipe or valve. This approach may be problematic during installation, as the fitting with the annular ridge can be accidently installed onto the pipe or valve without the collar. If pipe cement or other chemical bonding has been used, subsequent removal of the fitting from the pipe or valve may cause damage to the fitting and require replacement.
- the annular ridge has to be small enough to permit the lip of the collar to snap beyond the annular ridge, the ability of the ridge to restrict the collar from falling off of the outlet is necessarily less than optimal. Accordingly, when a side load is applied to the manifold, the resulting bending moment between a manifold outlet and the corresponding fitting tends to cause the collar to snap past the annular ridge and off of the manifold outlet.
- FIG. 1 is a perspective view of a union coupling
- FIG. 2 is a cross-sectional perspective view of the union coupling of FIG. 1 taken across line 2 - 2 in FIG. 1 ;
- FIG. 3 is a cross-sectional perspective view of a fitting body and a collar of the union coupling of FIG. 2 ;
- FIG. 4 is a cross-sectional perspective view of the fitting body and the collar of FIG. 3 in conjunction with a shoulder element of the union coupling;
- FIG. 5 is a cross-sectional perspective view similar to FIG. 4 with the shoulder element connected to the fitting body;
- FIG. 6 is a cross-sectional perspective view of the fitting body, shoulder element, and collar of FIG. 5 , in conjunction with a screen of the union coupling;
- FIG. 7 is a cross-sectional perspective view similar to FIG. 6 with the screen installed within the fitting body and the shoulder element;
- FIG. 8 is an exploded perspective view of the union coupling of FIG. 1 ;
- FIG. 9 is a perspective view of the screen of the union coupling of FIG. 8 ;
- FIG. 10 is a side elevational view of an irrigation system subassembly which includes an irrigation system component and a pair of union couplings.
- a union coupling with a removable screen is provided that retains the screen in a user-serviceable portion of the coupling such that a user may readily access, clean, or replace the screen.
- the union coupling may be installed at any location within an irrigation system, though the union coupling is particularly well-suited for installation between a pipe and a valve or between two pipes.
- the union coupling comprises a pipe joint, a collar, and a fitting, wherein the collar is configured to clamp the fitting to the pipe joint.
- the fitting has an inner surface that defines a passage and has a pocket formed in the inner surface.
- the fitting has an opening at one end thereof that opens into the passage and is sized to accept at least a portion of a screen.
- the screen has a downstream portion that is inserted through the opening of the fitting and into the passage.
- the screen also has an upstream portion with a transverse extension, wherein the transverse extension is received in the pocket of the fitting.
- the engagement between the transverse extension of the screen and the pocket of the fitting restricts passage of the upstream portion of the screen beyond a predetermined position in the passage.
- the transverse extension of the screen comprises a tip portion that is received in the pocket, and a thin gripping portion that a user may conveniently grip to remove the screen from the fitting.
- the engagement between the transverse extension and the pocket requires the screen to be installed in the fitting in a particular orientation which ensures that the screen is properly installed within the union coupling.
- the union coupling comprises a pipe joint, a collar, and a fitting comprising a fitting body and a shoulder element.
- the fitting body has a first end that is configured to connect to the pipe joint.
- the collar is passed over the first end of the fitting body.
- the shoulder element is then connected to the fitting body which captivates the collar on the fitting body.
- the fitting body and the shoulder element have outward flange portions that restrain an inward flange of the collar therebetween.
- connecting the shoulder element to the fitting body after the collar has passed over the first end of the fitting body permits the outward flange portion of the shoulder element to be made sufficiently large to restrict movement of the collar.
- the outward flange portion of the shoulder element may be larger than the traditional annular ridge because the inward flange portion of the collar does not need to snap past the outward flange portion of the shoulder element.
- a larger shoulder element also has a larger bearing surface for engaging a sealing surface of the pipe joint which permits a more stable interface between the fitting and the pipe joint than conventional union couplings. As is apparent, this approach resists pulling apart of the fitting and pipe joint such that the union coupling may better resist side loading than traditional configurations.
- the union coupling has a fitting with an inner surface that defines a passage through the fitting.
- the fitting has a recessed support formed in the inner surface and at least one stop that extends from the inner surface and is spaced from the recessed support along the length of the fitting.
- the recessed support extends transversely to the length of the fitting and outwardly from the inner surface thereof.
- a screen is received within the fitting and includes an upstream end with a transverse extension that seats against the recessed support. Further, a downstream end of the screen includes a rim that rests against the stop. This way, the recessed support and the stop brace the screen against the flow of the water debris within the water flow.
- the rim of the screen has a continuous outer surface that is flush with the inner surface of the fitting when the screen is received within the fitting.
- the close fit between the rim of the screen and the inner surface of the fitting resists the passage of waterborne particles beyond the screen. Additionally, removing the screen from the fitting causes the screen rim to slide along the inner surface of the fitting and pull debris deposited on the inner surface of the fitting out of the fitting.
- FIGS. 1-9 illustrate an embodiment of a union coupling 1 comprising a pipe joint 2 , a collar 4 , and a fitting 6 .
- the coupling 1 may be installed between lengths of pipe, as well as between a pipe and a valve.
- the fitting 6 has a threaded portion 8 that is connected to the inlet of a valve (not shown). This way, water will flow in the direction of arrow 10 into the pipe joint 2 through the fitting 6 and eventually into the valve.
- the pipe joint 2 has a wall 12 that defines a passage 14 for receiving an end of a pipe (not shown) and an inner surface 16 configured to fit snugly with the end of the pipe.
- the pipe joint 2 also has a threaded portion 18 at the end of the pipe joint 2 adjacent the fitting 6 .
- the threaded portion 18 of the pipe joint 2 is configured to interface with threads (see FIG. 2 ) on an interior surface of the collar 4 .
- the engagement of the threads of the collar 4 with the threaded portion 18 of the pipe joint 2 is configured such that rotating the collar 4 draws the fitting 6 and the pipe joint 2 into abutting relation and clamps the fitting 6 against the pipe joint 2 .
- the collar 4 may include protuberances 20 positioned around the circumference of the collar 4 that assist with manual manipulation of the collar 4 .
- the fitting 6 may include flat surfaces 22 that are arranged around the circumference of the fitting 6 and interface with a wrench so that fitting 6 may be firmly connected to the downstream valve or pipe.
- the fitting 6 includes a passage 24 that is aligned with the passage 14 in the pipe joint 2 when the pipe joint 2 is connected to the fitting 6 via the collar 4 .
- a screen 26 is positioned within the fitting 6 and in the path of water flow shown by direction arrow 10 .
- the screen 26 includes fins or transverse extensions 28 that are each held within a recess or pocket 30 by the compression of an annular wall 32 of the pipe joint 2 .
- the screen 26 is inserted into the fitting 6 and the annular wall 32 of the pipe joint 2 is pressed against an upstream facing surface 34 of the fitting 6 before the collar 4 is rotatably engaged onto male threads 36 located on the pipe joint 2 .
- the fitting 6 may have a two-part construction comprising a fitting body 38 and a shoulder element 40 that are connected at a fixed joint 42 , preferably by a frictional spin weld.
- the spin weld is produced by pressing the shoulder element 40 against the fitting body 38 and rotating the shoulder element 40 until the friction therebetween generates localized heating. Once the heating reaches a sufficient temperature, the materials of the shoulder element 40 and the fitting body 38 melt together. The rotation is stopped and the fitting 6 is allowed to cool.
- the shoulder element 40 may be connected to the fitting body 38 via a chemical weld or mechanical means, such as fasteners which tightly clamp the shoulder element 40 to the fitting body 38 .
- the fitting body 38 has an annular wall 44 that partially defines the passage 24 .
- the wall 44 includes an outward flange 46 that projects radially outward from the wall 44 .
- the outward flange 46 defines an annular recess 48 that faces downstream and is configured to receive a seal or o-ring 50 .
- the o-ring 50 provides a water tight seal with the inlet of the valve.
- the fitting body 38 also includes an inwardly directed flange or stop flange 52 that is spaced from the pockets 30 of the fitting 6 along the length of the fitting 6 .
- the stop flange 52 projects radially inward from the inner surface 54 of the fitting 6 .
- the flange 52 comprises a plurality of ledges or stops having surfaces which face upstream and abut an end of the screen 26 to brace the screen 26 against the flow of water and debris.
- the stops are shown as being integrally formed with the fitting body 38 , though they may be separate structures that are connected to the fitting body 38 .
- the stop flange 52 may be a continuous radially projecting element to support the screen 26 .
- the upstream facing surface 34 of the fitting 6 defines a recess 56 configured to receive an o-ring 58 .
- the o-ring 58 forms a water-tight seal between the surface 34 of the fitting 6 and a downstream facing end surface 60 of the pipe joint 2 .
- Rotation of the collar 4 when threaded onto the male threads 36 of the pipe joint 2 tends to compress the o-ring 58 between the surfaces 34 , 60 which enhances the water-tight seal.
- the shoulder element 40 also includes an outward flange 62 that extends radially outward from the fitting 6 .
- the outward flange 62 of the shoulder element 40 and the outward flange 46 of the fitting body 38 restrain movement of an inward flange 64 of the collar 4 along the fitting 6 .
- the collar 4 With the inward flange 64 of the collar 4 between the outward flanges 46 , 62 , the collar 4 is captivated on the fitting 6 such that the collar 4 may only translate along the length of the fitting 6 between the flanges 46 , 62 . Further, the collar 4 may freely rotate about a longitudinal axis of the fitting 6 , as represented by line A-A in FIG. 2 .
- FIG. 3 shows the collar 4 being positioned on the fitting body 38 before the shoulder element 40 is connected to the fitting body 38 .
- the collar 4 has a wall 80 that includes female threads 82 on an inner surface 83 thereof which are configured to engage the male threads 36 on the pipe joint 2 .
- the inward flange 64 of the collar 4 defines an opening 84 that is sized to pass over a first end 86 of the fitting body 38 in direction 88 . Because the shoulder element 40 is not yet attached to the fitting body 38 , the collar 4 is free to be removed from the first end 86 of the fitting body 38 .
- the outward flange 46 is positioned intermediate the first end 86 and the second end 90 of the fitting body 38 .
- the outward flange 46 resists movement of the inward flange 64 of the collar 4 along the fitting body 38 toward the second end 90 of the fitting body 38 .
- FIG. 3 illustrates a series of concentric, annular lips 92 A- 92 C disposed at the first end 86 of fitting body 38 and grooves 94 A and 94 B concentrically disposed between the lips 94 A- 94 C.
- the shoulder element 40 is connected to the fitting body 38 via a spin weld. The spin welding process deforms lips 92 A- 92 C and welds the lips 92 A- 92 C to adjacent structures of the shoulder element 40 .
- FIG. 3 also illustrates an inner surface 96 of the fitting body 38 that defines a passage 98 extending along the length of the fitting body 38 .
- An opening 100 opens into the passage 98 at the first end 86 of the fitting body 38 , while at the second end 90 , the stop flange 52 projects radially inward from the inner surface 96 .
- the stop flange 52 comprises a series of equally spaced ledges or stops 102 A- 102 E extending radially inward from the inner surface 96 .
- the shoulder element 40 may be connected to the fitting body 38 in direction 110 , as shown in FIG. 4 .
- the shoulder element 40 has concentric, annular lips 112 A and 112 B configured to mate with lips 92 B and 92 C, respectively, of the fitting body 38 , while radially inner neck 114 mates with the lip 92 A. Adjacent the lips 112 A, 112 B of the shoulder element 40 are concentrically disposed grooves 116 A and 116 B, the grooves 116 A, 116 B being aligned with grooves 94 A and 94 B, respectively, of the fitting body 38 when the shoulder element 40 is connected to the fitting body 38 .
- the grooves 116 , 94 form annular pockets 117 A, 117 B that extend around the wall 44 of the fitting body 38 at the first end 86 (see FIG. 6 ).
- the pockets 117 A, 117 B defined by the grooves 94 , 116 permit the lips 92 , 112 , and neck 114 to deform during the spin welding process.
- the shoulder element 40 includes a radially inner surface 118 that defines an opening 120 .
- the opening 120 of the shoulder element 40 is aligned with the opening 100 of the fitting body 38 such that the radially inner surface 118 of the shoulder element 40 is flush with the inner surface 96 of the fitting body 38 .
- the screen 26 may be inserted into the passage 24 of the fitting 6 without snagging on the radially inner surface 118 of the shoulder element 40 or the inner surface 96 of the fitting body 38 .
- the shoulder element 40 may also include a series of pockets 30 disposed evenly around the radially inner surface 118 .
- Each pocket 30 includes a recessed support or seating surface 122 that extends perpendicularly to the inner surface 118 of the shoulder element 40 .
- the seating surface 122 is configured to restrict movement of the transverse extensions 28 of the screen 26 from traveling toward the second end 90 of the fitting body 38 .
- Alternative embodiments of the seating surface 122 may include a variety of configurations for the seating surface 122 .
- the seating surface 122 may be inclined at an angle relative to the inner surface 118 of the shoulder element 40 .
- the shoulder element 40 also may include an annular channel 123 that extends around the shoulder element 40 and receives the o-ring 58 .
- the o-ring 58 is configured to form a water-tight connection with the annular wall 32 of the pipe joint 2 when the coupling 1 is fully assembled.
- the shoulder element 40 is connected to the fitting body 38 to form the fitting 6 .
- the inward flange 64 of the collar 4 is captured between the outward flange 46 of the fitting body 38 and the outward flange 62 of the shoulder element 40 .
- the outward flange 46 and the outward flange 62 are in overlapping relation with the inward flange 64 of the collar 4 along the longitudinal axis of the fitting 6 .
- An interface 126 of the fitting 6 provides a smooth transition between the inner surface 118 of the shoulder element 40 and the inner surface 96 of the screen body 38 . In this way, the inner surface 54 of the fitting 6 defines a passage 24 for receiving the screen 26 .
- the fitting 6 and the collar 4 are effectively a single piece that may be handled and installed onto a valve or pipe without the collar 4 falling off or being incorrectly installed.
- the opening 120 of the shoulder element 40 opens into the passage 24 of the fitting 6 such that the screen 26 may be inserted in direction 140 into the passage 24 of the fitting 6 .
- the screen 26 has one or more transverse extensions 28 that each include a tip 142 at the outermost portion of the transverse extension 28 and a gripping portion 144 that extends from a mid point 146 of the screen 26 to the tip 142 .
- the gripping portion 144 is relatively thin and permits a user to grab the gripping portion 144 between the user's thumb and index finger or with a tool, such as a pair of pliers.
- Each transverse extension 28 also includes a rib 148 that extends between a downstream end 150 of the screen 26 and an upstream end 152 of the screen 26 .
- the transverse extensions 28 are organized in a cross configuration so that one pair of transverse extensions 28 lies along a plane that is perpendicular to a plane defined by the other pair of transverse extensions 28 .
- the transverse extensions 28 extend outward beyond an outer profile or outer surface 160 of the screen which permits the screen 26 to be clamped between the pipe joint 2 and the fitting 6 .
- a pair of outermost surfaces 154 and 156 defines a distance that is less than the distance between tip 142 A and tip 142 C.
- the narrower portions of the screen 26 permit the downstream end 150 of the screen 26 to be inserted into the passage 24 with the outermost surfaces 154 , 156 abutting the inner surface 96 of the fitting body 38 .
- the tips 142 extend outward beyond an outer surface 160 of the screen 26 which prevents over-insertion of the screen 26 in the passage 24 in direction 140 .
- the engagement of the tips 142 in the pockets 30 restricts movement of the screen 26 and, in combination with the stop flange 52 , braces the screen 26 against the water flow and debris suspended in the water that may impact against the screen 26 and force the screen 26 toward the second end 90 of the fitting body 38 .
- the screen 26 has a seating rim 158 that seats against the stop flange 52 and has a shape that is similar to the contour of the inner surface 96 of the fitting body 38 , as shown in FIG. 6 .
- the outer surface 160 is complimentary with the inner surface 96 of the fitting body 38 .
- the outer surface 160 is continuous about the rim 158 so that when the screen 26 is installed within the fitting 6 , debris traveling in direction 140 toward the screen 26 will be trapped upstream of the rim 158 and unable to pass beyond the rim 158 .
- the outer surface 160 may also be discontinuous about the rim 158 while still restricting debris from passing beyond the screen 26 .
- the rim 158 may include a slot formed in the outer surface 160 that is configured to engage a raised feature on the inner surface 54 of the fitting 6 .
- the components of the coupling 1 may have a cross-sectional configuration other than the substantially circular embodiment shown in FIG. 1 .
- the rim 158 of the associated screen 26 may also be rectangular so that the rim 158 will abut the inner surface 96 of the fitting body 38 .
- the screen element 162 may take other shapes, such as cubic or cylindrical, as appropriate for a desired application.
- the screen 26 has a frusto-conical screen element 162 that is wider at the downstream end 150 and narrower at the upstream end 152 .
- This configuration tends to direct debris toward downstream end 150 of the screen 26 where the debris accumulates adjacent the rim 158 and the inner surface 96 of the fitting body 38 .
- the upstream end 152 of the screen element 162 tends to remain unblocked during operation, which improves fluid flow through the coupling 1 .
- the screen 26 is shown having been installed in direction 164 into the fitting 6 .
- the downstream end 150 of the screen 26 is inserted through an opening 166 formed by the collar 4 and into the opening 120 of the shoulder element 40 .
- the ribs 148 are in close relation with the inner surface 54 of the fitting 6 , which limits movement of the screen 26 in directions that are transverse to the longitudinal axis of the fitting body 38 .
- the rim 158 abuts the stop flange 52 , which restricts movement of the screen 26 toward the second end 90 of the fitting body 38 .
- an upstream surface 168 that is level with or slightly down stream of an adjacent, annular surface 170 of the shoulder element 40 .
- the surface 170 extends radially outward from the opening 120 of the shoulder element 40 and along the outward flange 62 to form an interface with the sealing surface 60 of the pipe joint 2 .
- a water tight seal may be formed between the surface 170 and the sealing surface 60 of pipe joint 2 when the collar 4 connects the fitting 6 to the pipe joint 2 .
- the fitting 6 , collar 4 , and screen 26 are ready to be connected to the pipe joint 2 .
- the o-ring 50 is received within an annular recess in the outward flange 46 on the fitting body 38 .
- the opening 84 of the collar 4 is aligned with and passed over the first end 86 of the fitting body 38 before the shoulder element 40 is affixed to the first end 86 of the fitting body 38 .
- the fitting 6 is formed and the collar 4 is captivated thereon.
- the inward flange 64 of the collar 4 is positioned in overlapping relation with the outward flanges 46 , 62 along the longitudinal axis of the fitting 6 .
- the 8 also shows the plurality of pockets 30 that extend from the opening 120 of the shoulder element 40 longitudinally along the fitting 6 .
- the shoulder element 40 includes the annular channel 123 , which receives the o-ring 58 .
- the o-ring 58 provides a water tight seal between the fitting 6 and the pipe joint 2 .
- the screen 26 may be installed into the passage 24 defined by the fitting 6 .
- the transverse extensions 28 of the screen 26 are aligned with the pockets 30 before the downstream end 150 of the screen 26 is inserted into the passage 24 , with continued insertion of the screen 26 engaging the transverse extensions 28 within the pockets 30 .
- the rim 158 of the screen 26 seats against the stop flange 52 of the fitting 6 .
- the pipe joint 2 is ready to be connected to the fitting 6 via rotation of the collar 4 which engages the female threads 82 of the collar 4 with the male treads 36 of the pipe joint 2 .
- the screen element 162 forms a juncture 194 with the outer surface 160 of the rim 158 .
- This configuration tends to accumulate debris at the juncture 194 and restricts passage of the debris beyond the rim 158 of the screen 26 .
- a wider end 190 of the screen element 162 is positioned adjacent the juncture 194
- a narrower end 192 of the screen element 162 is positioned adjacent the upstream end 152 .
- the screen element 162 includes longitudinal members 196 and arcuate lateral member 198 , wherein the longitudinal members 196 extend from the downstream end 150 of the screen 26 to the upstream end 152 .
- the lateral numbers 198 extend around the circumference of the frusto-conical screen element 162 between the transverse extensions and are positioned radially outward of the longitudinal members 196 .
- the criss-cross overlapping configuration of the longitudinal members 196 and the lateral members 198 forms rectangular openings 200 that are sized appropriately for a particular application. For example, 0.0004 inches 2 is preferable to restrict small stones, rocks, and other debris from passing beyond the screen 26 and potentially damaging a downstream structure, such as a valve.
- the pipe joint 2 and the fitting 6 may be made from a PVC material, which permits PVC cement to be used to connect the pipe joint 2 and the fitting 6 to PVC pipes or other components of the irrigation system.
- the collar 4 and the screen 26 are both manufactured using a polyethylene material.
- the o-rings 50 , 58 may be made from a resilient material, such as Buna-N, nitrile, or urethane.
- Other materials may be used for the coupling 1 , although they are preferably chosen to provide strength and impact resistance through a wide range of environmental conditions. In some applications, it may even be desirable to utilize steel or a metallic alloy for one or more components of the coupling 1 .
- Irrigation system subassembly 300 includes an irrigation system component 302 having an upstream port 304 and a downstream port 306 .
- the irrigation system component 302 may be a number of different types of components, including but not limited to a valve, a generator, or a filter.
- An upstream fitting 308 is connected to the upstream port 304 , the fitting 308 being configured to connect to an upstream pipe joint 310 that is joined to an upstream pipe 312 .
- a downstream fitting 314 is connected to the downstream port 306 , the downstream fitting 314 being configured to connect to a downstream pipe joint 316 that is joined to a downstream pipe 318 .
- the upstream fitting 308 has a screen (not shown) that is similar to the screen 26 discussed above, while the downstream fitting 314 does not have a screen.
- the irrigation system component 302 may be readily connected or disconnected to the pipes 312 , 318 . Specifically, the component 302 is lowered in direction 324 until the fittings 308 , 314 are aligned with the respective pipe joints 312 , 316 . Next, the collars 320 , 322 are shifted in directions 326 , 328 toward the pipe joints 310 , 316 before being threadingly engaged thereto. Conversely, removal of the component 302 is readily accomplished by threadingly disengaging the collars 320 , 322 from the pipe joints 310 , 316 and shifting the collars 320 , 322 inward.
- the component 302 may be lifted upward and out of alignment with the pipes 312 , 318 . This configuration permits removal or installation of the component 302 without having to manipulate the pipes 312 , 318 , which is beneficial for installations where the pipes 312 , 318 are fixed.
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- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Joints Allowing Movement (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
A union coupling having a removable screen is disclosed. The union coupling includes a pipe joint, a fitting that receives the screen, and a collar which clamps the fitting to the pipe joint. In one form, the fitting has an inner surface that defines a passage through the fitting and a pocket formed in the inner surface. The screen has a transverse extension that is received at least in part in the pocket with engagement of the transverse extension and pocket restricting passage of the screen past a predetermined position in the passage. A union coupling having a fitting comprising a fitting body with an outward flange and a shoulder element with an outward flange is also provided. The shoulder element is connected to the fitting body to captivate a collar between the outward flanges of the fitting so that the collar does not become separated from the fitting body. A method of assembling a union coupling is also provided.
Description
- This application is a continuation of U.S. patent application Ser. No. 12/622,046, filed Nov. 19, 2009, which is incorporated herein by reference in its entirety.
- The field relates to pipe couplings used in irrigation and, more particularly, to pipe couplings having removable screens.
- Irrigation systems utilize a series of pipes or conduits for conveying water from a water source to a series or network of water emitters or sprinklers. Irrigation system components are typically installed and operate below ground level, which may cause rocks, dirt, and other debris to enter the irrigation system and travel along the pipes with the water flow. Contamination, particularly in the form of particulate matter, can impair the operation of components within the irrigation system. To protect a component, such as a valve, from particulate matter, some irrigation systems utilize a screen disposed at the inlet of the valve. However, a valve using such an approach suffers from a significant shortcoming in that a user must disconnect the valve from the upstream and downstream pipe in order to service the valve. Commonly, the pipes are threadingly engaged with the valve and must be rotated to disconnect the pipe from the valve. This operation may be difficult and time consuming if the valve and the upstream pipe are in narrow confines or are otherwise limited in their range of movement.
- One approach to creating a more easily serviceable connection between a pipe and a valve is to use a union coupling. A union coupling has a pair of fittings or joints that may connect to other irrigation system components, such as the pipe and the valve. The union coupling further comprises a collar that is rotated or otherwise manipulated to draw the fittings together and form a connection therebetween. One type of existing union coupling includes a fitting having an annular ridge extending around one end of the fitting to restrict the collar from sliding off of the fitting. However, the collar is free to slide off the other end of the fitting until that end is connected to the pipe or valve. This approach may be problematic during installation, as the fitting with the annular ridge can be accidently installed onto the pipe or valve without the collar. If pipe cement or other chemical bonding has been used, subsequent removal of the fitting from the pipe or valve may cause damage to the fitting and require replacement.
- Another shortcoming of existing union couplings is that they are often unable to withstand loads applied to the side of the manifold. In greater detail, these types of manifolds have an annular ridge to retain a collar on each outlet of the manifold with the collars being used to connect the respective outlet to a fitting or hose. Irrigation manifolds are assembled by passing a collar of the union coupling over the outlet and urging an inwardly projecting lip of the collar against the annular ridge of the manifold until it is forced beyond the ridge. Once the lip has been forced past the annular ridge, the interference between the lip and the annular ridge restricts the collar from falling off the manifold outlet. Because the annular ridge has to be small enough to permit the lip of the collar to snap beyond the annular ridge, the ability of the ridge to restrict the collar from falling off of the outlet is necessarily less than optimal. Accordingly, when a side load is applied to the manifold, the resulting bending moment between a manifold outlet and the corresponding fitting tends to cause the collar to snap past the annular ridge and off of the manifold outlet.
- Yet another disadvantage of existing union couplings is manifest in typical plumbing installations using polyvinyl chloride (PVC) pipes. Specifically, one common approach to installing a union coupling with PVC pipes involves using a series of fittings interconnected by short pieces of pipe. For example, if a PVC pipe is to be connected to a valve, an installer would use: 1) a slip fitting for connecting to the end of the PVC pipe; 2) a union coupling including two fittings and a collar; 3) a male threaded adapter for connecting to the valve inlet; 4) a short piece of PVC pipe to connect the slip fitting to the union coupling; and 5) a short piece of PVC pipe to connect the union coupling to the male threaded adapter. Although the series of fittings and PVC pipes would be relatively rigid once connected, the overall size of the installation is very large and labor-intensive to assemble. Further, it is problematic to keep all of the fittings and PVC piping on hand for what is essentially a custom installation for each valve.
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FIG. 1 is a perspective view of a union coupling; -
FIG. 2 is a cross-sectional perspective view of the union coupling ofFIG. 1 taken across line 2-2 inFIG. 1 ; -
FIG. 3 is a cross-sectional perspective view of a fitting body and a collar of the union coupling ofFIG. 2 ; -
FIG. 4 is a cross-sectional perspective view of the fitting body and the collar ofFIG. 3 in conjunction with a shoulder element of the union coupling; -
FIG. 5 is a cross-sectional perspective view similar toFIG. 4 with the shoulder element connected to the fitting body; -
FIG. 6 is a cross-sectional perspective view of the fitting body, shoulder element, and collar ofFIG. 5 , in conjunction with a screen of the union coupling; -
FIG. 7 is a cross-sectional perspective view similar toFIG. 6 with the screen installed within the fitting body and the shoulder element; -
FIG. 8 is an exploded perspective view of the union coupling ofFIG. 1 ; -
FIG. 9 is a perspective view of the screen of the union coupling ofFIG. 8 ; and -
FIG. 10 is a side elevational view of an irrigation system subassembly which includes an irrigation system component and a pair of union couplings. - A union coupling with a removable screen is provided that retains the screen in a user-serviceable portion of the coupling such that a user may readily access, clean, or replace the screen. The union coupling may be installed at any location within an irrigation system, though the union coupling is particularly well-suited for installation between a pipe and a valve or between two pipes. By one approach, the union coupling comprises a pipe joint, a collar, and a fitting, wherein the collar is configured to clamp the fitting to the pipe joint. The fitting has an inner surface that defines a passage and has a pocket formed in the inner surface. The fitting has an opening at one end thereof that opens into the passage and is sized to accept at least a portion of a screen. Specifically, the screen has a downstream portion that is inserted through the opening of the fitting and into the passage. The screen also has an upstream portion with a transverse extension, wherein the transverse extension is received in the pocket of the fitting. In this way, the engagement between the transverse extension of the screen and the pocket of the fitting restricts passage of the upstream portion of the screen beyond a predetermined position in the passage. This configuration permits a user to easily remove the screen from the fitting for cleaning by simply disconnecting one end of the fitting from the pipe joint and the other end of the fitting from the valve or pipe. In one form, the transverse extension of the screen comprises a tip portion that is received in the pocket, and a thin gripping portion that a user may conveniently grip to remove the screen from the fitting. Further, the engagement between the transverse extension and the pocket requires the screen to be installed in the fitting in a particular orientation which ensures that the screen is properly installed within the union coupling.
- In another respect, the union coupling comprises a pipe joint, a collar, and a fitting comprising a fitting body and a shoulder element. The fitting body has a first end that is configured to connect to the pipe joint. To assemble the union coupling, the collar is passed over the first end of the fitting body. The shoulder element is then connected to the fitting body which captivates the collar on the fitting body. With the shoulder element connected to the first end of the fitting body, the fitting body and the shoulder element have outward flange portions that restrain an inward flange of the collar therebetween. Further, connecting the shoulder element to the fitting body after the collar has passed over the first end of the fitting body permits the outward flange portion of the shoulder element to be made sufficiently large to restrict movement of the collar. In contrast to prior irrigation manifolds, the outward flange portion of the shoulder element may be larger than the traditional annular ridge because the inward flange portion of the collar does not need to snap past the outward flange portion of the shoulder element. Further, a larger shoulder element also has a larger bearing surface for engaging a sealing surface of the pipe joint which permits a more stable interface between the fitting and the pipe joint than conventional union couplings. As is apparent, this approach resists pulling apart of the fitting and pipe joint such that the union coupling may better resist side loading than traditional configurations.
- By another approach, the union coupling has a fitting with an inner surface that defines a passage through the fitting. The fitting has a recessed support formed in the inner surface and at least one stop that extends from the inner surface and is spaced from the recessed support along the length of the fitting. The recessed support extends transversely to the length of the fitting and outwardly from the inner surface thereof. A screen is received within the fitting and includes an upstream end with a transverse extension that seats against the recessed support. Further, a downstream end of the screen includes a rim that rests against the stop. This way, the recessed support and the stop brace the screen against the flow of the water debris within the water flow. In one form, the rim of the screen has a continuous outer surface that is flush with the inner surface of the fitting when the screen is received within the fitting. The close fit between the rim of the screen and the inner surface of the fitting resists the passage of waterborne particles beyond the screen. Additionally, removing the screen from the fitting causes the screen rim to slide along the inner surface of the fitting and pull debris deposited on the inner surface of the fitting out of the fitting.
- Turning to the figures,
FIGS. 1-9 illustrate an embodiment of aunion coupling 1 comprising apipe joint 2, acollar 4, and afitting 6. Thecoupling 1 may be installed between lengths of pipe, as well as between a pipe and a valve. As shown inFIG. 1 , thefitting 6 has a threadedportion 8 that is connected to the inlet of a valve (not shown). This way, water will flow in the direction ofarrow 10 into the pipe joint 2 through thefitting 6 and eventually into the valve. Thepipe joint 2 has awall 12 that defines apassage 14 for receiving an end of a pipe (not shown) and aninner surface 16 configured to fit snugly with the end of the pipe. The pipe joint 2 also has a threadedportion 18 at the end of the pipe joint 2 adjacent thefitting 6. The threadedportion 18 of thepipe joint 2 is configured to interface with threads (seeFIG. 2 ) on an interior surface of thecollar 4. The engagement of the threads of thecollar 4 with the threadedportion 18 of thepipe joint 2 is configured such that rotating thecollar 4 draws thefitting 6 and the pipe joint 2 into abutting relation and clamps the fitting 6 against thepipe joint 2. To improve the ease of installation of theunion coupling 1, thecollar 4 may include protuberances 20 positioned around the circumference of thecollar 4 that assist with manual manipulation of thecollar 4. Additionally, thefitting 6 may includeflat surfaces 22 that are arranged around the circumference of thefitting 6 and interface with a wrench so that fitting 6 may be firmly connected to the downstream valve or pipe. - As shown in
FIG. 2 , thefitting 6 includes apassage 24 that is aligned with thepassage 14 in the pipe joint 2 when thepipe joint 2 is connected to thefitting 6 via thecollar 4. Ascreen 26 is positioned within thefitting 6 and in the path of water flow shown bydirection arrow 10. As will be discussed in greater detail below, thescreen 26 includes fins ortransverse extensions 28 that are each held within a recess orpocket 30 by the compression of anannular wall 32 of thepipe joint 2. In one approach, thescreen 26 is inserted into thefitting 6 and theannular wall 32 of thepipe joint 2 is pressed against an upstream facingsurface 34 of the fitting 6 before thecollar 4 is rotatably engaged ontomale threads 36 located on thepipe joint 2. Thefitting 6 may have a two-part construction comprising afitting body 38 and ashoulder element 40 that are connected at a fixed joint 42, preferably by a frictional spin weld. In one approach, the spin weld is produced by pressing theshoulder element 40 against thefitting body 38 and rotating theshoulder element 40 until the friction therebetween generates localized heating. Once the heating reaches a sufficient temperature, the materials of theshoulder element 40 and thefitting body 38 melt together. The rotation is stopped and thefitting 6 is allowed to cool. Alternatively, theshoulder element 40 may be connected to thefitting body 38 via a chemical weld or mechanical means, such as fasteners which tightly clamp theshoulder element 40 to thefitting body 38. - In one form, the
fitting body 38 has anannular wall 44 that partially defines thepassage 24. Thewall 44 includes anoutward flange 46 that projects radially outward from thewall 44. Theoutward flange 46 defines anannular recess 48 that faces downstream and is configured to receive a seal or o-ring 50. The o-ring 50 provides a water tight seal with the inlet of the valve. Thefitting body 38 also includes an inwardly directed flange or stopflange 52 that is spaced from thepockets 30 of thefitting 6 along the length of thefitting 6. The stop flange 52 projects radially inward from theinner surface 54 of thefitting 6. In the embodiment shown, theflange 52 comprises a plurality of ledges or stops having surfaces which face upstream and abut an end of thescreen 26 to brace thescreen 26 against the flow of water and debris. The stops are shown as being integrally formed with thefitting body 38, though they may be separate structures that are connected to thefitting body 38. Alternatively, thestop flange 52 may be a continuous radially projecting element to support thescreen 26. - The upstream facing
surface 34 of thefitting 6 defines arecess 56 configured to receive an o-ring 58. The o-ring 58 forms a water-tight seal between thesurface 34 of thefitting 6 and a downstream facingend surface 60 of thepipe joint 2. Rotation of thecollar 4 when threaded onto themale threads 36 of thepipe joint 2 tends to compress the o-ring 58 between thesurfaces shoulder element 40 also includes anoutward flange 62 that extends radially outward from thefitting 6. Theoutward flange 62 of theshoulder element 40 and theoutward flange 46 of thefitting body 38 restrain movement of aninward flange 64 of thecollar 4 along thefitting 6. With theinward flange 64 of thecollar 4 between theoutward flanges collar 4 is captivated on the fitting 6 such that thecollar 4 may only translate along the length of the fitting 6 between theflanges collar 4 may freely rotate about a longitudinal axis of thefitting 6, as represented by line A-A inFIG. 2 . - With reference to
FIGS. 3-7 , there is illustrated one approach to assembling thecoupling 1. Specifically,FIG. 3 shows thecollar 4 being positioned on thefitting body 38 before theshoulder element 40 is connected to thefitting body 38. Thecollar 4 has awall 80 that includesfemale threads 82 on aninner surface 83 thereof which are configured to engage themale threads 36 on thepipe joint 2. Theinward flange 64 of thecollar 4 defines anopening 84 that is sized to pass over afirst end 86 of thefitting body 38 indirection 88. Because theshoulder element 40 is not yet attached to thefitting body 38, thecollar 4 is free to be removed from thefirst end 86 of thefitting body 38. Opposite thefirst end 86 of thefitting body 38 is asecond end 90 that includes the threadedportion 8. Theoutward flange 46 is positioned intermediate thefirst end 86 and thesecond end 90 of thefitting body 38. Theoutward flange 46 resists movement of theinward flange 64 of thecollar 4 along thefitting body 38 toward thesecond end 90 of thefitting body 38. - The
first end 86 of thefitting body 38 is configured to connect to theshoulder element 40. Specifically,FIG. 3 illustrates a series of concentric,annular lips 92A-92C disposed at thefirst end 86 offitting body 38 andgrooves 94A and 94B concentrically disposed between thelips 94A-94C. In one embodiment, theshoulder element 40 is connected to thefitting body 38 via a spin weld. The spin welding process deformslips 92A-92C and welds thelips 92A-92C to adjacent structures of theshoulder element 40.FIG. 3 also illustrates aninner surface 96 of thefitting body 38 that defines apassage 98 extending along the length of thefitting body 38. Anopening 100 opens into thepassage 98 at thefirst end 86 of thefitting body 38, while at thesecond end 90, thestop flange 52 projects radially inward from theinner surface 96. As shown, thestop flange 52 comprises a series of equally spaced ledges or stops 102A-102E extending radially inward from theinner surface 96. - Once the
opening 84 of thecollar 4 has passed over onefirst end 86 of thefitting body 38, theshoulder element 40 may be connected to thefitting body 38 indirection 110, as shown inFIG. 4 . Theshoulder element 40 has concentric,annular lips 112A and 112B configured to mate with lips 92B and 92C, respectively, of thefitting body 38, while radiallyinner neck 114 mates with thelip 92A. Adjacent thelips 112A, 112B of theshoulder element 40 are concentrically disposedgrooves 116A and 116B, thegrooves 116A, 116B being aligned withgrooves 94A and 94B, respectively, of thefitting body 38 when theshoulder element 40 is connected to thefitting body 38. The grooves 116, 94 form annular pockets 117A, 117B that extend around thewall 44 of thefitting body 38 at the first end 86 (seeFIG. 6 ). In one form, the pockets 117A, 117B defined by the grooves 94, 116 permit the lips 92, 112, andneck 114 to deform during the spin welding process. - Returning to
FIG. 4 , theshoulder element 40 includes a radiallyinner surface 118 that defines anopening 120. With theshoulder element 40 connected to thefitting body 38, theopening 120 of theshoulder element 40 is aligned with theopening 100 of thefitting body 38 such that the radiallyinner surface 118 of theshoulder element 40 is flush with theinner surface 96 of thefitting body 38. In this way, thescreen 26 may be inserted into thepassage 24 of thefitting 6 without snagging on the radiallyinner surface 118 of theshoulder element 40 or theinner surface 96 of thefitting body 38. Theshoulder element 40 may also include a series ofpockets 30 disposed evenly around the radiallyinner surface 118. Eachpocket 30 includes a recessed support orseating surface 122 that extends perpendicularly to theinner surface 118 of theshoulder element 40. Theseating surface 122 is configured to restrict movement of thetransverse extensions 28 of thescreen 26 from traveling toward thesecond end 90 of thefitting body 38. Alternative embodiments of theseating surface 122 may include a variety of configurations for theseating surface 122. For example, theseating surface 122 may be inclined at an angle relative to theinner surface 118 of theshoulder element 40. Theshoulder element 40 also may include anannular channel 123 that extends around theshoulder element 40 and receives the o-ring 58. The o-ring 58 is configured to form a water-tight connection with theannular wall 32 of the pipe joint 2 when thecoupling 1 is fully assembled. - In
FIG. 5 , theshoulder element 40 is connected to thefitting body 38 to form thefitting 6. Theinward flange 64 of thecollar 4 is captured between theoutward flange 46 of thefitting body 38 and theoutward flange 62 of theshoulder element 40. In this configuration, theoutward flange 46 and theoutward flange 62 are in overlapping relation with theinward flange 64 of thecollar 4 along the longitudinal axis of thefitting 6. Aninterface 126 of thefitting 6 provides a smooth transition between theinner surface 118 of theshoulder element 40 and theinner surface 96 of thescreen body 38. In this way, theinner surface 54 of thefitting 6 defines apassage 24 for receiving thescreen 26. - As shown in
FIG. 6 , once theshoulder element 40 has been connected to thefitting body 38, thefitting 6 and thecollar 4 are effectively a single piece that may be handled and installed onto a valve or pipe without thecollar 4 falling off or being incorrectly installed. With theshoulder element 40 connected to thefitting body 38, theopening 120 of theshoulder element 40 opens into thepassage 24 of the fitting 6 such that thescreen 26 may be inserted indirection 140 into thepassage 24 of thefitting 6. Thescreen 26 has one or moretransverse extensions 28 that each include atip 142 at the outermost portion of thetransverse extension 28 and agripping portion 144 that extends from amid point 146 of thescreen 26 to thetip 142. The grippingportion 144 is relatively thin and permits a user to grab the grippingportion 144 between the user's thumb and index finger or with a tool, such as a pair of pliers. - Each
transverse extension 28 also includes arib 148 that extends between adownstream end 150 of thescreen 26 and anupstream end 152 of thescreen 26. In the illustrated embodiment, thetransverse extensions 28 are organized in a cross configuration so that one pair oftransverse extensions 28 lies along a plane that is perpendicular to a plane defined by the other pair oftransverse extensions 28. Thetransverse extensions 28 extend outward beyond an outer profile orouter surface 160 of the screen which permits thescreen 26 to be clamped between thepipe joint 2 and thefitting 6. Further, a pair ofoutermost surfaces tip 142A and tip 142C. The narrower portions of thescreen 26 permit thedownstream end 150 of thescreen 26 to be inserted into thepassage 24 with theoutermost surfaces inner surface 96 of thefitting body 38. Conversely, thetips 142 extend outward beyond anouter surface 160 of thescreen 26 which prevents over-insertion of thescreen 26 in thepassage 24 indirection 140. Specifically, the engagement of thetips 142 in thepockets 30 restricts movement of thescreen 26 and, in combination with thestop flange 52, braces thescreen 26 against the water flow and debris suspended in the water that may impact against thescreen 26 and force thescreen 26 toward thesecond end 90 of thefitting body 38. - At the
downstream end 150, thescreen 26 has aseating rim 158 that seats against thestop flange 52 and has a shape that is similar to the contour of theinner surface 96 of thefitting body 38, as shown inFIG. 6 . In this manner, theouter surface 160 is complimentary with theinner surface 96 of thefitting body 38. Theouter surface 160 is continuous about therim 158 so that when thescreen 26 is installed within thefitting 6, debris traveling indirection 140 toward thescreen 26 will be trapped upstream of therim 158 and unable to pass beyond therim 158. Theouter surface 160, however, may also be discontinuous about therim 158 while still restricting debris from passing beyond thescreen 26. For example, therim 158 may include a slot formed in theouter surface 160 that is configured to engage a raised feature on theinner surface 54 of thefitting 6. - The components of the
coupling 1 may have a cross-sectional configuration other than the substantially circular embodiment shown inFIG. 1 . For example, if thefitting 6 has a rectangular cross section, then therim 158 of the associatedscreen 26 may also be rectangular so that therim 158 will abut theinner surface 96 of thefitting body 38. Like thefitting 6 and thescreen 26, thescreen element 162 may take other shapes, such as cubic or cylindrical, as appropriate for a desired application. In the embodiment ofFIG. 6 , thescreen 26 has a frusto-conical screen element 162 that is wider at thedownstream end 150 and narrower at theupstream end 152. This configuration tends to direct debris towarddownstream end 150 of thescreen 26 where the debris accumulates adjacent therim 158 and theinner surface 96 of thefitting body 38. By directing the debris downstream, theupstream end 152 of thescreen element 162 tends to remain unblocked during operation, which improves fluid flow through thecoupling 1. - Turning to
FIG. 7 , thescreen 26 is shown having been installed indirection 164 into thefitting 6. Thedownstream end 150 of thescreen 26 is inserted through anopening 166 formed by thecollar 4 and into theopening 120 of theshoulder element 40. With thescreen 26 received within thefitting 6, theribs 148 are in close relation with theinner surface 54 of thefitting 6, which limits movement of thescreen 26 in directions that are transverse to the longitudinal axis of thefitting body 38. Therim 158 abuts thestop flange 52, which restricts movement of thescreen 26 toward thesecond end 90 of thefitting body 38. At theupstream end 152 of thescreen 26, there is anupstream surface 168 that is level with or slightly down stream of an adjacent,annular surface 170 of theshoulder element 40. Thesurface 170 extends radially outward from theopening 120 of theshoulder element 40 and along theoutward flange 62 to form an interface with the sealingsurface 60 of thepipe joint 2. By positioning theupstream surface 168 of thescreen 26 level with or slightly downstream of thesurface 170 of theshoulder element 40, a water tight seal may be formed between thesurface 170 and the sealingsurface 60 of pipe joint 2 when thecollar 4 connects the fitting 6 to thepipe joint 2. As shown inFIG. 7 , thefitting 6,collar 4, andscreen 26 are ready to be connected to thepipe joint 2. - With reference to
FIG. 8 , the o-ring 50 is received within an annular recess in theoutward flange 46 on thefitting body 38. Then, theopening 84 of thecollar 4 is aligned with and passed over thefirst end 86 of thefitting body 38 before theshoulder element 40 is affixed to thefirst end 86 of thefitting body 38. By connecting theshoulder element 40 to thefitting body 38, thefitting 6 is formed and thecollar 4 is captivated thereon. Specifically, theinward flange 64 of thecollar 4 is positioned in overlapping relation with theoutward flanges fitting 6.FIG. 8 also shows the plurality ofpockets 30 that extend from theopening 120 of theshoulder element 40 longitudinally along thefitting 6. Theshoulder element 40 includes theannular channel 123, which receives the o-ring 58. The o-ring 58 provides a water tight seal between the fitting 6 and thepipe joint 2. - Once the o-
ring 58 has been installed in thechannel 123 of theshoulder element 40, thescreen 26 may be installed into thepassage 24 defined by thefitting 6. Thetransverse extensions 28 of thescreen 26 are aligned with thepockets 30 before thedownstream end 150 of thescreen 26 is inserted into thepassage 24, with continued insertion of thescreen 26 engaging thetransverse extensions 28 within thepockets 30. As thetransverse extensions 28 engage thepockets 30, therim 158 of thescreen 26 seats against thestop flange 52 of thefitting 6. With thescreen 26 received within thefitting 6, thepipe joint 2 is ready to be connected to thefitting 6 via rotation of thecollar 4 which engages thefemale threads 82 of thecollar 4 with the male treads 36 of thepipe joint 2. Continued rotation of thecollar 4 draws theinward flange 64 of the collar against theoutward flange 62 of theshoulder element 40 which, in turn, draws the confrontingsurface 170 of theshoulder element 40 against the pipe joint 2 to securely fasten the fitting 6 to thepipe joint 2. This rigidly locks thetransverse extensions 28 of thescreen 26 within thepockets 30 formed in theshoulder element 40. Additionally, the engagement of the fitting 6 against the pipe joint 2 presses therim 158 of thescreen 26 against thestop flange 52 of thefitting body 38. In this form, theunion coupling 1 is assembled into an interconnected assembly that is ready to be transported or installed as desired. - With reference to
FIG. 9 , thescreen element 162 forms ajuncture 194 with theouter surface 160 of therim 158. This configuration tends to accumulate debris at thejuncture 194 and restricts passage of the debris beyond therim 158 of thescreen 26. Awider end 190 of thescreen element 162 is positioned adjacent thejuncture 194, while anarrower end 192 of thescreen element 162 is positioned adjacent theupstream end 152. Thescreen element 162 includeslongitudinal members 196 and arcuatelateral member 198, wherein thelongitudinal members 196 extend from thedownstream end 150 of thescreen 26 to theupstream end 152. Conversely, thelateral numbers 198 extend around the circumference of the frusto-conical screen element 162 between the transverse extensions and are positioned radially outward of thelongitudinal members 196. The criss-cross overlapping configuration of thelongitudinal members 196 and thelateral members 198 formsrectangular openings 200 that are sized appropriately for a particular application. For example, 0.0004 inches2 is preferable to restrict small stones, rocks, and other debris from passing beyond thescreen 26 and potentially damaging a downstream structure, such as a valve. - With regard to the materials of
coupling 1, thepipe joint 2 and thefitting 6 may be made from a PVC material, which permits PVC cement to be used to connect thepipe joint 2 and the fitting 6 to PVC pipes or other components of the irrigation system. In one form, thecollar 4 and thescreen 26 are both manufactured using a polyethylene material. To provide a water tight seal, the o-rings 50, 58 may be made from a resilient material, such as Buna-N, nitrile, or urethane. Other materials may be used for thecoupling 1, although they are preferably chosen to provide strength and impact resistance through a wide range of environmental conditions. In some applications, it may even be desirable to utilize steel or a metallic alloy for one or more components of thecoupling 1. - Turning to
FIG. 10 , anirrigation system subassembly 300 is shown.Irrigation system subassembly 300 includes anirrigation system component 302 having anupstream port 304 and adownstream port 306. Theirrigation system component 302 may be a number of different types of components, including but not limited to a valve, a generator, or a filter. Anupstream fitting 308 is connected to theupstream port 304, the fitting 308 being configured to connect to an upstream pipe joint 310 that is joined to anupstream pipe 312. Similarly, adownstream fitting 314 is connected to thedownstream port 306, thedownstream fitting 314 being configured to connect to a downstream pipe joint 316 that is joined to adownstream pipe 318. In one embodiment, theupstream fitting 308 has a screen (not shown) that is similar to thescreen 26 discussed above, while thedownstream fitting 314 does not have a screen. - By way of a pair of
rotatable collars irrigation system component 302 may be readily connected or disconnected to thepipes component 302 is lowered in direction 324 until thefittings respective pipe joints collars directions component 302 is readily accomplished by threadingly disengaging thecollars collars component 302 may be lifted upward and out of alignment with thepipes component 302 without having to manipulate thepipes pipes - It will be understood that various changes in the details, materials, and arrangements of parts and components which have been herein described and illustrated in order to explain the nature of the union coupling with removable screen may be made by those skilled in the art within the principle and scope of the union coupling with removable screen as expressed in the appended claims. Furthermore, while various features have been described with regard to a particular embodiment or a particular approach, it will be appreciated that features described for one embodiment also may be incorporated with the other described embodiments.
Claims (10)
1. An irrigation system subassembly comprising:
an irrigation system component having an upstream port and a downstream port;
an union coupling connected to the upstream port of the irrigation system component, the upstream union coupling comprising an upstream fitting having a pair of opposed ends with one end configured to connect to an upstream pipe joint and a first wall extending between the opposed ends of the upstream fitting, a first passage defined by the first wall and extending between the opposed ends of the upstream fitting, a first outward flange extending from the first wall intermediate the opposed ends of the upstream fitting, an upstream collar having an upstream collar flange portion that defines a first opening, the first opening being sized to pass over the first wall at the one end of the upstream fitting, and a second outward flange being connected to the one end of the upstream fitting, the second outward flange being sized to restrict the upstream collar flange portion from passing beyond the second outward flange, the first and second outward flanges captivating the upstream collar on the upstream fitting; and
an union coupling connected to the downstream port of the irrigation system component, the downstream union coupling comprising a downstream fitting having opposed ends with one end configured to connect to the downstream pipe joint and a second wall extending between the opposed ends of the downstream fitting, a second passage defined by the second wall and extending between the opposed ends of the downstream fitting, a third outward flange extending from the second wall intermediate the opposed ends of the downstream fitting, a downstream collar having a downstream collar flange portion that defines a second opening, the second opening being sized to pass over the second wall at the one end of the downstream fitting, and a fourth outward flange being connected to the one end of the downstream fitting, the fourth outward flange being sized to restrict the downstream collar flange portion from passing beyond the fourth outward flange, the third and fourth outward flanges captivating the downstream collar on the downstream fitting.
2. The irrigation system subassembly of claim 1 further comprising a screen disposed at least in part in the first passage of the upstream union coupling.
3. The irrigation system subassembly of claim 1 wherein the irrigation system component is selected from the group consisting of a valve, a generator, and a filter.
4. The irrigation system subassembly of claim 1 wherein at least one of the second outward flange and the fourth outward flange is connected to the respective fitting via a spin weld.
5. The irrigation system subassembly of claim 1 wherein the upstream union coupling includes the upstream pipe joint and the downstream union coupling includes the downstream pipe joint.
6. A method of assembling a union coupling, the method comprising:
aligning an opening of a collar with an end of a fitting body portion;
passing the opening of the collar over the end of the body portion;
connecting a fitting shoulder portion to the end of the body portion, which positions an inward flange portion of the collar in axial overlapping relation with an outward flange portion of the body portion and an outward flange portion of the shoulder portion;
7. The method of claim 6 further comprising inserting a downstream portion of a screen into a passage of the body portion defined by a wall of the body portion.
8. The method of claim 7 further comprising seating a rim of the screen against a stop extending inwardly from the wall of the body portion.
9. The method of claim 6 further comprising aligning a plurality of transverse extensions of a screen with recesses in the shoulder portion and inserting the plurality of transverse extensions of the screen into the recesses of the shoulder portion.
10. The method of claim 6 further comprising mating threads on the collar with threads on a pipe joint and rotating the collar to draw the shoulder portion and the pipe joint into abutting relation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/012,647 US20140001744A1 (en) | 2009-11-19 | 2013-08-28 | Union Coupling With Removable Screen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US12/622,046 US8534467B2 (en) | 2009-11-19 | 2009-11-19 | Union coupling with removable screen |
US14/012,647 US20140001744A1 (en) | 2009-11-19 | 2013-08-28 | Union Coupling With Removable Screen |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/622,046 Continuation US8534467B2 (en) | 2009-11-19 | 2009-11-19 | Union coupling with removable screen |
Publications (1)
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Family Applications (2)
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US12/622,046 Active 2031-12-23 US8534467B2 (en) | 2009-11-19 | 2009-11-19 | Union coupling with removable screen |
US14/012,647 Abandoned US20140001744A1 (en) | 2009-11-19 | 2013-08-28 | Union Coupling With Removable Screen |
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US12/622,046 Active 2031-12-23 US8534467B2 (en) | 2009-11-19 | 2009-11-19 | Union coupling with removable screen |
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Also Published As
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US8534467B2 (en) | 2013-09-17 |
US20110114195A1 (en) | 2011-05-19 |
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Owner name: RAIN BIRD CORPORATION, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAAS, CLINT R.;REICHARD, JASON A.;REEL/FRAME:032026/0058 Effective date: 20100217 |
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