US2549218A - Pump - Google Patents

Description

April 17, 1951 R. H. MCBEAN 2,549,218

PUMP

Filed Aug. l, 1945 5 Sheets-Sheet V1 92m, y 7mm,

April 17, 1951 R H, MCBEAN 2,549,218

PUMP

Filed Aug. 1, 1945 5 sheets-sheet 2 IN VEN TOR. ,7 fone/P r hwctA/v a @m2/zz Erme/vsp April 17, 1951 R H MGBEAN 2,549,218

PUMP

Filed Aug. l, 1945 vE5 Sheets-Sheet 3 [//l/ llll,4 l ms? l0 lll/'lrr/vl/ f la' '9 n L 20a. \\\\\\\\\aZ/ E l 2 /l/lJ// r g 7, E Z@ s A 4 f INVENTOR. o 7L Bj/Pof/er l/.Mfaw

Friar/vm Patented Apr. 17, 1951 PUMP Robert H. McBean, Fairview Village, Ohio, as-

signor to The Deming Company, Salem, Ohio,

a corporation of Ohio Application August 1, 1945, Serial N0. 608,114

7 Claims.

1 This invention relates to a pumping mechanism of the jet type wherein there is a pressure pump and a jet to aid in the delivery of liquid thereto, the jet being energized by liquid under pressure delivered thereto by the pressure pump.

In the case of a shallow'well pump the jet is located within the pump casing itself. In the case of a deep well pump it is located in the well and supplied by a suitable conduit leading downwardly from the pump above ground. v

The primary object of the invention is to provide simple and effective means for readily converting these pumps from the shall well type to the deep well type. More particularly, it is an object of the invention to provide jet mechanism for the shallow well pump interchangeable with means to supply a pressure jet in the well, each of such interchangeable devices being adapted to be mounted in the pump casing.

It is a further object to provide each of said interchangeable devices with means for attaching the suction pipe thereto in communication with a suitable'internal conduit which may carry the liquid for the pump, each of said devices having also another conduit adapted. to conduct l liquid under pressure for operating the corresponding jet.

It is a still further object of the invention to provide a jet nozzle, a jet tube, and means providing a passageway to the nozzle, all mounted as a unit in the base of the pump casing beneath the pressure pump and adapted to be withdrawn as a unit therefrom and replaced by means mounted in the same opening to connect the same pressure chamber in the pump with a pressure conduit adapted to lead to a jet located in the well when the conversion isto be made to the deep well type of pump.

My invention is hereinafter more fully described in connection with a preferred embodiment thereof illustrated in the drawings, the essential novel features being summarized in the claims.

In the drawings, Fig. 1 is an elevation partly in section and partly broken away of my pump,

:arranged for shallow well operation and associated with a pressure tank and suitable controlling devices to constitute a water system;

Y Fig. 2 is a sectional side elevation of the shallow well pump; Fig. 3 is a sectional elevation, partly broken away, of my pump equipped for operation as a deep well pump in a water system, the pressure tank and the controls shown in Fig. 1 being applicable toV this figure but omitted for simplicity; Fig. 4 is a vertical section of the lower is a section of a device popularly known as a Brady Air Control for supplying air to the pressure tank and maintaining it at a definite pressure, the control being shown connected as in Fig. 1; Fig. 7 is a horizontal section through the lower portion of the pump when equipped Vas ashallow well pump, this view being in section on the plane indicated by the line 1 1 in` Fig. 2j Fig. 8 is a similar view showing the pump equipped for a deep well operation, this view being in section on the plane indicated by the line i--B on Fig. 4; Fig. 9 is a detail in vertical section through the conduit to the shallow, well jet nozzle, the plane of the section being indicated by the line 9 9 on Figs. 2 and 7.; Figs. 10 and 11 are details in section of the deep well installation, the planes of the sections being indicated by the correspondingly numbered lines on Figs. 4 and 8.

Briey, in Fig. 1, I0 indicates the casing or bare portion of my pump carrying a suitable pressure pump as hereinafter described andhav-I ing above it a casing l! housing a drivingl motor, not shown. The casingv Il is `supported by. an open frame I3 which rests on top of thecasing It and allows access to a coupling between the motor and pump. Leading outwardly and downwardly from the base portion of the pump is a suction pipe 2i), shown as terminating in a strainer and check unit 2| in a suitable: source of liquid supply. Extending from the topregion of the casing Il) is a delivery pipe 3l! which leads` to a pressure tank 4D which is the service tank of a water system. 5|) indicates a pressure operated electric switch for controlling the motor and te the Brady air control, which in effect is a local automatic pump operated by the force in the suction pipe through a connecting pipe Ely and serving to force air into. the pressure tank as needed to maintain a predetermined pressure therein.

The above Vdescription of the external parts applies also to the deep well installation of Fig. 3, except that the suction pipe 20a is connectedat f its lower end to a jet housing 23 the lower end of which is in communication with the strainer and check valve unit 2|.

a flaring jet tube 25, communicating with the `lower end of the suction pipe 20a. Ihe jet nozzle is supplied by liquid under pressure througha; drive pipe 28 in communication with the pump.: and leading downwardly to an elbowfpassagef in,y

the jet housing terminating in the nozzle 24.

In the jet housing 23, is an upwardly facing nozzle 24 discharging into tions from the casing to the suction 20d and the drive pipe 2.8 in Fig. 3, all of which will be apparent from the following description.

Referring now to Fig. 2, it Will be understood that the motor in the upper casing Il has a vertical shaft 10, the lower end of which is connected by a. coupling 1| to a shaft i2 of the pressure pump. As shown, this pump comprises a centrifugal impeller 'I4 in a-suitable volute `casing 16, '11. The edge of the impeller 18 is on its underside at the center, and the liquid there received is discharged outwardly and upwardly into an annular chamber A in the casing i9.

The impeller 14 is shown as having a bearing in a sleeve .19 carried by .a transverse partition 1'6 Ain the pump casing member I9. Surrounding the sleeve T9 is the lower portion l1 of the impeller housing. `The upper member 16 of this housing is shownas .an integral part of the frame-member -I3`arnicarried by a bottom portion l1 thereof, which Ahas a tubular portion I8 extending downwardly to the housing portion l5. The tubular portion is shown as carrying a suitable internal bearing for the shaft l2.

'The internal pump construction described is intended to be illustrative of any rotary or cen- .of the thimble.

trifugal pump on .a 'vertical shaft receiving its y supply 'from a downwardly open eye 'I8 .and discharging into an internal still'ing chamber A within 'thercasing, the stilling chamber being above the pump. From the top portion of lthe s'tilling chamber a suitable orifice indicated by the dotted circle 31 in Fig. `2 leads to the discharge pipe 30. f

lThe 'bottom f2 .of the casing. and .the partition vIt are connected .by arcuate walls to form horizontal cylindrical barrel 89 which is closed at the outer end as shown `at '8l and open at the inner end 82 `vvhengneither the shallow Well ,jet northe connection to the deep well jet is mounted inthe casing. This demounted condition is shown* in lig` 5, y at which time the open end of the barrel 80 is Vin communication with a base c'hamber'B which is in open Vcommunication with the stilling chamber A. The barrel 80 communicates intermediately with the yeye i8 of the im- -pe'ller and 'is equally applicable to shallow well and deep VWell constructions.

I will'n'ow describe the jet unit which coacts with the casing member In and with the barrel 80 to convey liquid from the suction pipe 29 to the eye ofthe impeller and boost Vthe flow by a through the flange and through an interposedV gasket 96 into threaded recesses 91 (Fig. 5) in the casing.V At its inner edgethe thimble has aniannular shoulder '92 bearing against the yend of the barrel i8'!) with *an interposed. gasket 93. The thimble also preferably has .a slight extension beyond the gasket seatV closely vfitting the interior'of the barrel 80.. Inthe interior of the thim-bjle the material is formed .into an .integral elbow 98 which carries a vpassageway .99 leading from the `base chamber .Binwardly and then axially tothe nozzle, as shown inlig..` 'L

manner is preferably carried by the jet tube `I l0.

As shown the jet tube has the usual internal bore of an intermediatev comparately cylindrical portion H2, a flaring portion H3 leading thereto and a Haring portion HA leading therefrom. The exterior of the tube is preferably threaded as shown at H5 and screws snugly into the end The jet tube is provided with an extension H6 which carries the jet nozzle 100. This extension surrounds the nozzle but has lateral openings III into it opposite the side portion of the nozzle and.v adjacent .the flaring opening H3 lof the Vjet tube. The nozzle is preferably forced tightly into the extension and the end of the extension bears snugly against the end of the elbow .98 as Yshown in Fig. 7.

When the jet unit has been installed as .shown in Figs. 2 and 7, .and the pump filled with water is started, such Water cornes `by .suction up the pipe 20 Yand `around the exterior of the jet tube extension, thence through the passageways H1 and thence through the jetrtube. It thus comes against aj Wall carried by theV casing and is diverted around the jet tube and passes into the The'wall of `the casing is shown with an annular curved recess -l I9 tol reduce the friction as the water returns the direction from the central jet tube bore toV the 'annular space about it. It may 4be convenient in manufacture to make the end wall opposite f it is forced under pressure upwardly to chamberV A. Here the air naturally rises Yto the top of the chamber and lis Vdelivered with the discharged water yto the pressure tank all while :air-free water from the lower Yportion of the chamber passes downwardly into the chamber B. As `this through the 'elbow vof the 'thimble and thence A Water is under pump jpressure `some oi it passes into the the znozzle |09. This makes a vigorous jet passing axially into the` jet tube and vthus boosting' the suction which also flows into the tube and thence to thefimpeller and stilling chamber. Y v i.

The shallow well jet pump above `described may be very readily converted into a deep `well 1ct pump by the mere ,removalof the jet *unit comprising the thimble, nozzle and tnbeand the substitution therefor of the connecting device shown at v[2li in Figs. 4, 8, 10 and 11. This Yconnecting device forms the means for `rconnecting the suction .pipe Vlim ywith the .suctionside `of the pump and the drive pipe .'28 with thepressure side. It

comprises a barrel I29- adapted to occupy thcLV wardly and diverges laterally in communication with the chamber B.

The barrel has an externally cylindrical portion |2l, the outside diameter of which is the same as the corresponding diameter of the thimble 95. It thus nts snugly in the opening 85. The inner end of the cylindrical portion having an annular seat 23 which bears against the end of the casing barrel 80 through an interposed gasket |24. The innermost portion of the barrel is preferably a small cylindrical flange extending into the interior of the barrel 80.

The barrel |20 is divided by means of an internal septum |25 which connects with one portion of the barrel wall adjacent the inner end thereof and curves inwardly and then extends in a straight direction to the outer end. This provides two passageways D and E within the barrel |2. The passageway D leads from the suction pipe 20c (which screws into a threaded opening in the outer end of the barrel) and thence continues lengthwise of the barrel to the central open inner end thereof which registers with the casing barrel Sil. This provides a direct course for suction from the suction pipe 20a to the eye of the impeller. The passageway E on the other hand leads fromthe pressure chamber B in the base of the pump inwardly and by a gradual course outwardly to a threaded opening which receives the pressure drive pipe 28 leading to the jet in the well.

Accordingly, when the deep well construction has been installed and the pump iilled with water to operate it, the pressure caused by the rotating' pump in the chamber A passes to the chamber B and thence through the passageway E to the drive pipe 28, thus supplying the upwardly facing jet nozzle 2d in the deep `well jet. This forces suction water upwardly in the jet to boost the suction water coming through the strainer 2| and passing upwardly around the nozzle and into the jet tube and thence into the suction pipe 20a.

A valve |33 is placed between the pump and the pressure tank. This valve is used when the pump is used as a deep well pump and serves to reduce the ow from the pump to insure suiiicient flow of fluid to the jet 23 in the well. This valve may be manually adjusted and once adjusted does not need further attention. Such valve, while shown applied to the pump when used for shallow wells, may be eliminated if so desired.

In a water system it is desirable to maintain a certain air pressure within the service tank 4i). This may be well effected by supplying the tank with an automatic air pumping attachment `which also automatically controls the water level in the tank. For the sake of completeness, I have shown and will now describe the general characteristics and operation of such an air pump. It is indicated at 60 at Fig. 1 and is attached to the tank and connected through tubing 6| to the suction side of the pump. The suction pull of the pump moves a diaphragm of the air pump, thus drawing external air through a snifter valve into the space on the tank side of the diaphragm. When the pump stops, the pressure is equalized on both sides of the diaphragm and the trapped air is forced by a spring into the tank. This action occurs with each start and stop of the pump, until the proper amount of air has been forced into the tank, at which time the air pump automatically stops delivering air. No air passes from this device through the pump to cause a decrease in pump capacity or to break suction.

One form of automatic air pumping attachment above outlined is shown in Fig. 6 where |30 indicates one member of a casing secured to the tank having its interior in communication therewith. The other member |3| of the casing is formed to leave a space between said members in which is a diaphragm |33 and a spring |34 pressing the diaphragm toward the tank. The pipe 6| from the suction conduit to the water pump com* municates with the internal space occupied by the spring on that side of the diaphragm. On the other side of the diaphragm there is a passageway from the space to the snifter valve |35, which is an inwardly opening check valve under spring control and adjusted to allow the entrance of air when the diaphragm moves outwardly against its spring.

Accordingly, when the pump starts the suction pull moves the diaphragm outwardly against the pressure of the spring, then when the suction ceases the spring forces the air drawn through the snifter valve into the space beyond the diaphragm into the pressure tank. There may be a check valve between the diaphragm and pressure tank opening intol the tank, or a similar checking operation may be eiected by making the passage to the tank materially smaller than that from the exterior to the diaphragm, as shown in Fig. 6.

It will be seen that my pump is well adapted for use in a water system having a pressure service tank and of course it is equally adapted for pumping to an open discharge or into a continuous pipe. The adaptation to shallow well or deep well installations is readily made and involves merely two simple and comparatively inexpensive interchangeable units, either being attached in the same position to the pump casing through a single opening therein, and seating against the same casing surfaces.

I claim:

l. In a pumping device, a pressure pump, a casing provided with a pressure chamber in communication with the pressure side of said pump, a discharge passage leading from said chamber to the exterior of said casing, a passageway in said casing in communication with the suction side of the pump and having an open end terminating in a plane spaced from the external wall of said casing, a member removably mounted on said casing and extending into the interior of said chamber, a jet pump carried by said member and having a pressure inlet and a suction inlet and a jet tube, said jet tube discharging into said passageway, said member having two passageways one of which extends from the suction inlet oi said jet pump to the exterior of said casing and the other of which extends from the pressure inlet of said jet pump to said pressure chamber.

2. In a pumping device a pressure pump, a casing providing a pressure chamber in communication with the discharge of said pump, said casing having a pair of openings each providing communication between said chamber and the exterior of said pump, a barrel in said chamber and in communication with the suction side of said pump, and having an open end spaced from the wall of said casing, a thimble secured to said casing and extending through one of said openings into said pressure chamber, the inner end of said thimble abutting the open end of said barrel, a jet pump mounted on said thimble and having a jet tube extending and discharging into said barrel, said jet pump having a pressure inlet and a suction inlet, and said thimble having one pas- 7 sageway extending from the pressure inlet o'f the jet pump to the pressure chamber and a second passageway extending from the suction inlet of the jet pump to the exterior of said casing.

3. In a pumping device, a rotary pressure pump, a casing surrounding said pump and providing a pressure chamber extending above and below the pump and in communication with the discharge thereof, means adjacent the top of said chamber providing a pressure discharge from the device, a conduit in said chamber below the rotary pump and in communication with the suction side thereof and having an open end .terminatingin a plane spaced from the internaly wall of saidcasingsaid casing having an opening in alignment with said conduit, a hollow member removably secured to said casing and extending through the opening therein into any abutting' relation with said conduit thereby sealing said conduit from direct access to said pressure chambensaid member having a `jet pump mounted thereon and including a jet tube, a pressure inlet and a suction inlet, said jet tube extending into said conduit, saidY member having a passageway extending from the suction inlet of the jet pump to the exterior of saidcasing and a second passageway extending from'the pressure chamber to the pressure inlet of said jet pump.

4. A device for converting a deep well pump to a shallow well pump and comprising a pump casing, a cylindrical member adapted to extend into the pump casing, a ilange cn one end of said member adapted to be secured to the 'pump cas- Y ing, a jet pump tube secured to and extending outwardly from the other end of said member, a jet mounted within said jet tube, said member having a passageway extending from the open flanged end of said member and encircling the inner end of said tube and communicating with passageways formed in the wall of said tube, said Y member having an integrally formed hollow elbow providing a passageway extending from said jet to an opening in the cylindrical wall of said member.

5. In a pump, the combination of a hollow base and a surmounting casing providingtwo connected pressure chambers, one in the casing and one in the base, anV opening from the exterior into the base pressure chamber, an impeller within the casing having its suction orifice by means of a passageway through the partition wall between vthe base and the casing, a fixed tubular member within the hollow base communicating at one end with the suction orifice of the impeller and at the other end having an open orice within the base pressure chamber and registering with but spaced from said opening trom the exterior into the base, and a hollow member adapted to extend through the said opening in the base and engage at the inner end with the xed tubular suction member in the base and adjacent the outer endwith the wall of the base, said hollow member having a longitudinal passageway leading from the exterior to the inner end of the hollow member and having a lateral passageway leading from an orice through the wall of 'the hollow member in a region within the pressure chamber in the base, said hollow member having internal passageway communicating with said wall orifice and adapted to discharge liquid under pressure from the pressure chamber in the base.

6. In a pump, the combination of a hollow base and a surmounting casing providing two connected pressure chambers, one in the casing and one in the base, an opening from the exterior into the base pressure chamber, an impeller within the casing having its suction orifice by means of a passageway through the partition wall between the base and the casing, a fixed tubular member within the hollow base communicating at one end with the suction orifice Vo i" the impeller and at the other end having an open orifice within the base pressure chamber and registering with but spaced from said opening from the exterior into the base, anda hollow member adapted to extend through -the said opening in the base and engage at the inner end with the xed tubular suction member in the base and adjacent the outer end with the wall of the base, said hollow member having a longitudinal passageway leading from the exterior to the inner end of the hollow member and having a lateral passageway leading from an orifice through the wall of the hollow member in a region within the pressure chamber in the base, a jet tube located in said xed tubular member, and a nozzle carried by said hollow member discharging into the jet tube, said nozzle at its receiving end being in communication with the lateral passageway through the wall of the hollow member.

7. In a pump, the combination of a hollow base and a surmounting casing providing two connected pressure chambers, one in the casing and one in the base, an opening from the exterior into the base pressure chamber, an impeller Within the casing having Vits suction orice by means of suction member in the base and adjacent the outer -end with the wall of the base, said hollow member having a longitudinal passageway leading from the exterior to the inner end of the hollow member and having a lateral passageway leading from an oriiice through the wall of the hollow member in a region within the pressure chamber in the base, said hollow member having within it a passageway leading from the inner end of said lateral passageway to an oriiice on the outside of the wall of the base, a pressure 'pipe in communication with the last mentioned orice, and a jet pump coupled with said pressure pipe. f,

ROBERT H. lVicBEAN.

REFERENCES crrnn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,077,213 Conery et al. Apr. 13, 1937 2,183,421 Brady Dec. 12, 1939 2,257,507 Mann sept. 3o, 1941 2,291,760 Rupp Aug. 4, 1942 2,335,109 Conery Nov. 23, 1943 2,375,571 Mann May 8, 1945 2,403,555 Ruth July 9, 1946

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