US1758400A - Pumping system - Google Patents

Description

Patented May 11i, 193@ RACHELLE JAC'ZZI, 0F BmKmaEY, CALIFORNIA.

'rimarrete sas'rm Application led May 9,

Myinvention relates to pumps, and more especially to pumps of the centrifugal type. An object ofmy invention is to provide a pumping system whereby a centrifugal pump A may be used for dee ywell service Without the necessity of 'insta ling machinery below the ground level. l Another object is the provision of a pumping system adapted to discharge water at a pressure higher than the pressure ordinarily obtainable w-ith the pump employed in the system.

Another object of the invention is to provide a pumping system capable of handling 15 water havingv a relatively high content of sand or other suspended mattelxi Another object is the provision of a deep well pump having a low manufacturing cost, and one which is positive and dependable in its operation. My invention possesses other objects and `valuable features, some of which will be set -forth in the following description'of my invention which i's illustrated in the drawings forming'part of the specification. It is'.to be understood that I do not limit myself to the showing made by the said description and drawings, as "I may adopt varying forms of mienvention withln the scope of the claims. ferring to the drawings:

Figure` 1 is an elevation of the pumping system of my invention, together with the connections thereto. Parts are broken away to reduce the length of the gure.

Figure 2-is a diagrammatic longitudinal sectional view of the nozzle and eductor-tube forming a part of my pumping system.

-It is to be understood that the pumping system of my invention may be utilized for 4o pumping any free flowing liquid; but for the present discussion, itwill be sulficient to consider it as'installed for pumping water. For-this purpose, a pump preferably of the centrifugal t e,-is suita ly mounted near t the wellor ot er source of supply. Both the 1927. "Serial No. 189,809.

intake and discharge pipes lead downwards into the well to a suction head, the bottom of which is immersed in the water. Within the suction head is an eductor-tube flaring into the intake pipe and opening at its other end into the suction chamber; and a nozzle forming the terminal of the pump discharge pipe, directs its jet at high velocity upwards V thru the eductor-tube and into the intake pipe,

creating an area of low pressure within the eductor-tube. The suction head is provided with a foot valve and strainer to permit the ingress of well water at a pressure dependant upon atmospheric pressure plus submersion pressure. The two streamsV mix within the 6o eductor-tube, where their resultant velocitty head is converted into pressure head su cient to lift the water' up to the pumpthru the intake pipe. A' valve leading from the upper end of the intake pipe provides a low @5 pressure discharge; but the pressure remainf4 ing -in the intake pipe, less friction and eddy losses, is added to the normal pump pressure. Thus, if the low pressure discharge `valve is left closed, water may be taken from the pumping system at a pressure, much higher than that obtainable with the pump y connected inthe ordinary manner.

In greater detail, the pumping system of my invention includes a pump 6, preferablyr of the centrifugal type, suitably mounted over a well 7 or other source of supply. Both the discharge, or high pressure pipe 8, and in take, or low pressure pipe 9, lead downwards into the well and terminate in a suction head, 80.

into the upper portion or body 11 of which Geachis threaded. This u per portion 11 is preferably cylindrical ,in orm, with a recess, 12 in'one side thereof, directly below the' low pressure y through t e lower end of the recess 12 into the pressure chamber 14,*into which the high `pressure pipe 8 leads. Thenozzle is adapted to direct its jet vertically u wards into an 'eductortube,threaded throng the upperend 9o pipe 9. A lnozzle 13 is threaded 85 25 A the normal capacity of the pump, because the u of the recess 12. The eductor-tube has a cylindrical bore 16, and a tapering bore 17 ilar-l ing upwards therefrom into the low ressure y pipe 9 into which the upper end of t e eductor-tube extends. When water under pressure is forced through the nozzle, the jet, as

when t e pressure is reduced in the eductortube, the well water 19 is forced by atmospheric and submersion pressure through the strainer 21, foot valve 22 and suction cham- `ber 23, into the eductor-tube, Where the two streams mix. Here the resultant velocit head is converted into pressure head, whic is capable of lifting the column of water within the low pressure pipe up to the pump and low pressure discharge 26. The quantity of water delivered at this point is greater than jet is augmentedby the water mixed therewith in the eductor-tube. It may thus be understood that by opening the valve 27, a flow of water may be had greater than that obtainable with the pump connected in the ordinary manner. A portion 28, higher than the pum intake, is included in the low pressure disc ar e to ensure that all the water is not drained om the system, which would result in the pump losing its prime. Whatever ressure remains in the pipe 9 1s added to t e ump'pressure, with the result that when t e low pressure discharge is restricted or closed, the pump delivers Water at a pressure higher than it is normally able to .A develop. A high pressure discharge 29, controlled by a valve 31, is therefore provided adjacent the pump discharge. Means for priming the system are included, comprising a primary-cup 32 connected by a valve 33 into thev high pressure discharge. i

It is readily understood that my pumping system is adaptable to deepwell service, as the force exerted by the pump is applied atthe bottomof the column of water in the pipe 9 -instead of at the top. The height of the pump above the water line is accordingly not limited to 22 feet, the greatest practical height to lift water by atmospheric pressure.

' Figure 2 is a diagram showinglwhat I hav found to be the most eiiicient rela 've positioning of. the nozzle and eductor-tube. lThea highest degree of vacuum will becreated if the nozzle be so spaced from the eductor-tube that an angle of 6 degrees is included between lines drawn in a plane passing through the common axis of the two members, each of which lines` intersects the tip of the nozzleand the nearest point in the circle in which the cylindrical portion and the tapered. portion of the eductor-tube meet. Y

lThe pressure available at either the low or high pressure discharge may be varied by altering the. size of the eductor-tube or the nozzle. A jet almost as large in cross section as the cylindrical portion of the eductortube will give a very high pressure, but at a sacrifice in volume; whereas a very small jet will deliver much more water at either discharge; but at lower pressure.

I claim:

1. In a pumping system, a pressure head comprising a cylindrical body havin a recessl in'communication with the flui tn be pumped in one side thereof, a discharge pipe opening into said body, an eductor tube passing through a portion of said body and terminating in one wall of said recess, and a4 nozzle supplied bysaid discharge pipe in alinementwith and directed into said eductor tube in an opposite wall of said recess.

2. In a pumping system, a pressure head comprising a cylindrical body having a recess in communication with the fluid to be pumped in one side thereof, a dischar e pipe opening into said'body, an eductor tu e having a cylindrical intake and a iiarin dlscharge passing through a portion o said body and terminating in one wall of said recess, and a nozzle supplied by said discharge pipe in an opposite wall of said recess and directed into the intake of said eductor tube. 3. In a pumping system, a pressure head comprising a cylindrical body having a recess in one side thereof, a discharge pipe opening into said body, an eductor tube passing through a portion ofsaid body and terminating in one wall of said recess, a nozzle supplied by said discharge ipe in alinement with and directed into sai eductor tube in an opposite wall of said recess, and a shell surrounding said body and said recess and having a passage therethru connectingthe recess With the Huid to be pumped.-

4. In a pumping system, a pressure hea comprising a cylindrical body having a recess in one side thereof, a discharge pipe/opening into said body, an eductor tube' passpumped in one side thereof, a discharge pipe opening into saidl body, an eductor tube having a cylindrical intake and a flarin dis- IGI charge passing through a portion o said.

body and termmating one wall of' said recess, and a nozzle supplied by said discharge pipe and havi a flaring once in an opposite wall of sai recess, said eductor tube and orifice bein so disposed that the conical angle defined y the lips of said orifice and the Junction of the intake and discharge portions of said eductor tube is of the order of six degrees.

In testimony whereof, I have hereunto set my hand. t

RACHELLE J ACUZZ.

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