US2391734A - Pumping system and apparatus - Google Patents

Description

Dec. 25, 1945. A. E. NITTKA PUMPING SYSTEM AND APPARATUS Filed Feb. 12, 1945 III III, ill! I!!! II; ,II I! Illil'l I! III! Mm awn,

Patented l. 25, 1945 UNITED STATES PATENT OFFICE PUMPING SYSTEM AND APPARATUS Alfred E. Nittka, Cleveland, Ohio Application February 12, 1945, Serial No. 577,479

3 Claims.

The present invention relates to a pumping system and apparatus and more particularly to an ejector type of pumping system and apparatus.

It has been the practice heretofore, to provide in deep wells one or more ejector nozzles in the intake pipe so that fluid can be forced through the nozzles in an upward direction, thereby creating a low pressure area and entraining fluid in the inlet pipe for raising the fluid to a level where the ordinary suction type pump can draw the fluid from the intake pipe. In these types of installations it is usual to place a check valve in the intake pipe,'generally below the lowermost ejector so that when the pumping action ceases the valve maintains a stand of water in the inlet pipe and the pump mechanism so that priming of the pump prior to a subsequent pumping operation is unnecessary. One common fault of such arrangement, however, is that frequently grit and the like lodge between the valve seat and valve member of the check valve, thereby preventing closure of the valve, and, consequently the priming stand of water is lost.

One object of the present invention is to provide a pumping system of the type referred to in which the check valve for maintaining the priming water stand is disposed relative to one of the elector nozzles so that the stream of fluid from the nozzle is ellective to maintain the check valve parts free of grit and'other foreign matter.

In carrying out the'invention, .I provide a nozzle which issues a let of circular form, which let surrounds an outlet in a section of the intake pipe. The outlet of the'sectlon of pipe forms a valve seat for a light weight'buoyant valve memher that is adapted to rest lightly on the valve seat when the pump is inoperative and is adapted to be raised from the valve seat by action of the jet when the pump is operative. The valve member is provided with a stop for limiting its valve opening movement, and the stream of fluid of the jet plays on the valve member thereby maintaining it free of grit and the like. Preferably, I form the valve member so that itdiverts the fluid rising through the valve seat outwardly into the jet. and the valve member is tapered upwardly for eliminating eddy currents thereabove.

Another object of the invention is to provide a nozzle that produces an efliclent jet in the intake pipe and which nozzle is adapted to be easily manufactured and installed in the p mping system. The nozzle is formed by providing two telescopically arranged tubular members having their confronting walls spaced apart and so shaped that a gradual constriction is formed between the two members toward the outlet of the inner member, whereby a circular jet is formed about the outlet or the inner tubular member.

The inner tubular member is connected with. and forms a part of, the intake pipe of the suction Pump Other objects and advantages or the invention will be apparent from the following description of one form of the invention, reference being had to the accompanying drawing wherein,

Fig. l is a view, partly in section, of a pumping system for a water well;

Fig. 2 is a fragmentary view in section of the ejector nozzle and check valve shown in Fig. 1, but

driven by any suitable means (not shown) such as an electric motor, for example. The pump l2 includes an intake at H,- and it discharges into pipes l5 and IS. The pipe I! may conduct the waterpumped from the well to wherever the water is to be used, and the pipe 16 is adapted to direct water to electors l1 and I8. located in an intake pipe M in the well bore. I The intake pipe It may include several sections of pipe connected by couplings.

The ejector ll includes a casing 20 having a hollow body 2i and an inlet 22 to the body.

Threaded, aligned openings 23 and 24 are formed in the casinELand a tube 25 is threaded in the opening 23 and a tube 26 is threaded in the opening 24. The tube 25 has a section thereof. enlarged at 21 and the diameter of the tube leading '40 from the casing to the enlarged portion gradually reduces. The tube 26 extends into the tube 25 and the outlet of tube 28 is located at the entrance to the enlarged portion 21. The walls of the tube 26 taper toward its outlet and a valve seat 28 is formed at the outlet by beveling the tube. It will be seen that the passage between the tubes 25 and 26 is gradually restricted toward the outlet of tube 28. As an example of desirable dimensions of the ejector, assuming the inside diameter of the tube 28 to be 21 mm., the space between the inside and outside of tubes 25 and 26 at the lower end of tube 25 should be 2 mm. and at the upper end of the tube 26, 1 mm. The outside diameter of the tube 26 at the valve seat 28 should be 22.5 mm.

member 32 is threaded in A valve member 30 is adapted to close on the top and. bottom. A hollow. conoidal'shabed cap the top opening and a stem assembly 23 is threaded in the bottom open- I ing. The hollow cap 22 lends buoyancy to the valve member so that the valve member is easily lifted from its seat. The stem 33 has a stop member attached thereto in the form of a wheellike element 34, which element engages the lower end of the" tube 26 for limiting opening movement of the valve member 20. The element 34 is provided with openings 35 through which water flows into tube 28 when the pumping system is in operation. Preferably, a. sleeve 38 is threaded on the lower end of the tube 26 for forming a guide for the element 34.

It will be observed that the upper part of the stem 33 is flared outwardly so that water passing through the valve seat will be gradually diverted outwardly and about the body portion 3| and the conoidal shape of the cap 32 permits passage of water about the valve member with a minimum of resistance. Preferably, when the inside diameter of the tube 26 is 21 mm., the maximum diameter of the valve member is 23 The ejector I1 is connected in the pumping system by connecting the inlet 22 of the casing 20 with pipe It by a coupling 31 and connecting tube of particles that might otherwise block the valve open. Also, the ejectors are readily connected in pumping systems and they are extremely efficient in operation.

Having described the embodiment of my invention, it is to be understood that other forms of embodiments of the invention may be adopted,

25 with the intake pipe I! by a coupling 38 threaded on the tube 25 and pipe l2. When the pump I2 is operated, water is forced into the casing 20 and through the nozzle formed by the tubes 25 and 26. The jet issuing from the nozzle will be circular, surrounding the valve seat at the end of tube 26. The jet forms a low pressure area in the enlarged portion 21 of the tube 25, particularly adjacent the outlet of tube 26, causing the. valve member to be raised, as shown in full lines in Fig. 1 and in dotted lines in Fig. 2, and'water to be drawn into tube 25 through tube 26. The water issuing from the tube 26 is entrained in the jet and carried upwardly in pipe it. when the operation of the pump is halted, the water in pipe I! causes the valve member 30 to close onthe valve seat 28, as shown in dotted lines in Fig. 1 and in full lines in- Fig. 2, thereby maintaining the water in the intake pipe I! and the pump.

By the arrangement shown. the jet maintains the I valve seat and valve member free of grit and other obstructions which might interfere with proper closing of the valve. Thus, positive closure of the valve is assured so that water will always be present throughout the length of the intake pipe I! and in the pump l2, thereby eliminating the necessity of priming the pump. For the sake of clarity, no water is shown in the pipes l 8 and l9. The ejector I2 is similar to the ejector H, ex-

cept that there is no valve mechanism associated therewith. The ejector ll includes an inlet casing I0 having a chamber ll, an inlet 52 and threaded, aligned openings I53 and Il. A tube ll,

corresponding to the tube 25, except that there is no enlargement therein, is threaded in open ing I2 and a tube 50, corresponding to tube 26, is threaded in opening II. The inlet 82 of the easing is-connected in pipe II by a T connection I! and the tubes 55 and I! are connected in the in-.

take pipe I! by couplings II and", mtlvely. The jet produced by the ejector lfis similar to that produced by the ejector II. A number of electors similar to ejector ll may be connected in the intake pipe. depending upon the depth of the well. These electors. of course, will be located above the ejector II. which is preferably at the bottom of theintakepipe l2.

all falling within the scope of the following claims.( I

' duits. said valve member having a stem connected thereto and extending in the inner of said conduits. said stem having an oriflced disc attached thereto; and means forming a seat against which said disc rests when said valve is moved to the open position. whereby fluid flowing toward said valve member inthe said inner conduit passes through said oriflced disc.

. 2. In a pumping system for a water well, or the like, a vertically extending water intake conduit having a bulbous recess therein; a second conduit extending in said intake conduit and terminating adjacent to the lower inlet of said recess and adapted to discharge water upwardly into said recess; a valve seat at the discharge end of said second conduit; a valve member adapted to move to and .from said valve seat for closing and opening the said seat, said valve member being tapered toward opposite ends thereof whereby fluid issuing from said second conduit upwardly is diverted outwardly and afluid passage of gradually increasing cross-sectional area is formed between the upper portion of said valve member and the inside walls of said intake conduit leading from said valve seat through said recess, when said valve member is moved from said seat; and means other of said conduits.

3. In a pumping system for a water well, or the like, a vertically extending water intake conduit; a tubular member extending into said conduit and arranged to discharge fluid vertically into said conduit, the inside walls of said conduit and the outside-wall of said tubular member being spaced apart and forming a passage for water. which passage has a gradual constriction toward the discharge of said tubular member; means for directing fluid through said restricted P s age and vertically into said conduit, said tubular member having a relatively thin wall at the discharge end thereof and having a valve seat formed by, beveling the inner wallofthe tubular member adjacent the end thereof, and a valve member adapted to close on said seat, said valve member having a tapered part extending in said tubular NI'I'I'KA.

- mama

Images