US3151560A

US3151560A - Pumping system or apparatus for deep wells

Info

Publication number: US3151560A
Application number: US11821A
Authority: US
Inventors: Rosa Esau Da Silva
Original assignee: Individual
Current assignee: Individual
Priority date: 1959-02-27
Filing date: 1960-02-29
Publication date: 1964-10-06
Anticipated expiration: 1981-10-06

Description

Oct. 6, 1964 E. DA SILVA ROSA PUMPING SYSTEM OR APPARATUS FOR DEEP WELLS Filed Feb. 29, 1960 3 Sheets-Sheet 1 INVENTOR 5 441 DA 6/4144 P0634 BY 5M A ATTORNEYS Oct. 6, 1964 E. DA SlLVA ROSA PUMPING SYSTEM OR APPARATUS FOR DEEP WELLS Filed Feb. 29, 1960 3 Sheets-Sheet 2 INVENTOR isnu .274 5/4 :44 P054 BY MQW 7M ATTORNEYS Oct. 6, 1964 5, DA SILVA ROSA PUMPING SYSTEM OR APPARATUS FOR DEEP WELLS Filed Feb. 29, 1960 3 Sheets-Sheet 3 /6 INVENTGLZ BY fiwww-yrm ATTORNEYS United States Patent 3,151,560 PUMPING SYSTEM OR APPARATUS FOR DEEP WELLS Esau da Silva Rosa, Rua Dr. Santos Rocha 17, Figueira da Foz, Portugal Filed Feb. 29, 1960, Ser. No. 11,821 Claims priority, applicatiensPortugal, Feb. 27, 1959, 35,8 8 3 Claims. (Cl. 103-5) The present invention relates broadly to a pumping system.

More particularly, the invention relates to a pumping system or apparatus, of the type utilized for pumping liquid from wells and which include means for mixing air with the ascending column of liquid.

Still more specifically, the invention relates to a pumping system or apparatus applicable to pump water admixed with air from deep wells.

It is, therefore, an object of the present invention to provide a pumping system or apparatus which includes conduit means disposed within a well and having inlets associated therewith for receiving air and water and pump means operably associated with the conduit means for elevating a column of air-water mixture from the well and in which the pump means includes a vacuum pump and the proportion of the air in the air-water mixture being variable according to the cross-sectional area of the air inlet and the atmospheric pressure surrounding the conduit means.

It is a specific object of the invention to provide a combination including a chamber for receiving the airwater mixture and in which the air is separated from the water, a first rotary pump having an inlet communicating with the chamber'adapted to pump water therefrom for delivery and a second rotary pump for delivering a column of the air-water mixture to the chamber.

It is a further specific object of the invention to provide a casing structure adapted to be associated with a well and which includes an upper separating space, an inlet for air-water mixture provided in the upper portion of this casing structure and a vertically disposed conduit having an upper open end disposed above the water level in the casing structure and operably associated with a rotary pump mounted on one side of the casing structure and which includes an outlet for delivering air, further on the opposite side of the casing structure is mounted another rotary pump having an inlet in communication with the watencontaining portion of the casing and which second pump is operable to deliver water, and a common shaft extends through the casing structure and carries the rotors of both pumps. As a further object, the casing structure includes a Web portion carrying a tubular boss that is operable to receive and support a portion of the shaft disposed within the casing.

Further and more specific objects of the invention will be apparent from the following description taken in connection with the accompanying drawings in which:

FIGURE 1 is a view partly in elevation and partly in longitudinal section illustrating the casing structure and the two pumps of one form of the invention,

FIGURE 2 is a view partly in vertical section and partly in elevation illustrating the pumping apparatus or system of the invention installed in operative relation to a well,

FIGURE 3 is a transverse sectional view illustrating one form of vacuum pump of the present invention in one position of adjustment as regards its capacity, and

FIGURE 4 is a similar view illustrating the pump of FIGURE 3 with the parts in another position of adjustment.

ice

In the drawing, FIGURE 2, the well is denoted generally at P and includes a cap structure at the top having an opening therein through which is disposed the pipe 18 having an open lower end disposed beneath the surface of the water in the well. On the cap structure is carried a casing denoted generally at C which in the illustrated form comprises two parts, 1 and 2. The upper part 1 is suitably secured to the lower part 2. To one wall of the lower part of the casing 2 is mounted a centrifugal pump B and to the opposite wall is mounted a vacuum water ring pump D. The stator parts of these pumps are removably secured to the opposite walls of the casing part 2 and like the casing are made of cast iron or other cast metal. A shaft 5 extends through the casing and carries the

rotors

3 and 4 of the two pumps. A web structure is disposed within the lower part of the casing 2 and is integral with the wall thereof and is formed to provide a tubular portion 7 which receives and supports a portion of shaft 5. A ball-bearing structure 6 mounted in the stator journals another portion of shaft 5. A conduit 8 extends between an opening in the wall of easing part 2 adjacent pump D to the upper portion of easing part 1. This conduit 8 has an open upper end near the top of easing part 1 and functions as an inlet conduit for the pump D. Another conduit 9 is provided in association with the casing part 2 and functions as an outlet passage for pump D. A bafde It) is provided on the righthand wall of easing part 2, FIGURE 1, to separate the inlet and

outlet

8 and 9 of pump D. This bafile plate is shaped as shown in FIG-

URES

3 and 4 and includes two arcuate portions 10", 10", a central web and a tubular portion that surrounds the shaft 5. The arcuate portion 10" is of substantially greater circumferential extent than the portion 19. The rotor 4 is provided with blades 4' and passages 4 for receiving air from conduit 8 and delivering air to the outlet 9. A cover 11 is mounted on the stator of pump D and a suitable bushing and packing shown generally at 12 is likewise provided around shaft 5. The pipe or conduit 18 that extends from beneath the surface of the water to the upper casing part 1 is provided with a series of

calibrated orifices

19, 20, 21 and 22, these orifices serving as inlets for air as regards pipe 18 so that the rising column is a mixture of air and water, whereby the weight of the liquid is reduced as the height of the column increases in order to make possible the elevation of the liquid by the pump means. It is to be noted that as shown in FIG. 2 the cross sectional areas of the

orifices

19, 29, 21 and 22 progressively increase toward the lower end of pipe 18 to increase the amount of air entering pipe 18 as the water level lowers. This mixture of air and water is drawn into the upper part 1 of the casing and in the upper part the air is separated from the water by gravity action. The air enters the open upper end of pipe 8 and flows to pump D, through the latter and is then expelled to the atmosphere by the pipe 9. The water from the lower part 2 of the casing enters the inlet of the centrifugal pump B and is delivered to a discharge-pipe 23 that is connected to the outlet of pump B. A valve 24 is associated with the outlet of pump B.

The structure of casing and pumps can be secured in position on the well cap by suitable clip means denoted generally at 25. A priming inlet 26 is provided in communication with pump D and an electric motor, not shown, is coupled to shaft 5 for driving the latter and thus the rotors of the pumps B and D.

In the operation of the invention, pump D is primed by supplying water through priming inlet 26. This inlet is capped or plugged and then the motor is started. The air contained in pipe 18 and in the chamber C is extracted until a vacuum effect is attained which causes the water gravity, the water being Withdrawn by pump B and forced through the discharge pipe 23 while the air is sucked through inlet 8 by pump D and expelled into the atmosphere. V

' FIGURES 3 and 4 illustrate a feature of the invention in which the water-ring pump Dis provided with a circular member 13 that is termed a false stator. The member 13'is disposed between the interior of the outer casing or stator of pump D and the external periphery of rotor 4. Oppositely disposed

projections

14 and 15 are slidably arranged with relation to sockets formed in the stator or casing of the pump. A hand wheel 16 is supported by the upper socket and carries a; threaded spindle 17 associated with internal threads in the upper projection 14 of the ring 13. This'ring 13 is a bronze ring and adjusts itself 'with respect to the inner-walls of pump D by means of packings, not shown. By manipulating hand wheel 16, the position of the ring 13 is varied transversely of the axis of pump rotor 4 so as to vary the In a fairly deep well'in which the water level is vari-' able, the arrangement of the series of orifices 19 to 22 in vertically spaced relation ensures that the lower the water level in the Well, the more air is admixed with the rising column so that the specific gravity of this column is almost constant the longer its travel is from the well to the pumps. Thus, as a feature of the invention, the proportion of the air in the air-Water mixture varies according to the cross-sectional area of the air inlet orifices in pipe 18 in relation to the number of the same orifices and to the depth at which the water to be raised is located and in relation to the surrounding atmospheric pressure.

' Accordingly, the use of a variable capacity, vacuum pump well; a casing enclosing a space of greater horizontal area than said conduit, said conduit being operatively connected to said casing so that liquid flowing upwardly in said conduit enters said casing, a centrifugal liquid pump operatively connected to said casing near the bottom thereof to take suction therefrom, an adjustable output vacuum pump operatively connected to said casing near the top thereof to take suction therefrom, said conduit being provided with a series of vertically spaced orifices at least some of which are adapted to be positioned above the surface of the liquid whereby air is entrained in the liquid being pumped, the size of said orifices increasing toward the open end of said conduit.

2. The pumping arrangement of claim 1, in which said centrifugal liquid pump and said vacuum pump are to surround said rotor, said false stator element being selectively movable from a position concentric to said rotor to positions eccentric to said stator, whereby the capacity of said vacuum pump may be varied;

References Cited in the file of this patent UNITED STATES PATENTS 45,153 Gunning Nov. 22, 1864 669,255 Hewlett Mar. 5, 1901 753,045 Cooper Feb. 23, 1904 1,034,703 Freeman Aug. 6, 1912 1,499,316 Oliphan-t June 24, 1924 1,731,688 Stuck Oct. 15, 1929 1,738,974 Taylor Dec. 10, 1929 2,008,172 Bryant July 16, 1935 2,015,938 Humason Oct. 1, 1935 FOREIGN PATENTS 388,908 Germany Ian. 22, 1924 512,003 Germany Nov. 4, 1930 662,514 Germany July 15, 1938 84,438 Austria June 25, 1924 463,208 Great Britain Mar. 24, 1937 1,104,008 1955 France June 8,

Claims

1. A PUMPING ARRANGEMENT FOR LIFTING LIQUID FROM A WELL OR THE LIKE WHICH IS OPEN TO ATMOSPHERE, COMPRISING A LIQUID CONDUIT HAVING AN OPEN END ADAPTED TO EXTEND INTO LIQUID IN A WELL, AND TO EXTEND UPWARDLY TO A POSITION AT A HIGHER LEVEL THAN THE LEVEL OF LIQUID IN THE WELL, A CASING ENCLOSING A SPACE OF GREATER HORIZONTAL AREA THAN SAID CONDIUIT, SAID CONDUIT BEING OPERATIVELY CONNECTED TO SAID CASING SO THAT LIQUID FLOWING UPWARDLY IN SAID CONDUIT ENTERS SAID CASING, A CENTRIFUGAL LIQUID PUMP OPERATIVELY CONNECTED TO SAID CASING NEAR THE BOTTOM THEREOF TO TAKE SUCTION THEREFROM, AN ADJUSTABLE OUTPUT VACUUM PUMP OPERATIVELY CONNECTED TO SAID CASING NEAR THE TOP THEREOF TO TAKE SUCTION THEREFROM, SAID CONDUIT BEING PROVIDED WITH A SERIES OF VERTICALLY SPACED ORIFICES AT LEAST SOME OF WHICH ARE ADAPTED TO BE POSITIONED ABOVE THE SURFCE OF THE LIQUID WHEREBY AIR IS ENTRAINED IN THE LIQUID BEING PUMPED, THE SIZE OF SAID ORIFICES INCREASING TOWARD THE OPEN END OF SAID CONDUIT.