US1445497A - Compressed-air liquid elevator - Google Patents

Description

Feb.` 13, 1923.

1,445,497. w. B. DIXON.

COM'PRESSED AIR'LIQUID ELEVATOR.

FILED MAR-23. 1921. 2 SHEETS-SHEET h4 Feb. 13, 1923.

1,445,497; W. B. DIXON. coMPREssEn Am Lloum ELEVATOR.

FILED MARjzs. 192|.

2 SHEETS-SHEET`2.

. v Snom/V60@ W. f" www Patented i3, lQZ.

l naires L. MARSH AND ONE-THIRD T0 CAROLINA.

0F ONE-THIRD TO VANN BOTH OF SPRAY, NORTH COMlPRESSEiv-AIR LIQUID ELEVATOR.

Application filed March 23, 1921.

To all fui/om t may concern.'

Be it lnown that l, l/VALTER B. Dixon, a citizen of the United States, residing at Spray, in the county of Rockingham and State of North Carolina, have invented certain new and useful Improvements in Compressed-Air Liquid Elevators; and i' Vdo hereby declare the following` to be a full,'clear, and exa-ct description of the invention, such as will enable others skilled in the art to which it appertains to maleand use the same.

The invention has relation to the lifting of liquids from deep wells and has for its principal object the provision of means by which compressed air is utilized for .moving a pumping piston downwardly .and springs to raise the piston when the `pressure of the air is relieved, the admission of airto the pump cylinder and its discharge.therefrom being automatically controlled by the movement of the piston.

A. further object of the invention is the provision of a pump cylinder adapted to A,be inserted in the well and having its lower end communicating with the liquid in the well by means of a valved pipe, and a valved discharge pipe also connected with the lower end of the cylinder and extending to above the top of the well. The upper end of the cylinder is Iconnected to a source of supply of air under pressure by means of a pipe provided with a valve to control the entrance of air to the cylinder. The upper end of the cylinder is also provided with a valved ldischarge for releasing the pressure from the cylinder. Mounted in the cylinder is a pump piston having springs connecting it with the top ofthe cylinderv to normally raise it, said piston beinof actuated downwardly .by air pressure admitted through the air pipe aforesaid. A plunger is also provided and actuated by the piston to close the valve in the air supply pipe and open the valve in the discharge whenV the 'piston Vis moved downwardly to release the pressure 'above the piston and permit the springs -to raise itA for another stroke.

y by the line 2-2 of Serial No. 454,890.

The details of the invention will be described hereinafter and illustrated in the accompanying drawings in which l? ig. l is a central vertical sectional view of a fragment of a well casing showing my improved liquid elevator positioned therein,

Fig. 2, a cross section on a plane indicated i Fig. l looking in the direction oi the arrows,

.F ig. 3, asimilar view on the line of Fig. l looking in the direction of the arrow,

l* ig. 4., a longitudinal sectional View on au enlarged scale of the air discharge pipe.

Fig. 5 is a view on line 5-5 of kF ig. l.

Referring to the drawings in which similar reference characters designate corresponding parts: in the several views, A indicates a well casing of the usual construction. l designates a` pump cylinder in casing A having its lower end connected by means of a pipe 2 with the liquid in the well and orovided with a valve 3 of any suitable type and arranged to permit the liquid to enter the cylinder but to not discharge therefrom. fl designates a. pipe also connected with the lower end of the cylinder and leading tothe top of the well and provided ,with a Vgsuitable valve 5 arranged to preventreturn of the liquid in the pipe to the cylinder.

The upper fend of the cylinder is connected with a source of supply of air under pressure by means of pipe 6 having a valve, preferably of the ball type, designated 7, and a valve seat 8. 9 indicates a. discharge pipe in the upper end of cylinder l `and provided with a valve l0 that is normally closed bv a spring 11.

l2 designates the pump piston reciprocally mounted in cylinder l and provided with the usual pac-king rings 13 of any preferred type, said piston being preferably made of sheet met-al. 14 indicates springs connecting the upper end of piston l2 with the upper end of cylinder l, said springs having sufficient retractile strength to overcome the weight of and raise piston l2 and the column of liquid in the cylinder and supply pipe 2.

15 designates a. plunger, Iprefeiably `rec- 'ton 12 to its initial )osition s )rino 7 Z3 CSI tangular in cross section larged head 16 that is slidably mounted in a central rectangular recess 17 formed iii piston 12, 18 indicating anti-friction rollers journaled in the upper end of recess 17 and adapted to engage the sides of plunger above the head 16 and also act as a stop to engage head 16 and lower the plunger when the piston nears the completion of its downward stroke. Plunger 15 is guided in its movements by elongated rectangular bearings 1S secured to the walls of cylinder 1 by bars 19 formed integral with said bearings, said bearings being ai' anged one above and the other below the plane of discharge pipe 9. 20 indica-tes a spring connecting plunger vl5 and the lowcrmost bearing 1S and adapted to normally lift said plunger.

The upper en d of'plungei' Yl5 is foi-ined with a reduced portion 21 that is adapted to engage ball valve 7 and lift it from its seat when plunger 15 is in its uppermost position. Immediately below reduced portion 2'1 is anv inclined shoulder 22 that is engaged by a roller 23 journaled in the end of arm 24 secured to the wall of cylinder 1.

25 designates a yoke surrounding plunger 15 and connected at one yside to the stem of valve 10 by means of a chain or other ilexible member 26, while the other side of the yoke is connected to the opposite wall of the cylinder 1 by means of i'eti'actile coil spring 27 28 indicates rollers mounted on the sides of yoke 25 and forming an antifriction bearing for plunger 15.

In operation, assuming thatthe piston 12 is in its uppermost position, valve 7 is in open position and valve 10 closed, air under pressure will enter cylinder 1 and will force piston 12 downwardly. When rollers 18 engage head 16 of plunger 15, said plunger will be also actuated downwardly permitting valve 7 to close and spring 27 will retract and pull saidplunger in the direction of the springand open valve 10 to permit of escape of air from lthe cylinder. When the air pressure in the cylinder is reduced suliiciently springs 14 will retract raise pis- 2() at the saine time raising plunger 15. When plunger 15 is moved upwardly roller 23 on arm 24 by engaging inclined shoulder 22 will move said plunger to the side against the resistance of spring 27 thus permitting spring 11 to reseat valve 10 and stop the discharge of air from the cylinder and the continued upward movement of the plunger will cause reduced portion 21 to engage valve 7 and unseat it to permit resumption of admission of air for the next stroke of the piston. It will be further understood that on the downward stroke of the piston the liquid in the lower end of cylinder 1 will be discharged through pipe 4, valve and having an en-l cylinder, means Lilia-ie? on the up stroke of 3 being closed, while enter 'the cylinder to the piston liquid will lill the vacuum caused by movement of the piston, valve 5 in pipe 4 being closed.

It will also be understood that changes in construction may be made within the scope of the invention without altering the spirit thereof, and l do not, therefore, limit myself to the specific construction as shown and described except as specifically set Vforth in the claims appended hereto. l.

Having thus described the invention what I claim is 1. In a compressed air liquid elevator, a pump cylinder, a piston in said cylinder, means to urge raising movement of said piston, valve control means to admit air under pressure to said cylinder to lower the piston including a plunger, means to urge lateral movement of the plunger and valve controlled means for the discharge of air from the cylinder adapted to be opened through lateral movement of the plunger.

2. In a kcompressed air liquid elevator, a pump cylinder, a pipe for conveying air under pressure to said cylinder, a valve in said pipe, a pipe for discharging air from the cylinder, a spring seated valve in said discharge pipe, a spring normally tending to open said spring seated valve, a yoke interposed between the last mentioned spring and the valve, a piston mounted to reciprocate in said cylinder, springs normally tending to actuate the piston against the pressure of air in the cylinder, a plunger operatively connected with said piston and with the yoke aforesaid, said plunger having means to actuate the valve in the air supply pipe,

and means to actuate the plunger to moveV the yoke against the resistance of the spring secured thereto. l

3. In a compressd air liquid elevator, a pump cylinder, a pipefor conveying air under pressure to said cylinder, a valve in said pipe, a pipe for discharging air from the cylinder, a spring seated valve in said discharge pipe, a spring normally tending to open said spring seated valve, a lyoke interposed between the last mentioned spring and the valve, a piston'mounted to reciprocate in said cylinder, springs noi'- mally tending to actuate `the pistonagainst the pressure of air in the cylinder, a plunger operatively connected with said piston and slidaloly mounted in the yoke aforesaid, said plunger provided with means to actuate the valve in the air supply pipe, an inclined shoulder on said plunger, and means engaging said shoulder to actuate the yoke against theresistance of the spring secured thereto.

4. In a compressed air liquid elevator, a pump cylinder, a piston operable Vin said to urge movement of the piston to a normal position, means of oomtioned means and adapted to open after 10 pressed air supply to move the piston oounclosing) of the first named valve.

ter to Said means, a out off valve for the In testimony whereof I aHix my signaseoonol mentioned means, means normally ture in presence o1" tWo Witnesses. maintaining said valve open, said latter means being operable to permit Closing ot WALTER B' DXON' the valve through movement of the piston, VVitnlesses: and an outlet valve for the cylinder con- L. S. NEAL.

trolled through movement of the third menp P. W'. ZIGLAR.

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