US2675760A

US2675760A - Hydraulic liquid pump

Info

Publication number: US2675760A
Authority: US
Publication date: 1954-04-20
Anticipated expiration: 1971-04-20

Description

April 20, 1954 E. c. HALL HYDRAULIC LIQUID PUMP 2 sheets-sheet 1 Filed Sept. 29, 1950 f T s .usw Nw m A M l uw m H my @W l. m s l l sm\ ,www U Q\ H Q A Y h Q B, wf

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NN NW April 20, 1954 E. c. HALL l 2,675,766 HYDRAULIC LIQUID PUMP Filed sept. 29, 195o 2 sheets-sheet 2 INVENIOR.v

aus* C. HALL Patented Apr. 20, 1954 UNITED STATES PATENT GFFICE HYDRAULIC LIQUID PUMP Application SeptemberS, 1950, Serial No. 187,594

(Cl. S- 44) 2 Claims.

The present invention relates to an hydraulic liquid pump and it consists in the combinations, constructions and arrangements of parts herein described and claimed.

Generally there is provided an hydraulically operated liquid pump which is particularly adapted to deep well operations and which consists essentially of a motor comprising a pair of pistons mounted in cylinders and adapted to pump iiuid through a pair of lines to a pump which, in turn, consists of a pair of cylinders each connected with one end of a comparatively large cylinder and each having therein a piston which pistons are interconnected with a piston rod upon which is mounted a relatively large piston which reciprccates in the comparatively large cylinder. The apparatus is so arranged that pressure alternately applied to the two lines will cause a reciprocation of the pistons in the motor to thus upon each stroke force an excess of fluid taken in by the large cylinder through the line which is inactive at the moment and through certain valve connections in the motor send the excess of uid to a storage tank.

, It is accordingly an object of the invention to provide an apparatus of the character set forth which is relatively simple in construction, easy to operate and yet effective and eiicient in use.

A further object of the invention is the provision of an apparatus of the character set forth which is particularly adaptable to the pumping of fluids from deep wells and other places remote from a motor forming a part of the invention.

Another object of the invention is the provision of a novel motor forming a part of the invention.

Another object of the invention is the provision of a novel pump forming a part of the invention.

. Other and further objects of the invention will become apparent from a reading of the following specification taken in conjunction with the drawings, in which:

; Figure 1 is an elevational view, partly broken away and partly in section, of an embodiment of the invention,

- Figure 2 is an enlarged fragmentary sectional view, partly in section, of the motor portion of the apparatus,

Figure 3 is an enlarged sectional view of a portion of the pump portion of the apparatus, and

Figure 4 is a fragmentary reduced elevational view, partly in section, illustrating a modified pipe line construction utilized in the invention.

Referring more particularly to the drawings, -there is shown therein a bell crank lever I0 which 2 is pivoted at II and pivotally connected at one end, as indicated at I2, to a shaft I3. The other end of the bell crank lever I0 is connected to some suitable source of power (not shown) for oscillating the same to provide reciprocal movement for the shaft I3.

The shaft I3 extends into cylinders I4 and I5 and has mounted at either end a piston I6 and I'I which are respectively reciprocal in the cylinders I4 and I5. An aligning arm I8 is shown as interconnecting the outer sides of the cylinders Ill and I5. The cylinder I4 communicates with a casing I9 while the cylinder I5 communicates with a casing ISa. The casing I9 is provided with an extension 2li which is connected by a pipe 2I with a tank 22 and the casing Ia is provided with an extension 20a which is connected by means of a pipe 2 Ia with the storage tank 22. A passageway 23 interconnects the interior of the casing I9 and the extension 20 and a passageway 23a likewise connects the interior of the casing I 9a and the extension 20a. A cylindrical passageway 24 interconnects the extension 20 and the interior of the casing I9 and is provided with a seat 25 at that end thereof adjacent the extension 20 and a stop member 26 at its other end, A piston 2l is reciprocable in the passageway 24. A like passageway 24a, seat 25a, stop member 26a and piston 21a are provided in the members I9@ and 20a.

The passageway 23 is governed by a normally closed valve 23 which is provided with a spring 29 for maintaining the same in a seated condition. A like valve 28a and spring 29a are provided in the housing I9a for governing the passage 23a.

The housing I9 is provided with a compartment 30 having an opening 3| connecting the same with the interior of the casing I9 which opening SI is provided with a valve 32 which is maintained normally in a seated position by means of a spring 33. The casing lila is likewise provided with a compartment 30a having an opening 3 Ia, a valve 32a and a spring 33a.

The compartment 30 communicates with the passageway 24 by means of an opening 34 and the compartment 30a communicates with the passageway 24a by means of an opening 34a. A pipe 35 interconnects the storage tank 22 with a cylindrical extension 36 of the casing I8 and a like pipe 35a interconnects the storage tank 22a with a like cylindrical extension 36a, for the casing I9a. A cylindrical pressure relief valve 3l is urged by a spring 38 to normally close the pipe 35 from communication with the interior of the extension 3 and like elements 31a and 38a are provided in the extension 36a.

A pump structure is best illustrated in Figure l and consists of a relatively large cylinder 39 having in communication therewith at either end thereof a relatively smaller cylinder i0 and 46a. A pipe 4i interconnects the outer end of the cylinder 49 with the compartment 3G, and a pipe ela interconnects the cylinder 43a and the compartment 36a. A piston i2 is aixed to a piston rod 43 at one end thereof and is reciprocable in the cylinder Ale. At the other end of the piston rod 43 there is affixed a piston 42a which is reciprocal in the cylinder 'film and, centrally axed to the rod d3, there is a piston 44 which is reciprocal in the cylinder 39.

In the end wall of the cylinder 39 adjacent the piston d2 there is provided a valve i5 which is inwardly opening and which is maintained normally closed by means of a spring 5. In the end wall of the piston 39a adjacent the cylinder 4ta a like inwardly opening valve 45a is provided and has a spring 43a for normally maintaining the same in closed position.

The piston rod 43 is provided with a longitudinal passageway 4l, as shown in Figure 3, which passageway communicates with an enlarged hollow member t3' which extends through the piston 42 and with an enlarged hollow member 48a which extends through the piston 42a. The member 43 is provided with a plurality oi openings is which communicate with the interior of the cylinder 39 and the member lita is provided with a plurality of openings 59a which communicate with the interior 39.

The outer end of the member d3 is provided with a valve t which is normally closed and the member d8a is provided with a like valve 50c which is likewise maintained normally closed by means of a spring ta, it being understood that a like spring is provided for the valve 50.

In operation, it will be apparent that as power is applied to the lever I!) to reciprocate the shaft i3 first in a direction to the left as viewed in Figure 2, that fluid within the casing i9 will be compressed thereby insuring the closing of the valve 2S and at the same time moving the cylinder valve 2 to the left to seat upon the element 25. At the same time, the valve 32 will be opened and fluid will be forced through the pipe 4| and will cause the closing of the valve 5U upon its entrance into the cylinder d. This action will move the piston i2 to the left as viewed in Figure 1 and consequently will movethe piston 44 to the left in the cylinder 33 and the piston 42a to the left in the cylinder ella. As this action occurs the valve i5 will be opened against the action of the spring 45 thereby drawing fluid into the cylinder 39. This action will also cause the excess fluid from the left side of the piston 44 in the cylinder 35 to pass through the openings !lgd and thence into the pipe da through the valve 5a. This excess fluid will then enter the casing lea closing the valve 32a and moving the piston-like valve A21a to the left as, viewed in Figure 2 thus allowing fluid to pass through the passageway 24a into the extension 20a and thence through the passageway 23a and through the valve 28a. Some of such fluid will ll into the cylinder i5 as the piston moves to the left. However, the excess fluid which is not needed to lill in behind the piston IT as it so moves to the left will pass through the pipe Zia to the storage tank 22.

Upon a movement to the right of the shaft I3 upon its next stroke, the reverse of the action above described will take place and the excess fluid Will pass through the pipe 2| into the storage tank 22. Thus it will be seen that upon each stroke of the shaft I3 in either direction a certain amount of fluid will be delivered to the tank '22. If, at any time movement of the shaft I3 and its attached pistons i6 and I1 should get out of synchronization with the rod 43 and its attached pistons, any excess of fluid will be delivered to the storage tank 22 through either the pipe 35 or the pipe 35a, the relief valve 3'! and/or 31a functioning to allow such passage of excess fluid.

In the form of the invention illustrated in Figure 4, the pipe da, is shown as being relatively larger than shown in Figure 1, for example, and the pipe il is shown as mounted concentrically therein for the greater part of its length to conserve space, it being understood, however, that the pipes li! and Illa have identical connections with the cylinders dil and 43a and with the casings I9 and lila as is shown in Figure l.

While but certain forms of the invention have been shown and described herein, it will be readily apparent to those skilled in the art that many minor modifications may lie-made without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

l. An apparatus of the character described comprising a motor having a pair of cylinders, a piston in each of said cylinders, a shaft interconnecting said pistons, and a pump having a relatively large cylinder, a relatively small cylinder interiorly connected with said large cylinder at each end thereof, a piston in each of said small cylinders and a piston in said large cylinder and a piston rod interconnecting the pistons in said large and small cylinders, a pipe interconnecting one cylinder of the motor with one of the smaller cylinders of 'the pump, a pipe interconnecting the other cylinder of the motor with the other smaller cylinder of the pump, an inlet valve at each end of the larger cylinder, a storage tank, a pipe connecting each of the cylinders of the motor with said tank, and means for delivering fiuid drawn into said pump to said tank, said means including a passageway through the 'rod in said pump, means forming a perforated compartment connected to said rod and vconnected adjacent the inner side of each of the smaller pistons in said pump, said smaller pistons each having a centrally disposed opening therethrough, and a spring-closed valve upon the outer side of each of said smaller pistons for controllinglthe passages in such smaller pistons.

2. An apparatus of the character described comprising a motor having a pair of cylinders, a.

one cylinder of the motor with one of the smaller ycylinders of the pump, a pipe interconnecting the other cylinder of the motor with the other smaller cylinder of the pump, an inlet valve'at each end of the larger cylinder, a storage tank, a pipe connecting each of the cylinders of the motor with said tank, means for delivering Iiuid drawn into said pump to said tank, atpair of reliepipe's interconnecting said motor and said tank, and a pressure-relief valve in each of said relief pipes, said means including a passage through the rod in said pump, a perforated compartment in said rod adjacent the inner side of each of the smaller pistons in said pump, said smaller pistons each having a centrally disposed opening therethrough, and a spring-closed valve upon the outer side of each of said smaller pistons for controlling the passages in such smaller pistons.

References Cited in the le of this patent UNITED STATES PATENTS 5 Number Name Date Rocklifl et a1 Sept. 20, 1892 Corey et al Apr. 7, 1925 Bowling Aug, 18, 1936 Richards et al June 20, 1939 OHarah Nov, 16, 1948