US1967746A - Pumping mechanism - Google Patents

Description

July 24, l934 R. o. DuLANl-:Y

` PUMPING' MECHANISM 5 sneeis-sheet 1 Filed June 6, 1955 July 24, 1934. R. o. DULANEY I PUMPING'MECHANIS 3 Sheets-Sheet 2 Filed June 6, 1935 R. llnuzey July 24, 1934- R. o. DULANEY v 1,967,746

PUMPING MECHAISM Filed June 6, 1933 3 Sheets-Sheet 3 jg/J3..

(la Y luvluney Patented July 24, 1934 UNITED STATES PATENT OFFICE 8 Claims.

This invention relates to pumping apparatus and particularly to that type of pumping apparatus wherein the liquid is elevated by fluid pressure instead of being displaced by a motor operated piston in the usual manner.

The general object of the invention is to provide a pump of this character in which a double piston is provided operated by motive iluid and in which valves are provided for directing motive fluid alternately against one or the other piston to cause the reciprocation of the pistons and provide automatically operating valves for di-- recting the motive fluid alternately against one or the other of the pistons and alternately opening or closing the passage through the corresponding discharge pipe from the respective cylinders within which the pistons operate.

A further object is to provide novel means for automatically actuating said valves by the pressure built up in the respective ow lines.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein:-

Fig. 1 is an elevation of my pumping mechanism, the main valve casing being shown in section;

Fig. 2 is a front elevation of the structure shown in Figure 1;

Figs. 3 and 4 are fragmentary elevations of a portion of the valve operating mechanism in two positions; y

Figs. 5 and 6 are elevations of the disk attached to the valve and showing this disk in two positions, the valve stem being in section;

Fig. 7 is an elevation of the lower end of the pumping apparatus partly broken away;

Fig. 8 is a sectional view on the line 8--8 of Figure 7, the parts being in elevation;

Fig. 9 is a sectional view on line 9-9 of Fig. v7;

Fig. 10 is a section on line 10-10 of Fig. 7;

Fig. 11 is a section on line 11--11 of Fig. 7;

Figure 12 is a section on the line 12-12 of Figure 7.

) Figure 13 is a diagrammatic outline gure showing the complete lay-out of the pump, portions of the figure being broken away.

Referring to these drawings, l0 and 11 designate two parallel vertically disposed pipes constituting i'low lines, the pipes discharging at their upper ends. The lower end of the pipe 10 opens into a chamber 12 divided into two portions by a septum 13. Directly below the pipe 10 a pipe 14 leads from the bottom of this chamber and adjacent its lower ends carries the casting 15 the disk and valve rotate with each other.

within which is disposed the check valve cage 16 supporting the check valve 17. The pipe 11 discharges into the other compartment of the chamber 12. The two compartments of the chamber 12 are designated a and b respectively. 00 Extending upward from the chamber 12 is a cylinder 18 and extending downward from the chamber 12 is a cylinder 19 in line with the cylinder 18. The upper end of the cylinder 18 carries upon it a casting 20 the upper end of which 65 communicates with the pipe 11 and carries within it the ball cage 21 having therein the ball valve 22. Below this cage and ball valve, the casting is provided with a lateral extension 23, the downwardly turned extremity 23a of which is provided 70 with the ball cage 24 and the ball check valve 25. The lower end of the cylinder 19 carries upon it the casting 26, the lower end of which is formed with an inlet opening controlled by a ball check valve 27, and above this check valve 27 the cast- 75 ing 26 opens by means of a port 28 into the lower end of the casting 15 which forms an extension of the pipe 14.

Intersecting the flow pipes 10 and 11 is a cylindrical valve casing 29 containing an oscillatable 80 cylindrical valve 30. One end of the valve casing is closed by a screw-'threaded plug 31 and the opposite end of the valve casing by a screwthreaded plug 32. The valve 30 is mounted upon ball bearings 33 within the casing. One end of 85 this valve is provided with an outwardly extending stem 34 and mounted upon this stem is a disk 35. The stem is keyed to this disk so that The stem 34 extends out beyond the disk and carries 90 upon it a disk 36 which is loosely mounted upon the stem. 'Ihe disk 36 is formed with an arcuate slot 37 and the disk 35 is provided with a pin 38 extending into this slot. The disk has a limiting slot 35a into which a stop pin 29a extends.

Disposed below the disks 35 and 36 and on each side of these disks are the cylinders 39 and 40 within which are disposed the pistons 41 and 42 connected by a piston rod 43. This piston rod carries upon it the collars 44 which are held in 100 place by set screws and mounted upon these collars is an approximately U-shaped yoke 45. Carried upon the disk 36 is a grooved wheel 46, the U-shaped yoke engaging over this wheel and fitting in the groove thereof, the wheel bearing 105 against the inner edges of the yoke 45.

The inner edge of each leg of the yoke 45 is arcuate but these arcuate edges are eccentric to each other and intersecting at the upper end of the yoke or apex thereof. 'I'he wheel 46 turns 110 freely upon a supporting pin 47 and connected to this pin is a link 48 to the upper end of which a contractile spring is connected, the upper end of this spring being carried upon an outwardly projecting bracket 49a mounted upon the flow pipe 10. The upper end of this spring 49 is connected to the bracket ata point which is in vertical alinement with the center of the disk 36 so that when' the pistons 41 and 42 are fully thrown in one direction, the spring with its link 48 will be shifted laterally at its lower end to one side of this vertical line between the pivotal point of the spring and the center of the disk 36, and when the pistons move in the other direction it will be shifted in the opposite direction beyond said vertical line. This spring, therefore, will always resist any movement of the yoke from a laterally thrown position to the middle position and then will assist the movement of the yoke and of the pistons in shifting it to the fully thrown position in the other direction. It will be seen that the movement of the pistons 41 and 42 will cause an oscillation of the rotatable valve 30 which will operate to alternately open and close the flow lines as will be later stated.

For the purpose of alternately shifting the pistons 41 and 42 in opposite directions, I provide the power inlet pipe 50 which is connected to a source of fluid under pressure. This pipe is connected by a nipple 51 to the valve casing 29 at the forward end of the valve casing, and, immediately opposite this nipple 51, the valve casing is provided with the nipple 52 connected by suitable elbows and connected by an elbow and a T to the pipe 10. Also extending from the pipe 50 is a branch pipe 54 which opens into the valve casing 29 and directly opposite the pipe 54 is a pipe connection 55 which opens into the stand pipe 11. The pipes 10 and 11 are connected as will be later stated to the ends of the cylinders 39 and 40.

The valve 30 has extending through it two medially disposed ports 56 and 57 disposed at right angles to each other. The port 56 is adapted when the valve is turned in one direction to connect the upper and lower sections of the flow line 10, and the port 57 when the valve is turned 90 in the other direction is adapted to connect the upper and lower sections of the flow line 11. Inasmuch as these ports 56 and 57 are disposed at right angles to each other, it follows that, when the port 57 connects the upper and lower sections of the flow line 11, the upper and lower sections of lthe ow line 10 will be out of communication with each other, and vice versa, when the port 57 cuts off communication between the upper and lower sections of the pipe 11, the port 56 will connect the upper and lower sections of the flow line 10.

Disposed to coact with the pipe sections 51 and 52 is a diametrically extending port 58 in the valve 30 and coacting with the pipe connections 54 and 55 is a diametrically extending port 59. These ports 58 and 59 are disposed at right angles to each other so that, when the port 59 communicatvely connects the pipe connections 54 and 55, port 58 will have interrupted connection between the pipe connections 51 and 52 and vice versa.

It will thus be seen that a one quarter turn of the valve 30 will connect the power inlet pipe 50 with the pipe 11 and at the same timedisconnect the upper and lower sections of the flow line 10, and that, upon a reverse movement of the valve, the upper and lower sections of the flow line 10 will be connected to each other and to the power inlet pipe 50.

Extending from the en'd of the cylinder 39 is a. pipe connection 60 which leads into the flow line 10, and extending from the cylinder 40 is a pipe connection 61 which leads into the now line 11. These pipe connections 60 and 61 connect with the cylinders 39 and 40 at their outer ends and form practically continuations of the pipe connections 52 and 55 leading the power fluid'into the cylinders.

I have used the term pipe connections to indicate continuous lines of pipe, but it will be understood that the term includes the elbows, thimbles and nipples which are necessarily used to form the various bends and angles of the pipe and that these pipe connections are such as are commonly used in water distribution systems, pumps and the like.

Disposed within the cylinders 18 and 19 are the pistons 62 and 63 connected by a connecting rod 64 so that these pistons will travel together. The lower end of the casting 26 is provided with an inlet port controlled by a check valve 27. Thus it will be seen that, upon the upward movement of 'the pistons 62 and 63, liquid will be drawn in past the valve 27 to ll the cylinder 19 and that liquid Will be discharged from the cylinder 18 past the check valve 22 and into the ow pipe 11, While upon a downward movement of the pistons 62 and 63, liquid will be forced upward past the check valve 17 by piston 63 and will be drawn into the cylinder 18 past the check valve It will be noted that the valve actuating means is such that movement of the pistons 41 and 42 is resisted by the spring 49 until the stud 46 has been moved just past a vertical line cutting the center of the support for the spring 49 and the center of disk 36. As soon, however, as the lower end of the spring 48 has passed this line, the spring will commence to contract and throw the valve quickly to its other position.

The operation of this apparatus is as follows:-

Motive fluid under pressure enters pipe 50. Assuming that the valve 30 is in position to cause port 59 to connect pipe connections 54 and 55, then motive fluid will flow through pipe 54 to the pipe 11 and through pipe 6l to cylinder 40,

also to cylinder 19, through pipe 11, forcing f piston 63 downward and carrying down the piston 62. The downward movement of the piston 63 causes the liquid below the piston to be forced upward past the check valve 17 and upward through the flow pipe 10. When the piston 63 has moved downward as far as possible or until the piston 62 bears against the casting 12, the back pressure of the incoming fluid passing into pipe 61 will cause piston 42 to move to the right in Figure 2, shifting piston rod 43 and yoke 45 to the right. This depresses the stud 46, causing a rotation of the disk 36 in the direction of the arrow in Figure 2. The disk 36 moves through an angular distance of 45 without affecting the disk 35 but when the end of slot 37 engages the pin 38, the disk 35 is also shifted and when the disk 36 is moved through 90, the disk 35 will have moved through 45, thus closing passage through the ilow pipe 1l and simultaneously closing port 59 and opening port 58.

As before stated, the spring 49 will resist the first portion of the movement of disk 36 until stud 47 has passed a vertical line cutting the supporting point of the spring and the center of disk 36 and then the spring will act to suddenly shift the valve 30 to its new position with a quick movement. As soon as the valve 30 has been shifted, motive iiuid will pass from pipe 50 downward through pipe connections 51 and 52 into pipe 10 down the flow pipe 10 and into the lower end of cylinder 18, lifting the piston 62 and at the same time lifting piston 63. As the piston 62 travels, upward, it will force liquid out through the check valve 22 and into the flow pipe 11, at the Sametime drawing in liquid through check valve 27 into the cylinder 19. As motive liquid passes into the flow pipe 10, as above described, it also passes into pipe and so to the outer end of the cylinder 39. When the piston 63 has reached its seat against the casting 12 and can move no further, the back pressure in the pipes 10, 60, 53 and 50 will cause the movement of the piston 41 toward the left in Figure 2 acting to rotate the disk 36 in a clockwise direction and eventually rotating the valve 30 in a clockwise direction to reverse the port openings of the valve. This reversal of the valve and the reversal of direction of the motive uid into one or the other of the cylinders 18 or 19 will occur automatically and will cause the alternate lifting of .the liquid in the flow pipes 10 and 11.

While I have illustrated a mechanism which I believe to be particularly effective for the purpose intended, I do not wish to be limited thereto as obviously the controlling valve mechanism might be of different form without departing from the spirit of the invention and obviously many minor details might be changed without departing from the spirit of the invention as dened in the appended claims.

While I have referred in this description to the part 30 as a single valve, it is in reality four simultaneously operated valves merely connected to each other for common movement. Thus the ports 56, 57, 58 and 59 constitute separate valves controlling passage through the iiow pipes and pressure connections simultaneously and I, therefore, do not wish to be limited to the use of a single valve for controlling passage through the ow pipes and pressure connections as a plurality of simultaneously actuated valve elements is within the purview of my invention as deiined in the appended claims.

I claim:-

1. A pumping mechanism including a pair of ilow pipes, a pair of pump cylinders, each cylinder having an inlet and an outlet connection for pumped liquid at one end and a combined inlet and outlet connection for pressure uid at the other end, the outlet connection at one end leading to one ow pipe and the combined inlet and outlet connection at the other end leading to the other ow pipe, a pair of connected pistons in said cylinders simultaneously operating in the same direction, a iluid pressure pipe having connection With each ow pipe, and pressure actuated means controlling passage through the flow pipes and the pressure connections acting automatically to close the upward passage through one flow pipe and to the pressure connection to the other flow pipe while permitting passage through the other ow pipe and the pressure connection to the closed flow pipe, said means being actuated by the building up of pressure in the closed iiow pipe.

2. A pumping mechanism including a pair of ow pipes, a pair of pump cylinders associated with the iiow pipes, a pair of connected pistons in said cylinders simultaneously operating in the same direction, each of the cylinders at its outer end having an inlet for pumped liquid provided with an inwardly opening check valve, and at this end having a connection for pumped liquids to one of said flow pipes, this lconnection being provided with an upwardly opening check valve, each cylinder at its inner end having a combined inlet and outlet for'pressure fluid to the other oi said ow pipes, a uid pressure pipe having a connection to each ilow pipe, valves controlling passage through the two ow pipes and the two pressure connections thereof, and means actuated by the pressure built up in one or the other of the flow pipes acting to shift said valves to alternately open passage through one ilow pipe and the pressure connection of the other flow pipe and then open passage through the previously closed flow pipe and the previously closed pressure connection and close passage through the rst named flow pipe and the rst named pressure connection.

3. A pumping mechanism including a pair of flow pipes, a pair of pump cylinders associated with the flow pipes, a pair of connected pistons in said cylinders simultaneously operating in the same direction, each of said cylinders having at its outer end an inlet for pumped liquid provided with an inwardly opening check valve and at this end having a connection for pumped liquid to one of said flow pipes, said connection having an upwardly opening check valve, each cylinder at its 1 inner end having a combined inlet and outlet connection for pressure iiuid to the other of said ilow pipes, a fluid pressure pipe having connections to each of said W pipes, a valve for each ow pipe and each pressure connection, the valves being 1 so connected that when the passage through one flow pipe and the pressure connection to the other ilow pipe is closed, the passage through the other ow pipe and the other pressure connection will be opened, and means actuated automatically 1 when pressure Within one of said ilow pipes has risen beyond a predetermined amount to shift said valves to close the other flow pipe and open passage through the rst named flow pipe and close passage to the pressure connection of the second named flow pipe and open passage through the pressure connection of the rst named flow p1pe.

4. A pumping mechanism including a pair of ilow pipes, a pair of pump cylinders associated with the flow pipes, a pair of connected pistons in said cylinders simultaneously operating in the same direction, each of said cylinders at its outer end having a pumped liquid inlet provided with an inlet check valve and having a pumped liquid 1 connection to one of said flow pipes and provided with an outlet check valve, each cylinder at its inner end having a combined fluid pressure inlet and outlet connection to the other of said ilow pipes, a valve for each flow pipe and each pressure con- 1 nection, the valves being so connected that when the passage through one ow pipe and the pressure connection to the other now pipe is closed, the passage through the other ow pipe and the other pressure connection will be opened, means 1 actuated automatically when pressure within one of said iiow pipes has risen beyond a predetermined amount to shift said Valves to close the other now pipe and open passage through the rst named ilow pipe and close passage to the pres- 1 sure connection of the second named ow pipe and open passage through the pressure connection of the rst named i'low pipe, and means for yieldingly resisting movement of said valve from one position to the other, said means acting after it 1 has been overcome to quickly shift the valves to the other position.

5. A pumping mechanism including a pair of vertically disposed now pipes, a pair of pump cylinders associated with the lower ends of the ow pipes, a pair of connected pistons in said cylinders simultaneously operating in the same direction, each cylinder having at one end a pumped liquid inlet provided with an inlet check valve and at this end having a connection for pumped liquid with one of said flow pipes, said connection having anoutlet check valve and each cylinder at its other end having a combined inlet and outlet connection for pressure fluid leading to the other of said flow pipes above the uppermost check valve thereof, a fluid pressure pipe having connections leading to each flow pipe, valves, one for each pressure pipe and each flow pipe, the valves being connected for simultaneous movement to open passage through one flow pipe and close passage through the other flow pipe and open passage through the pressure connection of the closed ow pipe and close passage through the pressure connection of theopen flow pipe, and means operated by the building up of pressure in the closed flow pipe actingautomatically to alternately shift said valves from one position to the other position.

6. A pumping mechanism including a pair of vertically disposed ow pipes, a pair of pump cylinders associated with the lower ends of the flow pipes, a pair of connected pistons in said cylinders simultaneously operating in the same direction, each cylinder having an inlet for pumped liquid provided with an inlet check valve and having a connection at this end with one of said ilow pipes, said connection havingan outlet check valve, each cylinder at its other end having a combined inlet and outlet for pressure fluid connected to the other of said flow pipes above the uppermost check valve thereof, a fluid pressure pipe having connections leading to each ow pipe, valves, one for each pressure pipe and each flow pipe, the valves being connected for simultaneous movementto open passage through one flow pipe and close passage through the other flow pipe, and open passage through the pressure connection of the closed flow pipe and close passage through the pressure connection of the open flow pipe, and means operated by the building up of pressure in the closed ow pipe acting automatically to alternately shift said valves from one position to the .other position, said valves comprising a tubular valve casing intersecting the flow pipes and pressure connections, an oscillatable valve body disposed in the casing and having ports constituting separate valves, the port controlling passage through one flow pipe being disposed at right angles to the port controlling the other fiow pipe and the ports for the pressure connections being at right angles to the other whereby when the valve body is rotated in one direction, passage through one of said flow pipes will be closed and opened through, the other flow pipe and passage through the pressure connection associated with the closed ow pipe will be v opened and passagel through the other pressure connection be closed, and means connected to the pressure connections above their point of connection to the ow pipes for actuating said valve including two cylinders, one for each pressure connection, pistons in said cylinders, a rod connecting said pistons, and means connected to the rod for oscillating said valve alternately in opposite directions as the connected pistons are shifted alternately in opposite directions.

'7. A pumping mechanism as in claim 6 wherein said last named means comprises a disk mounted upon the stem of the valve bodyand rotating therewith and having a pin, a disk loosely mounted on the stem of the valve body and having a slot into which said pin extends, a stud extending from the last lamed disk, and a yoke connected to the piston and engaging over said stud, the yoke having arcuate portions engaged on each side of the stud.

8. A pumping mechanism as in claim 6 whereink said last named meansv comprises a disk mounted upon the stem of the valve body and rotating therewith and having a pin, a disk loosely mounted on the stem of the valve body and having a slot into which said pin extends, a stud extending from the last named disk, a yoke connected to the piston and engaging over said stud, the yoke` having arcuate portions engaged on each side of the stud, and a spring supported at its upper end above the center of said disk and at its lower end being operatively connectedto the yoke whereby to yieldingly resist lateral movement of the yoke through half its travel an then assist the movement of the yoke.

RICHARD O. DULANEY.

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