New Compressed Air Pump
A newly invented compressed air pump suitable for use in wells has for its object means whereby intermediate jets of compressed air may be automatically formed to force the water to a higher level. The pump is provided with a cylinder adapted to be submerged and having a shiftable valve moved by the difference of pressure upon opposite sides of the valve when the cylinder is full and when empty, this valve controlling the admission of air to the cylinder in order to force the water therefrom when the cylinder is full. The pump, which is illustrated herewith, it is claimed is simple in its construction and may be readily installed for use.
Referring to the illustrations Figs. 1 and 2 are sectional views showing a pump constructed in accordance with the invention; Fig. 3 is an enlarged detail sectional view of the lower end of the pump; Fig. 4 is a transverse sectional view of the lower end; Fig. 5 is a plan view; Fig. 6 is a section on the line 6—6 of Fig. 5; Fig. 7 is a section on the line 7—7 of Fig. 6; and Fig. 8 is an elevation of the upper end.
The numeral 10 designates a main cylinder having the upper end closed, as at 11. and the lower end provided with a port 12 normally closed by an upwardly opening flap valve 13. The head 1 or upper head is provided with a port 14 through which a discharge pipe 15 projects into the cylinder, this discharge pipe terminating adjacent the lower end of the cylinder and being provided with an upwardly opening flap valve 16 normally closing the same.
The numeral 21 designates a valve casing adapted to be arranged upon the upper surface of the head 11 and having ports 22, 23, 24 and 25 formed therein adapted to align with the ports 17, 18, 19 and 20 of the head 11. The ports 22 to 25 inclusive communicate with a cylindrical bore 26 formed in the valve casing, the ends of which are closed by removable heads 27, and with this bore likewise communicates an inlet port 28 and an exhaust port 29 formed in the valve body. Within the bore 26 a piston valve 30 is slidably mounted having ports 31 and 32 formed therein adapted to alternately connect the port 24 with the intake port 28 and port 23 with the exhaust port 29. The throw of the piston valve 30 is regulated by means of a screw 33 extending through the wall of the valve body and engaging in a slot 34 formed in the piston valve. The ports 22 and 25 communicate with opposite ends of the bore 26 between the ends of the piston valve 30 and the removable heads 27. With the port 22 a pipe 35 is connected terminating adjacent the upper end of the cylinder, and with the port 25 a pipe 36 is connected which terminates adjacent the bottom of the cylinder 10 and forms a balance cylinder.
The port 28 of the valve body is in communication with a source of fluid pressure supply, preferably compressed air, through a pipe 37 and the exhaust port 29 communicates with an exhaust pipe .18. The exhaust pipe .18 is preferably made of a length to extend above the level of the water when the cylinder 10 is submerged, and has its end bent downwardly, as indicated at 39, so that the trapped air therein will prevent the access of water to the valve. Since the use of the device will necessitate periodical elevation thereof above the level of the water to permit draining of the .cylinder 10 and its associated parts, the discharge pipe 15 and air intake pipe 37 are connected with the discharge point and the source of air respectively (not shown) by means of flexible pipe sections 40 and 41, and the head of the cylinder is provided with bolts 42 for the reception of hoisting cables for elevating the cylinder.
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New Compressed Air Pump
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Assuming that the cylinder 10 is lowered into the well with the valves in the position shown in Fig. 2, water will enter through the opening 12 at the bottom of the cylinder and fill the cylinder to a point approximately indicated at Z. At the same time water will rise slightly in the balance cylinder or tube 36 due to the head of water contained in the cylinder above the lower end of this tube. This head will cause compression of the air within the tube resulting in pressure being placed against the right hand end of the valve, there being no pressure above the water within the cylinder or in that space between the head 11 of the cylinder 10 and the level Z. The pressure at opposite sides of the valve is unbalanced with the result that the valve moves to the position shown in Fig. 1. If fluid pressure, such as compressed air, is being admitted through the pipe 37, this air will act upon the water within the cynlinder, causing the same to pass through the discharge pipe 15 to the discharge point. This same pressure, will act to further compress the air within the tube or balance cylinder 36, resulting in the rise of water in the balance cylinder to a point Y and at the same time in the lowering of the level within the cylinder 10. The pressure within the balance cylinder when the water in the main cylinder 10 reaches the level W at the plane of this level W is made up of air pressure on top the water column plus the weight of the water column within the balance cylinder between the levels Y and VV. Therefore, there is a difference in pressure upon opposite sides of the valve 30 equal to the pressure of the column of water between the points Y and W, and assuming these parts to be sufficiently spaced that the pressure is sufficient to shift the valve, the valve again shifts to the position shown in Fig. 2. At this point the supply of fluid pressure is cut off and the exhaust opened resulting in water again entering the cylinder 10 with the result that the operations above set forth are repeated.
Thus the pressure is unbalanced at opposite sides of the valves through the tube or balance cylinder 36 and that this action is entirely automatic, the pump operating continuously so long as the same is submerged and a supply of fluid pressure directed through the inlet 37.
The compressed air pump is the invention of Walter S. Hides, of Pine Grove, Pa., and the patent number is, 1.472,839.