US352482A - Joseph mooee - Google Patents

Description

' (No Model.) 2 Sheets-Sheet. 1.

J. MOORE. MODE 0P OPERATING THE VALVES 0F HYDRAULIC PUMPING ENGINES.

N0. 352,482. Patented NOV. 9, 1886 :28 I :1 INVENTUR /W@ZM 7 Wa N. PETERS. Phoio-L'nhognphcn Wnhingiun. n. a

(No Model.) 7 2 Sheets-Sheet 2. J. MOORE.

MODE OP OPERATING THE VALVES 0F HYDRAULIG PUMPING ENGINES;

: PREssun I PIPE :I

EXHAUST AND PRESSURE coLpMNs ALTERNATs -Y PIANOOR awn-crime H VALVES,CONNECTTNG PRE$5URE WITNESSES NTTED STATES PATENT Fries.

MODE OF OPERATING THE VALVES OF HYDRAULIC PUMPING-ENGINES.

SPECIFICATION forming part of Letters Patent No. 352,482, dated November 9, 1886.

application filed January 22, 1884. Serial No. 118,348. (No model.)

.To all whom it may concern.-

Be it known that I, JOSEPH MOORE, a citizen of the United States, residing at San Francisco, State of California, have invented a new and Improved Mode of Operating the Valves of Hydraulic Pumping-Engines, such as are principally used for draining mines, and are constructed with rams operating in sets of opposing-cylinders, these rams being connected with a cross-head, to which thepumping-rams are attached to operate in cylinders assigned to them, of which the following is a specification.

.To make my invention thoroughly understood, I will first explain a difficulty which has heretofore occurred with reference to the action of the main supply and exhausting valves of these engines, which'we will assume to be arranged with three cylinders set horizontally side by side, in which three rams are operated,

the two on the outside, the actuating-rams being pushed forward by hydraulic pressure acting upon their end areas to communicate motion through a connecting cross-head to a pumping-ram inthe middle. Every ram is paired with an opposing one similarly operating in an opposite direction, so that a continuous reciprocating motion is carried on as long as the controlling-valves are moved with regularity and precision.

To accomplish the proper movement of the valves heretofore an ingenious system has been arranged to effect their consecutive action in the follo wing order: First, the pressure-valves of the rams just finishing their stroke have been closed; secondly, the exhaust-valves of the opposite rams just having finished their back-stroke were closed; thirdly, the exhaustvalves of the rams commencing their returnst-roke were opened, and, lastly, the pressurevalves of the rams just commencing their forward stroke were opened. The order of the second and third action might, however, be reversed or be simultaneous.

Now, the above operation must of necessity be precise and accurate. No premature action of the pressure or exhaust valves is permissible; otherwise, as these engines generally operate under very high pressures, if the pressure is admitted when the opposite end exhaust is closed, such a shock will occur as will damage the machine, while, if the pressure'and exhaust passages are both open on the same end, there will be great waste. of water and A full description of these valves will be found in Patents No. 295,622, March 25, 1884:, and

No. 294,859, March 11, 1884, both in name of George V. Dickie. These valves controlled the action of the main valves, four pianovalves operating on the forward stroke and four on the return-stroke. Small pipes led from the piano-valves to a couple of cylinders containing rams, which were alternately moved up and down as the pressure and exhaust columns were alternately switched by thepiano-valves into connection with the upper or lower ends of these two ram-cylinders. The rams themselves were connected in the middle to the main valves by levers, so that when the rams were moved upward they first shut the main exhaust and opened the main pressure immediately afterward, and when the rams were moved downward they shut the main pressure first and then opened the exhaust.

If everything operated as calculated, the above apparatus would have been sufficient, but the difficulty soon discovered was that from various cau'sessuch as friction from bends in the pipes, &c.the velocity of the water was sometimes changed, so that the piano-valves alone were partly unsuccessful. The immediate effect of their operation could not always be relied upon, so that sometimes the pressure and exhaust valves were both open at one end of the pump at the same time; and, again, the pressure was suddenly admitted at one end before the exhaust was open at the other.

The present invention is designed to correct the above defect and provide for the absolute certainty of the main valves operating, so that the exhaust atone end will surely be open before the pressure is admitted at the other end, and that no two valves will be open at one end at the same time. This is accomplished by adding what I call intermediate valves, through which the pressure and exhaust conduits from the piano-valves will pass,and which are only opened to give this passage after the action of the prior operating main valves on 3 is a side view of the same.

the opposite end of the pump has been accom plished; or, in other words, the piano-valves will be obstructed by the intermediate valves from effecting a movement of the main valves on either end of the pump until the said pianovalves have completely finished their operation with reference to the main valves on the opposite end.

In the accompanying two sheets of drawings, forming a part of this specification, Figure 1 is a side elevation of a hydraulic pump to which my invention is shown applied. In this figure I do not follow the exact relative position of some of the parts, but place them so as to be clearly viewed. Fig. 2 is a sectional view of my intermediate valve. Fig. Fig. 4 is a side elevation of the valve system with my intermediate valves and the pipes connected therewith shown on a larger scale. Fig. 5 is a vertical section of my intermediate valve, which, with its combined parts, constitutes the invention proper, these last four figures being upon a larger scale than Fig. 1.

In all the figures like letters of reference represent like parts.

. A A are the side cylinders of the pump.

B B are the main rams.

G is the cross-head.

D is the trip-cam or inclined plane attached to or forming part of the cross-head, and which at the end of every forward and back stroke of the pump comes in contact with the projections E E on the horizontal shaft F, upon which two sets of four cams, G G, are secured, to eflfect the turning of both shaft and cams through a segment of a circle to act upon the piano-valves H H in lifting and dropping them at the moment of terminating a stroke of the pump.

I I are my intermediate valves,which have one set of pipes, J J, running to the nest of piano-valves, (one pipe being the exhaustconduit and the other the pressure,) and another set, K K, running to the valve-operating ram-cylinders L L. From the middle of the rams M M there are the levers N N, which connect with the stems of the main pressurevalves 0 O and exhaust-valves P 1?. On the rams M M are plates Q Q, which have at the upper end an inclined surface leading to a projecting step, as shown. On these plates the rollers RR travel, which rollers aresecured to the upper end of the bell-cranks S S, so that as the rams M rise and fall the bell-crankswill be swung out to correspond with the parallel distance between the face of thestep projection and the body of the plates Q.

The bell-cranks arepivoted on. the brackets T, cast on the shells of the intermediate valves, and their short ends,sta nding horizontally, rest on the top of the stems of the said valves. The intermediate valves are in pairs,

one for the pressure and one for the exhaust, so that the horizontal end of the bell-crank will be spread to cover both stems. The plates Q Q are made adjustable vertically by having,

the bolt-holes which fasten them to the rams' slotted,so that by raising or lowering the plates, the time of the action of the intermediate valves may be changed within limits.

Referring to the detail view of these intermediate valves, their construction will .be immediately understood. The valves are simply solid bits of metal turned to the shape shown, their seats being between the pipe-holes, sufficient space being allowed between the valves and their stems and the walls of the chambers containing them, to permit the water to pass by when the valves are opened: A spring below each valve keeps it to its seat to close the conduit and only when the bell-crank is swung over by the descending ram is the passage clear.

There should be adjustable set-screws U U on each bell-crank, so that the exhaust-valve may be given a hairs breadth advance in action over the pressurevalve.

Theoperation is as follows: Let us suppose the pump-rams are moving in the direction of 0 the arrow-point, Fig. 1. During the stroke the valves will stand thus: Pressure-valve 0' will be open; pressure-valve 0 closed. Exhaustvalve P will be closed, and exhaustvalve P open. Intermediate valve, I. will be open, and its companion I closed. The ram M will be down, and its. companion M raised up. When the end of the stroke is reached, the trip D strikes the projection E, and turns the cams under the piano'valve stems, and, opening these valves in consecutive order ac cordingly as the cams are set, switches the pipe leading to the bottom cylinder of the ram M to the exhaust-column, and the pipe leading to the top cylinder to the pressure-column, when the ram immediately falls, and, tipping the connected lever, shuts the pressure-valve of the pump and. opens the exhaust on that end, and at the same time opens the intermediate valve, I, connected with this end. Now action.

ing clear. The exhaust-column is connected by onepiano-valve with the top ram-cylinder, L, and the pressure-column is connected by another piano-valve with the bottom cylinder, so that the rain M is lifted, the main exhaustvalve on this end is closed, and the pressurevalve is opened, and the return-stroke. commences,the operation being reversely repeated when the other end of the stroke is reached.

What I claim as my invention, and desire to secure by Letters Patent, is as. follows:

In. hydraulic pumping-engines, the combination of the intermediate valves, I I, and their operating mechanism, substantially as described, with the main valve-actuating rams M M,,workingin cylinders L L, and the pipes J J KK, connecting said ram-cylinders alternately with. the pressure and exhaust columns, as and for the purpose described.

I JOSEPH MOORE. WVitnesses:

GEO. PARDY, WM. I. DRUM.

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