US739828A - Double-action feed-pump for steam-generators or other applications. - Google Patents

Description

No. 739,828. PATENTED SEPT. 29, 1903.

G. GAILLE. DOUBLE ACTION FEED PUMP FOR STEAM GENERATORS OR OTHER APPLICATIONS.

APPLICATION FILED MAY 1, 1903.

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PATE-NTED SEPT. 29, 1903.

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DOUBLE ACTION FEED PUMP FOR STEAM GENERATORS OR OTHER APPLICATIONS.

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No. 739,828. PATENTED SEPT.29, 1903.

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DOUBLE ACTION EEED PUMP EQ STEAM GENERATORS OR OTHER APPLICATIONS.

APPLIOATIOK FILED MAY 1, 1903.

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' UNITED STATES Patented September 29, 1903.

PAT T OFFICE.

DOUBLE-ACTION FEED-PUMP FOR STEAM-GENERATORS OR OTHER APPLICATIONS.

SPECIFICATION forming part of Letters PatentNo. 739,828, dated September 29, 1903.

Application filed May 1. 1903. Serial No. 155,221. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES CAILLE, engineer, of 7 Rue des Vignes, Le Perreux, in the Republic of France, have invented a certain new and useful Double-Action Feed-Pump for Steam-Generators or other Applications and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same.

In my Patents Nos. 714,096 and 714,097, of November 18, 1902, l have described an apparatus for forcing liquids, consisting of a pump-cylinder in which the filling takes place automatically by means of simple descent of liquid under a head into the cylinder of the pump from a reservoir during the upward or return stroke of the piston, the water entering below or in front of this latter, this automatic filling without counter-pressure of air and vaporized liquid being rendered possible by means of a free passage to the atmosphere through a communication which opens automatically when the liquid enters and shuts automatically directly the piston begins its working stroke. I then described twoforms for the practical application of this principle.

The present application fora patent is for the purpose of securing the rights to a new tion pump.

A form of the new construction is repre sented in detail on the accompanying drawings, in which Figure l is a sectional elevation of the whole. Fig. 2 is a section through A B O D of Fig. 1. Fig. 3 is a partial section through E F of Fig. 1. Fig. etis a section through G H I of Fig. 3. Fig. 5 represents a part sectional elevation of the double-action feed-pump combined with an arrangement for varying the discharge and at the same time avoiding any admission of air into the generator, the pump being directly operated by the movement of the engins-shaft.

The apparatus consists in principle of the pumpbylinder itself, f, which is provided at its lowerend with a spring-closed valve a, forming the discharge-valve, admission to the cylinder taking place through an annular re-.

cess and a circle of openings 0. Above this circle the pump-cylinder is prolonged intoa cylinder a, also made to fit the piston 29, which, as will be seen later, is characterized in this way, that in its downward stroke it is simply a piston, while in its upward stroke it is at the same time a piston and the movable barrel of a pump. For this purpose it is made in the form of a hollow vessel, as is indicated in Fig. 1, and its rod 1) isled through a projection d of the cover 6. This projection nearly fills up the hollow of the piston; but between it and the piston there is an annular space it.

A casing j incloses the pump-cylinder-f, forming around it a chamber Z, Fig. 2, which communicates with the atmosphere by means of a pipe 15, which pipe is raised above the level of the water in the feed-reservoir. This chamber does not communicate with the discharge-passage g. In this latter is placed a spring-loaded valve m, which separates it from the hollow h of the piston p and chamberat. A pipe q, in communication with the atmos phere, is led away from this chamber n, but is separated from it by a floating valve 7'. The water coming from the feed-reservoir enters the apparatus by the pipe '5, Figs. 3 and 4:, and fills the chamber 3, fromwhence it rises in the pipe t up to the level of the water in the reservoir.

Suppose the mechanism to be in the position shown in Fig. 1. The pistonp is at the top of its upward stroke and the hot water with which the chamber Z is filled descends through the openings 0 into the pump-cylinderf. The air-bubbles and steam produced from the hot liquid escape into the pipe t, where they condense. When the piston in its downward stroke covers the openings 0, the forcing of the water in the cylinder of the pump takes placethrough the pipe g on account of the valve 0 being pressed down. When the piston is at the end, of its stroke, the upper edgeof the hollow piston uncovers the openings 0 and the hollow becomes filled with hot water in the same way that the ICO through the floating valve r, which now falls away from its seating by the action of its own weight. Directly the piston 29 in rising again recovers the openings 0 it forces the water from the hollow h and the chamber at. The

sectional area of the annular space is equal to the opening of the valve m. This opens and the liquid forced during the upward stroke escapes through the pipe g. The floating valve '1' shuts by the bouyancy of the water immediately the chamber n is entirely filled with water and freed of steam.

The piston 19 of the feed-pump in certain installations receives its motive power by a transmitter connected with the shaft of the main engine instead of being operated by an auxiliary engine. In this case since the number of revolutions of the engine are maintained constant by a governor, while the supply of feed-water must be varied in proportion to the work required of the engine, it is indispensable to be able to vary the discharge of the feed-pump by checking the water-supply. If while this checking is taking place the pipes q andt were left open to the air, the consequence would be that, the pump-cylinderfnot being entirely filled with water,

air would be forced into the boiler. Such an operation would be objectionable. To avoid this disadvantageous action, the simple arrangement represented in Fig. 5 is connected with the feed-pump. In the example represented in this figure the piston-rod b of the feed-pumpj is connected by a transmitter 2 3 4 5 6 to the shaft 1 of the engine. ter coming from the tank 12 before entering the feed-pump by the pipe 1' flows down a pipe to into a heating arrangement .20. The waste steam from the engine-exhaust enters this heater through w and after being condensed escapes through 2. The heated water flows through the pipe y, connected to the admission-orifice 1', after passing through a valve 8. The pipes 25 and (1 instead of being open to the air open into the upper portion of a receiver 7, placed above the heater a; and into which the water rises to the level of the water in the tank 0;. At the upper end of the pipe 8, which connects the heater with the receiver, is placed a non-return valve, 9. At the top of the receiver 7 is placed a valve 10, which tends to be held constantly open from within outward by the action of a spring.

In the ordinary Workin g, since the valve 10 is always raised, the steam arising from the cylinder of the pump escapes into the air through the top of the receiver 7. If the entry of the water into the feed-pump is checked by means of the valve 8, the pump-cylinder f becomes only partially filled with water, and the downward stroke of the piston 1) causes an aspiration in the pipes q and i; but at the same time a similar aspiration is produced in the chamber 11, the valve 10 shuts under atmospheric pressure, and only the steam given ofi by the water in the receiver 7 is drawn into the pump.

In the case when the feed-pump works by The wasuction without pressure it may happen that the steam given 0K in the chamber 11 by the liquid of the receiver7 is not at atmospheric pressure. The result would be an aspiration of water from the heater into the pipes t and g. This aspiration is rendered impossible by the non-return valve 9, which then presses against its seating, while normally it is held down by a spring in order to give free passage to the water. I

It is apparent that with an apparatus as described a double-action feed-pump is obtained capable of forcing water or any liquid at any temperature without the possibility of the steam rising from the hot liquid being able to hinder in any way the operation or supply of the apparatus.

I claim 1. An apparatus for forcing liquids, consisting of a pump-cylinder f, a cylinder a forming an extension of said cylinder f, an opening 0 between said cylinders, a chamber Z communicating with said opening, said chamber being connected to a source of supply, a piston 19 formed with a chamber in its upper part, a chambern above said piston connecting with the chamber in said piston, and a discharge-pipe connected to the chambers formed in the cylinders a and f whereby on the downward stroke of the piston the water in the chamber in the cylinderf will be discharged and on the upward stroke the water in the chamber at will be discharged, the water flowing into one chamber while the water in the other chamber is being discharged.

2. An apparatus for forcing liquids, consisting of a pump-cylinder f, a cylinder a forming an extension of said cylinder an opening 0 between said cylinders, a chamber l communicating-with said opening, said chamber Z being connected with a source of supply, a discharge-pipe g, a valve 0 in the bottom of cylinder f, connecting said cylinder with the pipe g, a pipe 6 located in the top of chamber Z, a piston 19 formed with a chamber in its upper part, said piston being adapted to slide in the cylinders a and f, a

projection 61 extending down into the cylinder a, said piston having a stem which passes through said projection, a chambern between the cylinder at and the projection 01, said chamber n connecting with. the chamber in the piston, a passage extending from the chamber 77, to pipe 9, a valve m controlling said passage, a pipe q located in the upper part of the chamber n, and a floating valve 1 in said pipe.

In testimony whereof I have hereunto set my hand .in the presence of two subscribing witnesses.

CHARLES OAILLE.

Witnesses:

ANDRE MOSTIOKER, AUGUSTUS E. INGRAM.

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