US292177A - pug-sley - Google Patents

Description

(N -oMod'el 2 Sheets-Sheet 1.

H. S. PUGSLEY.

' VAPOR AND ATMOSPHERIG VALVE FOR STEAM PUMPS.

No. 292.177. Patented Jan. 22, 1884.

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4 H. s. PUGs LB Q VAPOR AND ATMOSPHERIC VALVE FOR STEAM PUMPS.

1m 292.177. Patented Jan. 22, 1884.

I e I c o I a a J I I WITfiESSES: I INVENTOR %W%"% L. 1 v i I ATTORNEY N1 rED STATES PATENT OFFI E.

1 HENRY S. PUGSLEY, OF BROOKLYN, NEW'YORK.

. VAPOR AND ATMOSPHERIC VALVE FOR STEAM-PUMPS.

SPECIFICATION forming part of Letters Patent No. 292,177, dated January 22, 1884.

' Application filed March 21, 1883. (No model.) I

1P0 all whom it may concern:

Be it known that I, HENRY S. PUGSLEY, of the city of Brooklyn, county of Kings,- and State of New York, have invented a new and useful Improvement in Vapor and Atmospheric Valves for Steam-Pumps; and I do hereby declare that the following specification, taken in connection with the drawings annexed to and forming part of the same, furnishes a full and clear. description thereof, sufficient to enable those skilled in the art to which it pertains to make and operate the same.

In the drawings, Figurel isaview in crosssection of a cylinder, the valves, &c., of an ordinary steampump, showing the connection of my improved atmospheric valve thereon. Fig.2 is a view in cross-section of my improvedwalve from the points where the stand-pipes rise from the diaphragm between the clearance space and the dischargespace of the steam-pump. Fig. 3 is a detail.

The object of my invention is to provide means for removing automatically atmospheric air and vapor from the space in the pump be-' tween the plunger anddelivery-valves. It is well known that although theoretically the cylinder and chambers of asteam-pump should contain only water, and that all the air should be expelled therefrom during the first few strokes of the plunger, that, as matter of fact,

. considerable atmospheric air, and, in case of heated water, large quantities of vapor or steam occupy a portion of the space between theplunger and the delivelyvalves, and that such atmosphere or vapor within. a pump not only diminishes the capacityof discharge of the pump, but by its pressure, expansion, 820.,

interferes withthe prompt acting of the valves and the full action of the plunger. 'The wellknown fact that the actual'work done by such pumps is far less than the theoretical capacity of the pump should be is due to the presence of air or vapor within the cylinders or spaces, which should be otherwise filled with water. This objection is particularly noticeable with pumps having great lift or suction, whichare also forcing against pressure, in which pumps this presence of air or vapor causes a jerking and pounding of the parts, resulting in rapid wear of the pump and in loss of suction-power. In feed-pumps forsurface-condensing engines much air is often taken in fromthe suction, and a lack of uniformity of action created, which works a rapid destruction of the small Working parts.

The object of my invention is to secure a uniformityof action, an increase in the effective work of a pump, and the removal, to a great extent, of the obj ectionablefeatures hereinbefore recited.

' Prior to my invention attempts have been made to afford a vent for the air by attaching petcocks to thedischarge-space above thediaphragm, and with good results; but my in venti on goes still further, and contemplates the removal of the vapor or air from the clearance-space on the other side of the diaphragm.

In the drawings, Figure 1, A represents a 7 section of a suction-pipe, and B of a dischargespaces, FF the induction or suction valves,

G Gthe eduction or discharge valves, H the-f air-chamber, and I I the diaphragm, of an-' Ordinary p p- The valves are gravity-valves.

The ordinary action of such a pump is, as the plunger recedes from the re spective ends, for the-water to flow intothe suction-pipe A in the direction of the arrow,

through the induction-valve F, and;passing down through the ports 0 O, to fill the clear.- ance-space between the face of the plunger and the diaphragm I. As" the plunger returns, the water is forced up through the eduction-valve G, filling the discharge-space E, and after exerting its pressure upon the air in the chamber H, being discharged through the pipe B. At the points K K in the diaphragm I, I insert stand=pipes L L, for the escape of vapor or air.

At M M are two check-valves, closing by gravity, allowing the passage of the vapor from pipes L through pipeN to the air-chamber P, and preventing any movement of the vapor in a contrary direction. In the side of this chamber I insert a petcock at the point Q, having the same adjustable, so as to allow valve. Each of them is constructed substantoo tially of the shape of a truncated cone, the area of the lower face of B being the same as that of the upper face of B, so that when the two valves are upon their seats S and S the pressure from within the chamber P will be the same upon each surface It and It, and the valve will be balanced. \Vhen, however, the valves R and R are started from their seats, the larger area of R operated upon by the pressure from the chamber will cause the whole valve to be lifted and allow the free escape of the vapor or air in l, which reaches the atmosphere through the opening T.

V is a spring, which is made to bear against thetop of the valve R, of just sufficient strength to overcome the friction of the packing-boxes \V \V, and thus return the balance-valve to its respective seats when the air or vapor has been discharged from the chamber 1. The spindle of the balance-valve extends upward through the packing-box IV and ends at 1 opposite the end of a set-screw, Z, which is so adjusted as to regulate the lift of the balance valve to just that extent necessary to allow the escape of the air or vapor. The other end of the spindle Y terminates in a tip, X,wl1ich I prefer to make with a conical apex. This tip X, I use for starting the balance-valve from its seat at the end of each stroke of the plunger 0, which can be accomplished by any of the well-known means of tripping a valve by alternate reciprocating motions. The mode I prefer to adopt is by means of a connection, a, having upon it two tappets, b b, at one end, while the other, at the point (i, is pivoted to a disk, d. This disk is pivoted at the point e, and at f is provided with a grooved roll, a crosssection of which is shown in Fig. 3. The tip X, when the balance-valve is upon its seat, just clears the edge of the disk (I, a connection between the plunger 0 and the tappets I) I) moving the connecting-rod a back and forth at the end of each stroke, moving the disk d a small segment of a revolution and lifting the balance-valve slightly from its seat, as the tip X is slightly raised by the grooved roll f passing back and forth under it.

It is obvious that when the plunger G presses the water behind it in the clearance-space the air or vapor which is therein will rise in the stand-pipe L to the highest point, and pass throu gh the ch eek-valvcs M rather than remain below the diaphragm I in the clearance-space.

The petcock Q allows a steady moderate discharge of the atmosphere or vapor, but, being open only slightly, does not relieve the pressure sufficiently to make any perceptible difference in the working of the valve G and the discharge of the water until the end of the stroke is reached, when the lifting of the balance-valve suddenly relieves the pressure, and the valve G is instantly brought to its seat, preventing the return of any water from the disehargespace into the clearance-space.

It is obvious that the petcock Q, used in combination with the vapor-pipes L N and the check-valves M, is of service, irrespective of the balance-valve, in allowing a constant discharge of the vapor or atmosphere from beneath the diaphragm Ian undertaking not heretofore accomplished, so far as I am aware, prior to my invention.

It is also obvious that the points of insertion of the vapor-pipes and the character of the valves and the method of tripping the balance-valve may be varied without impairing the principal of my invention.

The features which I claim as my invention, and which I desire to secure by Letters Patent, are

1. In combination with a vapor pipe or chamber of a steani-pump, substantially as described the airchamber l, balance-valve with its seats, and the lifting mechanism X, f, d, and a, operated in connection with the plunger C, substantially as and for the purposes described.

' 2. The combination, in a steam-pump, of a reciprocating plunger, 0, the induction-spaces A, valves F, clearance-spaces D, cductionvalvcs G, diaphragm I, discharge-space E,

vapor-passage L N, check-valve M, balancevalve with its seats S S, and the tripping mechanism a b d f, substantially as and for the purposes described.

HENRY S. PUGSLEY.

\Vitnesscs:

EDGAR A. SABBATON, B. E. VALENTINE.

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