US527575A - Reducing-pressure valve and regulator - Google Patents

Description

A (No M5551.)Y

E. J. WOOD. REDUOINGPRESSURE VALVE AND REGULATOR.-

vPatentedlwt. 16, 1894.

. NITED` vSlrims PnrrnNtr GFFIOE.

EDGAR J. WOOD, or BROOKLYN, NEW YORK.

SPECIFICATION forming part of Letters Patent No. 527,575, dated October 16, 1894. Application filed February 13, 1894.: `Serial No. 500,065. (No model.)

To all whom it may concern:

Be it known that I, EDGAR J. WOOD, vof Brooklyn, in thecounty of Kings and State of New York, have invented a new and useful tors in which provision is made for transmit-l ting an abnormal pressure on the low pressure side of the valve to a diaphragm whichv controls a valve for the admission of pressure from the high pressure side to the back ol" the main valve, to throw the same toward its seat and thereby reduce low pressure side.

A practical embodiment of 'my invention is represented in the accompanying drawings,

in whichl Figurel is a View of the valve in longitudi-l nal section, the wall being partially brokenV away in proximity to the head piece to show the upper portion of the second passageway. Fig. 2 is a View of the same in transverse section, through line x, of. Fig. 1'. Fig. 3 is a detail sectional view. v

. My invention contemplates a valve which may be utilized eitherin connection with the supply of a fluid under pressure as simply a reducing valve and also with a pump for the purpose of regulating the pressure inthe means of a spring H inserted between 'its compression chamber. A pipe section A, yprovided-fas is usualat its opposite ends with screw threaded sockets a and a for the purpose of connecting therewith transmitting pipes, is provided with an interior diaphragm a2 for separating the high pressure chamber B from the low pressure chamber B.r The diaphragm a2 is provided with an opening around which is, formed a valve seaty a3 on which a main valve C is adapted to seat. The section A is'provided with an extended hollow neck a4 within which the valve C is fitted to reciprocate toward and away from its seat as. Y

The valve C is provided at its face with an extended guide stem c adapted to t and slide in a socket a5 projecting inwardly from the wall of the section A.

' A head piece D isprovided with a-screw the pressure on the louter end of the head piece D over the cham- `ber D by means of -a cap piece G screwed onto the Outer end of the-head piece;

, 'i The auxiliary valve E is returned toits nort mal position (shown in Fig. l) by means of a vspring h inserted between the nut e and the i adjusting end e2, having a screw threaded engagement with 'the interior of the cap piece Gand, for purposes of increasing or diminishing the tension of the spring h upon the valve gE, I leave an opening g in the top of the cap j piece in order that a tool may be inserted into 'a recess e3 in the end e2 for turning'it toward Aor away from the end e', according as it is `desired to increase or diminish the tension.

P threaded extension d adapted. to screw into :'theouter end of the neck 0.4 and form a closfure for the same. The said head piece is also vprovided with a hollow outer portion df forming a chamber for the reception of the Huid .which is to operate the valve controlling diaphragm, andin its inner face the said head =piece D is provided with a socket or chamber d2 for the reception of `the auxiliary piston- 'valve E; The stem e of the valve E extends outwardly through the bore in a central bear. ling cl3 of the head piece and through the diaphragm F with whichit is connected by a nut e screwed onto the threaded outer end ofthe stem.

.The diaphragm F is held in position at the The valve C is returned toward its seat by back and the inner end of the head piece D. kA smallconduit K leads from the high pressure chamber B along, up within the wall of the neck a4 to a point opposite an annular groove d4 around the exterior of the screw threaded extension dof the head piece, which grooved4 connects,'by a passageway k, with the 'socket or chamber d2 in which the auxil- IOO tion from the chamber at the back of the main valve, through its ports Z4, to the passageway L, leading to the low pressure chamber. When the. said auxiliary valve E, under pressure within the chamber d', is lifted by means of the diaphragm F so as to open communication between the chamber back ot the main valve C and the high pressure chamber B, it will-at the same time-close the communication between said chamber back of the main valve C and the passageway L leading to the low pressure chamber B. The valve E is limited in its downward stroke by means of an annular seat CZ?, xed at the open end of the chamber d2.

I provide the passageway L at the outer end of the neck a4 with an internal screw threaded portion Z2 for the purpose of receiving a screw plug to stop the channel L when the valve is to be employed as a pump regulator or governor and I further provide the head piece D with a screw threaded opening di for receiving a screw plug d, sothat when used as simply a reducing valve, the opening d8 may be closed and when used as a pump governor it may be opened for the purpose of connecting the chamber cZ beneath the diaphragm with the compression chamber of the pump instead of directly with the low pressure chamber B.

The screw plug may be inserted into and removed from the screw threaded portion Z2 of the channel L by removing the head piece D.

y In operation, suppose the valve to be employed as simply a reducing pressure valve, the plug CZ closing the opening d8 and the plug for closing the passageway L removed. Whenever the pressure upon the low pressure side ot the main valve exceeds the predetermined limit, its pressure underneath the diaphragm F, communicated tothe chamber CZ through the passageway L and Z will lift the diaphragm F and with it the auxiliary valve E, opening communication through the passageway K and the high pressure sideof the main valve to the chamber at the back of the main valve and at the same time close the communication between the chamber at the back of the main valve and the passageway L leading to the low pressure side of the valve. The pressure upon the opposite sidesof the main valve C will thereby become balanced and the valve C will be thrown by its own weight or by the spring I-I, or by both, toward its seat shutting 01T the supply of uid and thereby reducing the pressure on the low r haust of the fluid at the back ot the main valve out through the passageway Lto the low pressure side.

It will be observed that the auxiliary valve E, by means of its ports Z4, is at all times balanced-pso far as pressure from within the chamber at the back of the valve C is concerned.

If it be desired to use the valve as apump governor, the passageway L will be closed by the plug inserted in the screw-threaded portion Z2 and the chamber cZ beneath the diaph ragm will be placed in communication with the compression chamber of the pump by removing the plug d. The operation of the valve will be in all respects quite similar under these circumstances to that hereinbefore described, the diaphragm F being under the control of the iiuid in the compression chamber onthe low pressure side of the main valve and serve, when it exceeds the predetermined limit, to open communication between the back of the main valve and the high pressure ,side and thereby reduce the supply of act-ulating duid.

It is obvious that slight changes might be resorted to in the construction and arrangement of thetseveral parts herein described without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth, but

What I claim is l. In combination, a casing, a main valve for controlling the passage of a fluid under `fpressure from a supply to the point where it is to be utilized, an auxiliary valve seated in a chamber in communication with the space i back of the main valve, a iiexible diaphragm for transmitting motionto the auxiliary valve, p a passageway leading from the high pressure chamber in which the auxiliary valve moves, 3 passageways leading from the opposite or low pressure side of the main valve, one to the said auxiliary valve chamber and one to the diaphragm chamber, the movement of the 4auxiliary valve in one direction serving to open the high pressurepassageway and close the low pressure passageway and the movement of the valve in the opposite direction serving to close the high pressure passageway and open the low pressure passageway, substantially as set forth.

2. In combination, a casing, a main valve `for controlling the-transmission of a Huid under pressure, an auxiliary valve provided with a port extending through from its face to its back and seated in a chamber in communication with the back of the main valve,

IIO

a iexible diaphragm for transmitting motion to the auxiliary valve, independent passage- Ways leading from the low pressure side of the main valve along the wall of the casing, the one to the diaphragm chamber and the other to the auxiliary valve chamber, a third passageway leading from the high pressurev side of the main valve along the wall of the valve casing t0 the said auxiliary valve chamber, ,the movement of the auxiliary valve in one direction serving to open the high pressure passageway and close the low pressure said passageway, means for opening and closv ing either of said passageways, an opening leading to the diaphragm chamber at pleasure, and a passageway leading from the opposite side of the said partition to the auxiliary valve chamber, in combination with the main valve, the auxiliary valve, the diaphragm and the actuating springs, substantially as set forth. Y

4. The combination with the valve casing provided with a partition having an opening for the transmission of Huid under pressure and further provided with a hollow neck, of a head piece provided with an auxiliary valve chamber and adaptedy to form a closurefor the end'of the said neck, a cap piece fitted to the top of said head piece, a flexible diaphragm secured between the cap and head pieces, an auxiliary valve seated in the said chamber in the head piece and having its stem connected with the iiexible diaphragm, a traveling nut located within the cap piece, a spring interposed between the said nut and the diaphragm, a main valve seated within the hollow necka spring 'inserted between the said valve and head piece, passageways leading from the opposite sides of the partition to the auxiliary valve chamber and a passageway leading from one side of said partition to` the diaphragm chamber, substantially as set forth.

EDGAR woon Witnesses: t

FREDK. HAYNEs, GEORGE BARRY.

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