US912503A - So-called reducing-valve. - Google Patents

Description

c. E. SQUIRES; SO-GALLED REDUCING VALVE.

APPLICATION FILED MAY 11, 1 908. 912,503. J Patented Feb. 16, 1909.

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J a Iowan-roe A'r 'rss'r "BY Arfvs.

UNITED STATES PATENT OFFICE.

CHABLESEi' SQUIEES; GLEYELAND, OHIO;

S OQCALLED' GING-h-VALVE'.

Specification'of Letters Patent.

Patented-Feb. 1 6, 1909.

Application filed May 11, 1908.; Serial ,No. 432,096.

tion is such that it serves to reduce the pres-' sure of any of the commonly confined fluids, such as steam, air or ga and. to maintain any desired pressure below initial pressure regardless of what the initial pressure may be.

In the accompanying drawings, Figure 1 is a side elevation of the parts. comprising my invention, and Fig; 2 is an enlarged sectional elevation lengthwise-of thedevice as it is shown herein. a

'lhe invention as thus shown is comprised in a number of essential and. co-acting parts which may be arranged in the exact manner shown or in such equivalent'manner as will give the same results substantially, but the presentillustration serves to present .the invention in a practical-working form. '1herefore, asshown, the invention comprises a suitable casing, C, which comprehends .the-

main or supportingpart to which theother parts are brought and with which they are operatively associated as will now appear. 'lhus the pipe P represents the inlet pipe and pipe P the outlet pipe from said casing, and

7 represents the main or reducing valve.

A passage through the casing from one pipe to the other is provided with a valve seat 2 removably fixed in said passage, in this instance, and provided wit a bearing for the stem 3 of said valve, which is further supported from valve rod R by a cotter pin 4, or

its equivalent, through the annular extension 5 of the valve and the end of rod R on which said extension is sleeved. Said rod is further supported in a suitable bearing 5,.

in the casing and a head 6 thereon has stems 7 working in a portion of casing 0. Diaphragm D bears against said head and is confined about its edge in said casing. A limited but sufliciently large chamber is provided in said casing O to operatively accommodate said diaphragm and headfi and afiord play to open and close main valve V,

and a spiral spring aboutrod R in a cup 7' of the casing afl'ords a counter spring pressure as to said diaphragm and head and thus holds said valve open normally, or when artificial pressure is withdrawn. or diminished on said; diaphragm. As-shown a fluid pressure space,- 8 also is: provided in casing O in advanceof said diaphragm and separated therefrom by an apron-.or wall 9 having a passage-10. to admit fluid pressure to the diaphragm when pressure is desired. Such pressure proceeds from themain source or supply open topipeP, and a pipe connection 12 having a controlling valve 13 therein proceeds-from said main source through an interposed coupling member E, seated in casing C and provided with a branched fluid passage for both inlet and exhaust from and to chamber 8 as thewor'k may require. '1 he pilot valve 14has a seat 15in this coupling, in connection with which it controls the exhaust from chamber 8, through pipe 16. From pipe 12 the fluid traverses coupling E through passage 17' beneath the pilot valve to; pipe. 12, which opens into the top, of chamber-8, where-there is empty space for the pressurefluid, air, gas, orsteam over the liquid in the-lower portion of said chamber andnext to diaphragm D, flooding the exposed surfaceithereof, A hand controlled exhaust is provided from the top ofchamber 8,-by'pipe-18, and valve 19, but automatic action is through valve controlled coupling E. 'Ihepilot valve 14 is automatically con: trolled through its rod 20 and head 21 having a diaphragm 22 over the same and which is exposedto fluid pressure on its top through inlet passage 23 entering said tubularmember G which is supportedover or upon coupling E. A spring 24 about rod 20 sustains head 21 as against the pressure of diaphragm 22 and lifts the pilot valve from its seat when pressure on said diaphragm is re-' laxed, as shown.

The reduced pressure, so-called, or pressure beneath initial pressure, automatically controls itself by its action upon the diahragm 22 of the auxiliary or pilot valve.

he reduced pressure is applied through inlet 23 and resisted on the other side of the diaphragm by spring 24, which is adjusted to the pressure by the adjusting nut 25. In use the diaphragm of this auxiliary valve is balanced between the spring and the reduced pressure, the slightest change of which affects the diaphragm.

The operation of the pilot valve is as follows: Steam at initial pressure slowly asses the plug 26 of the pilot valve and bui ds up pressure on main diaphragm -D' and thus closes the main valve V. 'ihen as the re-.

duced pressure falls belowthe determined point it is overcome by the spring 2e under the auxiliary diaphragm, which unseats the pilot valve and allows the pressure on the -main diaphragm to exhaust to atmosphere through the exhaust port 16. Then the .main valve opens again until, as the reduced.

pressure passes the desired point, the whole operation is repeated. For clearness this action is described as intermittent. It is found in practice, however, that both the pilot and the main valves remain slightly open, and as a consequence there is a continwise of said casing and a valve on one end thereof adapted to said seat, and a diaphragm in said chamber fixed/on the other end of said rod and a spring in "opposed relation to said diaphragm, in combination with means to sustain fluid pressure against said diaphragm comprising a ipe connection from said inletpipe to said d iaphragm chamber and a pilot valve in said connection adapted to automatically control the pres sure in said diaphragm chamber.

2. In pressure reducing mechanism, a' cas-' ing havin a fluid assage through the same at one en and a 'aphragm chamber at the other end and inlet and outlet pipes open to said passage, a reducing valve located in said assage between said pipes and a rod carrymg the same, a diaphragm on said rod 1n said chamber adapted-to press the valve to I its seat and a spiral sprin op osed'to said diaphragm to open the sai va ve, in combinatlon with an exhaustpassage .from said comprising a pilot valve adaptedio seat therein, a diaphragm chamber and a diaphragm therein operatively connected with said pilot valve, and a fluid passage to said diaphragm chamber open to the reduced pressure in said outlet valve.

spectively, and a diaphragm-chamber at its other end and a diaphragmftherein, a main valve. for said seat operatively connected with said diaphragm and a spring counter to said diaphra m, in combination with means to regulate t 1e pressure onsaidxdiaphragm and main valve comprising a fluid conveying pipe from said inlet pipe to said diaphragm chamber, a pilot valve located in the line of said pipe and a plug thereon to controllthe flow of pressure fluid to said diaphragm chamber, and a reduced pressure diaphragm and a spring oppositely and operatively-connected with sax pilot valve. p

4. A reducing valve mechanism comprischamber and means to control said passage mg a'maih valve and a-diaphr'a m to close the same and a spring to open t e valve, a fluid inlet passage from initial pressureto said diaphragm and an exhaust from said passage, in combination with apilot valve] controlling said, exhaust and a plug thereon controlling the said fluid inlet passage, a diaphragm operatively connected .with said pilot valve and a reduced fluid pressurepassage open thereto, and a counter spring for each of said diaphragms adapted to keep the .said valves normally open. i

In testimony whereof Isign this specifica-,

tion in the presence of two witnesses.

CHARLES SQUIRES Witnesses: E. M. FISHER,- F. MUssUn.

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