US822276A - Pressure-regulated supply-valve. - Google Patents

Description

No. 822,276. PATENTED JUNE 5, 1906.

E. D. HODSDON.

PRESSURE REGULATED SUPPLY VALVE. APPLIUATION FILED Nov. 2o, 1902.

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:,E. D. EUDSDUN. PRESSURE REGULATED SUPPLY VALVE.

APPLICATION FILEDV NOV. 29. 1902.

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Inoervbor Ernest, DsHocdorj, f

(Dit/messes ff/f ERNEST D. HODSDON, OF'LYNN, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO GENERAL ELE NEW YORK. i

CTRIO COMPANY` A CORPORATION OF PRESSURE-REGULATED SUPPLY-VALVE Specification of Letters Patent.

Application filed November 29, 1902 Serial N0. 133,199.

Patented June 5, 1906.

To all whom it may concern.-

Be it known that I, ERNEST D. HonsDoN, a citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful Improvements inPressure-Regulated Supply-Valves, i which the following is a speciication.

. This invention relates to steam-generating apparatus, and especially to flash-boilers W erein the supply of water must be regulated in accordance with the demand upon the boiler. Various devices for accomplishing this automatically have been devised, such, for instance, as causing the boiler-pressure to open a by-pass in the feed-pipe when the pressure reaches a predetermined maximum. 1

My invention aims to effect a regulation of the Water-supply by causing the boiler-pressure to automatically close a stop-valve in the suction-pi e of the water-pump. As the pump is usual y arranged to operate continuously, this requires it to work agalnst a'vacuum Whenthe valve is closed but in practical operation I find that this is not objectionable. In the accompanyin drawings, Figure 1 is a diagrammatic view oa flash-boiler, engine, pumps, and tanks with my invention ap lied thereto. Fig. 2 is a section of the regu ator on a larger scale. Fig. 3 is a cross-section of the same on the line 3 3, Fig. 2; and Fig. 4 is a cross-section on the line 4 4, Fig. 2.

The flash-boiler is of any suitable construction, the one shown being of a well-known type, having an asbestos-lined shell 1 inclosing e steam-generating coil 2 and the superheating-coil 3,located aboveava orizingurner4 for liquid fuel, which is su p ied by a pump 5 from a reservoir 6, in whic an initial air-pressure is maintained by a hand-pum `7. A valve 8 permits the fuel to be fedp to the burner by the air-pressure only, if desired, cutting out the ump 5. The valve ma also be used .as a y-pass to regulate the e fective delivery ofthe fuel-pump.

The steam is led from the superheatingcoil to the engine 9, from which the exhaust ypasses to a superheater 10 and thence to a downdraft-ilue 11. The engine is governed by a throttle-valve and is belted or otherwise mechanicall 12, on whic is an eccentric or the like for connected with a shaft or axle' driving the water-pump 13 and the oil-pump 5. The water is carried in a tank 14, in which is located my improved feed-regulat- 'ing valve, which will now be described.

Connected with the intake end of the suc-A tion-pi e 15 is a casing 16, having adjacent to the en of said pipe a cylindrical chamber 17. Inlet-ports 18 open into said chamber, and a port 19 connects it with the end of the suction-pipe. A ball-valve 20 fits in said chamber and controls the port 19 byclosin upon a conical seat 20', surrounding sai port. Attached to said valve is a stem 21, which is provided with a head, preferably in the shape of a nut 22, screwing on a screwthreaded portion of said stem. A helical spring 23 surrounds the Stem, abutting against the nut at one end and at the other against a shoulder in the casing or a washer 24, resting thereon. The nut enables the tension of the spring to be adjusted at will, the sides of the casing having longitudinal openin s or slots 25 to permit access to Ithe nut. i lock-nut 26 may be provided, ifdesired. The end ofthe stem is connected with a movable abutment which is eX` osed to the I boiler-pressure. This is prefera ly a piston 27, fitting in a cylinder 28, formed ina casting 29,'attached to the end of the casing 16. The piston is preferably packed by waterfrom the tank entering a groove 30 in saidV piston through a small port 31 inthe castingv 29. A pipe 32, connected with the delive pipe of the Water-pump, enters the end of Ere cy inder beyond the abutment, and, if deslred, a spring safety-valve 33 is arran ed to close a port 34, opening out of said cy inder into the tank.

The water-pump is provided with the usual automatlc suction and discharge valves, the suction-valve being located intermediate the feed-re lating device and the pump, while the ischarge-valve is' located intermediate the piple 32 and the pump. By this ,arrangement t e passage of wat-er through the suction-pipe 1s controlled by the automatic suction-valve and the feed-regulating device. The latter when acting throttles the quantity of waterI fed to the pump. In other Words, two suction-valves are provided, one of which is operated by thel suctlon of the pump and the other by the ressure of the water on the delivery slde of t e latter.

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eration of the device is as iolle'wszl.

holds the ballvalve the pum 13 to The op The hehcal spring 24 normally open, allowin draw water freely from t e tank an force it into the boiler; but as soon as the demand upon the bolier is lessened to such an extent that the pressure rises to some predetermined point (say five hundred and fifty pounds per square inch) such pressure acts upon the piston 27 and overcomes the tension of the spring, which has been adjusted to yield at this pressure. The ball-valve is thus closed upon its seat 20 and shuts off the supply oi water to the pump until the boilerpressure falls sufficiently to allow the spring 24 to reo en the valve. Should4 the boilerpressure A ecome excessive, the safety-valve 33 will open and relieve it.

In case there should be a hammer-blow in the operation of the pump it can be stopped by running a small pipe 35 from the suctionpipe ci the water-pump up to a point above the water-level in the tank and providing its upper end with a minute opening to the atmos here.

y invention is described in connection with a feed-pump for Water-service, as it has great utility in t at connection; but it can be used for other purposes, if desired.

Une important feature oi" my invention resides in the fact that the power consumed in o erating the pump varies in proportion to t e demand for water, it being at a maximum when the demand for Water is greatest and decreasing as the demand lessens. When the demand for water ceases altogether, the load is practically removed Jfrom the pump. I attain the advantage referred to above by reason oi the noyel arran ement and co eration of parts previous y described. he saving of power is a most important consideration, particularly where the storage capacity is limited, as in an automobile.

In accordance with the patent statutes, I have described the principle of operation of m invention, together with the ap aratus willich I now considerto representt e best embodiment thereof; but I desire to have it understood that the ap aratus shown is only illustrative and that t e invention pan be carried out by other means.

1What I claim as new, and desire to secure by Letters Patent oi the United States, is

1. The combination with a feed-Water pump having a suction-valve through which the Water passes, of means responsive to the abnormal pressure of the water for closing the suction-valve and holding it closed so long as said pressure exists.

2. The combination with a feed-pump, of a valve on the suction side thereof through which all the Water passes, and means for automatically closing said valve when the pressure of the water 1n the delivery-pipe passes a predetermined maximum.

13L The combination with a feed-pump, of a valve controlling the suction-pipe thereof, a spring holding said valve normally open, and a movable abutment exposed 'to the pressure on the delivery sideof the pump and connected with said valve.

4. The combination with a feed-pump, of a casing connected with the suction-pipe thereof, said casing containing a chamber and ports opening thereinto, a ball-valve in said chamber, a spring act-ing to hold said ball-valve oif its seat, and a piston connected with said valve and exposed to the pressure in the delivery-pipe of said pump.

5. In combination, a flash-boiler, a pump for suplying water thereto, a suction-valve for the ump, a regulator for holding the suction-va ve closed when the boiler-pressure exceeds normal, a relief-valve, and a conduit which supplies iiuid under pressure to the regulator and relief-valve.

6. The combination with a pump, of separate suction-valves throu h which water' is drawn by the pump, one o said valves being controlled by the suction of the pump and the other by the pressure of the water delivered thereby.

7. The combination With a pum of separate suction-valves therefor, one o which is normally held open and the other operates automatically under the action of the pump, and means for closing the normally open valve when the pressure of the water delivered by the pump reaches a certain point.

8. The combination with a ump and its suction and delivery valves, o a feed-regulating valve through which water passes to the pum and means responsive to the pressure of t e Water on the delivery side of the pump which operates the regulating-valve to throttle the water sup lied to the pump.

9. In a water-supp y system, the combination of a supply-pipe, a pump therein, and a normally open suction-valve through which the supply of Water'passes to the pump and ada te to be controlled by the pump accor ing to the pressure oi the Water delivered thereby.

10. In a Water-supply system, the combination of a supply-pipe, a normally open suction-valve therein, and a continuously-open ated pump receiving its supply throu h the suction-valve .and adapted to close sai valve at a predetermined pressure of the Water which it delivers.

11. In a Water-supply system, the combination of a supply-pipe, a normally open suction-valve therein, a continuously-operated pump ada ted to receive Water throu h the suction-va ve, and means acted upon y the water delivered by the pump which is sensitive to pressure variation of the Water for controlling the suction-valve.

12. In combination, a hash-boiler, a source of watensupply, a supply-pipe connecting IOP both, a pump therein, a suction-valve between the pump and source of water-supply, and a pressure deviceA acted upon by the pump at a predetermined pressure, sald device comprising means acting initially relativel to the inuence of the water-pressure for c osing the suction-valve and means acting finally for relieving water yfrom the supply- 1 e. pll. In combination, a water-tank, a a suction-pipe connectin the two, a fee regulator in the tank at ne inlet end of the pipe for re ulating the Water fed therethrough, an means connecting the regulator wlth the delivery side of the pump which ermits the water-pressure to. control the ormer.

14. In combinatlon, a water-tank, a ump, a suction-pipe connecting the two, afee -re ulator which is located in the tank at the et end of the pipe, and which normally permits water to ass to the pum and a connection which subjects the regulator to the waterpres'sure on the delivery side of the pump for operating the regulator.

15. In combination, a water-tank, a recep- Pum y tacle, means forl supplying water from the tank to the receptacle, a regulatoi` which regulates the supply of water to said means, and a connection extending from a point between the said receptacle and said means to the regulator for subjecting the latter to the waterpressure of the receptacle.

16. In combination, a water-tank, a rece tacle, means for supplying water from tige tank to the receptacle, a regulator for regulatingthe supply of water to said means, a connection extending from a point between the receptacle andthe tank to the regulator for subjecting the latter to the pressure of the receptacle, and a relief. device in said connecttion, which is located in the tank and permits Water to pass through said connection when the regulator reaches the limit of its operation.

In witness whereof I have hereunto set my hand this 25th day of November, 1902.

ERNEST D. HODSDON.

Witnesses: DUGALD McK. MCKILLOP, JOHN J. WALKER.

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