US1657807A - Automatic oil feeding and regulating valve - Google Patents

Description

3l; R528.` f 1,657,807 w. R. RAY

AuTolm'Ic 611, FEEDING 1mb REGULATING VALVE Filed Juize 26. 1926 2 Sheets-Sheet 1 TTORNEYS.

AUTOHATIC OIL' FEEDING'AND REGULATING VALVE Filed June 26. 1926 2 Sheets-Sheet 2 l Patented Jan. l31, 1928.

UNITED STATES WILLIAM RAY, OF SAN FRANCISCO, CALIFORNIA.

AUTOMATIC OIL FEEDING AND .REGULATIN G VALVE.

Application led June 26, 1926. Serial No. 118,772.

This invention relates to an automatic oil feeding and regulating valve for oil burners of the atomizin type.

In. the operation of automatic oil burners of the atomizing type, whether rotary pressure actuated or otherwise, itis common practice to automatically ignite the oil when the burner is started by means of a gas flame, an electric spark or the like. l

In order to insure ignition during the starting period, it is necessary to adjust the burner so that a rich mixture is obtained, this being usually manuallyaccomplished, and it is later necessary to reduce the oil feed 1| or mixture, as incomplete combustion would otherwise result.` It. is accordingly desir-v able,`esecially when oils of heav gravity are use to increase the oil supp y during the starting period in' order to produce this 2o rich mixture, thus making ignition prompt and positive. It is furthermore desirable to maintain this rich mixture until the teniperature of the furnace is high enoughY to sustain combustion, when the mixture may 26 be reduced to normal to insure a clear and smokeless liame. y

The object of the present invention is .to provide an oil feeding and regulating valve operable in conjunction with a burner of this 80 c aracter -which will automatically deliver a rich mixture to the burner durin-g the startingperiod; to provide a valve of this character which will maintain the rich mixture until the furnace attains the proper temperature, and further, to provide a valve of this character which will automatically reduce the mixture to normal after proper temperature has been attained so as to insure a clear and smokeless flame.

The invention is shown by way of illustration in 1 the accompanying drawings, in which- Fig. 1 is a central vertical longitudinal section of the oil feeding and regulating valve, taken on line I--I of Fig. 2.

Fig. 2 is a plan view of the automatic oil feeding and regulating valve.

Fig. 3 is a cross-section taken' on line III-III of Fig. 1.

Fig. 4 is a partial vertical section and' side elevation of the oil feeding yand regulating valve, taken on line IV-IV of Fig. 2.

Fig. 5 is a diagrammatic view showin the osition ofthe automatic feeding an. regu ating valve with relation to anv oil burner and a pump delivering oil to the same. Y

Referring to the drawinfrs in detail, and particularly to Fig. 5, A diagrammatically indicates an oil burner of the atoniizing i type,`B a power-driven pump ior delivering oil to the saine, C a storage tank for the oil, D a pipe line connecting the tank with the pump, E a check valve in the pipe line, F an oil strainer in the pi e line, and G an automatic oil feeding an regulating valve, which is interposed between the pump and the burner. 'lhc automatic oil feeding and regulating valve forms the subject matter of the present application and it is constructed and operated as follows:

Referring to Figs`. 1, 2, 3 and 4, G indicates a cylindrical shaped casing, interiorly of which is formed a cylinder 2. Formed in one side of the casing is a chamber 3f and communicating therewith is a pipe D, whereby oil from the pump B is delivered to the casin Formed above the chamber 3 is an over ow or return chamber 4 and communicating therewith is a pipe 5 which forms a return or overflow between the oil feeding and regulating valve and the storage tank C.4 Forming a communication between the chambers '3 and 4 is a passage 6. The upper end of this passage terminates in -a' valve seat 7 to receive a valve 8. This valve is normally held against the seat by means of a spi-in 9 and the tension of this-spring is ad- ]uste by means of a screw 10. g Oil pumps employed in oil burner installations of this character are usually of the rotary gear typie and they are capable of building up consi erable pressures. The ressure built.4 up by the oil when delivere to the chamber 3 is in this instance regulated and 95 controlled by the spring 9 acting' on the valve 8; .that is, if a pressure of three pounds is desired', the spring 9 is adjusted so that the valve 8 will automatically lift the moment the pressure in the chamber 3 -exceeds three 100 pounds. All sur lus oil supplied by the pumpV will thus eby-passed to' enter the chai'nber 4 and will then be returned by pipe 5 to the storage tank. The chamber 3 il also in communication `with a feed pipe 11; 105 (see Figs. 4 and 5) this being the `pipe which j delivers oil to the burner.

The automatic regulating device controlling the flow of oil through the pi e 11 to the burner isin this instance provi ed with three valves which regulate the flow, these valves being interposed between the chamber 3 and the feed pipe 11. These valves are indicated at 14, and 16, and will hereinafter be referred to as the running valve, which is indicated at 14, the starting valve, which is indicated at 15, and the automatic valve, which is indicated at 16.

Formed in the upper end of the casing are three chambers such as indicated at 17, 18 and 19. Chamber 1 9 is in communication with the overiow or return chamber 4 through means of a port 20 (see Fig. 1) and it is alsoi'in communication with t e upper end of the cylinder chamber 2. The function of this chamber will hereinafter be described. Chamber 17 is in communication with chamber 3 through means of the port indicated by dotted lines at 21 (see Fig. 1), and chamber 18 is in communication with the feed pipe 11 and also with the chamber 17 through ports 22 and 23, the liow of oil 'through the port 22 being regulated by means of the running valve 14, and the flow of oil through the port 23 being regulated by the automatic valve 16 and the starting valve 15.

By referring to Figs. 1 and 4, it will be noted that the cylinder 2 is provided with a weighted piston such as indicated at 25, and it will further be noted that the automatic valve 16 is normally held in engagement with a seat 16a by means of the piston. It will further be noted that this va ve is automatically lowered with relation to the seat when the piston is lowered throu h means of a s ring 16". The operation o the automatic oil feeding and regulating valve will be as follows:

When the burner is first started and the furnace is cold, it is desirable, as previously stated, to deliver a rich mixture to the burner so that i ltion will be insured. A rich mixture of t character is insured in the present instance as the oil under pressure delivered to chamber 3 from pump l5V iirst builds up a ressure due to the tension of the spring 9 efore the surplus can overflow and return to the tank through the pipe 5. The oil under pressure in chamber 3 is'delivered to chamber 17 through port 21 and there dischargesthrough the valves 14, 15 and 16 into chamber 18 from .wherenit is fed throu h pipe 11 to the burner, the amount of oi delivered -being re lated by the valves 14 and 15. Part o the oil under pressure is also delivered to the lower endv of the cylinder 2 through, a port 30, a strainer 31 and a discharge orifice 32. This orifice is comparatively small andcylinder 2 is accordingly filled at a fairly slow sneed. Piston is positioned at thevlower end of the cylinder when the burner is started, but as the oil slowly enters the piston gradually rises and when it finally reaches its uppermost position, as shown 1n Fig. 1, it engages the automatic valve 16 and forces it up against the seat 16, thereby automatically closing further How ot oil through the valves 16 and 15. The time required to raise the piston to its uppermost position, where it closes oil the valve 16 is controlled by the size of the orifice 32, or by providing a needle valve at this point as indicated by dotted lines at 32. It is thus possible to increase or decrease the time period for the delivery of a rich mixture to the burner.

In actual operation one and one-half to three minutes arc sufficient as the furnace usually reaches ignition temperature by that time. When the piston does reach its uppermost position and valve 16 is automatically closed, the only oil delivered to the feed pipe ,11 and the burner connected therewith will be the oil which discharges through port 22 into chamber 18. The amount of' oil there discharged is regulated by the valve 14, 'which is termed the regulating valve, and

a normal mixture is thus insured after the furnace reaches ignition temperature, the amount of oil required during normal running being regulated by the valve 14 and when once adjusted requires no further attention. The amount of oil discharging by the valve 15 is also adjusted to obtain the richness of mixture desired and requires no further attention thereafter. In other words all adjustments are made when the burner is installed and the ends of the valve stems 14 and 15 are therefore provided with key extensions such as shown at 40. The mechanic installing the burner is equipped with a key such as shown at 41, and after the mechanic has adjusted the valves, the key is removed so as to prevent tampering.

y The piston 25 remains in elevated position and the valve 16 in closed position as long as the burner is in operation, but when the burner is closed down and chamber 3 is relieved of pressure, piston 25 slowly settles back to the bottom of the cylinder. It is filled with lead or otherwise weighted to lull insure such movement. When returning it forces the oil back through the orifice 32, the strainer 31, assage 30, chamber 3 and enters the ove ow chamber 4 through a port 42. Oil is in fact dischar ing through this port at all times when the urner is in operation, but it is so small that the amount escapingv does not interfere withv the normal operation of the mechanism as a whole. `.In fact, if comparatively heavy crude oil is being burned, it is also desirable to form a port in the piston as indicated at 25. This port serves the same function as'the port 42 and accordingly permits 4the piston to set tle more rapidly into ino erative position. The communication forme between the upper end of the cylinder and the chamber 19 lll is to permit oil to freely discharge through the poi-t 25, andalso to' prevent compression at the upper end of t e cylinder when the piston moves on its upward stroke.

A burner equipped with a valve of this character requires no manual attention when it is once installed and adjusted. It automatically insures a rich mixture when the burner is started and it automatically cuts off the rich mixture or reduces it to a normal fire the momentthe furnace reaches proper temperature. A smoking fire is prevented and personal attention is entirely obvated.

While certain features of the present invention are more or less specifically illustrated, I wish it understood that various changes in form and Jproportion may be resorted to within the scope of the appended claims. I similarly wish it understood thatv the materials and finish of the several parts employed may besuch as the experience and judgment of the manufacturer may dictate or various uses may demand.

' Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. An oil feeding and regulating mechanism for oil burners comprising a casing having a chamber formed therein adapted to receive oil under pressure, an oil feed discharge pipe connected with the casing, a valve interposed between the oil receiving chamber and the feed discharge pipe adapted to regulate the How of oil delivered to the oil feed discharge pipe, a second valve also interposed between the oil receiving chamber and the feed discharge pipe and adapted to controlan excess feed of oil to the discharge pipe, means normally maintaining said second-named valve in an open position, and 4means actuated by the pressure of the oil delivered to the casing for closing said valve after a predetermined time pe-l riod.

2. An oil feeding and regulating mechanism for oil burners comprising a casing having a chamber formed therein adapted to receive oil under pressure, an oil feed discharge pipe connected with the casing, a valve, interposed between the oil receiving chamber and the feed discharge pipe adapted to regulate the flow of oil delivered to the oil feed discharge pipe, a second valve also interposed between the oil receiving chamber and the feed discharge pipe and adapted to control an excess feed of oil to the discharge pipe, a spring normally maintaining said second-named valve in an open position, a piston movable in one direction by oil under pressure delivered to the casing and engageable with the second named valve after a predetermined time period, said piston being movable in the opposite direction by gravity when oil deliver to the casing .is stopped so as to permit t e spring to again open the second named valve, and a third valve cooperating with the second-named valve and adapted to regulate the iow of oil by the second-named valve during its open period.

3. An oil feeding and regulating mechanism of' thechai'actei described comprising a casing, a chamber formed therein adaptedl interposed between the oil receiving chamber andthe feed discharge pipe, said valve being manually adjustable to control acontinuous flow of oil from the oil receiving chamber to the feed discharge pipe.

4. An oil feeding and regulating mechanism for oil burners comprising a casing having three chambers formed therein, 12owit, an oil receiving chamber, an oil discharging chamber, and an oil over-flow chamber, means for delivering oil under pressure to the receiving chamber, a valve between the receiving chamber and the overflow chamber, said valve regulating the Apressure of the oil in the receiving chamber and also permitting over-flow of excess oil into the over-How chamber, a` manually regulated valve disposed between the receiving chamber and the dischargechamber to regulate a normal iiow of oil to the discharge chamber, a second valvedisposed between the receiving chamber and the discharge chamber and adapted to control a secondary flow of oil from the receiving chamber to the discharge chamber, said valve beingv normally open, and means for automatically closing said valve at a predetermined time period after oil under pressure is delivered to the receiving chamber.

5. An oil feeding and regulating mechanism for oil burners comprising a casing having three chambers formed therein, towit, an oil receiving chamber, an oil discharging chamber, and an oil over-flow chamber, means for delivering oil under pressure to the receiving chamber, a valve between the receiving chamber and the overflow chamber', said valve regulating the pressure of the oil in the receiving chamber and also permitting over-flow of excess oil into the over-flow chamber'ga manually regulated valve disposed between the receiving chamber and theA discharge chamber to regulate a normal flow of oil to the discharge chamber, a second valve disposed between the receiving chamber and the discharge chamber and adapted-'to control a secondary flow of oil from the receiving chamber to the discharge chamber, said valve being normally open, sprin actuated means whereby said second named valve is normally maintained in an open position, a cylinder in the casing, and a piston in said cylinder, Said piston being gravity actuated to normall l. remain in one end of the cylinder and sai piston being movable in the o postc direction by oil underpressure w en oil is delivered to the receiving chamber said piston during such movement adapt/ed to engage the second named valve and move the same to a closed position at a predetermined time period after oil under pressure is de-y livered to the receiving chamber.

WILLIAM R. RAY.

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