US1665443A - Oil-burning system - Google Patents

Description

5 Shee ts-Sheet 1 J. W. CANNON OIL BURNING SYSTEM Filed Jan. 50, 1928 April 1o, 51929:;

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April l0, 1928. 1,665,443

. J. w. CANNON OIL BURNING SYSTEM Filed Jan. so, 1928 s sheets-sheet 2 Nvu., /3 f I I l I P 7; lll/0% 2J f/ f/ w f 7/ a 27 gil ff @MMM /Mf abbaia,

April 1o, 192s.

J. W. CANNON OIL BURNING SYSTEM Filed Jan. 30, 1928 3 SheetS--Shefg'aI atroz nu, 5

Patented pr. 10, 1928.

PATENT OFFICE.I

JOHN W. CANNON, F PROVIDENCE, RHODE ISLAND.

OIL-BURNIN SYSTEM.

Application filed January 30, 1928. l Serial No. 250,517.

This invention relates to mechanism for regulating the supply of fuel to a burner,

and more particularly to the constructionL of a diaphragm valve and its arrangement in a system for feeding water to a generator for superheated steam and oil to an atomizer, and for delivering the mixture of atomized oil and superheated steam to a burner included in such system,

It is the general purpose and object of the invention lto provide a system of the character referred to with an efficient diaphragmvalve and to arrange said valve in such manner in said system as to avoid danger of fire in the event of the rupture of the diaphragm and also to so construct and arrange said valve as to prevent water, as distinguished from steam, from being admitted to the atomizer and/or the burner, especially during the starting operation.

Further and more limited objects of the invention willappear hereinafter in the description, and all of the objects referred to will be accomplished by the construction and arrangement of parts shown in the drawings,

wherein Fig. lrepresents a view, partly in section and partly in side elevation, of a system or apparatus embodying my invention; Fig. 2 is a central vertical sectional view through the diaphragm valve embraced in my system; and Figs. 3, 4 and 5 are details in section corresponding respectively to the lines 3-3, 4-4 and 5-5 of Fig. 2.

The system or apparatus shown in Fig. 1 is of the same type as shown in my Patent No. 1,572,591 issued Feb. 9, 1926, and in myapplication Serial No. 85,400, filed Feb. 1, 1926, of which this application is acontinnation in part. The said system, as shown in Fig. 1, is a system for which my diaphragm valve is particularly well adapted, and it will be shown and described in relation to such system.

Describing in detail the parts shown in the drawing, 1 represents an oil tank connected by pipes 2 and 3 with a small siphon check tank 4 provided with a filling plug 4a, the pipe 2 extending to the bottom of the tank 1 and the pipe 3 extending from the top of the same. The pipe 2 is provided with a downwardly seating check valve 2a. In the tank 4, there is an elbow 5 provided with a small vent 5a to prevent siphoning of the liquid from the tank 1, and from this elbow a pipe 6 extends to a pump 7 driven by a motor 8 through a shaft 8a. From the pump 7 the pipe 8 delivers oil through a pipe 9 to a bynpass tank 10, which 4may be ofthe general construction shown in my aforesaid patent; and from the tank 10, a pipe 11 leads to an atomizer (not shown) preferably located within the burner A. From the tank another pipe k12 leads to the top of the tank 4 for the purpose of returning excess fuel from the by-pass tank 10 to the tank 4.

A pipe 13 leads from the pipe 9 to the upper endof an upper chamber B of a diaphragm valve. A pipe 15 which is supplied with water 'from any convenient source, as through an ordinary.v valved connection with vthe city main (not shown), communi- Cates with the bottom chamber B of the diaphragm valve. From the delivery side of the chamber B a pipe 15a conducts the waterY passing therethrough to a steam generator and super-heater 16 positioned within the fire box Vot a furnace Vorlieater C. rEhe pipe 15a is shown as provided with a globe Valve 15b whereby the water supplied to the super-heater 16 may be controlled by the diaphragm valve and also regulated through the manipulation of the said globe valve. From the super-heater 16 a pipe 17 conducts super-heated steam to the atomizer (not shown) within the burner A. This atomizer may be of any desired construction, but is preferably of the type shown inlmy patent aforesaid.

The burner shown herein is of the centrif.

ugal type, such as shown in my patent aforesaid, being rotated by a shaft 18, having a beveled gear 18a thereon meshing with a beveledpinion r19a on a shaft 19 driven by the motor 8.

In the operation of this system as thus far described, the super-heater 16 will be primarily heated in any convenient manner to generate steam for the initial atomization of the oil supplied to the atomizer by the pipe 11. Wratervis supplied to the superheater through the pipe 15, valve chamber B', pipe 15 and thence to the atomizer by the pipe 17. The valve in the chamber Bjwill be opened by the pressure of oil in the pipe 13 so as to permit the iiow of the water to the su- -perheater; in the event that the pressure should fall, the valve will close more or less thereby to reduce or cut off the supply of water to the super-heater. The oil in excess of that required for the burner will be de `livered fro-m the bypass tank into the tank 4.

In the operation of systems of this character it isextremely desirable that, should the diaphragm in the chamber B become ruptured, there shall be no leakage of oil, with its attendant fire risk. sirable that, should there be any leakage past the valve in the chamber B which controls the supply of water to the super-heater, suclrleakage should not be allowed to accumulate in the chamber, as this would result in supplying water to the super-heater at a` time when not necessary. or desirable, thereby flooding the furnace; Furthermore, in starting, if water should have accumulated in the chamber B because of such leaky condition, there will be an excess of water supplied tothe super-heater at a tim'ewhen the latter is not heated to :tull operating conditions, which would result in blowing a slug oi water into the burner, causing' the flame to be extinguished, or in drawing into the burner, through the atomizer, more .oil than can then be consumed. Even should the fire not be extinguished, this supply of excess water from the chamber B will set up a pulsation` in the operation of the-burner which will persist until such time as the eX- cess water can be used.

In orderto overcome these ditticulties I have constructed the diaphragm valve in the manner shown in Figs. 2-5 inclusive. Referring to these figures, 2O denotes the diaphragm which is clamped between flanges 21and 22 on'theupper and lower sections of the chamber B, respectively, the clamping bolts being shown at 23. It will be noted that the lowersection is closed, the side 24 andbottom 25 being imperforate, except that the bottom is provided with an opening 25a for the upper section 26 of a valve-operating stem. This upper valve-stem section is attached to a backing plate 27 which bears against the lower surface of the diaphragm 20, the said upper section extending through the opening 525i* and a stuffing boX therebe-* low provided by a pocket 28 formed in the bottom 25 and a packing-gland 29 threaded into the said pocket, theinterior or' the gland being filled with packing 30. J

`From the bottom of the chamber B there depend arms 31 which carry at their bottom a plate 32 having an opening which is threaded for a hub 33?L carried by the cover 33 of the chamber B. 34 denotes a pair of arms carried by and extending inwardly from the arms 31 and having attheir centers a` disk or plate 35 provided with a threaded aperture 35 into which the hub 36n of a cup 36 is threaded.` i

The upper section 26 ofthe valve-operating stem is connected to the lower section 262l by means of a sleeve 37 threaded onto the adjacent ends or said Isections, said sleeve having a liange 37 a at its upper end against which the upper end of a spring 38 bears,

the lower end of the-spring being seated ltV is also de- Y in the cup 3G. The spring 38 serves to hold i the valve-operating stem in elevated position whereby it closes or tends to close, the valve (to be described hereinafter) in the chamber B. The lower section 26a`extends through a stuiiing box of which the hub 33*L `forms a part, the other members'oi the stud- 'ing box being a cap 39 threaded on the said The bottom section of thecliamber B is provided with threaded connections 42 and 43 for the pipes l5 and l5, respectively,

and the former connection'is provided withv an inward extension 42a, which may be cast i with the bottom section of thev chamberB, said extension having a downwardly-extending nipple 42b `provided with a port 44 therethrough communicating with the chamber formed within the said` extension, they bottom of the nipple constituting a valve seat for the valve carried by the stem 26, 26a.

The valve `proper is carried by and forms i part of a yoke 45which is secured to the lower end of the valve-stem section 26a, `the .yoke receiving the nipple 43? therewithin.

The bottom or' the yoke has a cup 46 which y receives a valve disc 47, cemented or otherwise secured therein, `and which plug may be made of vulcanite or `other suitable ma.- terial. The valve is movable by the spring 3S toward the valve seat formed-by the end lUl) of the nipple 42" and is moved away from said seat by the pressure of the oil supplied on top of the diaphragm 20. i i A The yoke is provided at its bottom and beneath the valve 47 with a guide stern 48 which operates in a. combined guide and `drain sleeve 49 threaded into the bottom of is clamped between the head 48 and `the bot- A.

tom oit the yoke, while theguiding portion of the head is flattened, as shown at 48,to Y

provide a drain port 49a within and vthrough the sleeve 49 when the valve 50 is moved y away from its seat on the top of said sleeve by the spring'38. Y

I W'ith the construction-of diaphragm valve disclosed' herein, it will be evident that,

should the diaphragm 20 be ruptured, there can be no leakage of oil around the diathe closed chamber beneath the diaphragm;

hence there will be no danger of lire by vir-V tue of such rupture. Furthermore, while it kphragm valve because of the provision of y is the object to prevent leakage of water past l the lvalve (not shown) in the pipe l5 which leakage past the valve 46 and its seat at the bottom of the nipple 42h, nevertheless such leakage is apt to occur, due to the wearing or deterioration of the valve members. This leakage would result in a supply of water to the super-heater 16 under conditions which might be attended with the disadvantages referred to hereinbefore. However, when the valve 46, 42h is closed by the spring 38, the valve provided by the parts 50, 49 is open, so that liquid cannot accumu late in the chamber B to a height and under a head which will enable it to pass by leakage into the pipe 15a. Even should the ordinary hand-operated valve, which admits water to the pipe 15 from the city main, not be closed when the valve 46, 42h is closed, the worst that could happen would be a considerable discharge of water beneath the diaphragm valve. When the diaphragm is subjected tovoil under operating pressure in the pipe 13, the valve 46, 42h will be open and the valve 50, 49 will be closed.

Having thus described my invention, what I claim is:

1. In a system for supplying a mixture of oil and steam to a burner and including a generator for steam to which water is supplied; a diaphragm valve for controlling the supply of water to said generator through the pressure of the oil in said system, the said diaphragm valve comprising an upper diaphragm chamber having a connection for oil under pressure, a diaphragm in said chamber below said connection, a valve stem connected to said diaphragm, a water-valve chamberl below the diaphragm chamber and having an inlet for the water supplied to the generator and provided with an outlet connection for such water, a valve in the water-valve chamber carried by said stem and controlling the supply of water from said chamber to the said outlet connection, and a lower diaphragm chamber beneath the, diaphragm and above the water-valve cham-l ber and closed except for a substantially leak-prooi? opening for said valve stem.

2. In a system for supplying a mixture of oil and steam to a burner, and including a generator for steam to which water issupplied; a diaphragm valve for controlling the supply of water to said generator through the pressure of the oil in said system, the said diaphragm valve comprising an upper diaphragm chamber having a connection for oil under pressure, a diaphragm in said chamber below said connection, a valve stem connected to said diaphragm, a water-valve chamber below the diaphragm chamber and having an inlet for the water supplied to the generator and provided with an outlet connection for such water, a valve in the watervalve chamber carried by said stem and controlling the supply of water from said cl1am ber to the said outlet connection, a lower diaphragm chamber below the diaphragm and above the waterevalve chamber, and a stuiiingbox'in the bottom of the last-mentioned chamber through .which the valve stem passes.

3.V Ina system for supplying a mixture of oil and steam to a burner and including a generator for steam to which water is supplied; a diaphragm valve for controlling the supply of water to said generator' through the pressure of the oil in said system, the said diaphragm valve comprising an upper chamber having a connection for oil under pressure, a diaphragm in said chamber below said connection, a valve stem connected to said diaphragm, there being a chamber beneath said diaphragm and closed except for a substantially leak-proof opening through which the stem passes, a lower water-valve chamber having an inlet for the water supplied to the generator and provided with an outlet connection for such water, a valve in the lower chamber carried by said stem and controlling the supply of water from said chamber to and through the said outlet connection, and additional means operated by the closing movement of the said valve for permitting the escape of water from the said lower chamber.

ll. In a system for supplying a mixture of oil and steam to aburner and including a generator orsteam to which water is supplied; a diaphragm valvel tor controlling the suppl ot water to said generator through the pressure ofthe oil in said system, the said diaphragm `valve comprising an upper chamber having connection for Aoil under pressure, a diaphragm in said chamber below said connection,y a valve stem connected to said diaphragm, a lower `water-valve chamber having anV inlet for the water supplied to the generator and provided with an outlet connection for such water, a valve in such water-valve chamber carried by said stem and controlling the supply of water from said chamber 'to and through the said outlet connection, and additional means controlled by the movement of the said valve stem for permitting the escape of water from the said watersvalve chamber.

5. In a system for supplying a mixture of oil and steam to a burner and including a generator for steam to which water is supplied; a diaphragm valve for controlling the supply ot water to said generator through the pressure of the oil in said system, the said diaphragm valve comprising an upper chamber having a connection for oil undei1 pressure, a diaphragm in said chamber below said connection, a valve stem connected to said diaphragm, a lower water-valve chamber having an inlet for the water supplied to the generator and provided with an outlet connection .tor such water, a valve in the lower chamber carried by said stem and eontrollingthe suppl i of water to said cham` `of oil and steam to a burner and including a generator for steam to which water is supplied; a diaphragm valve for controlling the supply of waterto said generator' through the pressure of the oil in said system7 the said diaphragm valve comprising an upper chamber having a connection for oil under pressure, a diaphragm in said chamber below said connection, a valve stem connected to said diaphragm, a lower water-valve chamber having an inlet- 'or the water supplied to the generator and provided with an outlet connection forsueh water, a valve in the lower chamber carried by said stem and controlling the supply oi water to said Chamber through `the said nlet,\the chamber being provided `with a sleeve in the bottom thereof below the said valve, a stem rojeeting downwardly from said valve into said sleeve, the last mentioned stemhaving thereon a valve membervvhich is adapted 'to seat on'the top of the said sleeve when the first-mentioned valve isnioved a predetermined `distance from the inlet, there being a drain passage formed between the lastmen tioned stem and the said sleeve, below the second-mentioned valve.

7. In a system for supplying a mixture of oil and steam to a burner and including a generator for steam to which water is supplied; a diaphragm'valvefor eontrollingythe supply of water to said generator through the pressure offthe oil in said system, the said'diaphragm valve comprising a chamber having a connection for oil `under pressure, a

diaphragm in said chamber, a valve stem connected to said diaphragm, a water-valve chamber having an inlet for the water supplied to the generatorand provided with an outlet connection for `such water, a valve" comprising afvalve member in such water chamber carried by said stem and control` ling the supply oit Waterfrom said 'chamber through the said outlet Connection,r and `means permittmg the escape of Water from f the waterwalve chamber when the valve V1s in a position other than fully open'.

e.. In a system -for supplying a mixture of `oil and "steam to a burner and including a* generator for steam to which Water is supplied a diaphragm valve for controlling the supply of Water to said generator through the pressure of the oil inrsaid system, the

said diaphragm valve comprising a chamber having a connection for oil under pressure, i

signature. A

JOHN W. CANNON.

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