US1481944A - Liquid-fuel-burning apparatus - Google Patents

Description

S. 5. WEEKS LIQUID FUEL BURNING APPARATUS Filed July 22;, 13220 32 2 Sheets-6h96?, lv

INVENTOR SHIRLEY awr-:EMS

BY f,

ATTORNEY S. S. WEEKS LIQUID FUEL BURNING APPARATUS 2 Sheets-Sheet 2 Filed July 22 1920 INVENTOR SHIRLEY S.WEEKS ATTORNEY Patented Jan. 29, 1924.

' STATES SHIRLEY S. WEEKS, OF PROVIDENCE, RHODE ISLAND, `ASSIGNOE TO ASSOCIATED EN- GINEERING & SUPPLY COMPANY, 0F SAN FRANCISCO, CALIFORNIA, A CORPORA- TION' UF CALIFORNIA.

LIQUID-FUEL-BURNING APPATUS.

Application filed July 22, 1920. Serial No. 398,226.

To all whom it may concern:

Be it known that LSHIRLEY S. WEEKS, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented new and useful Improvements in Liquid- Fuel-Burning Apparatus, of which the following is a specification.

This inventiony relates to fuel oil burning apparatus, and more particularly to automatic controlling mechanism for regulatin the intensity of the fire.

In atents No. 1,197 ,O53 of H. L. Nicholson and S. S. Weeks, dated September 5, 1916 and No. 1,314,174 of S. S. Weeks and C. D. Stewart, dated August 26, 1919, are disclosed oil burning apparatus of the above character in which the fuel oil is atomized by steam and the supply of steam and oil .to the burners is` varied by steps.

The principal 'object of the present invention is to provide an oil burning apparatus of the above character in which the oil is atomiced mechanically through the use of high oil pressure in connection with burner nozzles designed to atomize the oil under the influence of pressure.

According to the present invention the intensity of the fire is changed or regulated by varying the pressure at which the oil is supplied to the burners through the operation of one or more pressure regulating valve devices.

Inthe accompanying drawings; Fig. l is a diagrammatic view of a battery of two steam boilers and my improved oil burning apparatus applied thereto; Fig. 2 a sectional view of one of the master controller units; Fig. 3 a sectional view of a set of damper regulating units;gFig. 4 a sectional view ofone of the pressure regulaters; and Fig. 5 a sectional View of one of the pressure redl'lcing valves.

Av battery of two steam boilers 1 and 1a is shown in Fig. 1 and the furnace of each boiler is equipped with a plurality .of oil burners B designed to mechanically atomize the fuel oil under high pressure, it being understood that any number of boilers may ybe provided and that several oil burners are usuall provided -for each furnace, a1- thou for t e sake of simplicity.

only two are shown in the drawings,

. units M1 andll/l2 and the draft dempers 5 for each boiler-are controlled by* a damper regulator comprising units D1 and D?.

For reducing the pressure of oil supplied to the burners of each boiler, reducing valves .R1 and R2 and regulating valves V1 and V2 are provided. v

The units Ml and M2 of the master controller are identical in construction and each comprises a casi-ng 6 containing a diaphragm 7, subject on one side to the pressure of steam generated in the system as supplied through pipe 8 and on the opposite side to the pressure of an adjustable spring 9.

The diaphragm 7 is adapted to operate a' nects the master controller unit Ml with` the damper controller unit D1 of each boiler and apipe 17 connects the unit M2 withl the unit D2.

The damper controller units D1 and D2 are identical in construction and each comprises 'a' casing 18 containing a piston 19 with the chamber below Ythe piston, connected to the return pipe 14 and having a piston stem 20 connected to a chain 21 which passes over a sheave 22.

The sheave 22 is connected to a rod 23 for operating the damper 5 and vto a rod 24 for Operating a shaft 25, through which the ash pit doors 26 are operated.

Associated with the controlling apparatus of each boiler are regulating units V1 A pipe I16 conand V2 and reducing valves R1 and R2.

The regulating units V1 and V2 are identical in construction and each comprises a casing 27 containing a valve 28 operatively connected to a piston 29, subjectv on one side to the pressure of a coil spring 30.

The reducing valves R1 and lf2 each comprise a casing 31 containing a. diaphragm 32, subject on one side to the pressure of an adjustable spring 33 and carrying a yoke 34 for operating a valve 35.

When the ap aratus is to operate automatically, a glo e valve 36, through which fuel oil may be supplied directly from the supply pipe 2 to the burners B, is closed at each boiler, While globe valves 37 and 38 are opened.

In operation, assuming the ypump 3 as supplying oil under a pressure of 225 pounds, for example, and that the reducing valve R1 is set for 175 pounds and the ureducing valve R2 for 200 pounds, if the steam pressure is low, the springs 9 of both master controller units M1 and M2 will hold the diaphragm 7 in its upper position against the low steam pressure so that the valve 10 in each unit will be held closed.

Fuel oil under pressure supplied from the pump 3 through pipe 13 to the piston head 12 will then equalize through restricted port 39 into the chamber above the piston head 11, so that the differential piston of each master controller unit will be held in its lower position as shown in Fig. 2.

The pipes 16 and 17 are thus connected to the return pipe 14 and consequently the opposite sides of the iston 19 of each damper regulator unit 1 and D2 is subject to the same pressure of the return pipe 14.. The shaft 25 and the stack damper 5 are provided with the respective Weighted arms 40 and 41, so arranged that they tend to move the dampers to` their full `open positions and also the sheave 22'with the connected pistons 19 to their upper positions,

v as shown in Fig". 3.

Pipe 42 leading from the chamber above iston 19 of the damper regulator unit D1 1s connected to the top of the pressure regulator valve V1 and pipe 43, leading from the chamber above piston 19 of the unit D2 is connected to the top of the regulator valve V2, so that the piston 29 of both valves is subject to the pressure of the return ipe 14. The pressure of fuel oil suppliedp to the pipe 2 therefore acts on the piston 29 of each re ilator valve to open each valve 28, and fue oil will then flow at the full pump pressure of 225 pounds, through the open valv V1 and pipes44 and 45 to the burners When the steam pressure in the boilers reaches a predetermined degree, the diaphragm 7 of the master controller unit M1 1s operated by the increase .in pressure to aesinet open valve 10 and thereby vent. fuel oil under `pressure from piston head 11 through passage 15 to the .return pipe 14.

The fuel oil pressure acting on the piston head 12 then shifts the differential piston, so that communication is opened from the pipe 13 to pipe 16, and consequently oil under pressure is admitted to iston 19 of the damper regulator unit D1. lhe piston 19 is then shifted downwardly, and thesheave is also pulled down by the chain 21, so that the rods 23 and 24 operate to partially close the stack damper 5 and the ash pit `doors 26. Fuel oil is also supplied from pipe 16 to pipe 42 and acts on the top of the piston 29 of the regulator unit V1 to close the valve 28 and thereby cut olf the direct flow of fuel oil at full pressure to the oil burners.

As the piston 19 moves downwardly, the piston valve 46 also moves and cuts oil1 communication between pipes 16 and 42, but at the same time, communication isV opened from supply pipe 2 through annular port 47 to pipe 42, so that the oil pressure on piston 29 of the regulator unit V1 is main tained, to hold the valve 28 closed.

tid

The valve 28 of the regulator unit V2 is i still open, since it is controlled by the damper regulator unit D2, so that this valve permits the flow of fuel oil under pressure froml ipei2 through pipe 48 to the reducing valve Il? and being set for 200 pounds, permits the flow of fuel oil to pipe 44 at a pressure of 200 pounds, so that the pressure of oil supplied to the burners B is now 20() pounds instead of 225 pounds and an intermediate fire is maintained.

Should the steam pressure increase to a still higher predetermined deglgree,the master controller unit M2 will operate, as described in connection with the unit M1, to effect the movement of the damper regulator unit D2, so as to further close the dampers and also admit fuel oil under pressure to pipe 43. vThe piston 29 then closes the valve 28 of the regulator unit V2, so that the supply of oil is cut off from the reducing valve R1 and this reducing valve ceases to supply fuel oil to the burners.

The reducin valve B2, which is set for 175 pounds Wi l now be effective to supply fuel oil to the burners at the reduced pres- .sure of 175 pounds to provide a minimum fire.

A drop in steam pressure causes thereverse action of the pressure regulating mechanism, so that the intermediate pressure is first cnt in and upon a further drop in steamA pressure, the high pressure ow is Having now described my invention, what I claim as new and desire to secure by Letters Patent, isz- 1. In a liquid fuel burning apparatus, the combination with a liquid fuel burner, of a ino .llU

,the burner at a plurality of different pressures, each less than the pressure of liquid fuel in the supply main.

2. In a liquid fuel burning apparatus, the

lcombination with a liquid fuel burner, of a liquid fuel supply main, a pump for supplying liquid fuel under pressure to saidm'ain,

a device operative to supply liquid fuel from saidfmain to the burner at a p-ressure less than the pressure inthe supply main, another device operative to supply liquid fuel fromtlie main to the burner at another pressure less than the pressure in the main, and means for selectively operating said devices.

3. The combination With a steam boiler and a liquid fuel burner vfor heating the boiler, aliquid fuel supply main, and a pump for supplying liquid fuel under pressure to said main, of a plurality of valve mechanisms for supplying liquid fuel from the supply main to the burner at different pressures less than the pressure of liquid fuel in the supply main and a master controller operated according to the pressure of steam in the boiler for controlling the operation "of said valve mechanisms.

4. In a liquid fuel burning apparatus, the' combination with a liquid fuel burner, of a source of liquid fuel under pressure, a regulating valve for controlling the supply of liquid fuel directly from said source to the burner, a reducing valve for limiting the pressure of liquid fuel', supplied to the burner, and a regulating valve for controlling the supply of liquid fuel to; said reducing valve.

5. ln a liquid fuel burning apparatus, the combination with a liquid fuel burner, of a source of liquid fuel under pressure, a regulating valve for controlling the supply of liquid fuel directly from said source to the burner, a reducing valve for limiting the pressure of liquid fuel supplied to the burner, a' regulatin valve for controlling the supply of liqui fuel to said reducingvalve, and a second reducing valve for supplying liquid fuel from said source to the burner at a different predetermined pressure.

6. In a liquid fuel burning apparatus, the combination with a liquid fuel bur-ner, of a source of liquid fuel under pressure, a regulating valve for controlling the supply of liquid fuel directly from said source to the burner, a reducing valve for limiting the pressure of liquid fuel supplied to the burner, a-regulating valve for controlling the supply'of liquid fuel to said reducing valve, a second reducing valve for supp-lying liquid fuel from said source to the burner at a different predetermined pressure, and amaster controller governed by steam pressure for controlling said regulating valves.

7. In a liquid fuel burning apparatus, the combination With a steam boiler and a liquid fuel burner for heating said boiler, of a reducing valve for supplying liquid fuel to said burner at a predetermined pressure, a regulating valve for controlling the supply of liquid fuelfrom said source to the reducing valve, a second reducing valve for supplying liquid fuel from s'aidsource to the burner at a different predetermined preslsure, a regulating valve for supplying liquid fuel to the burner direotlyvfrom said source, and a master controller governed by the steam boiler pressure for controlling said regulating valves.

8. In a liquid fuel burning apparatus, the combination with a steam boiler and a liquid fuel burner for heating the boiler, of a source of liquid fuel under pressure, a regulating valve for controllingthe supply of liquid fuel at one predetermined pressure froin said source to the burner, a reducing valve for supplying liquid fuel at a different pressure to the burner, a regulating valve for controlling the Supplyof liquid fuel to said reducing valve, a second reducing valve for supplying liquid fuel to said burner at still another predetermined pressure, and a master controller governed by the steam pressure in the boiler for controlling the operation of said regulating valves.

In testimony whereof I have hereunto set my hand.

SHIRLEY S. WEEKS.

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