Патент USA US2404853код для вставки
July 30, 1946; w. SQ-LANDON , 2,404,353 FLUID CONTROL 'FOR OIL BURNQRS Filed April 24, 1944 ' . ‘ 2 Sheets-Sheet 1 ' > ' , INVENTOR. wear,” ,J. M BY ~ Y ' J4‘, ’ AT'Toam-w July 30, 1946. w. s. LANDON ' 2,404,853 FLUID CONTROL‘ .FOR‘ 011. BURNERS ‘Filed April 24; 1944 g Sheets-Sheet 2 FIG.4, ' » l"F163 ‘ ~ "INVENTOR. BY ' M ATTORNEY ' Patented July30,l945 2,404,853 UNITED STATES PATENT OFFICE 2,404,853 FLUID CONTROL FOR BURNERS Walter S. Landon, Detroit, Mich, a'ssignor to Detroit Lubricator Company, Detroit, Mich, a corporation of Michigan Application April 24», 1944, Serial No. 532,428 '4 Claims. (Cl. 158—38») 1 2. The ‘invention relates to fuel burning appara tus, and it has particular relation to devices for controlling the ilow of oil in oil burning equip ment. present invention ‘the burner may be ignited re1~a atively late after ‘the oil is fully turned on, and the operator can leave at once without any rie-I quire'ment of further observation. The present invention further contemplates obtaining these advantages in a "single ‘pot or receptacle type of nection with different types of oil burning equip burner. Additionally, the invention leonter'ii ment, one form is particularly applicable in ‘a plates a safety control for completely cutting (iii pot type oil burner of the multiple level type. the supply of oil in the event the operatordoes In this design of burner using two levels, a larger pot is supplied with a larger supply of oil for high 10 not ignite the burner ‘within a reasonable time. One object of the present invention therefore ?re operation, while a smaller pot below the is to provide means for controlling the supply of larger one is supplied with ‘a smaller quantity of fuel oil to a burner so as to permit initial ignition oil for low ?re operation. In connection with this of the burner at any time during a reasonable type burner, the flow of fuel to the larger and smaller pots has been controlled by valve de 15 period after‘ the fuel oil is fully turned on. ‘with ‘ the assurance that proper ‘combustion will auto vices, which, during normal operation of the matically occur without further attention on the burner, permitted a larger quantity of oil to ?ow part ‘of the operator. to the larger pot and a smaller quantity to the Another object of the invention is to provide smaller pot during high ?re operation and only the smaller quantity of oil to continue ?owing 20 an arrangement and control ‘which will at ?rst to the smaller pot during low ?re operation. One reduce the ?ow of :fuel to the burner after it is objection to this manner of operation has been ignited so as to match the‘ combustion rate, which that the fuel did not burn satisfactorily in the will then increase the ?ow" after ignition until full smaller pot during the high ?re stage. Further and proper ‘combustion is occurring and ‘which more, considerable di?iculty was encountered in 25 willstop the flow altogether if ‘the burner is not ignited within a predetermined period of time. initially starting the burner in the event the op erator failed to ignite it rather promptly when Another object of the invention to provide oil appeared in the pot. If ignition dit not occur equipment of ‘character which includes means promptly the burner became undesirably ?ooded for completely cutting off the supply of oil. :in the with oil and the operator had to watch the burner event the burner becomes ?ooded for any reason and especially if the operator ‘does not ignite the and work with it for a substantial period of time before good and regular combustion occurred. It burner within the reasonable period mentioned was practically impossible to ignite the burner Another object of the invention is to provide after too much ?ooding occurred and then leave improved control means for allowing a small it immediately. quantity of oil to ‘flow to a smaller pot in a mul .In applicant’s copending application for patent, tiple level burner in the low ?re stage and for increasing the supply to the smaller pot during Serial No. 505,744, ?led October 11, 1943, fuel - the high ?re stage. burning equipment is provided which‘ eliminates the ?rst objection of unsatisfactory burning in Another object of the invention is to provide a the smaller pot during the high ?re stage, and 40 simple and compact arrangement for accomplish= this objection is overcome by supplying a smaller ing the aforementioned results. and proper quantity of oil to the smaller pot Other objects of the invention will become an‘ during low ?re and then automatically increase p-arent from the following speci?cation, from ‘the ing this supply to the smaller pot in the high drawings forming a part thereof, and ‘from the ?re stage. It was found that by increasing the claims hereinafter set forth. supply to the smaller pot in the high ?re stage, For a better understanding or the ‘invention a generally constant vaporization of the oil in the reference may be had to the accompanying While the invention is adapted for use in con lower pot and satisfactory combustion thereof in the upper pot would occur. The present invention obtains the advantages . drawings wherein: . Figure '1 is a vertical, sectional ‘View of a me! burning arrangement and control apparatus con‘ of the copending application and also avoids the structed according to one form of the ‘invention; other objection by increasing the supply to the Figure 2 is a crossesectional view ‘taken sub smaller pot during high ?re operation and allow stantially along the line of '1 with ing a longer period of time in which the operator certain parts broken away for the purpose-‘oi may ignite the burner. In other words, with the 55 clarity; ‘ i a > 2,404,853 _ 1" - __ , 3 4 Figure 3 is a detail view on a large scale show wardly into a pipe 42, and the end of this pipe ing the valve position when the burner is being supplied with fuel at a full ?ow rate; and Figure 4 is a view on the order of Figure 3, but showing the valve in a position where only a small quantity of fuel is supplied as in the event the burner is not ignited soon after full ?ow is initiated. ' I ' Referring to the Figures 1 to 4, the burner joins a four-way connectionv or valve casing 43 having intersecting openings or passageways 44 and 45 with the passageway 44 horizontal and the passageway 45 vertical. The passageway 44 » is connected to the pipe 42 at one side of the connection, while at the other side it is con nected to a pipe 46 in turn connected to the larger pot l0. comprises a larger pot I0 and a smaller pot ll below the larger pot and opening thereinto. The At its lower end the vertical passageway 45 is enlarged as indicated at 41 and then com bottom wall of the larger pot has an opening municates with a ?oat chamber 48 which is part of the connection 43. Substantially midway between the top and the bottom of the ?oat chamber, a, pipe 49 is connected thereto and [2 overlying the open upper end of the smaller pot, and such ‘bottom wall around the opening is ?ared upwardly, as indicated at I 3, so as to ‘permit proper combustion, guidance of vapor leads to the smaller pot II and the connection ized fuel, and also to provide a small dam for between the‘ pipe and the smaller pot is slightly holding a slight level of oil in the larger pot above the bottom of the latter. before it can over?ow into the smaller pot. For controlling the flow of ‘fuel oil through Openings I4 are provided in the side walls of 20 the connection 43, a valve stem 50 is vertically both pots to allow air to enter for combustion reciprocatory in 'the‘vertical passageway 45 and purposes.v The larger pot is open at its upper extends downwardly through the ?oat chamber end; as indicated at Hi, to .allow the burned gassesto escape to a flue or other connection. 48 where it has a smaller end portion 5| slid able in a vertical opening 52 forming part of a Air, will be supplied through the openings M by means ofsuitable draft equipment. . cover 53 on the lower side of the ?oat chamber. A screw 54 in the opening 52 serves as a means For‘supplying fuel oil to the burner, a ?oat valve casing 20 is provided having an inlet 2| which is adapted to be connected to afuel line so that fuel oil may flow into the casing. The casing above the connection 2| has a projection 22formed with'a valve seat 23 which is adapted to cooperate with a vertically movable valve of adjusting the vertical position of the stem‘ 50. Within the chamber 48, a hollow metal ?oat 55 is slidable on the smaller portion 5| of the I stem and when the ?oat rises suf?ciently it en-. stem 24. Flow of fuel oil into the casing is gages a shoulder 56 at the junction of the two stem portions so -as.to move the stem therewith. The stem 55 ?ts closely but slidably in that part of passageway 45 above the enlarged part or controlled'by ‘vertical movement of the stem 24, space 4? as best seen in Figures 3 and 4, and has andisuch'movement is in turn controlled by a an axial groove or slot 51 extending from its ?oat 12-5 connected to a lever 26 which in turn upper end to a point which allows the slot to be is connected to the valve stem. The lever 26 in communication with the space ‘41 when the ofithe?oat has an extension 29 disposed under . Theislower in itspart lowermost of the pipe position. 46 provides a dam a; trip v‘arm 30 forming‘ part of a tripping device 40: stem indicated generally at 3| and which includes or wall of slight height, as indicated at 59, in a "tripping lever 32 overlying the valve stem 24. the opening 44, so that oil ?owing through the If the ?oat rises'too high, the trip operates to passageway 44 cannot enter the pipe 48 until the strike-the valve stem 24 and forcefully close it. e oil level or rate of ?ow is high enough to ?ow' The detailed construction of the ?oat control and 45; over the pipe ‘end. Thi relationship is effected tripping .device shown need not be described by having the center of the pipe 45 above the here, .as it is substantially .the same as that center of the passageway 44. shown in Russel Patent No. 2,317,556. With the valve stem 31 in its lower position so .Forallowing oil to ?ow from the casing 20 that a small quantity of fuel such as 2 c. c. is to. the burner, the casing has a tubular projec 50 ?owing downwardly, the fuel will flow through tion 33 extending upwardly from its‘ bottom wall, the pipe 42 and passageway 44 until it- reaches and this projection substantially above the bot the vertical passageway 45, and then it will ?ow tom wall has a tubular valve seat 34 provided downwardly through the slot 51 as seen in Fig with a cylindrical valve opening 35. The cylin ure 3 and into the ?oat chamber 48. When the drical part of the valve opening cooperates with level in the ?oat chamber 48 is high enough the the lower, generally cylindrical end 36 of a valve fuel will then ?ow into the lower pot II, and if stem 31 which isadapted to be moved vertically, the latter is ignited, the stated amount of- fuel and for metering the ?ow of oil through the will be constantly suppliedso as to maintain low opening, such cylindrical part 36 has a slot 38 ?re. Under these- conditions, no oil will ?owv tapering to a V form at its upper end. When 60 through the pipe 46 primarily because the oil will the stem 31 is in the position shown, a metered ?ow downwardly through the slot 51 before itv and small quantity of fuel oil is allowed to ?ow can flow into thepipe ‘46, and furthermore, be; ' downwardly through the valve opening, and as cause the oil would have to be high enough inv an example, the quantity allowed to flow may be the passageway 44 to ?ow over the lower pipe‘v 2 c. 0. per minute. When the valve stem 31 is 65 raised tov expose the straight part of the slot, the amount ‘of oil‘allowed to flow may, as an ex- , ample, be 40 c. 0. per minute. No means is ,Sh-OWHL‘fOI' raising and lowering the valve stem 31,,but as is well understood in'the art, a cam arrangement may be used, including a handle 39 on the upper end of the stem 31 for raising and lowering the stem upon turning of the handle ‘between two _ limiting positions. Oil ?ows through the valve opening and down. edge~59. ‘ V e I Now, if the operator wants the burner‘to 0p erate at high ?re,-the valve stem 31 will be raised to allow, for instance, 40 c. c. to ?ow downwardly through the pipe 42. With this set of conditions,‘ the oil will ?ow on through the passageway 44 and into the pipe 46 and then into the larger pot where it will ignite due to the ?ame in the lower pot. Some additional-oil will flow downwardly ] through the slot 51 due to the'greater flow and height'of fuel in pipe 42. It "may. be desirable =' 2,404,853‘ S to so arrange these conditions that twice as much fuel voil, that is 4 c. -c., will ?ow downwardly through ‘the slot 51!, While the remainder, or 36 c. 0., will flow into the larger pot. As stated earlier, this additional quantity of fuel oil in the The existing'condition now is that the lower pot H has 011 up to ‘the line F2, but this level is still noti-so high as to prevent ignition and proper combustion. It should ‘be understood ‘that the levels ti and ‘62 may be varied and that the valve is de?nitely desirable to provide for even com and float 1 movements may be so arranged and related as to obtain a desired level v6Q with-the bustion. valve in the position as seen in ‘Figure ‘4. lower pot during combustion in the upper pot ' i - Up to the vtime that the valve reaches ‘the posi and he raises ‘the valve stem 3? fully so as to 10 tion shown by Figure 4, and eventhereaf‘ter, the burner is not so flooded as to prevent properigni allow full ‘?ow of ‘oil into the burner and fails to tion and combustion.‘ Hence, at any time during ignite the burner promptly when oil ?ows ‘into this period, the operator may throw in a lighted the pots, the level of the ‘fuel will rise in the the event the operator ‘is starting the ?re piece of paper, or the like, and then leave the lower pot 1! l and the float chamber ‘Ii-3. When the level of the fuel oil in the pot l-l rises a 15 burner alone with the assurance that combustion will occur and continue in‘ the proper manner. small amount, the ?oat 5'5 will pick up the valve After burning begins, the temperature will in stem 51? and raise it, and upon sufficient move crease thereby resulting in better vaporization ‘of men-t of the float the stem will move entirely across the passageway 1.14 and ‘close ‘it. During fuel and as more and more oil is consumed, the this movement, the upper end of the stem grad 20 ?oat ‘55 will gradually drop and ?nally 'a full ?ow will occur with a part, as mentioned previously, ually closes off the oil ?ow to the pipe at leading going to the lower pot and a larger portion going to the upper pot Ii). to theupper‘pot. . i i The general operation of the burner may best If the operator should not ignite the burner be approached by considering two different con within a reasonable period of time, a ?ooded con ditions, In the first place, if the burner is op dition might eventually occur in the event of erating normally it will be governed by the con leakage past the ‘valve stem and in order to pre trol 33. If the control 39 is in a position for low ?re operation, oil will be ?owing ‘downwardly vent this ?ooded condition, the upper end of the valve stem 50 is in engagement ‘with astems65 ex through pipe 152 at a low rate of about 2 c. 0. per tending on upwardly through a tubular projection minute, through the slot 51 in the valve stem 5%, 66 in the casing l2 where it is engageable with into the ?oat chamber 4-8, through pipe t9 and a projection 6'! on the trip element 30. This trip into the smaller pot ii I. Oil will not ?ow through element when pushed upwardly, will completely the pipe d6 into the larger pot it and hence after the oil in the larger pot has burned following the out off the supply of oil entering the casing 2-0 previous high ?re operation the burning "will be 35 and is of such character that it must be reset‘ manually ‘before the supply of fuel again ‘is turned con?ned to the smaller pot ‘I l and a low ?re will be obtained. Now, if the operator moves the control 39 so as on. i In general, it will be apparent that if the burner is not ignited after the fuel is ‘turned on or if to allow full flow of oil through pipe 42, the oil will ?ow on through the passageway 4% into the 40 combustion is poor or improper for any reason, larger pot and will be ignited from the smaller the ?oat valve will gradually cut off or decrease the supply of oil and ?nally cut it ‘off altogether pot. At the same time, a slightly greater quan tity of oil will flow‘ through the slot 51 due to the if the concentration of unconsumed oil reaches greater supply in pipe 42 and greater head of oil. a certain amount or level. If consumption and This increased quantity of oil ?owing through 45 vaporization should be poor, as it might be for a ~ the slot 5?‘ will supply a larger quantity, for in; period of time after initial ignition, the supply stance 4 c. c., as indicated previously, to the would be gradually reduced until the oil supplied smaller pot ll. Good combustion will be ob approximated that consumed and then as vaporization and consumption increased, the sup tained under these circumstances. The foregoing concerns normal operation. If 50 ply would increase and keep pace with the con sumption until a predetermined rate of ?ow the operator, however, should turn the control 39 to high ?re or full flow and then not ignite existed along with uniform and good vaporiza the burner promptly, the present invention would tion and consumption. In the event the burner become operative to prevent an undesirable or were not ignited, the oil would be ?nally shut off ?ooded condition for a substantial period of time 55 but after that if it were ignited, the rate of ?ow and allow the operator more time in which to would gradually increase in accordance with ignite the burner without incurring any undesir vaporization and consumption until the predeter able results. Assume then, that the operator mined rate of ?ow would occur. does not ignite the burner promptly after turning Although the invention has been illustrated the control for full ?ow. The oil would ?ow into and described in detail, it will be apparent to the large pot I0 and soon over?ow therein into those skilled in the art that various modifications the smaller pot H and raise the level of the oil may be made without departing from the scope in the smaller pot and in the chamber 48. As of the appended claims. soon as the level in the ?oat chamber 48 rises What is claimed is: to the line 6|, for instance, as seen in Figure 1, 65 1. In a liquid fuel burning'apparatus having a the ?oat 55 will begin to move the valve stem 50 constant level device for supplying fuel to a main upwardly thereby gradually cutting off the supply burner pot and to a low ?re burner pot opening of oil through the passage M. The level of the upwardly through the bottom wall of said main oil in chamber 48 will continue to rise but pro , pot so that liquid fuel can over?ow from said gressively slower as the oil is gradually cut off by 70 main pot into said 10w ?re pot, safety means the moving valve stem and upon the level of the controlling the ?ow of liquid fuel from the con oil reaching the line 62, for instance, the valve stant level device to both of said pots and com stem 50 will have moved into the position shown prising a ?oat chamber, a conduit connecting said by Figure 4. With the valve stem in this position, ?oat chamber to the low ?re pot for ?ow from the supply of oil is cut off. 75 said ?oat chamber to the low ?re pot and for 2,404,853, 7 ?owv from the low ?re pot‘to said ?oat chamber 7 so that the liquid level in said ?oat chamber will correspond to the level in the low ?re pot, a valve casing mounted on said ?oat chamber and having an inlet and a plurality of outlets, a con duit connecting said inlet to the outlet of the constant level device, one of said valve casing outlets discharging into said ?oat chamber,‘ a conduit connecting another of said valve casing outlets to said main pot, a valve controlling said one outlet, a’ valve controlling said other outlet, and a ?oat in said ?oat chamber and connected 8 such that increase of liquid level in the low ?re pot above a predetermined level will correspond ingly increase the level in said ?oat chamber, a valve casing mounted on said ?oat chamber and having intersecting passageways, a valve rod re ciprocally ?tting one of said passageways and operable on movement to interrupt ?ow through i the other passageway, said other passageway hav ing one end connected to the outlet of the con- , stant level device and having its other end con nected to the main pot, said rod having 'a slot for ?ow to said ?oat chamber, said slot having to said valves and operable at a. predetermined an end wall movable into said one passageway liquid level in the low ?re pot to close said ?rst to close on’ flow to said ?oat chamber, and a ?oat named valve and at a higher liquid level in said 15 in said ?oat chamber operable to move said valve low ?re pot to close said second-named valve. rod to close ?rst said slot and then said other 2. In a liquid fuel burning apparatus having a passageway. constant level device for supplying fuel to a main 4. In a liquid fuel burning apparatus having a ‘burner pot and to a low ?re burner pot opening constant level device for supplying fuel to a main upwardly through the bottom wall of said main 20 burner pot and to a 10W ?re pot opening upwardly pot so that liquid fuel can over?ow from said through the bottom of said main pot so that fuel mainpot into said low ?re pot, safety means con can over?ow from said main pot into said low trolling the ?ow of liquid fuel from the constant ?re pot, safety means for controlling fuel ?ow level device to both of said pots and comprising from said constant level device to said pots and a ?oat chamber, a conduit connecting saidi?oat 25 comprising a ?oat chamber, a conduit connecting chamber to the low ?re pot for ?ow from said said ?oat chamber to said low ?re pot, a valve ?oat chamber to the low ?re pot and for flow casing mounted on top of said ?oat chamber and from the low ?re pot to said ?oat chamber so having a horizontal passageway and an intersect that theliquid level in said ?oat chamber will ing vertical passageway discharging downwardly ‘correspond to the level in the low ?re pot, a valve 30 into said ?oat chamber, a valve rod reciprocally , casing mounted on said ?oat chamber and having ?tting said vertical passageway and extending an inlet and a laterally directed outlet and a downward into said ?oat chamber, a ?oat in said ' downwardly directed outlet discharging into said ?oat chamber and engageable with said rod to ?oat chamber, a conduit connecting said inlet to move it upwardly, said rod having a longitudinal the outlet of the constant level device, a conduit connecting said lateral outlet to the main pot, a valve controlling said downwardly directed outlet, slot for ?ow through said vertical passageway into said ?oat chamber, said slot having an end wall movable into said vertical passageway to a valve controlling said lateral outlet, and a ?oat close said slot, said rod having its upper end in said ?oat chamber and connected to said valves terminating adjacent the lower wall of said hori~ and operable .at a predetermined liquid level in 40 zontal passageway and movable upwardly by said the low ?re pot to close said ?rst-named valve ?oat to close said horizontal passageway, a con and at a higher liquid level in said 10w ?re pot to duit connecting one end of said horizontal pas close said second-named valve. ‘ sageway to the outlet of said constant level de 3. In a liquid fuel burning apparatus having a vice, a conduit connecting the other end of said constant level device operable to supply liquid . horizontal passageway to said main pot, said ?oat fuel to a main burner pot and to a low ?re burner - pot opening upwardly through the bottom of the main pot so that liquid fuel can over?ow from the main pot into the low ?re pot, safety means receiving liquid fuel from the constant level de c. vice and controlling ?ow of the liquid fuel to both of the burner pots and comprising a ?oat chamber communicating with the low ?re pot chamber being positioned, laterally of said low> ?re pot such that upon a predetermined level in said 10W ?re pot said ?oat will lift said rod to close said slot and at ahigher level in said low ?re pot will lift said rod to close said horizontal passageway. ‘ V WALTER S. LANDON.