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Dec. 17, 1946. w. JEFFoRDs FEED WATER APPARATUS FOR BOILERS 2,412,775 _ Dec. 17, 1946. Y - > l1_. w. JEFFoRDs 2,412,775 FEED WATER APPARÁTUS FOR BOILERS Filed Nov. 6, 1944 fîy-Z 3 Sheets-Sheet 2 /7 f5 45 v476 lîybílwßë‘wf Dec. 17, 1946. 1_. W. JEFFORDS 2,412,775 FEED WATER APPARATUS FOR BOILERS Filed Nov, 6, 1944 3 Sheets-Sheet 5 ' Il?. = MHH! Ih III lll /04 i I ffy /06 a@îw/u. Patented Dec. 17, `1946 UNITED 25,412,725 STATES . PATE ÜFFI'CE .2,412,775 FEED-WATER APPARATUS Fon Bomans Leuell W. Jeffords, Chicago, Ill., assigner to Roma JeHords, Chicago, Ill. Application November 6, 1944,.’Serial No. 562,211 ` s claims. (c1. 122-456) 1 This invention relates to feed water appara- l tus for boilers and is more particularly concerned with an apparatus which does notl require the use of a feed pump or injector for supplying feed water to a boiler. Another object of this invention is to provide . “ I 2 Referring now to the drawings for a better understanding of this invention and more par ticularly to Figs. 1 and 2 therein, the feed water apparatus is shown as comprising a tank II hav `ing a partition I2 provided therein to `define a primary chamber I3 and a transfer chamber' I4. The partition I2 is formed with a centrally dis posed port openingv I6, of relatively smaller area than the conduit employed to supply water to the a feed water apparatus of this type which may be employed to supply feed water from either a supply of water under` pressure, such as the city water main, or from a water storage supply tank 10 primary chamber I3, to permit feedwater to flow of the typev employed to receive condensate re from the primary chamber to the transfer cham turning through the steam lines. ber under control of a valve Il actuated by a It is a further object of this invention to pro vide . a feed water apparatusy which conserves steam in operation by utilizing same to preheat the feed water before it enters the boiler. Another object of this invention is to provide a feed water apparatus of a vacuum-gravity type embodying automatic control means for supply ing feed water to a boiler as required to main tain the water level in the boiler between prede termined levels. ` Another object of thisA invention is to provide an automatic control system in which means are solenoid I8. Water is drawn into the 4primary chamber I3 through a supply pipe I9 and past a check valve 2 I. y A pipe 22 leads from the bottom of the trans fer chamber to a steam boiler 23. A check valve 24 is interposed in the pipe 22 to prevent a re verse flow of water from the boiler to the trans fer chamber. A steam line 26 is connected be tween the boiler and the upper end of the trans fer chamber, and the flow of steam therethrough is controlled by a valve 2'! which is opened and closed by means of a solenoid 23. A by-pass steam line 29 leads from the Pipe 25, between the valve 2l and transfer chamber, to the upper end of provided for discontinuing the flow of fuel to a boiler in the event the Water therein drops be low a predetermined level. the primary chamber I3. A check valve 3I is Another object of this invention is to provide interposed in the by-pass steam line 23 to pre either a continuous or intermittent flow of feed water to a, boiler for maintaining the water with 30 vent a reverse flow of fluid from the primary chamber I3 to the transfer chamber I4 when in the boiler between predetermined levels. the valve 21 is closed. A further object `of this invention is to pro In the operation of the apparatus thus de vide a feed water apparatus which is. relatively scribed Vwater is drawn from the supply line I 9 inexpensive in construction, reliable in opera into the primary chamber I3 by a vacuum pro tion, and embodying a minimum number of mov ing parts to insure that the apparatus will not readily get out of order. ` > This invention embodies other novel features, details of construction, and arrangement of parts which are hereinafter set forth _in the specifica tion and claims, and illustrated in the accom panying drawings wherein: Fig. l is a side elevational view showing an im» proved feed water apparatus arranged for use in supplying feed water from a water supply line to a steam boiler. - Fig. 2 is a wiring diagram illustrating the means employed for automatically' controlling the flow of water through the feed water apparatus to a b_oiler. Fig. 3 is a side elevational View illustrating a modified form of this invention in which feed water is> drawn from a condensate tank upwardly through the feed water apparatus for delivery Into the boiler by gravity. duced within the transfer chamber I4 while the valve I'I is in open position, after which the valve I1 closes the port I6. In the event the water level in the boiler 23 is below a predetermined level as illustrated in Fig. 2, the solenoid I 8 is 40 energized to open the valve Il to permit the water within the primary chamber I3 to pass through the port I6 into the transfer chamber I4. When the water level within the transfer chamber rises to a predetermined level, the solenoid‘IS is de energized to permit movement of the valve Il to its closed position against the port I 6. The valve 27 in the steam line 26 is then opened by means of the solenoid 28 to permit steam to flow from the boiler 23 into theY primary chamber I3 and the transfer chamber I4. When the pres sure within the transfer chamber I4 is equal to the pressure within the boiler 23, the feed water will pass by gravity fron-_i` the transfer chamber I4 through the pipe 22 tothe boiler. The by-pass pipe 29 is provided `to >equalize the pressures on 2,412,775 3 opposite sides of the valve I1 ln order to main tain same against the port opening I6 when steam is introduced into the transfer chamber. After the water leaves the transfer chamber I4, the steam supp-ly valve 21 is automatically closed and the valve I1 is opened to permit water to flow from the primary chamber I3 through the , port opening 4 . and break the circuit to the solenoid 18 which, I6 into the transfer chamber. This in turn, acts to close the valve 19. ' The water control solenoid I8 is connected to a source of current through leads 8| and 82. A pair of switches 83 and 84 are interposed in the circuit and are adapted to be opened and closed responsive to energization and de-energization of their respective relays 56 and 48. A manually operable switch 86 may be >provided in the circuit new supply of water acts to condense the steam 82 if desired. and thereby createa vacuum within the transfer 10 , The solenoid 28 is connected to a suitable source water through the pipe I9 of current through leads 81 and 8‘8 having a chamber to draw feed switch 89 interposed therein for opening and into the primary chamber I3'.> The solenoids I8 and 28 are energized by means closing the circuit responsive to de-energization of an electrical circuit including suitable relays and energization of the relay 48. and electrodes of the type now commonly em 15 The apparatus thus described functions au ployed for automatically controlling the water tomatically to supply feed water to a boiler when level within boilers. The present circuit contem the water level within the boiler falls below the plates the use of three electrodes 36, 31 and 38 lower end of the electrode 31 and thus breaks ' mounted within a suitable housing 39 disposed the holding circuit 58 through the relay 56. When adjacent the normal water line of a boiler and 20 the relay 56 is thus de-energized, the switch 83 having inlet pipes 4I and 42 leading from thev in closes the circuit 82 tothe solenoid I8 which terior of the boiler to the interior of the housing acts to raise the valve I1 away from the port I6. >39. A pair of electrodes 43 and 44 are provided Water contained within the primary chamber within the transfer chamber I4, the electrode 43 I3 passes through the port opening I6 into the being disposed adjacent the bottom thereof and 25 transfer chamber I4 until the water level therein rises to complete a circuit through the upper elec the electrode 44 being disposed approximately 1/3 of the distance between the bottom and the top trode 44, lead 43, relay 48, and secondary wind ing 49. The relay 48 is thus energized and acts of the transfer chamber. One circuit is completed from the upper elecn to close the switches 52 and 89 and to open the f trode 44 through a lead 46 to a switch terminal switch 84. The opening of the switch 84 breaks 41 and thence through a relay 48 and a secondary the circuit to the solenoid I8 and causes the transformer winding 49 to the ground. A holding circuit is provided for the relay 4'8 by a lead 5i which extends from the lower electrode 43 to a valve I1 to move to its closed position in seated engagement against the port opening I8. The closing of the switch 52 completes a holding cir switch 52 thence through the relay 48 and trans 35 cuit to the relay 48 which will be energized until former winding 49 to the ground. the water level within the transfer chamber falls Another circuit is completed from the electrode below the lower electrode 43. The closing of the 38 through a lead 53 to a switch terminal 54 and switch 89 acts to complete the circuit 88 to the solenoid 28 to energize same and thereby open thence through a relay 56 and secondary trans former winding 51 to the ground. A holding cir 40 the valve 21 in the steam line 26 which leads from the boiler to the transfer chamber and also cuit is provided for the relay 56 by means of a to the primary chamber through the by-pass 29. lead 58 extending from the electrode 31 to a When the pressure within the transfer chamber switch 59 and thence through the relay 56 and >I4 is equal to the pressure within the boiler, the 4secondary transformer winding 31 to the ground. Vwater within the transfer chamber will flow by A third circuit is completed by means of a gravity through the pipe 22 and past the check lead 6I which extends from the electrode 36 to valve 24 into the boiler. When> the holding cir ya relay 62 and thence through a secondary trans cuit 5I between the electrode 43 and relay 48 is former winding63 to the ground. The windings 49, 51 and 63 form secondary y broken by movement of the water level below the electrode 43, the relay 418 is deenergized 'and per windings for transformers 64, 66, and 61, respec tively. 'I‘he transformers 64, 66 and .Glare pro vided -with primary windings 68, 69 and -1I,-=re_spectively, which are connected to-asource of cur rent by means of leads 12 and 13 having a suit' mits opening oftheswitches 52'and 89"an'd clos ing of the .switch 84;"'The de-energlzati'o'n ofthe - relay`> 48- -thus completes >the "cycle of operation'. The apparatus continues to operate automatically able operable switch 14 interposed therein. The transformers are carefully matched and second in the manner thus described until the water arily connected to their respective relays in a electrode 38. within the boiler rises into contactwith the upper ` ' manner well known in this art, and the electrodes When the water level within the'boiler is in predetermined rise and fall of the water level completed through the lead 53, relay 56 and sec ondary winding 41 to energize the relay 56 which then acts to open the switch 83 and close the switch 59. Opening ofthe switch 83 breaks the circuit 'tothe solenoid I8 to render ysame inoperaf tive until the water level in the boiler falls below the electrode 31 which forms part of the holding 36, 31 and 38 are suitably positioned so that a 60 contact with the upper electrode 38 a circuit is acts to make or break the electrical circuits con trolling- the relays. ' The electrode 36 is employed to control the sup ply of fuel oil or gas delivered through conduit 16 to the boiler. When the electrode 36 isin con tact with the water within the boiler the relay 62 is energized to close a switch 11 in a circuit 15 leading from a- source of current to a solenoid 18. When the solenoid 18 is thus energized, it acts to open a valve 19.to permit the-fuel to now through thev conduit 16 to the boiler.- -In theevent the water level within the boiler falls below the lower end of the electrode 36, the circuit to the relay 62 is broken and permits the switch 11 to open circuit 58 for the relay 56. v It will thus be seen that the water level within a boiler may be maintained between two p_rede termined-_levels a-s determined by the positionV oi the electrodes 31 and 38. If for any‘reasorr'th'e water level within the boiler fa‘ls below'the lower end vof thel electrode '36, the supply'pf fuel'tojrthe boiler will be cut off. " ' " " ‘ ‘ ' ‘ 5 Fig. 3il1ustrates a modified form of this inven in the operation of this apparatus wouldlbe dueto the radiation of heat from the tank II and the pipes 22, 26 and 29 and that this heat loss could be reduced to a negligible proportion by properly covering these parts with insulating material. While this invention has been shown in but two forms, itis obvious to those skilled in the art that tion in which the feed water for the boiler is stored within a condensate tank IOI . Feed water is supplied to the condensate tank throughv a con densate return line |02 and a, feed water line |03’. The water level within the condensate tank is regulated by mean-s' of a pair of electrodes |04 and |06, the electrode I04‘being connected in a circuit Iû'I leading to a switch terminal |08, thence through a relay |09 and secondary wind 10 from the spirit ing III of a, transformer IIZ‘ to the ground. The tion. electrode |06 is connected in a, holding circuit I'I 3 I claim as my invention: leading through a switch II4’, relay |09 and sec l. In aA liquid transfer device for a> boiler, a ondary winding III to the ground. The primary transfer chamber having an outlet leading to the winding I I6 of the transformer is connected to boiler, a primary chamber having a liquid inlet a suitable source of current. and disposed to supply liquid to said transfer The supply of feed water through the pipe |03 chamber, a power actuated normally closed valve is controlled by a valve II‘I which is operated by for controlling the passage of liquid from the means of a solenoid I|8 connected to a suitable primary chamber to the transfer chamber, elec source of current through a, circuit I I9. vA switch trical means having a connection to the ‘boiler I 2| is interposed in the circuit II9 to make or break the circuit leading to the solenoid I I8 when actuated by the relay |09. In the operation of this electric control means for regulating the water level within the con densate tank, a surface contact between the 25 means operable for supplying steam to the trans fer chamber to preheat the liquid therein and to water and the e’ectrode I04 acts to energize the relay |69 to complete the holding circuit through the switch I I4 and to open the switch I2I in the tion of said valves, said means including a pair icircuit leading to the solenoid I I8. De-energiza tion of the solenoid II8 acts to close the valve 30 of electrodes disposed within the transfer cham ber and electrically connected for alternately I I'l and to stop the flow of make-up water lead operating said valves. ' ing through the pipe |03 to the condensate tank. 2. In a boiler apparatus of the character de When the water level within the condensate scribed, a primary chamber having a liquid inlet, tank falls below the end of the electrode |06, the a transfer chamber having a liquid outlet leading to the boiler, said primary chamber having a passage leading therefrom to the transfer cham ber, a power actuated normally closed valve holding circuit II3 to the relay I 00 is broken, thereby opening the switch |I4 and closing the switch I2I. The closing of the switch I2I causes the solenoid I I8 to o-pen the valve II'I to permit the make-up water to flow through the pipe |03 into the condensate tank. , In the operation of this modiñed form of the invention, it has been found that the vacuum cre ated within the transfer chamber I4 by condens ing of the steam therein serves to draw water up wardly through the pipe I9 and into the primary chamber I3. The distance the feed water may be drawn upwardly through the pipe I9 depends upon the tightness of the system, as any leakage of air thereinto will serve to offset the vacuum created within the transfer chamber I4. The apparatus disclosed in Fig. 3 is otherwise similar in operation and construction to the form of the invention illustrated in Figs. 1 and 2. While the two forms of apparatus shown and described are designed to provide an intermittent ñow of feed water to a boiler, it is obvious to those 40 opening said power actuated normally closed valve when the water within the boiler falls be low a predetermined level, valve means operable -for supplying steam to the transfer chamber, and electrical means for automatically control ling the alternate operation of said valves re sponsive to variations’ of the liquid level within said transfer chamber. ' 3. In a feed water apparatus for a boiler, a transfer chamber having a steam inlet and a Water outlet leading to the boiler, power actuated valve means for controlling the ñow of steam to said transfer chamber, power actuated normally closed valve means for controlling the flow of water to said transfer chamber, electrical means having a connection to the boiler and responsive skilled in this art that a pair o-f tanks |I could to the water level within the boiler for automati readily be connected and controlled for alternate callyV opening said power actuated normally operation to provide a continuous flow of feed water through a common supply pipe 22 to the 60 closed valve when the water within the boiler boiler 23. falls below a predetermined level, and electrical means for controlling the alternate opening and As is also well known in this art, it is desirable closing of said valve means, said electrical means to provide relatively small quantities of make-up water to a boiler either in the form of a contin uous flow or an intermittent iiow in order to pre vent deterioration of parts of a boiler due to chill ing and consequent alternate contraction and ex pansion. It will be noted in the operation of this appa ratus that the steam employed for transferring feed water to a boiler is not wasted as it serves to preheat the feed water prior to its transfer into the boiler. It will further be noted that the only heat loss including circuits having electrodes disposed in spaced relation within said transfer chamber for controlling the operation of said valve means responsive to predetermined variations of the water level within the transfer chamlber. 4. In a feed water apparatus for a boiler, a transfer chamber having a steam inlet and a `water outlet leading to the boiler, power actuated -qvalve means for controlling the flow of steam to said transfer chamber, power actuated normally closed valve means for controlling the flow of water to said transfer chamber, electrical means 2,412,775 7 having a connection to the boiler and responsive to the water level within the boiler for .auto matically opening said> power actuated normally ’ closed valve when the water within the boiler falls below a predetermined level, electrical means for controlling the alternate opening and the liquid within the transfer chamber rises into contact with the 'upper electrode, and means associated with said lower‘electrode for closing said steam control valve and opening said liquid control valve when the liquid level within the transfer chamber falls below said lower electrode. 6. In a liquid feed device for a boiler, a primary chamber having a liquid inlet, a transfer chamber including circuits having electrodes disposed in having a liquid outlet and a steam inlet leading spaced relation within said transfer chamber for lí) to thev boiler, said primary chamber having a controlling the operation of said Valve means re# passage leading to the transfer chamber, a power . closing of said valve means, said electrical means sponsive to predetermined variations of the water level within the transfer chamber, and electrical means associated with the boiler and acting re sponsive to predetermined variations of the water level therein for controlling the operation of said ‘ other electrical means. 5. In a liquid feed device for a boiler, a primary chamber having a liquid inlet, a transfer cham ber having a liquid outlet and a steam inlet lead ing to the boiler, said primary chamber having a passage leading to the transfer chamber, a power actuated normally closed liquid control actuated normally closed liquid control »valve interposed in said passage, electrical means hav ing a connection to the boiler and responsive to the water level within the boiler for automati cally opeping said power actuated normally closed Valve when the water within the boiler falls below a predetermined level, a steam con trol valve'interposed in said steam inlet, an upper electrode disposed within said transfer chamber, electrical means associated with said upper elec-' trode for'closing said liquid control valve and opening said steam control valve when the liquid valve interposed in said passage, electrical -means within the transfer chamber rises into contact having a connection to the boiler and responsive with the upper electrode, means associated with to the water level within the boiler for auto 25 said lower electrode for closing said steam con matically opening said power actuated normally trol valve and opening said liquid control valve closed valve when the water within the boiler when the liquid level within the transfer cham falls below a predetermined level, a steam control ber falls below said lower electrode, said elec valve interposed in said steam inlet, an upper trical means associated with -said upper and electrode disposed within said transfer chamber, 30 lower electrodes within the transfer chamber a lowerl electrode disposed within said transfer being controlled by said first mentioned electri chamber, electrical means associated with said calmeans. l upper electrode for closing said liquid control valve and opening said steam control valve when l Y ~ LEUELL W. JEFFORDS.