US1455337A - Regulating device - Google Patents

Description

May 15, 1923.

1,455,337 D. s. JAcoBus l v REGULATI NG DEVI CE omglnal Filed Dec. v14, 191ev 2 Sheets-Sheet l JNVENTOR.

,BY 2W fw ATTORNEYS.

D. s. JACOBUS REGULATING EVICE Original Filed Dec. 14, 1916 2 Sheets-Sheet 2 I' f2, T l-E-Z-- IN V EN TOR.

n A BY 4%Mvw ATTnRArn/c Patented May i5, i923.

TA LES DAVID sJACoBUs, or JERSEY CITY, NEW JERSEY,- iisfsief'iioieTol irnniiiioooirjaf WILooX COMPANY, oFvBaYoNNE, NEW annsnv, A CORPORATION QENEW REGULATINGnnvIcEg.

oiiginai appiicatiqii mea December i4, 191e, serial No. i3e,a32.-niviiied anims appiiclation niet sep'- L temberfi, 191e. f serial No, 252,551.`

To all whom tmag/ concern l Beit known that I, DAVID S. JAcoBUs, a

citizen of the United States, residing in kler-` i sey City, in the county of Hudson and Statev of New Jersey, have vinvented certain new and usefullmprovementsin Regulating- De-l vices, disclosed in the following specification.'

My invention is disclosed in my prior Patent No.`1,328,997 granted January 27, 1920,v

' and of which the division, y

My invention relates to a regulating de- `present application is a vice in which an actuating member, which 4is preferably operated by fluid pressure', is

controlled by va iiuid pressure operated controlling device. lvhave illustrated my invenfv 'tion in connection `with a system that regulates the temperature of sup'erheated steam, `the regulator mechanism being responsive to the temperature l'of the steam. `It is to be understood, however, that my invention is equally applicable to any system iii-which therev is a variable pressure,and in which it is desired to actuate a regulating `device in response to such pressure variations. One application of'my present invention isillustrated in my prior Patent No. 1,328,997

where the power-actuated member is shown connected to doors in a supeiheater setting, by which the amount of superheat is controlled or regulated.

` ln'the drawings which illustrate one embodiment of my invention, Fig. lis a1 diagrammatic view illustrating` the principle of operationof myinvention, and Fig. 2`is a side view, mainlyy in section, showing details otedy to a leverv 9 'having its -fulcrum at .10.

The lever is normally depressed `by aspring y of the valve and parts associated therewith ffor controlling the admission of fluid to a power-operated cylinder.

'vapor pressure generatedy in the container isl utilizedto set in operation certain mechal,nisms to,l limit the vtemperature within the super-heater setting and thus limit' the degree'. of superheatj For the purpose of ex` In thepadaptation, hereinafter described,

plainingthe .principle of operationof my v ention, l have shownl avdiagrammaticary 155 rangementv in Fig. l inwhich thenumeral 1 designates a portion ofthe".superheated`v steam main. Within this main `is afeontainer" in the form of acoiled pipe 2 closedk tothe steam and containing a volatileliquidsuch. `as water,v alcoholl or 'mercury having `a Vfixed boiling point for a givenl pressure;- T he con-:1,` ,A f

tainer may have any appropriate form `which l f will insure an' effective impingement. ofthe superheated steam andra` relatively.. large heating surface with the proper rinter'nal. volume. The upper end of the` coil 2 islfs'e-.i

-cured in an opening inthe` cap 3 v ;losing'f"ithe end of the steam main, said cap'f'h'a'ving a chamber 41 from which'ja pipe leads to a regulator. The coil2 is only partially filled with liquid,jthe"spa`ce above thi-illiolu'idbe-l 'j ing filled with vapor, the pressure `of :which .corresponds to thetemperature to which the liquid is` heated by the superheated steam.

The controlling mechanismv comprises s a chamber 6 having a flexible diaphragmgk7 upon whichdiaphragmv rests a idisc8'." When lwater is used asl the liquid infthe coiledspipe p 2 the chamber 6 is filled with water upon the surface of which oil is placed to prevent cor rosion of the diaphragmL 7, which is preferi ably of hardened steel.4 For a give'niste'am temperature passing over the coil 2 there will l' g be 'a 'given vapor pressure transmitted4 to the chamber 6. `This pressure acting supon" the under side ofthe diaphragm 7"is" trans' mitted' through the followingm'echanisineff The post'wliichfbears on the1disc-8` ispiv-y" 905- '11 connecting the same to the frame.v The .i

j Listing 'the controlling mechanism to operate*` at anyV desired pressure. The upward move.- g

ment of the lever 9 is preferably limited by means of avstop' 12.V The free end of theleve'r 9 is connectedbya stem 13 .togava'l've l'whi'ch i valve controls the admission offfluidfrom air, y inlet pipe 1`5"to a 'passagefland a chamberl7 within the valVe'CaSing', whichfchainvbei". communicates with the motorcylinder 18. The motor piston 19 is connected b`y a 'piston' y ioo g `rod 2O `to a actuated member or lever i 21 vfor' operating. aregulator, the same ybeing f fulcrumed at 22V on a link 23. They lever l21 is vpreferably counterweighted at 24 and is "connected to a rodV 25 the fmover'nents vof which are utilized tocontrol the temperature of the superheated steam, as more yiully y.disclosed yin myv prior application, which control VImay Abe effected by y admitting air i' .10

around the superheater. The power actuated member or lever 21, which is actuated by the piston 19, is thus kgoverned vbyfa controlling mechanism actuated. by fluid pressure.

g VThe action of the controlling n iechanisml above vdescribed is to cause the vapor pres sure" generated in coil 2 to actthrouglr the i vmechanism 'in sucha manner that when ;for whichy the apparatus. isset, thek lever [by admit .water under pressure to the working side of the pistony 19. y`When the piston.

-1'9f-is movedthe power lever21 will be. cor

1`respondi-ngly mov'edand thereby the rod 25, lthe.niovernent of which effects a reduction in the ytemperature oi`V .the superheated steam,

i' f asfully' disclosed in my priorY application.

l".'Inithe arrangement shown in my prior application, whenthe temperature of the f steam is vkreduced below that at which the apparatus is set, the/valve corresponding :to-y. the valve 14' was moved to its seat by the spring 11.. In the practical application ofthe apparatus shown in Figures 1 to 8` of the device shown vin that application,

. however, it'. was found that-the doorsfor `admitting vair into the setting kwould not at.

alltimes closeuntil after the temperature .of the superheated steam hadlfallen aconsiderable amount below that at which the .doors were opened. This was due to the use of an unbalanced valve and `friction losses,

For example, if thedoors' openedwhen thev `effi-5000711". they would sometimes fail to superheated steam reached' a temperature close before the temperature had fallen to 475 F.. Under most conditions of operarltion as an emergency device this falling of the temperature of the superheated steam `belowthat at which they doors are opened is not objectionable, as 'the ,fireman or attendant ,can readily press down the leverl `,9 afterthe superheated steam .hasybeen re-. duced to the desired degreeand thus bring the apparatus toits initial condition in i y.which it will remain untilr the temperature (of the steam flowing over the coil 2 again :reaches the temperature tofwhich the apkparatus 1s set. Y y. y In accordance with my presentinvention 'provision is made for rinsing the doors which 'adm-it air to the setting immediately Aafter the. temper-attirent thevsteram flowingv over the coil 2 falls below that at which the apparatus the lever 9, the valve le normally closing the 'rend oi the water inlet 15. Vhen the valve is opened waterl flows throughpas sage 16 raising ball-valve 26,- th'ence into. j the, chamber 17, from which the water is admitted into the power'cylinder 18. During the time that the valve 1li is open and [the vpiston 19 is descending, a poi-tion of the water from chamber 17 flows through the voutlet 27 into waste pipe 28Min a manner similar. toU that .disclosed in, my priorv ap,- plication, the duct opening. being controlled by valve 27. Thefvalve. casingis formed is sa. nl this construction the valve Ispindle 13 is connected to the end. ofl

with a verticalchannel 29 which commun nicates with thed chamber 30 in which the valve moves, through a duct 31 leading from the lower part of the chambery andwc'on trolled` by a valve 32. That portion of channel 29 which isbelow duct 31 iscon-l nected by a pipev33 with a power cylinder 18, said. pipe entering the cylinderfat a point which causes it .to besclofsed ,by the piston on its downward .move-ment. Thel lower end of' the cylinder is closedby a vhead 3d, and a drainpipe 35 connects the cylinder with the waste-pipe 28. The upper end ofv channel` 29 .above duct 31 is l.connected by a duct 36 with .thegchamber v,3Tin the which is secured to valve-stem .13.

`When the temperature of the .superheated steam flowingV over coil 2 reaches'thatfat which the apparatus isset to-v operate, lever 9 will be` raised, thereby opening Valve 1liA to admit water'underpressure'to the power ,95 y valve casing. aboveV an auxiliary. piston v'385,

piston, as before described. yWhen wateris admitted to chamber 30 a portion of it flows through duct 31 to the two branches of Vchannel 29'. That portion fio-wing through' the..

lower branch is conducted by pipe 33 tothe lower part of cylinder 18 so thatduring theA I c. descent of the cylinder,l so long asftheoutlet of pipe 33 remains open, the water solfadmit.- ted will escape through the drain connection 3,5. to waste-pipe 28. The` water which flows through the upper part offchannel 29is conducted through duct36l to the chamber 37 i' above piston 3S. There is, however,y acomparatively low pressure in the'l upper parteiy channel29during the time that water flows :freely through pipe When pliston'19 reaches thev end of its 'downward stroke it covers. the opening from f pipe 33, thereby f stopping the flow of vwater through saic'llpiper` and causingthe'water to flow Ithrough'nthe' upper part of channel 29 to .chamber`37,ithe v upward movement of piston 38not having been suliicient v to vcloserv completely yduct f3.6.. VVhenthe pressure infchamben3,7becomes great enough to overcomethefre'sistancefof valve 11i and the parts vassociatedtherewith, I

and provided the temperature` .of the superhcated steam flowing over coil 42 is such that 1,455,337 i y i y3 there is not too greatian unbalanced force v tending to maintain the lever 9 in its upper i parts that effect the opening of the valve 14 will be restored to normal position, that is, the valve 14 will be automatically closed as soon as the piston 19 reaches the limit of lits downward stroke and the piston will return to its original position at the top of the power cylinder if the temperature of ythe superheated steam. flowing over the coil 2 does not exceed the limit for which the apparatus is set, thus closing the doors in the setting through the system of levers connected to piston 19', as more fully disclosed in my prior application. Valve 14 will then remain closed until the temperature of the superheated steam flowing over 'coil 2 eX- ceeds the limit for which the apparatus is set. If, therefore, the opening of doors for admitting air into the setting, or the manipulation of dampers, as more fully described in my prior application, causes the temperature of the steam flowing over coil 2 to be reduced to the required degree, valve 14- will r'emain closed and the power piston will return to its normal position, thus closing the air admission doors.

If the temperature .of the superheated steam fiowingover the coil 2 still exceeds the limit for which the apparatus is set when the piston 19 reaches the limit of its downward stroke, the piston 19 will start to return to its original position, but immediately the opening into the cylinder at the discharge end of the pipe 83 is opened and the pressure is suiiiciently'lowered in the pipe 33, the valve 14 will be opened by the lever 9 and the power piston 19 will be forced downward. Forcing the power piston downward will again close` the opening into the cylinder at the discharge end of vpipe 33, which will again cause the piston toy rise. As long, therefore, as the temperature of the superheated steam flowing over the coil 2 is in excess of the limit for which the apparatus is set, the power piston 19 will remain near the limit of its downward stroke, moving slightly up and down in the way described, thereby setting and resetting the apparatus by bringing the valve 14 to its initial position. As long as the temperature of the superheated steam iowing o-ver the co-il 2 remains above the limit for which the apparatus is set, the power piston 19 will remain near the limit of its downward stroke, and by remaining near thelimit of its downward stroke it will serve to keep the doors which admit air to the setting open for the purpose of reducing the temperature of the superheated steam to the desired point. i As 'soon as the temperature of the superheated steam is reduced to below the limit `for which the apparatus is set, the

valve 14 will remain closed, andthe power piston will then travel upward to itsfinitial position.

The arrangement described regulatesthe temperature very 4closelyb-y overcoming the friction losses referred to above.' It will be obvious that when the temperature rises to the predetermined point, the pressure in the chamber 6 will be obligedto overcome not only the resistance of the spring 11 but also the resistance due to the friction of the various parts between the diaphragm and the valve 14. Or, to express 'it somewhat` differently, the spring 11 is adjusted so as to produce a pressure which .when added' to such frictional resistances will permit the valve 14 to open when the predeterniined mined pressure in S5 l temperature, and therefore thev predeteri" When the temperature drops below `they predeterminedy point, however, the tendency of the spring 11 toclosevalve'14 will be ref sistedto some extent bythe friction of the parts, so that the pressure in the chamber 6 must fall considerably below that required to open valve 14 before valve 14 can close. The friction of theparts, beingva constant resistance to themotion of the lever. 9 in both directions, is added to the pressure yof f f the spring 11 to resist opening, and is subtracted from they pressure of thespring 11 to resist closing. y

By providing'the additional counterpres sure derived from the piston 38,1 `am enabled to neutralize thel frictional resistance so that the pressure tending toclosey the valve will be the same as the resistance against its opening, since lthis counterpressure is applied only afterI the `controlling mechanism operated by the pressure in chamber 6 has operated. r 4' v F or example, if it should be` assumed that the total pressure in chamber 6 must be live hundred pounds in order toopen valve 14 and that the resistance to this pressure is made up of ten pounds due to the friction of the parts, and four hundred and ninety pounds due tothe spring 11, then when thel v valve 14 would close, unless my novel mechanisin is used. By arranging the'press'ure on piston-38 so that it will be equivalent `,to

twenth'vgpounds on the chamber 6, orto more than twentypounds. then the effect of the frictional losses will be nullified, or more than nullified, because the pressure tending to close the valve will be the total -of the spring 11, of e four hundred and eighty motor cylinder to escape when saidv valve is closed, to permit the member to return: toward normal position.`

5. In a device of the class described, a member, means to move the member towards normal position, a fluid-actuated motor comprising a motor cylinder and a motor piston therein, connected to the member and arranged to move the member out of normal position when fluid pressure is applied to the motor piston, a valve to control the application of fluid pressure to the motor piston, a fluid-pressure-actuated device connected to the valve to open the valve when the pressure on said device reaches a predetermined amount, an auxiliary piston connected to said valve, means, independent of the fluidpressure-actuated device, to apply pressure to said auxiliary piston to close said valve when the motor piston has been moved, and means to permit the fluid in the motor cylinder to escape when said valve is closed, to permit the member to return toward normal position.

6. In a device of the class described, a member, means to move the member towards normal position, a fluid-actuatedv motor comprising a motor cylinder and a motor piston therein, connected to the member and arranged to move the member out of normall position when fluid pressure is applied to the motor piston, a valve to control the application of fluid pressure to the motor piston, a fluidpressure-actuated device connected to the valve to open the valve when the pressure on said device reaches a predetermined amount, an auxiliary piston connected to said valve, means, operated by the motor piston, to apply pressure to said auxiliary piston to close said valve when the motor piston has been moved by the opening of said valve, and means to permit the fluid in the motor cylinder to escape when said valve is closed, to permit the member to return toward normal position. 1

7. In a device of the class described, a member, means to move the member towards normal position, a fluid actuated motor, comprising a motor cylinder and a motor piston therein, connected to the member and arranged to move the member out of normal position when fluid pressure is applied to the motor piston, a valve to control the application of Huid pressure to the motor piston, a Huid-pressure-actuated device connected to the valve to open the valve when the pressure on said device reaches apredetermined amount, means, independent of the liuid-pressure-actuated device, to close said valve, and a permanently-open outlet in said motor cylinder to permit the fluid therein to esca-pe, to permit the member to return toward normal position.

8. In a device of the class described, a valve, a pressure-actuated device, connections 'betweenthe lvalve and said devicear- 4 ranged to open the valvewhen'the pressure on said device has-reached a predetermined ;4

amount, means to hold the valve onitsseat, and valve closingmeans independentof the means to liold the valve on its seat and op-y erativeonly when thevalve lis, open, to` exert a closing pressure on said valve substar'i-4 tially equal to the frictional resistance of the y l and the presthe lcla-ss described,- a`

pressure against the lever to move it away.

from normal position, andl a supplemental power device to move the lever toward normal position and operative lonly-after the lever has been moved away from normal position by the Huid-pressure device against the pressure of the constantly acting means. 10. In a device ofthe class described, a motor and means to control the application of power to the motor, including a temperature-controlled fluid-pressure actuated device, a lever connected to said device to be moved by the expansion of the fluid in said device, constantly acting means to hold the` lever in normal position and a supplemental power device arranged to exert pressure on said lever to return it to normal position only after the lever has been moved outS of normal position by the fluid-pressure device against the pressure of the constantlyy acting means.

ll. In a device of 'the class described, aV fluid operated motor and a valve to control the application ofpower to the motor, a

lever connected to the valve, a spring to hold the lever innormal position` wit-h'the valve closed, a fluid-pressure device subjected to varying temperatures, a plunger arranged to be moved by the fluid'in said device when the temperature rises, said plung.-

close the valve, and means to cause said supplemental power means'to` be thrown into operation only after the lever has been moved out of normal posit-ion to open the valve to actuate the motor, p i l 12. In a device of the class described, 4a member,'means to move the` member toward normal position, a motor connectedto the member to move it out of normal position,

and means tocontrol the application of power tothe motor, including a lever, a fluida pressure actuated device to move the lever out' of normal position, means to move the lever Vtoward normal position and supple vInenjal power means to move the lever toward i normal position lWith a force lsubstantially equal tothe rictional resistance of the parts,

y and? means to render said supplemental power lmeans operative only after the motor has *moved the member out of normal position,

said motor' being arranged to permit the member to moveback to normal position When the power is shut olf by the lever,

whereby the member lmay be moved out of normal position and returnedthereto m-k signed my name in the, .pres en`ce; of 'tivo supb-` f scribing Witnesses.

"Witnesses F. A. CONKLING. EDITH, CAMP.

DAVID e. JAooBUe,

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