US1714519A - Feed-water regulator - Google Patents

Description

y ,1929. H. A. w. PETERSEN 1, ,5 9

' FEED WATER REGULATOR Filed March 12, 1923 Patented May 28,1929. I I

umrsn STATE 5,

HEINRICH, A. w. PETERSEN, or GARY, INDIAN FEED-WATER REGULATOR.

- 1 Application filed March 12, 1923. Serial No. 624,457.

My invention relates to regulators for boiler feeds andhas for its primary object the provision of a regulator which :is efiicient,

economically manufactured, easily installed,

and certain in operation.

Another object of the invention is to provide a regulator having pressure equalizing valves controlled by a balanced arm-on which is mounted a hollow member in communication with the boiler, whereby the weight of the hollow member maybe varied by automatically changing the contentsthereof by the 1 height of the water in the boiler.

A further object of the invention is to provide a regulator having ,a hollow member communicating with the boiler and operative by, differences in weight therein for controllingthe flow of waterto the boiler.

, A still further obj ectof the invention is to improve feed water regulators for generally successful commercial use.

tion will be apparent from the following specification and drawings and will be particularly pointed out in the appended claims.

In the drawings, Fig. l isan'enlarged vertical sectional view of the prefcrredeinbodiment of the invention, and r Fig. 2 is a fragmentary portion of a boiler showing the header and a glass with which my inventionis used. 1 V In Fig. 1 I have shown a chambered casing formed of top and bottom castings 5and 6, which have flanges 7 and 8, through which are passed bolts 9 and other fast ening means for, securingthese members in operative relation. The lower casting 6 ly disposed bridge 15 in which is screw threaded a valveseat 16 with which a valve17 00- operates for controlling theflow of liquid is provided with aninlet 10 and an outlet 11. Y

These have flanges 12, 13in which are provided bolt holes 14 atsuitable intervals, whereby the flanges may be secured to water pipes. It

willbe noted that the axes ofthe inlet: and

outlet openings are in alignment and in the drawings are shown as horizontally disposed.

T he casting 6 is provided with a horizontalvfrom the inlet lO'to the outlet 11. .Wh'en installed for feedwater regulation, the inlet 10 is connected by means ofsuitable pipe fittings to a; pump and the outlet 11 to the boiler. ,I prefer to mount my regulator above the boiler. The top casting 5 has a threaded collar 18 therein,in the bottomof which isthreadeda Valve seatemember 19, and, in the top spindle 29. The above and other objects of the invenof which is threaded an other valve seat mem v ber 20, the valve seats being indicated at 19 and- 20?, respectively. I provide a cup-like partition member 21,,which is interposed between the flanges 7 and 8' when the top and bottom castings 5 and 6 are secured together.

For making a water tight connection the low er face of the flange 7 is formed with an annular tongue 22 and the face of the flange 8 with a corresponding recess 23, the member 21 being provided with a'recess 24 for receiving the tongue 22 and a tongue25 forentering' the recess 23. The transverse or bottom portion of the member21 is provided with a centrallydisposed circular opening '26 vtherethrough which is of a relatively greater diameter than the diameter of the spindle 29 hereinafter described. This permits the fluid or water to flow above the bottom portion of the member 21- regardless of the position of the The valve which is adaptedto-enter a correspondingly shaped recess 28 inthe-lower end of the stem spindle 29. A. set screw 30 is provided for engaging end 31 of the, portion'27 for removably securing the valve in-position in the spindle. ,I/Vhen the valve and spindle'are'in position with the valve 17 at rest against the.

seat '16; theupperend of the spindle 29 is arranged to stop short ofthe bottom 2l 'of the partition member. The fiupper end of the spindle is provided with a central bore 31 for receiving-a cylindrical boss 32-attached'to 17 has a threadedportion 27 ative abovethe partition member. The piston comprisestop and bottom circular plates 33 and. 34 separatedby a filler 35 and fastened together by screw threaded members 36. If

desirable, the lower plate 34 and the filler35 may be made integral. The diameter of the filler .35fisless than the diameter of the plates 33 and 34.- A packing 36 is-inserted around the periphery'of the member-35 to prevent a horizontalportion 38,. wher'eby liquid may pass from oneside to'the other of the piston I the passage of liquid'by the piston head. The boss32 has a by-pass formedthereinconsist-- ing of avertically extending portion 37 and V tionof the plug 40.' The plugs 40 and 43 are providedwith centrally disposed openings 44 and 45 whereby a spindle 46 is permitted to pass. The lower end of the spindle carries valve members 47, 48 which seat against seats 19 and 20 under certainconditions. Between the members 19 and 20 a passageway 49 is provided having a threaded end 50 withwhich a pipe, not shown, may be connected and will lead 'to the boiler for relief purposes. The upper chamber, that is, the one formed between the partition member 21 and the valve seat member 19 has an upwardly directed passageway 51"ter1nina't ing in a horizontally disposed annular passage 52 between the seat member 20 and the plug 40. This is also for the purpose of relielf. I a

Cast integrally with the top casting 5 is an upright member 53 having a pivot 54 at its upper end on which is pivotedan arm 55. In'the arrangement shown the arm 55 is horizontally disposed. "A jaw 56 is connected by means of a pin 57 with the arm 55 and by means ot a nut '58 is connected to the upper end of the spindle 46 carrying the valves '47 and 48 for movement of the same under certain conditions. The arm 55 arranged with relation to the pivot so that a shorter end, that is, the end nearer the pivot, pro vided with a sliding weight 59 which by means ofa set. screw 60 may be secured in selected position along this end of the arm for adjustment purposes. The other end of the arm is provided. with forked members 61 which areprovidcd with elongated openings 2 in each of which openings is a pivot 63 secured to a band 64 surrounding a hollow member 65. The 1nen'1ber65 may be substantially cylindrical'as shown or may be circular in outline. At the lower end ofthe member 65 is a connecting nipple 66 and at the upper end is a similar connecting nipple 67.

The boiler shown in Fig. 2 has laterally ex tending leads 68, 69 in communication with the water space ot'the boiler and which leads enter a header 70. The water 71' is in communication with the header 'TO'by coni nections 72, The 7 1 andthe header are so arranged that the height of the water in the glass will bethe same as in the header. 'Leadingoutwardly from the middle portion of the header T0 is a flexible pipe, preferably of-copper, 74 and which is connected to the threaded nipple 67 of the hollow member 65. A bend 75 may be inter i posed in the pipe for purposes ofllexihility.

A similar pipe is connected with the lower connecting nipple66 ot'the hollow member '65 and lea ds into the boiler at 76.

The operation of the device is as follows The arrangement of the valves shown in Fig. 1 isthat when the valves are closed and no water is flowing to the boiler. The pipe 74 conducts steanito the interior otthe mempressure. lower chamber-it bears against the undersurber 65 through the nipplefi? when'the water level in the boiler is below the top of the connect-ion between the pipe 74 in the header 70. This steam condenses slightly and is returned to the boiler through the nipple 66 and the pipe 76. The parts are so arranged that when the Water level is below the high levelthe weight 59 will raise the hollow member 65 raising the valves 47 and 48 from their sea 19 and 20. The water or other liquid on' the inlet side 10 of the regulator is under Therefore as the water enters the face of the lower plate 34 of the pistonby reason of the opening 26 through the partition member 21 and 'someotthe water passes through the by-pass 37 and 38 to the upper side of the piston. The pressure against the lower side of the piston tends to raise the valve 17 from itsseat 16, whereupon liquid flows from the inlet 10 through the outlet ll through a feed line (not shown) to the boiler. As the water fills the lower chamber and tends to raise the piston, some of it will pass to "the upper side of the piston through the by-pass andglill the space in the upper. chamber and will also till the annular space 52, with some of the" water passing to theboil'er through the space 49 and its associated connections. By reason of the pressure of the incoming liquid there will be a greater pressure on the underside of the piston than on thetop, ten dingto raise the piston to its maximum limit owing to the fact that the pump pressure is normally greaterthan the boiler pressure. For limiting the upward movement of't'he piston a lrey 77 is provided passing through the spindle 29 and the boss 32 and projecting laterally of the spindle so asto bear against the under side of the portion 21' ott'he partition. The key is retained against movement by cotter pins 78 or other suitable fastening means. As the pressure on the upper-and lower sides or thepiston tends to become equalized the p1ston will approach a state of equilibrium 7 and therefore will be subject to any slight variation in pressure on either side. The device is preferably so arranged that the weight 59 balances the member 65 when it is hall full of water. As long as the water level in the boiler is belowthe-predetermined high level, which is that indicated at 79,-in Fig. 2,stea1n will pass through the pipe 74 "tothe hollow member 65, be condensedand returnedto the boiler. As soon as the water reaches the line 79admissionof steamto the hollow member 35 will be cut off and water will therefore flow throughthe pipe 74 into tlreliollow member 65 loy reason of the vacuum created by the the piston and equalizes the pressure on both sides of the piston. Hence, as the water from the inlet 10 continues to enter the'lower cham her it will pass to the upper side of the piston through the by-passes 37 and 88 until the valve 17 is seated. \Vhen equalization of pressure on both sides of the piston has taken place, the kinetic energy of the fluid, assisted by theweight of the valve, valve stem and piston, causes the closing of the valve 17. This condition prevails until the water level falls below the line 79 whereupon the steam is again admitted to the hollow member 65 and the water contained therein will drain back into the boiler through the nipple 66 and connecting pipe76 by reason of the member 65 being positioned above-the water level in the boiler. As soon as the member 65 is free of water it is raised by the action of the weight 59 opening the valves 17 and48'thereby reducing the pressure in the chamber above the piston to that of the boiler pressure, permitting the piston to be raised again by the pressure of the water coming in from the inlet side10 and the outlet side 11'. It will also be further noted that the weight of the piston together with the valve 17 assists in seating the valve 17 on the seat 16 when the pressure is piston.

\Vhat I claim is:

1. In a valve of the classdescribed, incombination, a casing divided into two chan bers by a partition arranged transversely thereof, said partition having a centrally disposed opening therethrough, said lower chamber having inlet and outlet openings therein, and a valve seat, a valve co-operatequalized on both sides of the ing with said seat and removably connected to a stem, a piston in said upper chamber having a projection passing through said partition and removably connected to said valve stem, a relief device above said piston comprising a balanced valve having two valve members connected together, valve seats therefor, said seats being apertured and communicating with a passageway to the boiler, and means responsive to the height of water in the boiler for actuating said relief device to control the operation of said main valve.

2. A feed water regulator including a chambered casing,a vertically movable valve and valve stem therein, an apertured partition across saidchamber through which-said stein passes, a piston on said. stein above said partition, said stem and piston being pro- 7 vided with an opening ftorm ng a bypass,-

a relief valve operatively arranged in the upper part of the casing for vertical movementtherein, means for moving said relief valve including a horizontally disposed arm pivotally mounted on said casing and operatively associated with the stem of said valve, a hollow member at one end of said arm, and a counter-weight near the other end thereof, and communicating, means between said hollow member and the boiler whereby a liquid or a vapor may be deliveredto the former as conditions in the latter change.

'3. In a device of the class described, a valve casing, a valve seat therein, a valve for said seat removably carried by a stem, a

piston atthe other end of the stem reinova'bly associated therewith, a key passing through said stem for securing said piston thereto, an apertured partition in said casing dis- 7 posed between the piston and the key, and a.

relief device'a bove said piston including a balanced valve operative by the height of the water in the boiler.

In testimony whereof I have signed n1 name to this specification on this 6th day of March A. D. 1923.

HEIhlRICI-I A. W. PETERSEN.

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