US1777645A - Boiler-feed-water control - Google Patents

Description

' Oct. 7, 1930. v o. B. KIBELE 1,777,545

BOILER FEED WATER CONTROL Filed Dec. 15, 1926 I/VVE/YTOHQ 0770 B. Irma-1.5

2/ W arrow/H.

to the boiler 2.

Patented Oct. 7, 1930 PATENT OFFICE o'r'ro :e irinnrn, or WILMINGTON,CALIFORNIA.

BOILER-FEED-WATER ooitrnon l i Application filed. December 13, 1926. Serial No. 154,413.

An objectof my invention is to provide anautomatic feed water control for boilers operatingon the thermostatic principle and in which the expansibleelement is not direct Li ly connected to the control valve.

1 Another object is to provide a feed water [control of the character stated which will accurately maintain a water level in the boiler. I y

A feature of my invention consists in the inclined eXpansible tube, the inclination serving to make a more sensitive control.

A further object is to provide a balanced valve feed Water intake.

A still further object isto provide a feed water control in which the expansible element is accurately guided and prevented from buckling or Warping.

Still another object is to provide a feed 29 water control which is simple in construction and efieetive in operation.

Other objects, advantages and features of invention may appear from the accompany ing drawing, the subjoined detailed description, and the appended claims.

In the drawing- Fig. 1 is a fragmentary side elevation of a boiler with "my control mounted thereon. Fig. 2 is a side elevation partly in section of my control. p

Fig. 3 is a plan view of my control. p Referring more particularly tothe drawing: v i i My control 1 is mounted on a boiler 2 which boiler comprises a steam dome 3 and the normal Water level in which boiler is indicated at 4. My feed water control 1 includes a valve cage 5 and a waterintake fitting 6. The cage 5 andfitting 6 are connected adjacent'the lower end thereof by an angle bar ,7 whichbar is suitably secured to ears 8, 9

on the cage 5 and fitting 6, respectively. 9r pair of rods 10, 1O aresecured to and extend between the cage 5 and fitting 6 adjacent the upper end thereof. The cage5 is provided. with a feed water intake opening 11 into which the feed water pipe'12 is threaded. A- feed water outlet opening 13 is also provided in the cage 5 and a pipe M extends therefrom A valve 15 is seatedin tlie'cageo nor mally closes the passage between the open ings 11, 13. A'horizontally extendingvalve stem 16 is secured to the valve 15 and pro- .jects from the cage'5 through a packing gland 17. A reduced neck portion 18' extends rearwardly from the valve 15 and connects said valve and a piston 19, said piston beingadapted to reciprocate in a nut 20 threaded into the rear of the cage 5. The piston 19 serves-to 'guide the valve 15 and insure its accurate seatmg at all times. i

The valve 15 is balanced in the'following manner; The reduced section 18,causes an equal pressure on the rear of the valve 15 and the front face of the piston 19. If any water should leak past theapiston 19, I have provided a port 21 which port extends from the rear-of the piston 19 through the valve 15'and bleed holes extend-into said, port and 7 open intozthe passage 18, thus any excess pressure;

A rider23 is slidably mounted on the rods 10,.1Oand a tube 24 is secured in said rider and inthe fitting 6; said tube is inclined upwardly at an angle the purpose of which will be furtherrdescribed. A pipe 25 is secured in the fitting 6 and extends to the boiler '2 belowthewater level therein, thuspermitting water to be transmitted from the boiler to the tube 24. Th at is, the \vater'in the tube will be at the same level as that in the boiler.

' A pipe 26 is securedin' the rider 23, said pipe extending to'thesteam dome 3, thus transmitting steam from the dome to the up per endoi": the tube In mounting my control I prefer to so posit-ion .the inclined tube 7 24that the normal waterlevel 4 in the boiler will be at abouta central point in the tube. It will be apparent that as "the Waterlevel in the boiler lowerathe steam from th pipe26 will fillfa greater portion of ,the"tube,h .thus.

tending to raise the temperature thereof, and

' causing its expansion for a purpose to be tube to rapidly heat, or cool as the case may be, and will maintain a practically constant Water level in the boiler. To prevent buckhn g or Warping of the tube 24 during its contraction and expansion, I provide guides 27, 28 which are secured to the bars 7 and said tube 7 being slidably mounted therein.

P A finger 29 depends from the rider 23,-'and the stem 16 extends therethrough, an adjusting nut 80 screws on the stem*16 against the 'front of the finger 29 and a second adjusting nut-"3l-screws against a rubber packing-32 whichpacking bears against the rear of the finger. Thus it will be seen that as the tube 24 expands and contracts the rider 23 will be moved along-the rods 10, '10, which movement is transmitted through the finger 29 directly to the stem 16 to open or close the valve 15, and thus permit the feed water from the pipe 12 to pass into the boiler, or closing said pipe and stopping the flow of water as the case may be. 1 e

A brace rod 33 is secured at one end to the fitting 6 and at the other end to thepipe 1 2, thus the fitting is prevented from moving, due to the expansion and contraction of the tube the valvewhereby longitudinal movement of the tube will act to open and close the valve, said balanced valve comprising a valve-head, a piston, a constricted portion connecting the valve-head and piston, said valve having a passage therethrough and ports extending into the passage, said ports being adjacent the valve head, whereby pressure is equalized on both ends of the valve.

2. A feed Water control for boilers comprising a valve cage, afeed water intake pipe for said cage, a feed water outlet pipe from said cage adapted to extend to a boiler, a valve in said cage controlling the feed water intake, said valve comprising a valve head, a piston, a constricted portion connecting the valve head and piston, said valve having an opening'extending therethrough and ports adjacent said valve headextending into the opening whereby pressure is equalized on both ends of the valve, a fitting, a pipe adapted to extend from the fitting to the water space of the boiler, an inclined tube, means adapted to connect said tube to the steam in the boiler, and means connecting said tube and the valve whereby longitudinal movement of the tube will act to open and close the valve.

In testimony whereof, I aflix my signature.

7 OTTO KIBELE.

24. A drain cock 84 is provided in the, fitting i 6 by means of which the tube 24 may be cleaned. The adjusting nuts 30, 81 permit theadjust-ment'of the valve 15 relative to the rider 23 so'that movement of said rider will properly open and close the valve.

Therubber packing 32 permits further contraction of the tube 24 and movement of the rider 23 as the valve is closed without damaging said valve. The direct connection of the tube 24 to the valve stem 16 permits a more accurate opening and closing ofthe valve and also prevents the surge of the feed Water into the boiler. The arrangement of connecting bars 7 and rods 10, 10 rigidly braces the fitting 6 so that any longitudinal movement of the tube 24 will be transmitted in its ene tirety to the rider 23.

. Having described my invention, I claim 1 I 1. 'An automatic feed water control for boilers comprising a cage, a balanced valvein said cage, a 'feed waterintakefpipe extendinginto said cage, an outlet pipe extending from said cage and adapted to be connected to a boiler, a fitting, a pipe adapted to ex} 7 tend from th e fitting to the, water space of the boiler, a rider, means slidablyjmounting -tl1erider,a steam pipe e'Xtending'to the rider,

an inclined tube connected to the fitting and the ri der, and means connecting the rider and i v

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