US1150013A - Boiler feed-governor. - Google Patents

Description

L. J. BORDO.

BOILER FEED GOVERNOR. APPLICATION FILED MAR. 31. 1910.

1,150,013. Patented Aug 17,1915.

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L. J. BORDOQ BOILER FEED GOVERNOR.

APPLICATION FILED MAR. 3!; I910.

Patented Aug. 17,1915.

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was Y STATES PATIENT OFFTCE.

LAMBERT J'. BORDO, OF HILLSIDE, PENNSYLVANIA. I

V BOILER FEED-GOVERNOR.

a true and exact description, reference being bad to the accompanying drawings, which form a part hereof.

My present invention consists in an im. proved device for automatically governing the supply of feed water to steam generating boilers, and the general object of my in vention is to provide an efiective arrangement for the purposespecified, character-- ized by its comparative simplicity in construction and reliability in operation. I

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and forming apart' of this specification. For a better understanding of the invention however, and the advantages possessed by it, reference may be had to the accompanying drawings and descriptive matter in which I have illustrated and described forms in which the invention may be embodied.

Of the drawings: Figurel, is an elevation, partly in sectlon, showing a portion of I a boiler and the boiler feed governing mechanism therefor. Fig. 2 is a diagrammatic plan view illustrating the use of the invention where a battery of boilers are supplied with water from a single pump or a high pressure water supply system. Fig. 3 is a diagrammatic plan view illustrating the use of the invention where the governor is employed to regulate the supply of steam from the boiler to a steam pump delivering water solely for the boiler to which the gov ernor pertains. Fig. t is a partial elevation taken at right angles to Fig. 1, showing a small portion only of the apparatus shown in Fig. 1. Fig. v5 is a side elevation, and

governor mechanism differing in some respects'from that shown in Figs. .1 to 4 in elusive.

In the drawings, and referring first to the construction shown by'Figs. 1 and l, A represents the shell of a steam generating boiler and B a closed tank located above the-water Specification of Letters Patent.

J. Bonno, a

Patented Aug. 17,1915.

Application filed March 31, 1910. Serial No 552,494,

level of the boiler and, as shown, mounted on top of the boiler proper. A pipe C connects the interior of the tank B, adjacent its lower end, with the interior of the boiler below the normal water levelthereof. Similarly, a pipe C connects the upper end of the tank B to the boiler at the normal water level thereof. As shown, the pipes C and C extend through the boiler shell at the top, down to the proper levels. Within the tank Bis located a float in the form of a cup D shownfa's closed at its upper end by I the perforated cover D and, as provided w th a central sleevethrough which extends a rod D secured to the sleeve of the cup and to the cover by a pin D The lower end of the rojd'D is' guided in a sleeve Eheld in a bracket B rising from thebottom wall of the tank.

ing' through and screwed into the upper wall or cover B of the tank. The upper end of the sleeve F is closed except for an aperture through which extends a fine rod or small wire D secured'to theuper end of the rod D or rather to the extension I) there of. A stuffing box F, provided on-the up The upper end D of the rod DZ 1s fluted and enters a guiding sleeve F pass perend of the sleeve member F, prevents leakage along the member D Above the stuffing box F an, abutment is secured to the member D. As shown this abutment consists of an externally threaded split sleeve G which may be adjustably clamped 1n place by a nut G. The abutment G is engaged on'the underside by a yoke member H, the downturned ends H of which are engaged by the branches I of a counterbal ancing lever I fulcrumed on the bracket B' carried by the tank cover B 1 represents a counterweight adjustably secured on the body of the lever I. Adjacent its lower end the tank B is formed with an opening B which is closed by the base of a valve casing L. The latter is formed with two chambers L and L to which are connected i the pipes O andP.v The chambers L and Fig. 6 an end elevation of a portion. of a" L are connected by a valve seated port controlled by a'valve member M. In operation,

chamber formed in a member N threaded into the valve casing L and projecting into the chamber L Provision is made, as by the port M for obtaining a leakage from the chamber L into the interior of the hollow piston M and of the cylinder in which the latter works. The valve M is operated by a stem or operating device K which extends through a passage formed in the easing L into the tank B, where a reduced portion K is straddled by the bifurcated end of an arm J secured to a rock shaft J. Another arm J secured to the rock shaft J, enters a recess or passage D formed in the lower end of the shaft D.

In operation, the water level in the tank B rises above and falls to the level of the upper end of the pipe C accordingly as the lower end C of the pipe is above the level of or is sealed by the water in the boiler. It is of course entirely obvious that when the water level of the boiler falls loW enough to uncover the lower end of the pipe C, the water in the tank B above the connection to the pipe C will flow out under the action of gravity. When thereafter the water level in the boiler rises to cover the lower end of the pipe C, the tank B immediately begins to fill up with Water, for the steam in the upper end of the tank B conthe tank B. As the float rises and falls the valve M is moved toward and away from its seat through the connecting parts J, J, J i and K.

The float controlled valve L may be employed in different waysto govern the supply of water to the boiler in which the governor is applied. In Fig.2 where a number of boilers A are supplied with water from a high pressure supply system' which in the form shown comprises a pipe Q connected to the delivery side of a water pump R operated by a steam engine S. As shown in Fig. 2 the pipes P from the various governor controlled valves L are connected to the pipe Q and the pipes O are preferably connected to the corresponding boilers below the water levels therein. When the water level in any boiler A falls below the normal level the float in the corresponding governor tank B falls and opens the corresponding valve L thus allowing water to pass from the pipeQ to pipes P and O and valve L into the boiler. lVhen the water level in the boiler rises to the proper height the valve L is automatically closed. r

In Fig. 3 the pipe P from the governor valve L runs to the inlet side of the steam cylinder S operating the pump R employed to pump water into the boiler through the pipe It and the boiler-level governor directly controls the operation of thepump.

for the valve stem K where the latter passes through the portion of the valve casing L from the chamber L into the tank B. Preferably, the stem K should substantially fill the passage L but with the conditions specified there is no need for a tight fit, since,

with a loose fit, the leakage is practically.

negligible in amount since the pressure in the chamber L and. in the tank B are practically the same, each being substantially equal to the boiler pressure. Moreover any leakage which may occur, is practically harmless. A leakage along the stem K, when the latter substantially fills the passage L is restricted also by the fact that this passage, as shown in Fig. 1, is below the normal low water level in the tank B. The avoidance ofa stufling'box about the stem K is important. It is an advantage of course to avoid the expense of a stiuling box and particularly to avoid thenecessity for looking after a stufling box in this location.

In the second-place a tight packing about the stem K wouldfgreatly increase the frictional resistance to the operation of the governor and hence the omission of the stufiing box increases the effectiveness of the-appa-' ratus. The stuffing box F about the fine rod or wire D does not oflicr an appreciable resistance to the operation of the device because of the small diameter of the part D 1 The float is eiiiciently guided at top and bottom by the mechanism provided and in a manner which avoids any appreciable frie tional resistance to the movement of the float. Bymaking the float, as shown, of a thin cup of large volume filled with water, the specific gravity of the float is caused to approach quite closely to the specific gravity of the water, and this is an important factor in obtaining reliable operation, for since the weight of the floatis formed largely by the water contained in the cup shaped member B the specific gravity of the float itself will vary with the specific gravity of the water in the tank upon changes in the temperature of the water consequent upon variations in the boiler pressure.

' As a convenient means for indicating the conditions of. the apparatus, I prefer to arrange an indicator at some convenient point, as adjacent the water column X, for the boiler level indicating glass or gage connections, and in Fig. 1,1 have shown this in-.

dicator in the form of a slide Y, provided with an indicator point Y at its lower end, and mounted in a bracket X secured to the upper end of the water column, and connected by a flexible cord W running from the pulleys W to the end ofthe counterbalacing lever I. 7 Instead of the small counterbalancing lever arrangement shown in Figs. 1-4 inclucan of course use other counterbalsive, I ancing devices, and in Figs. 5 and 6 have shown the sleeve FA corresponding to the sleeve F of the first construction provided with trunnions F and have replaced the yoke H by a block HA carrying trunnions H and have provided springs U and U which act between and tend to spread apart the trnnnions H and F As shown, each of the springs U and U is in the form of a helix with one end extended and hooked about the trunnion F at one side of the apparatus and the other end extended and hooked about the trunnions H at the other side of the apparatus. The particular spring arrangement shown is advantageous for as the springs expand in moving from the full line position shown in Fig. 5 into the position indicated by the dotted lines in that figure the decrease in tension of the springs which occurs is compensated for more or less by the more effective manner in which they exert their pressure. The spring arrangement is of course more advantageous than the counterbalancing lever arrangement under some conditions of use as for instance in marine service.

' It will be readily apparent to those skilled in the art that the governor mechanism disclosed is effective andreliable and in particular is much more effective and reliable than governing mechanisms for the same purpose in which flexible diaphragms or hollow, air or gas filled floats liable to collapse are employed.

While in accordance with the provisions of the statutes I have herein illustrated and described the best forms of my invention now known to me, it will beapparent to those skilled in the art that changes may be made in the form of the apparatus disclosed without departing from the spirit of my invention and that certain features of the construction disclosed may be used with advanta ge under certain conditions'without a corresponding use of other features of the in-, vention.

Having now described my invention, what thereto,

I claim as new, and desire to secure by Letters Patent, is: V

1. The combination, with a boiler, of a governor controlling the supply of water thereto and comprising a structure formed with two valve chambers connected by. a

valve seated port, a tank chamber, and apassage leading awayfrom one of said valve chambers to the interior of the tank chamber, said tank chamber being located above the normal high water level line of said sage opens into said tank chamber, a bale anced valve controlling said port and operating connections between the float and the valve, comprising a member extending through and loosely filling said passage.

2. The combination, with a boiler, of a governor controlling the supply of water comprising a closed tank located above the normal high water level line of the boiler and formed with an opening in its wall, and a valve controlling the flow of feed water to the boiler, said valve including a casing attached to the tank and closing said opening thereof and being formed with two.

valve chambers connected by a valve seated port and with an opening connecting one of said chambers with the interior of said tank through said tankopening, a'pipe connection between the last mentioned valve chamber and the boiler, a valve proper controlling said valve seated port, a float in said tank, an operating connection between the float and the valve including a member extending through and loosely filling said valve casing opening, a pipe connection between the .upper end of the tank and the boiler at one level thereof, and a second pipe connection between the lower end of said tank and the boiler at a level of the latter below that at which the first mentioned pipe connection is connected to the boiler.

' LAMBERT J. BORDO. Witnesses:

ARNOLD KA'rz, D. STEWART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. p

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