US1059302A - Combined automatic trap and damper control for steam-heating systems. - Google Patents

Description

P. J KELLY. COMBINED AUTOMATIC TRAP AND DAMPER CONTROL FOR STEAM HEATING SYSTEMS.

APPLICATION FILED NARA, 1912.

Patented Apr. 15, 1913.

women cOLuMB A I'LANUOMAPN C0,, WASHINGTON, n u,

PATRICK J. KELLY, OFDENVER, COLORADCL.

COMBINED AUTOMATIC TRATPi-ANI) DAMPER CONTROL FOR STEAM-HEATING SYSTEMS.

1,059,302. 7 l spwificetionofIlettersPatenh. PatentedApr.15,1913;

Application filed March 4, 1912. Serial No. 681,424.

To all whom it'mag concern: Be it; known that I,IPh'rn1o1c; J. IQELLY,

citizen of the United States, residing in :the

city and county of Denver 1 and State of Colorado, have invented certain: new and useful Improvements in'a Combined Automatic Trap and Damper Control for Steam- HeatingSystems; andI do declare the fol lowing to be afull, clear and exact descriptionof the invention, such as will enable.

others skilled in the art to which it appertains to make andusethelsame, reference being had to the accompanying drawings, and to the characters of reference marked thereon which form a partof this specific-a tion.

My invention relates tola combined automatic trap and damper control for steam heatingsystems, my objectbeing to prevent, the water in the boilers of steam-heating a systems from passing upwardly into the As the steam rushes fromthe boiler into the.

pipes, a partial vacuum1is produced causing the water to rise and enter the pipes to a greater or less extent. This water is carried along by the steam and wherever there is a turn or an abrupt bend inthe pipes, the

water strikes with considerable force, producing a noise resembling pounding; upon the pipes. Not only are noisesproducedin the pipes by the water as aforesaid, but this, water also carries impurities into the pipes, such as grease and sand, which also lodge in the radiators and other parts of the systern, causingmuch'trouble as well as wear upon the pipes and valves; Furthermore, it. often happens that the water is carried out. 30f the boiler into the pipe system on the in-:

let side to such an extent that the water falls sufficientlyin the boilertoal'low. a considerable area thereof to become red-hot, or

heated to such an extent that the return iwater to the boiler through the return pipe will result-in cracking the boiler sections or in producing explosions. Explosions from: this cause have sometimes resulted. not only in the destruction of property but also :in; loss of life. As the return .water, whiohlis practically cold, rises in the boiler and comes in contact with the red-hot areas of tl1e1at-1 i ter a result as heretofore stated follows, similar to thatproduced by turning cold water into ahot empty boiler.

My object is to overcome this difficulty and when my improved device is employed for this particular purpose, it is mounted in close proximity to the boiler, preferably directly above the same, or atone side thereof, 1 as may be desired. Provision is made whereby, before the water can enter i the pipes of the system, it enters a trap in which is located afloat As the water fills the trap, the float rises and closes a valve which cuts 3 off communication between the boiler aud t-he 1 pipes of the systenn Thestemof the float-l operated ivalve is connected through the in-: strumentalityof a lever and chains or other suitable flexible devices, with a damper, the connection being such that when the float-1 operated Ivalve closes to cut off water communication between the boiler and the pipes of the system, the damper will also be closed i to cut off the draftof the furnace or fire 1 box used in connection with the boiler. The a return pipe is equipped witha check valve 1 to prevent the direct escape of water from 1 the boiler into this pipe when the valve (hereinafter explained) is closed on them-1 5 leteside of the system, whereby there is. an 1 increase of pressure in the boiler which 1 otherwise might result in the passage of water directly from the boiler to the pipes of T the system through the return pipe.

My improved construction is arranged to operate in harmony with a damper-regu-a lator of the expansion class the said regu lator being. of the bellows form and arranged. to expand as the temperature of the boiler 5 rises. This regulator also acts upon the same lever that forms a part of the dampen control in my improvement, butthe two may operate entirely independently of each other;

For instance,the expansioneregulator con-11001 structed on the bellows principle depends 1 entirely upon the steam pressure in the system.

for 1 its operation to open and close the damper. On the contrary, in my improvement the water :may act upon the float in:

the trap \toqclose the valve and close the. damperbefore the steam pressureissufii -l cient to act upon the expansion-regulator to close the damper.

My improved trap is interposed between:

the boiler and the inlet for steamlto the sy stern, and is sufficiently sensltive to i be op erated by a comparatively small amount'of; water on its way to the pipes of the system Having briefly outlined my improved con struction I will proceed to describe thesame l in detail,'reference being made ,to the accom an in drawinoin which is illustrated an embodiment thereof.

In this drawing: Figure 1 is a side GlEVEL".

. tion of a boiler equipped with my improveinent.

Fig. 2' is a vertical section taken through the trap, the parts being shown on a larger scale- Fig. 3 is a similar view taken at right angles to Fig.2.

' The same reference characters indicate the same parts in all of the views.

Let-f-the numeral 5 designate a trap or receptacle} for water which, as-illustrated in the 'drawi-ng, is supported above the boiler shown at C whereby the water of 'condensation, as well as any water which may have accumulated in'the trap during theoverflow from. the boiler, isidrained back into the lower portion of the latter.

7 Above the trap 5 and in communication therewith by a relatively large opening D is a casingE in which is located a disk valve 9, this valve being mounted ona stem 10 journaled in the casing, the stem passing through a stuffing-box atone side of the casing whereby a. steam and water-tight joint is formed.

I 015 the latter.

The stem 10 where it extends through the stu fling-box'F has its outerextremity connectedflby means of a crank-arm 12 with a chain 13, the said chain being connected at its lower extremity as shown at Gr with one arm of a lever 14, which is fulcrumed :as shown at H F0111 an expansion-damperregulator 17, connected with the water of the boilerwto be controlled by the temperature The opposite arm of the lever is connected as shown at I with a chain furnace as shown at J. I

From the :foregoing' description 15which leads, to a damper 16 hinged to theit i will be understood that if the ,water rises from thejboiler through'the pipes 18, on its way to the pipes of the steam-heating system, it

. must "first enter the trap 5 carrying float 8. As the water fills this trap the floatwill rise and by virtue of its'connection with the disk-valve 9, will close the latter and cut off communication between the trap and the" casing E,'--and -consequently cut off 'comis interposed between the trap and the said pipes." Asthe valve closes, a partial rotary return pipe 21.

movement is imparted to thestein'll) whereby the crank 12 is actuated to lift one arm of the lever 14: and depress the other arm,

the depressed arm being connected with' the damper whereby the latter is allowed to close by gravity, Ordinarily this damper will be closed through the medium of the valve 9 before the expansion damper-regulator would act to close .the damper. In any event, the two devices work in complete harmony and may operate either in conjunctionor independently of each other.

In order to successfully carry out my improvement, it is in every way advisable, if

not absolutely necessary, that the, return pipe 21 be equipped just outside of the boiler with a check-valve 22, which, while allowing 3 the water of condensation to return freely to the boiler from the pipe 21, is arranged; to prevent the escape of water from the boiler directly into the pipe 21. This is exceed-f ingly important since,'when the valve 9 is,

water and steam are concerned. Hence, with the check valve from the pipe 21, there would be nothing to prevent the water,un der the increased. pressure in the boi:ler,from escaping into the pipesystem through the Having thus described my invention, what I claim is:

1. The combination in a steam heating" system comprising the boiler, its fireebox and the pipes of the system, of a trap in communication with the'top of the boiler, a valve interposed between the trap and the steam supply pipes of the system, a float located within the trap, a damper connected in operative relation with the float ofthe trap, substantially as described. I

2. The combination with a boiler, its fire-- box and the pipes of a steam-heatingsystem, of a trap-in communication with the topofthe boiler by pipes enteringthexupper part of the trap, a float within the trap, a valve {casing located above the trap and incommunication therewith at the bottom, said casing being in communication at. the top I with the pipes of the system, a floatlocated' in the trap, a valve located in the casing above the trap, the float having a stem connected with the valve to close the latter as the float rises in thetrap, a stemupon which 'the valve is mounted, the said stemextending beyond the valve casing, a lever suitably fulcrumedin proximity to. the boiler, anop- .erative connection between the said stem and;

cut off the draft, substantially as, described' 3. The combination witha steam-heating system comprising a boiler, the furnace thereof and the pipes ofthe system, of a,

trap in communicationtwith the top of the boiler, a float located inisaid trap, a valve casing mounted above the trap and in com: munication therewith, said casing being also in communication with :the steamusupply pipes of the system, and a valvelocated in the casing and connectedin operative relation with the float whereby the valve is closed wheneven water rises intothe trap.

4. Thecombination with a steam-heating system, comprising a, boiler, the furnace thereof having a damper and pipes of the system, of a trap in communication with the top of the boiler, a float located in said trap, a valve casing mounted above the trap and in communication therewith, said casing being also in communication: with the steam supply pipes of the system, a valve located in the casing and connected in operative relation with the float, the said valve having a stem extending beyond thecasingand an operative connection between the valve stem and the damper of the boiler furnace,whereby if the valve is closed the damper will be actuated, substantially as described.

5. The combinationwith a,b0i1er,,its furnace, and the pipes of a steam-heating; sys- Gopies of this patentmay be obtained for tem, of a trap in connection with the top of the boiler, a valve interposed between said trap and the steam supply pipes of the system, and means connected with said valve and adaptedto be acted upon by the rising; of water within the trap for closing said, valve.

6. In a combined automatic trap and dame,

per control for steam-heating systems, the combinationzwith the boiler, its furnace and the pipes of the system, of a trap interposed:

between the boiler and the steam supply pipes of the system, a float located inasaid trap, a valve connected with the float for cutting, ofi'i communication between the boiler and the steam supply pipes when, waterrisesinto said trap, a damper connected with theifurnace and in operative con: nectionbetween the valve and the damper whereby, as the valve is actuated through the medium of the float, a corresponding movement is imparted to the damper.

7. The combination with a furnace, the

boiler and the steam supply pipes of a,

steam-heating system, of a trap, the top of which is in communication, with the ,upper: portion of the boiler, a float in said trap, a,

valve, casing interposed between said trap and the steam supply pipes of the system,

an operative connection betweensaid float and valve :whereby the, valve is closed when water risesint-o said trap,and a retum pipe from the bottom of said trap to the boiler. In testimonywhereof I aflix my signature in presence of two witnesses.

PATRICK J. KELLY] Witnesses A. J OBRIEN, F. E. BownN.

fivecents each, by addressing the Commissioner of, Patents, Washington, D. 0.,

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