US1189111A - Feed-water heater. - Google Patents

Description

R. HOUSE.

FEED WATER HEATER.

APPLICATION man on. 5. m5.

1 ,1 89, 1 1 1 Patented June 27, 1916.

- '2 SHEETS-SHEET llily ease.

R. HOUSE.

FEED WATER HEATER.

APPLICATION FILED OCT. 5, 1915.

. Patented J1me 27,1916.

2 SHEETS-SHEET 2.

B COLUMBIA FMNOGRAPH co., WASHINGTON. D. c.

ROBERT HOUSE, OF ST. MARYS, PENNSYLVANIA.

FEED-WATER HEATER.

Specification of Letters Patent. 'Patented J n 27 1916.

Application filed October 5, 1915. Serial No. 54,237.

To all whom it may concern Be it known that I, ROBERT HoUsE, a citizen of the United States, residing at St. Marys, in the county of Elk and State of Pennsylvania, have invented certain new and useful Improvements in Feedater Heaters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to improvements in feed water heaters.

The object of the present invention is to improve the construction of feed water heaters and to provide a simple, practical and highly etlicient feed water heater adapted to be applied to any ordinary boiler and adapted when an injector or pump is in operation to cause a flow of water from the injector or pump through superheater tubes arranged within the boiler tubes in the path of the products of combustion so that the water passing through the superheater tubes will be heated to a tempera ture corresponding with that of the water in the boiler so that there will be no reduction in boiler temperature when the feed water is introduced into the same.

A. further object of the invention is to provide a feed water heater of this character equipped with means for automatically connecting the superheater tubes with the interior of the boiler when the injector is stopped so that there will be a circulation of water through the heating tubes to prevent the same from burning out.

IVith these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illus trated in the accompanying drawings and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings Figure 1 is a longitudinal sectional view of the boiler provided with a feed water heater constructed in accordance with this invention, Fig. 2 is a horizontal sectional view of the same on the line 2-2 of Fig. 1, Fig. 3 is a transverse sectional view the feed Water heater being shown in elevation, Fig. i is an enlarged detail sectional view of the double check valve, Fig. 5 is an enlarged detail sectional view illustrating the arrangement of the heating tubes.

Like numerals of reference designate corresponding parts in the several figures of the drawings.

In the accompanying drawings in which is illustrated the preferred embodiment of the invention, the feed water heater comprises in its construction a plurality of heating tubes or superheater tubes connected at their front ends at a point in advance of the front boiler sheet 2 by a transverse pipe 3 and located within the boiler tubes 4: so that the products of combustion passing through the boiler tubes will impinge. against them and heat the feed water to the temperature of the water within the boiler and thereby prevent any reduction in the boiler temperature when the feed water is introduced into the same. In the accompanying drawings two heatlng tubes are shown but a greater number of course may be employed to provide a circulation back and forth through the boiler tubes to effect the desired heating of the feed water. The feed water enters the heating tubes from an inlet pipe 5, and it enters the boiler 6 after leaving the heating tubes 1 by a return pipe or feed pipe 7 having a branch 8 extending into the boiler at the lower portion thereof. The heating tubes are preferably located at the upper portion of the boiler and the pipe 7 extends downwardly from the upper portion of the boiler to the lower portion thereof as shown in Fig. 1 of the drawings.

The' inlet pipe is connected by a union or coupling 9 with an intermediate horizontally disposed tubular arm or portion 10 of a double check valve having a vertically disposed body portion 11 which is connected at its upper end with the boiler by a pipe 11. The valve body is provided at its upper and lower portions with valve seats 12 and 13 with which cooperate upper and lower check valves 14: and 15 having outer flanged guiding portions 16 and '17 operating in upper and lower tubular members l8 and 19 which form the said valve seats. The lower end of the check valve body is designed to be connected with an injector and when the injector is Working water flows into the feed water heater and lifts the lower check valve and closes the upper check valve and passes through the heating tubes and into the boiler but when the injectoris not working the boiler pressure and the weight of the valve opens the upper valve and closes the lower valve and establishes a circulation through the heating tubes from the boiler so that there will be water in the heating tubes at all times and there will be no liability of the heating tubes burning out. The upper valve is provided with a depending valve stem 20 operating in a tubular guide 21 and interiorly threaded at 22 to receive a threaded portion 23 of a screw which has a head 2% at its lower end rounded at 25 to fit a concavity or seat 26 in the upper end of the lower check valve. The screw adjustably engages the interiorly threaded stem and a washer 27 is interposed between the head of the screw and the lower end of the tubular stem. The washer may be varied iii thickness and one or more washers may be employed to vary the length of the valve stem and the adjustable member formed by the screw to cause a proper seating of the valve in the operation. of the feed water heater. Any other suitable means may, however, be employed for providing an adjustable connection be tween the upper and lower valves so that when one of the valves Opens to the desired extent the other valve will be properly seated. The guide 21 which is formed integral with the body of the casing is located opposite the intermediate tubular arm or portion 10 and the double check valve which is preferably arranged in a vertical posi tion may of course be disposed. in any other suitable manner to suit requirements. The heating tubes are arranged in spaced relation with the boiler tubes and may be supported in any desired manner as by rings 28 having openings 29 for the passage of the products of combustion.

\Vhat is claimed is:

l. A feed water heater of the class de scribed including heating tubes designed to be arranged in the boiler tubes of an engine, a supply pipe connected with the heating tubes and the boiler, an inlet pipe communicating with. the heating tubes for supplying the same with water, a double check valve comprising a body having spaced valve seats, an interposed guide, spaced check valves coacting with the seat and adjusting means interposed between the valves and operating in the said guide.

A feed water heater of the class described including heating tubes designed to be arranged in the boiler tubes of an engine, a supply pipe connected with the heating tubes and the boiler, an inlet pipe communicating with the heating tubes for supplying the samewith water, a double check valve comprising a body having spaced valve seats, an interposed guide, spaced check valves coacting with the seat, one of the check valves being provided with a stem operating in the said guide and a threaded member adjustably connected with the stem and arranged to engage the other check valve. N

A feed water heater of the class described including heating tubes designed to be arranged. in the boiler tubes of an engine, a supply pipe connected with the heating tubes and the boiler, an inlet pipe communicating with the heating tubes for supplying the same with water, a double check valve comprising a body having spaced valve seats, an interposed guide, spaced check valves coacting with the seat,

one of the check valves being provided with a concavity: and the other check valve having a tubular stein operating in the said guide and interiorly threaded, and a screw engaging the threaded stem and having a rounded head adapted to fit in the concavity of the check valve.

In testinionv whereof I afiix my signature in presence of two witnesses.

, 7 ROBERT HOUSE. lVitnesses THOMAS M. I'IIGKEY, CHAS. J. SOHANT.

Copies of th'li p'at'iit my be obtained for java fce'nts cifemty eddicsshig the "Commissionci' of Patents. wnma m, "D. G.

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