US517949A - Steam generating - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. G. W. HICKS.

STEAM GENERATING APPLIANGB. No. 517,949. Patented Apr. 10, 1894;

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(No Model.) 2 Sheet-Sheet 2.

C. W'. HICKS. STEAM GENERATING APPLIANCE.

No. 517,949. Patented Apr. 10, 1894.

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UNITED STATES PATENT OFFICE.

CHARLES W. HICKS, on ASHBURN, GEORGIA.

STEAM-GENERATING APPLIANCE.

SPECIFICATION forming part of Letters Patent No. 517,949, dated. April 10, 1894. g

I Application filed January 24, 1894. Serial No. 497,890. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES W. HIoKs, a citizen of the United States, residing at Ashburn, in the county of'Worth and State of Georgia,haveinvented certain new and useful Improvements in Steam-Generating Appliances; and I do 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, reference being had to the accompany ing drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to those hollow-grate steam generating appliances which accelerate the generation ofstearn and at the same time induce a circulation of water through the boiler, and my object is to provide means which will more perfectly accomplish such purposes. 1

To this end my invention consists in the employment of hollow-grate bars of peculiar construction, in combination with certain cooperating mechanism all of which will be more fully described hereinafter and-pointed out in the claims.

Referring to the accompanying drawings: Figure 1, represents a side elevation of a boiler and furnace having my improvements applied; Fig. 2, a plan view of a grate and its connections; Fig. 3, a view in cross-section of the grate, and Figs. 4 and 5, detail sectional views of a modified form of the grate bar.

The reference letter A, indicates the boiler which is here shown as one of the water tube type, though this may obviously be varied to suit the exigencies of the occasion. The boiler A, has arranged below it the furnace A, and this may also be of any preferred form.

a is the fire box, and B is thegrate which is arranged therein so that when the fire is built a draft space will be left below. The grate B is composed of a series of bars extending longitudinally with the boiler and separated from each other a distance great enough to admit of a draft between them. These bars are rectangular in cross-section and are formed hollow for the passage of the water. Arranged in each end of the bars B and communicating with the hollow portion thereof, are the independent downwardly extending tubular elbows B, and these elbows are provided at their outer ends with flanges b, the said flanged ends being adapted to engage with the corresponding ends of the neighboring elbows, and to be joined by bolts or rivets passing through the flanges suitable asbestus packing being interposed to effect a tight joint. The elbows B are so arranged that each of the bars B, will be connected serially to each other, whereby a stream of water may pass from the end of one bar through all the'ot-hers and out atthe end of the opposite bar, thus establishing the circulation through the grate and whereby the bars are permitted to expand and contract laterally 'and longitudinally at their ends without springing a leak or causing injury to the connections. I

In some cases where saw-dust and other dense combustibles are used as fuel, it will be necessary to provide more draft than can be had from the spaces between the bars B, and to this end I core the bars transversely. This is done by extending vertically through the bars, short sections of tubing, 0, so as to form draft passages through the grate. By multiplying these passages avery strong draft may be obtained without materially retarding the circulation of the water through the bars.

Communicating with the upper portion of the boiler is a steam pipe 0 provided with a valve N, and which extends downwardly to the injector c. This injector is in connection with a downwardly extending tube D, and this tube after projecting below the grate bends horizontally and upwardly and communicates with the bar B which is located on the left-hand extremity of the grate. By this means water is conductedfrom the injector to the grate, and the injector c is used to feed the boiler by way of the grate, as will be more fully explained hereinafter.

Secured to the end of the elbow B on the extreme right-hand grate bar is the tube (1, which projects downwardly until the mud drum E is reached with which drum it makes connection. Fitted to the drum E and having communication therewith is the second tube E, which extends upwardly and thence outwardly to the outside of the furnace, where it proceeds upwardly again and communicateswith the lower portion of the boiler A.

e indicates a check valve which is arranged in the tube E at a point near the boiler, and by which the passage of the water through the tube, and into the boiler may be regulated.

Entering one end of the mud drum E at its lower side is the blow-off pipe E, which is provided with the usual valve F, by which the fiow may be checked. The purpose of this blow-0E arrangement is well understood since its use in steam generating is common. It will be necessary, at times, to clean the grate bar so that the accumulations of sediment and other objectionable matter may be removed. This I attain by means of the blowoft pipe f, which is provided with a valve f, for regulating the flow of water in the bars.

It will be necessary to provide, in addition to the check valve e, a second valve G, and this I arrange in the pipe D just below the injector o. By the use of these two valves the circulation through the system is more efiectually stopped, and the strain occasioned by the pressure of water is equally distributed between each.

The modification of Figs. 3 and 4 consists of a form of grate bar, wherein each bar is provided with two independent longitudinal passages for the circulation of the water, and these passages communicate with each other at the end H, while the remaining end H, is open and adapted to communicate, by way of the elbows h, with the corresponding end of the companion bar. These bars are not perforated or cored transversely but are adapted to be arranged such a distance apart that the desired draft may be attained. As another modification I sometimes take the water from the mud drum up to the boiler through a pipe such as H, in Fig. 4. Thus it will be seen that the water from the boilerA, is kept circulating through the grate B and mud drum E, and, owing to this fact, the heating of the water in the boiler is greatly facilitated while the sediment and other objectionable matter that will reside in the water is collected by the drum E, from hence it may be removed by the pipe F.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a steam generating and circulating apparatus, the combination with a boiler, of a hollow grate, a pipe connecting the boiler and grate, an injector connected to said pipe and by which the primary circulation of water therein is started, a mud drum in connection with the hollow grate and a second pipe communicating with the boiler and with the mud drum, whereby the water from the boiler is made to circulate through the grate and mud drum and whereby its heating is expedited and its sediment removed, substantially as described.

2. In a steam generating grate of the class described, the combination with perforated hollow grate-bars, of flanged coupling pipes alternately located at opposite ends of said bars, and extending below the same, the flange being provided with perforations and fasteners, whereby suitable packing material can be interposed between them, and whereby the bars can be disconnected separately, as and for the purpose set forth.

3. In a steam generating apparatus, a hollow grate composed of rectangular hollow bars provided with a plurality of draft openlngs therein, coupling pipes located at and connecting the alternate ends of said bars, said pipes being arranged to extend below the bars and being provided with perforated flanges and fasteners adapted to enter said perforations to lock the flanges together, receiving and discharge pipes connecting the opposite extremities of said grate with the boiler, a mud drum interposed within the circulation of said pipes, and an injector and blow-ott pipe, all arranged and adapted to operate in the manner and for the purpose substantially as described.

4. The herein described grate having receiving and discharging pipes connected at opposite ends thereof, said grate being composed ofperforated rectangular hollow bars, in combination with coupling pipes located alternately at the opposite ends of the bars and provided with flanges adapted to be placed face to faceand to have suitable packing material interposed between them, and devices for clamping said flanges together, whereby the grate-bars are permitted to expand and contract, and can be removed, in the manner and for the purpose substantially as described.

5. The combination with a boiler, of a water grate composed of a series of hollow rectangular bars provided with a plurality of perforations or draft openings, flanged coupling pipes connecting the alternate ends of said bars to effect a zigzag passage through the grate, receiving and discharge pipes con-necting the opposite ends of said grates with the boiler at a point below the water line, a mud drum included within the water circuit, a blow-oft valve and an injector, substantially as described.

6. A water grate composed of a series of hollow grate bars connected alternately at their opposite ends by means of independent flanged pipes or elbows such as B whereby the bars are allowed to contract and expand, in combination wit-h a boiler and pipes connected to maintain a circulation in the boiler and grate, substantially as described.

In testimony whereof I atfix my signature in presence of two witnesses.

CHARLES W. HICKS.

Witnesses:

J. S. BETTS, Z. BASS.

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