US820783A - Grate and fuel feeder. - Google Patents

Description

No. 820,788. PATENTED MAY15, 1906. E. HARUHARIOK, GRATE AND FUEL FEEDER.

; APPLICATION FILED APR.1,1904

2 SHEETS-SHEET'I.

.No. 820,783. PATENTBD MAY 15, 19 06.

E. HARGHARIGK. GRATE AND FUEL FEEDER. AAAAAAAAAAAAAAAAA 1 3,1. 1904.

itirisr ribs.

ElilltO HAHUHARICK, F WlLKES-BARRE, PENNSYLVANIA.

GRMTE AND FUEL FtliDkELlk.

, Specification of Letters Patent.

resented May 15, 1906.

Application filed April 1, 1904:. Serial No. 201,121.

This invention relates to fin'naces and stokers, and has for its object the provision of apparatus which is especially adapted for burning the small sizes of coal.

In the accompanying drawings, Figure 1 is a vertical section of a furn ace and stoker arranged beneath a boiler and embodying my invention. Fig. 2 is a transverse section of the stoker on the line a f) of Fig. 1. Fig. 3 is a plan view of the grate, certain of the secchambers are suitably connected to form a refractory walls 7 and 8 frame, which is rotatably supported by Wheels 5 and 6 and supports the grate and about the interior and exterior edges of the grate. Rotation of the frame, and with. it the grate, may be accomplished by means of a circular rack 9, connected to the frame, which engages with a pinion 10, connected to a driving-pulley 11.

The grate is divided into radial sections, each. comprising two parts 12 and 13, hinged to a radially-extending bar 14, rotatably mounted in the frame. The parts 12 and 13 are normally held in horizontal position by suitable means, as sliding bolts 15, secured to the grate portions and adapted to enter sockets in the side walls of the ash-chamber. Upon the release of bolts 15 the parts will swing into a vertical position, as indicated by the dotted lines in Fig. 4, and their contents be emptied into an ash'chamber E. The parts may be returned to the horizontal position by means of an arm 16, iixcd to the bar 14, which may be moved against the bottom of either part by turning the bar 1'4 by means ofa Wrench applicd to its outer end or in any other suitable manner. After having been thus returned the parts may be secured by refastening the bolts 15.

An ash-chamber E is located beneath each section of the grate and is inclosed by inclined side walls 4, which may be curved, as

shown, to afford clearance for the swinging grate portions 12 and 13, the outside wall 1,

, and the bottom 2, which slopes downwardly from the center of the frame to a point near the wall 1, at wluehpoint 18 located an exit for ashes, which passes over an ash-pit 28 and is normally closed by a door 17. Suitable means, as a chain 18, secured to a spring-barrel 1S), may be employed for normally holding the door closed. Preferably the walls 4 extend between the grate-sections.

Beneath and between the ash-chambers is the air-chamlwr F, iuclosed by the-side walls and bottoms of the ash-chambers and the bottom 3 of the frame. This air-chamber conununicates with the ash chambers by openings 21) in the side walls, which may be closed by doors 2] operated byhandles 22 or other suitable means. The air-chamber also communicates by an opening 23 with a pit .24, communicatiug, by means of an opening 25, with an air-blast. The forcedair may be controlled by means of doors 26 in the opening 23, operated by handles 27.

The stoker C extends over the grate and comprises a radial conveyor, which may be a screw 29, fitting within a tube or casing 30, which. conununicates upon the outside of the furnace with a fuel-supply chute 31 and within the furnace with a chamber 32, in which is rotatably mounted a feeder, prefer ably a fluted cone 33, for feeding the fuel, the chamber 32 having openings 34 for the passage thereof. The shafts of thescrew and cone are driven by any suitable means, as by earing them to a power-shaft 38, as shown.

The Stoker is surrounded-by a water-jacket 35, in which holes 36 are provided for the passage of the fuel. Preferably tubes 37 are secured to the wall of the chamber 32, surrounding the holes therein, and extend into the holes in the wateejacket to roperlydi root the fuel. The jacket may lie fed by a water-pipe 35, which may conveniently extend up from the air-pit through the center of the grate, as shown. The water-jacket affords protection from the heat of the furnace to the working parts of the stoker, and the heated water may be employed for feeding the boiler, as through a pipe 39, connected to a hot-well, injector, or other boiler-feed source. A blow-ell cock 40 near the bottom of the water-jznsket should be provided. In operation, as the grate revolves fuel will be distributed radially by the stoker, and the rotating of the grate will cause the fuel to be evenly distributed over its entire surface. If the substance upon the grate becomes too thick,

the rotation of the grate is stopped by any suitable power-disconnectingmeans. The

air-blast is then cut oil' from the particular ash-chamber by means of the door 21-. ,The

supporting-bolts are then Withdrawn, when the grate parts will swing downwardly, emp' tying their contents into the ash-chamber.

The grate parts being then returned to the horizontal position and secured in a manner as before described, "lire may be raked from the adjoining gratcssections upon the one just emptied, and upon reconnecting the power it will move under the. stoker and there receive a fresh supply of fuel. In a similar manner all the grate-sections maybe succes. sively dumped and resupplied with fuel. i

Either ash-clnnnber E may be relieved'of its contents whenever desired by opening the door 17 of said chamber when it is over the aslrpit. The speed of the grate and the supply of fuel are preferably so regulated that a grate-section will make a number of revolut-ions after it has been dumped before the tire upon it becomes too heavy.

While I have illustrated my invention in' Whatl consider one of its best applications, it may be embodied in other constructions, and]. do not, therefore, wish to be limited to that shown.

- Vl ithout limiting myself to the precise construction shown and described, l claim 1. in a .l'urnaee, the combination with a frame inclosing an ash-chamber of a grate carried by said frame, and means for revolving said frame, substantially as described.

. 2. In a furnace, the combination with a frame inplosing air and ash chambers, .of a

grate carried by said frame, and means for revol\"ing said frame, scribed.

3. lna furnace, the combination with a revolving frame, of a sectional grate, supported by" said frame and having in each section a plurality of independently-swinging plates, means for detachably securing said plates in operative position, and means adjacent each section of the grate for successively restoring substantially as dethe plates thereof to operative position alter they have been dumped.

4. In a furnace, the combination with a revolving frame, of a sectional grate supported by said frame and having in each section thereof two plates adapted to swing inde-. pendently about a common axis to dump the load thereon, means for detachabl y supporting said plates in operative position, and means movable about the axis of the plates of each grate-section to restore said plates to operative position after they have been dumped.

5. In a furnace, the combination. with a revolving frame, of a sectional grate supported by said frame and having in eachscction thereof a plurality of indepcndently-swinging plates, an ash-chamber rotating with the grate and,divided into a series of compartments corresponding in number and arrangement to the sections of the grate, and means within each of said compartments of the ash chamber for moving the plates of the adjacent grate-sectiOns "to operative position after they have been dumped.

6. in a furnace, the combination of a revolving sectional grate, each section including two plates adapted to movc about a cons men axis, means for detachably holding said plates in horizontal position, and means movable 1n opposite directions about the axis of the plates for restoringlhc said plates successively to operative position after they have been dumped.

7. in a furnace, the combination of a revolving sectional grate, each swtion-comprisinga plurality of indepeiidently-swinging plates, and a rock shaft adjacent each scc tion of the era to and provided with. means for restoring the plates of said section to operative position after they have been dumped.

S. In a fiu'nace, the combination with a sectional grate, of a support for the grate having therein a series of ash-chambers, corresponding in number and arranged below the sections of said grate, and means for revolvi ng said grate-support.

in testimony whereof I have signed my name to this speclhcation 1n the presence of two subscribing witnesses.

EM ltO HARCHARICK.v

. Witnesses;

W. L. RAEDER, ANDREW l'lOURIGAN.

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