US2211270A - Grate - Google Patents

Description

Aug' 13, 1940 N. JAMES ET AL 2,211,270

GRATE Filed Feb. 8, 1939 Patented Aug. 13, 1940 UNITED srg'ras GRATE Norman James and Joseph J. Zurenda, Jr., Edwardsville, Pa.

Application February 8, 1939, Serial No. 255,336

l Claim.

This invention relates to grates, and hasI for one of its objects the production of a simple and eicient grate for furnace boilers and the like, wherein means are provided for circulating Water through the grate, to increase the life of the grate and to reduce the danger of the grate becoming burned out, to a minimum.

A further object of this invention is the production of a simple and emcient furnace grate, the parts of which may be readily assembled and thoroughly braced to provide a sturdy and unitary structure.

Other objects and advantages of the present invention will appear throughout the following specication and claim.

In the drawing:

Figure 1 is a top plan view of the grate;

Figure 2 is a transverse sectional view taken on line 2 2 of Figure 1 Figure 3 is a longitudinal sectional View taken on line 3-3 of Figure l;

Figure 4 is a perspective View of one end of one of the grate bars;

Figures 5, 6, 7 and 8, are transverse sectional viewsI illustrating different design types of grate bars.

By referring to the drawing, it will be seen that the grate comprises a pair of headers or boxlike members I which are arranged in spaced relation. These headers or box-like end mem- 4bers carry the grate bars II which are arranged in between the headers or box-like members Ill, as shown in Figure '1. 'I'he grate bars II are preferably triangular in shape in cross-section, having their flat upper surfaces I2 extending in a horizontal plane and arranged in flush relation with respect to the top face of the headers or box-like members I0, as shown in Figure 3. Each grate bar II is provided preferably at the ends thereof with an extending collar I3 triangular in formation and these collars of the grate bars I I t in suitable openings formed in the inner faces of the headers I0 and are preferably Welded to provide a unitary structure. Because 0f the shape of the connection joint twisting of the grate bars I I with respect to the headers will be resisted. Each header I0 is provided with an outer sealing plate I4 and the outer side of each header is left open while assembling the device, until the ends of the grate bars II are welded to the headers I0. The plates I4 are then welded in the position shown in Figure 3. One of the headers I0 is provided with a plurality of inlet pipes I5 and the other header I0 is provided with an outlet pipe IB. The grate bars II are inserted slightly above the lower face of the headers Il), as shown in Figure 3.

The inlet pipes I5 are preferably connected to the bottom of the boiler and the outlet pipe I 6 is preferably connected to the top of the boiler 5 to provide a proper circulation through the grate and the boiler.

I'hese grate bars I II are preferably braced transversely by means of the transversely extending spacing strips Il which are welded or other- 10 upper facesI of the bars so as to prevent the fuel from clogging between the bars. These bars I I are preferably braced from below by means of a plurality of transversely extending supporting members I8 which extend under the bars, as

shown in Figure 2, and rest upon suitable side rods or members I 9 which fit against the side Walls of the furnace 20. These rods or members I 9 are also braced and supported by means of the transversely extending strips 2l which pass through the side walls of the furnace in the manner as shown in Figure 2. The bars I8, I9 and 2l may be suitably spaced and increased or decreased in number as occasion may demand. The grate is preferably mounted in the conventional manner so that the rear end is slightly elevated with respect to the front end of the grate facilitating circulation of the Water as well as facilitating the removal of the ashes etc., by pulling in the conventional manner.

In Figures 5, 6, 7 and 8 I have illustrated four 35 modied types of grate bar designs, wherein the grate bar may be modified as to its particular design without departing from the spirit of the invention.

It should be understood that the present type of grate will provide a maximum surface which is acted upon by the water passing through and circulating through the grate and that the mounting and assembling of the grate bars With respect to the headers I0 will provide a very economical 45 and efcient arrangement for the construction of a grate, whereby water may circulate freely through the headers asI well as through the grate bars which communicate at their respective ends with the headers. The grate bars although being holloW to provide for this circulation between the headers are at the same time thoroughly braced and supported in a manner to prevent the grate from sagging and breaking.

'Ihe grate is adapted to be supported Within the 55 will become preheated before passing to the ccn- Ventional boiler to which the outlet pipe lG may pass in the usual manner.

Having described the invention, what is claimed is:

A grate of the class described comprising a pair of hollow end members having at upper faces,

Water inlet means for one end n1 .mber, Water outlet means for the other end member, hollow grate barsv triangular' in cross-section communicating with the end members and. extending between the end members and arranged in. spaced relation with respect to each other, d grate bars having their upper faces extending in a horizontal piane and flush with the upper faces ci the end members, each grate bar lig-'ing a reduced. collar at its or" triangular fern dion, "Je end nieznbei@ having apertures of tria guiar ation to et lein of the li respect to the end members, the collars NORMAN JAMES. JOSEPH J. 7UPLENDA, JR.

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