US2148121A - Arch supporting siphon - Google Patents

Description

Feb. 21, y1939. c. G, HAWLEY ARCH SUPPORTING SIPHON 2 Sheets-Sheet 1` Filed Apm 12, 1957 @M f WMM? @mags 4 Feb. 21, 1939, c. G. HAWLEY ARCH SUPPORTING SIPHON 2 shee1s-shee1f 2 Filed April 12, 1937 3mm/vtm Chares Haurley.

Patented Feb. 21, 1939 ITE-o Asrm,Es

PATE-Nr oli-FICE ARCHSUR-PORTINGISIPHON' Charles -GilbertHawley, Chicago, 111.,.assignor, by mesne, assignments, ,to Downflow Syphon Com- .K pany, Cleveland, Oliioa corporation of Ohio;

. `Application,April 12, 193.7.;.SerialzNoa136,488*- This-invention relates to` improvements in r and for the water-steaming-and-circulating siphons thatoccupylongitudina1,i` vertical positions in locomotive reboxes and which are called upon to support wholly or in part the refractory brick that compose a nre-box arch. The invention has further and special reference to siphons of the U-shaped downow type described and claimed in my allowed application S. N. 82,953.

The invention consists first, in a thermic siphon of U-shaped cross-section and specially formed to aid in the distribution of water within the siphon and to support arch brick upon the exterior of the siphon. And, second, the invention consists in arch brick of special formation, complementary to the described special thermic siphon.

The invention will be readily understood upon reference to the accompanying drawings, which form parts of this specication, and in which:

Fig. 1 is a vertical, longitudinal section of a locomotive boiler and rebox constructed and equipped in accordance with this invention; Fig. 2 is a vertical cross-section on the line 2 2 of Fig.

l; Fig. 3 is an enlarged cross-sectional detail taken from one of the siphons of Fig- 2, and better illustrating the present invention.

The construction of the exemplary boiler and rebox exhibited here is too well known to require extensive description.

'I'he firebox 2 is of the internal, stayed type common to locomotive boilers. Its fuel door is marked 3 and the fuel bed or re is marked 4. 'Ihe gases rise within the box and sweep forward, departing through the flues 5. The thermic siphons, so-called, are marked 6, two being shown. The siphons here exhibited and to which the present invention particularly appertains, are f the downow type that take water from the 40 rear water leg l of the boiler and deliver water and steam through the crown sheet 8 and into the steam space S.

These downiiow siphons are described and claimed in my said application S. N. 82,953, and

areL more speciiically described and claimed in my companion application entitled Downiiow siphons, of even date herewith.

Such siphons are thin hollow water walls that divide the upper part of the fire chamber 2 into several parts; and, to increase the flame travel from fuel bed to flues it is common to equip the rebox with an inclined refractory baille, called an arch. The name travel is shown by arrows in Fig. 1.

The present invention is concerned with a specifically. novel construction and support for that` arch: the arch` in.` association with; the siphons being:broadly-claimedfinzsaid `companion application entitled Downlow siphons.

First to be noted is a cross wall 9, which is lodged within the combustion chamber portion I0 of the firebox. That wall has vertical notches which accommodate the lower, forward parts of the siphons 6. The arch proper extends upwardly and rearwardly from the wall 9 and is composed 10 of specially shaped brick Il which extendcross- Wise of the rebox, from siphon to Siphon, and from siphons to rebox side sheets; all nding special supports upon said siphons. Those supports are provided by grooved portions 6 of the 15 siphons, into which the ends of the brick Il fit, as well shown in Fig. 2 and as fully detailed in Fig. 3.

All brick used in making up the wall I0 and the arch proper are of sizes which permit them to be carried into the iirebox through the fuel door 3.

Referring to Fig. 3, it will be seen that the hollow wall or siphon is composed of spaced apart side sheets 6a, which are joined by many short staybolts I2. At the bottom the sheets are joined in the U-shaped section 6b; which forms the closed bottom of the wall or siphon. At that point the sheets 6a are united by a fusion weld 6c. The rear end 6a of each Siphon is similarly made. If desired, the entire siphon can be made by folding a single sheet, thereby avoiding the bottom weld 6c, but it is more convenient to make the siphon as here shown.

The upper parts of the sheets Ga, and end portions are flared out to form the flanged top, 6d. As is common the flaring top of the siphon is united with the crown sheet 8 by butt welds 8a. The whole crown sheet is supported by crown bolts I3 and certain thereof are fastened in the flanges 6d of the Siphon, to more securely support that 40 part with and from the crown sheet.

Special novelty attaches to the grooves E', which are here provided in the side sheets 6a; and also resides in the restricted longitudinal siphon throat 6x, which is formed by the inwardly ex- 45 tended or grooved parts G. Most conveniently, the grooves 6' areformed by pressing or stamping the sheets before they are formed into the Siphon body, and those grooves extend longitudinauy of the Siphon s, parauei with the bottom of 5 thesiphon, as well shown in Fig. 1.

The inclined portion of the brick arch extends only part Way toward the rear end of the siphons and the grooves 6 need not be longer than the u arch, though it is admissible to extend the grooves from end to end of the siphon.

Obviously, the lower sides of the grooved por tions 6' provide shoulders upon which the ends of the brick II may rest; and hereunder each brick I I is provided with a complementary end rib IIa, preferably extending from end to end of the brick.

The brick II occupy inclined transverse positions, as well shown in Fig. 2 and are assembled as there shown. By preference, the free ends of the brick are provided with interlocking parts IIb, to prevent disengagement after the brick are assembled as shown.

As explained, the water enters each siphon through its rear end, passing downward along the bottom 6a thereof. During operation water is evaporated very rapidly within the Siphon and it is a distinct advantage that the lower part of the siphon is converted into a water conduit leading to the lower corner of the siphon; and, that the constricted longitudinal throat 6x controls the rise of water and steam from the lower part of the siphon, thus ensuring a good distribution of both throughout the siphon.

Attention is called to the fact that if the Siphon is to be made with a longitudinal bottom Weld 6c as shown in Fig. 3, it would be better to dispense with the threaded and headed staybolts I2 herein shown and to substitute therefor welded stays, after the manner set `forth and claimed in my companion application of this date, entitled Thermic siphons and the like.

I claim:

l. A locomotive rebox siphon comprising a longitudinal water wall having a brick supporting recess or groove formed in its side.

2. The structure as claimed in claim 1, in combination with refractory brick having end ribs, complementary to said groove.

3. The structure as claimed in claim 1 and having one such groove in each of its sides, said grooves being opposite and thus presenting a constricted internal throat, as and for the purpose specified.

CHARLES GILBERT HAWLEY.

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