US2075222A - Boiler - Google Patents

Description

v H. H. PEEK, SR

BOILER March 30, 1937.

2 sheets-shea 1 Filed May 13, 1936 -QQQQ March 30, 1937.

H. H. PEEK, SR

BOILER 2 Sheets-Sheet 2 Filed May 13, 1956 e @V217/ 15%?. l

Patented Mar. 30, 1937 UNITED STATES eATENT OFFICE BOILER Horace H. Peek, Sr., Chattanooga, Tenn.

Application May 13, 1936, Serial No. 79,520

9 Claims. l (Cl. 122-369) This invention relates to improvements in boilers, and has special reference to an improved mud ring construction for such boilers.

Boilers which have enclosed re boxes have what are termed water legs which form the walls of the re box.

This present invention relates particularly to the means for closing the bottom of such water leg spaces and particularly to the production of boilers for what is termed high pressure.

I have found that where the mud ring is the usual heavy or thick ring and is secured by stay bolts which project through the ring and bind the outer and inner walls of the water legs to the mud ring, it frequently happens that mud settles on the mud ring with the result that the water is held away from this part of the boiler.

This condition is quite detrimental as it frequently results in the boiler plates being burned out and causing expensive repairs.

By means of my invention I am enabled to avoid such undesired conditions.

The object of my invention is to provide a mud ring construction which shall be amply strong for use in high pressure boilers, in which the lower ends of the water legs will be closed by a plate of minimum thickness, wherein the walls of the Y water legs shall be held together with ordinary stay bolts, and which stay bolts and the closing plate shall be protected against the settling of mud, by means of a guard ring or plate arranged immediately above the lower row of stay bolts and preferably out of contact therewith, at least to such an extent as to permit the water of the boiler to contact such parts and protect them from over-heating.

For the accomplishment of the above mentioned andlother advantages, the invention consists of the features of construction and combinations of devices and parts as portrayed in the accompanying drawings, forming part of this specification, as described in the following specification and as specifically set out in the appended claims. It should be understood, however, that the disclosure herein made is typical merely of many constructions which might be devised to accomplish the desired ends.

In said drawings:

Figure 1 is a transverse, vertical section of a boiler equipped with a mud ring construction embodying my invention;

Fig. 2 is a horizontal section on the line 2--2 of Fig. 1; Y

Fig. 3 is an enlarged fragmentary side elevation, partly broken away, of a portion of the lower part of a water leg;

Fig. 4 is a fragmentary vertical section on the line 4-4 of Fig. 3.

Fig. 5 is a fragmentary, longitudinal, vertical" section on the line 5--5 of Fig. 4; and v Fig. 6 is a fragmentary, horizontal section on the line 6-6 of Fig. 4.

The boiler I0, shown in the drawings, is of the internal combustion chamber type and has an outer inverted U-shaped wrapper sheet Il and preferably an inner Mshaped fire-box sheet I2.

The combustion space I3 is defined by the en-` closing walls of the inner fire-box sheet which has vertical side walls I4, inner end Walls I5 and a suitable crown sheet I6.

The outer wrapper sheet Il has vertical side walls I1 and vertical end walls I8, and the Water legs are the vertical portions of the boiler formed by the inner and outer vertical walls. As is usual, these walls are spaced apart in substantially parallel relation and are rigidly held in such relation by suitable stay bolts I9.

The present invention relates especially to the protection of the lower ends of the water legs against burning of the plates.

As shown in the drawings, I connect the lower edges of the inner and outer walls of the boiler by a flat sheet-metal ring or member 20, preferably welding the edges of this member to the inner It is one object of my invention to provide al construction which will, to a considerable extent, at least, prevent the mud from settling down into the spaces between and around these stay bolts 22.

For this purpose I provide a guard ring 23 of sheet metal which is similar in shape to the closing ring 20 and I arrange this guard ring in horizontal position and slightly above or out of contact with the stay bolts, as shown at 24. This guard ring is supported by sheet metal brackets 25.

The brackets 25, as shown, are triangular in shape and are secured at one end to the inside wall I4 and project toward the outer wall I1.

The upper edges 26 of the brackets are horizontal and define a plane parallel to the closing ring 20, and the guard ring 23 is supported on Y these top edges.

The narrow ends 21 of the brackets 25 are secured to the inside wall i4, preferably by welding, as indicated at 28, and the guard ring is preferably secured in place on the tops'of the brackets 25 by welding as indicated aty 29.

V The guard ring 23 is made slightly narrower than the width of the water leg space so that the side edges are free of the inner and outerwalls of the water leg, providing open spaces 30 Y It is to be'noted that the stay bolts 22 are 15 positioned free of the closing ring 20 so that the boiler water may completely surround the stay bolts and circulate between these stay bolts and the closing plate. j

In constructing a boiler of this kind, I pref- 20 erably apply the brackets to the inner fire box sheet before the inner re-box sheet and outer fire-box sheet are assembledv together, andfurtherthe guard. ring is assembled with brackets before the outer wrapper sheet is placed over the inner'wrapper sheet. This method of procedure makes it very easy to `produce the improved structure described. l f

As many modicationsof the invention will readily suggest,v themselves to one skilled in the art, I doA not limit or corinnev the invention to the specific structures herein shown and described except within the scope of the appended claims.

I claimzi 1. The combination with a boiler of the internal fire-box type having ywater legs surrounding the fire box and a horizontal series of stay bolts adjacent to the bottom of the water legs, of a substantially horizontal guard ring above said` stay bolts,

2. The invention as defined in claim 1, the guard ringV being lnarrower than the width'of the water legs and arranged to provide spaces at its edges for the passage of water.

3. The invention as dened in claim 1, means supporting the guardring free of the stay bolts to permit the free circulation of water between the guard ring and the'stay bolts.

4. The invention as defined in claim 1, and means supporting the guardring free of the stayk bolts, water circulating passages being provided at the inner and outer edges of the guard ring;

5.*The invention ask defined in claim 1, and bracket members secured to one of the side Walls and supporting the guard ring free of the stay bolts.

e. The invention as `defined in @1am 1K, and

brackets secured to the inner walls of the waterv legs and supporting the'guard Vring independent of the stay bolts. i 7. The Vinvention as defined in claim 1 and tapered brackets secured toV one of the side walls of the water legs, the guard ring secured to Said brackets, andl spaces provided for the passage of water at theedges of the guard ring.`

8. The invention as defined in claim` 1,V and Y brackets welded to theY inner walls" of the waterV legs and projecting toward the other Walls and the guard ring arranged in horizontal position above the stay bolts and welded to said brackets.` 9. The invention as defined in claim 1, andiv means supporting the guard ring free of theV outer Walls of the water legs and also free of the stay bolts.

HORACE H. PEEK, SR.

CERTFCATE OF CGRBEGTO` HORACE L. PEEK,

'thai error appears in the pin'iye ent requng correction as fell fire-bex" Tee@ wife,

13S-3" meen the; and that the Sal. eomreeiions therein that the same may eenom the in the Patent Office.

'this 31st dey of August, A. D.

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