US1922516A

US1922516A - Furnace construction

Info

Publication number: US1922516A
Application number: US471165A
Authority: US
Inventors: John E Anderson
Original assignee: Plibrico Co LLC
Current assignee: Plibrico Co LLC
Priority date: 1930-07-28
Filing date: 1930-07-28
Publication date: 1933-08-15
Anticipated expiration: 1950-08-15

Description

1933- J. E. ANDERSON FURNACE CONSTRUCTION Filed July 28, 1930 2 Sheets-Sheet 1 MQ M- Aug. 15, 1933- J. E. ANDERSON 1,922,516

FURNACE CONSTRUCTION Filed July 28, 1930 2 Sheets-Sheet 2 r J L U -.W L L L Patented Aug. 15 1933 FURNACE CONSTRUCTION John E. Anderson, Chicago, Ill., 'assignor toi Plibrico Jointless Firebrick Company, Chicago, 111., a Corporation of Illinois I Application July 28,1930. Serial No. 471,165'

11 Claims. (c1. 72 -101) This invention relates to furnace constructions and more particularly to means for anchoringa lining t'oa furnace wall.

This anchoring means is intended to be used in connection with a refractorylining applied to furnaces, such lining being initially formed of a plastic material. While the anchoring means is intended particularly for this use,it can, of course, be used for many other purposes, as will be readily understood. In applycondition, it is necessary to provide anchoring means for securing the lining, as it is formed, to thefurnace wall. It is also necessary that the anchoring means be flexible to the extent that it will allow relativemovement of the lining under conditions ofuse, both horizontally and. vertically and independently of the retaining wall, so as to avoid subjecting the lining and the wall to undesirable stresses and resulting injury. 1 t

In thecopending, application of Ivon S. Piet ers Serial No. 123,825, filed July 21, 1926, for

Flexible anchors," there is disclosed ananchor for, use with a furnace of brick setting and to a certain extent, the refractory lining of the furnace chamber from the outerretaining wall.

"It is one of the features of my invention that the anchor can be secured directly to the easins by bolting or welding itthereto. This is a decided advantage in a furnace of hollow wall construction inasmuch as the anchor can be secured directly to the backing ofthe refrac tory material, which is'of some heat resisting material, instead of having to pass therethrough ,an'dbeconnected to the outer retaining wall.

Another important feature of the'invention is the, provision of means'for fastening such an chors tola furnace of hollow wallconstruction and-of such form as will limit the .movement of the refractory wall toward and awayfro'm the retaining wall and thus eliminate'the use of headers for; such a purpose.

Other objects and advantages'of the invem "non willbe apparent from the following detailed descriptionwhen-taken inconnection with th accompanying drawings in which: r

Figural is" atop plan viewof the anchor of my invention as used with a furnace 6f hollow Wall construction;

Figure 2 is a fragmentary sectional view of the anchor taken along the line 2-2 of Figure 1;

Figure 3 is an elevational View of the anchor as used with a steel casing wall;

Figure 4 is a vertical sectional View through a furnace wall and lining, of hollow construction, showing the application of the invention to such aconstruction; and mg a refractory lining to furnaces in plastic Figure 5 is a section takensubstantially along the line 5-5 of Figure 4.

Referring more in detail to the drawings: As best seen in Figure 4, I have shown my invention as applied to a furnace of hollow wall construction. The outer or retaining wall of the furnace setting comprises an outer casing 1 of steel or sheet metal against the inner side of which abuts a Wall 2 of heatresisting material,

such as asbestos or magnesium." A suitable .4 is formed of refractory material which, when applied, is in a stiff plastic condition, this material being applied in lumps or chunks which are beaten together .by a suitable mallet to form a monolithic structure, and the. backing 3 provides a retaining form orsupport against which the wall is formed.

The flexible. anchor, assembly for anchoring the lining wall 4 to the retaining walll is designated in its entirety by the reference numeral 6 and comprises three

members

7, 8 and 9. The

member 8 comprises'a single strip of strap metal bent intermediate its end into. the shape of a reverse or 'ogee curve, to form two

arms

10 and 11, the purpose of which will be hereinafter explained. Anchorapart 7 comprises a base 12 having a relatively long upturned arm 13 and a relatively short upturned arm 14. A slot 15,

(Figures 1 and 2) of sufficient width to accommodate easily the arm 10 of member 8, is formed in base.12 adjacent arm 10 as by stamping out a lip 16 from the base. Further details of this anchors member may be found in the above mentioned copending application. In applying the member 7 to member 8, it is simply slipped over the arm 10 which extends upwardly through the slot 15. Due to the slot being of greater Width than the arm 10, asillustrated in Figure 1, the anchors will permit independent expansionandf contraction of the innerfiwall 4 in all directions in the plane thereof due to the relative vertical and transverse movement between the arm and the member 7.

The anchors are fastened to the retaining wall or casing I by means of anchor part 9 which comprises a rod of circular cross section. The rod 9 is threaded for a small portion of its length at either end for the reception of

nuts

17 and 18, and near one of its ends is bowed to form a portion 19 of substantially u shaped configuration. It will be noted that the bowing of rod 9 forms in effect two

flanges

20 and 21,

of which flange 20 is adapted to extend through the backing 3 for the reception of. member 8 which is secured thereon by means of the nut 17. It will also be noted that when the member 8 is mounted upon said rod, the arm 11 of member 8 abuts the backing 3 and that the reverse or ogee curvature of said member is sufficient to allow the anchor part 7 to play freely both horizontally and vertically on arm '10 without binding. The U-shaped portion 19 of the rod 9 abuts against the outer side of backing 3 and the innerside of the wall 2, with the flange 21- thereof extending through said wall and the outer casing 1, and a channel frame member 30, to which it is secured by the nut 18. By reason of the Ushaped portion of the rod abutting against the wall 2 and the backing 3, the walls are thus held in spaced relation to preserve the air space 5 and the use of headers, which are usually used for such a purpose, is thus eliminated.

In Figures 1 and 2, I have shown a modification in the manner of mounting the anchors upon the wall. In cases of hollow wall construce tion where it is not desired to use the member 9 for securing the anchor to the retaining wall, the anchors may be secured directly to the back- 3 by means of a nut and

bolt

22 and 23 respectively, which passes through the backing and the arm 11 of member 8. In such a construction it will, of course, be necessary to provide some means for spacing the backing 3 from the retaining wall orwall of insulation 2, all as is well understood in the art. The construction of the

members

7 and 8 is the same as that referred to in Figure 4 and a further description of them is not deemed necessary.

In Figure 3, I have shown the anchor as applied to a furnace having a metal casing 1a and a wall of insulation 2a. The member 8a, which has the same function as themem'ber 8, is of substantially z shaped configuration. The arm 11a, of member 8a, is secured to the casing 1a in any suitable mannensuch as by welding or bolting it thereto. The reverse or ogee curvature of such member is sufilcient to extend through the wall of insulation 2a so that the anchor member 7 may be mounted upon the arm 10a for free translatory movement in both a horizontal and a vertical direction.

In practice a number of lining anchors comprising the member. 8 are employed, being spaced at suitable distance apart and fastened to the outer casing of the furnace or to the backing or support of the monolithic material, as the case may be. The wall dis then built up to the member 3. The member '7 is then connected to the member Send the plastic material then pounded around said anchon Any suitable means may provided to prevent the plastic material from entering slot .15 and interfering with the operation of the anchorafter the wall has become set and vitrified. Such a means is disclosedfor example, in the copending application of Roger F. Wiley, Serial No. 475,147, filed August 14, 1930, for Lining anchoring means. It is, however, to be understood that any other suitable means, such as the placing of moistened paper or asbestos about the point between the anchor members, may be employed. The important object is to assure that the connection between the lining anchoring member and the wall anchor member is such that the lining is freeto expand and contract both vertically and horizontally after it has become set and vitrified, and independently of t e'retaining Wall. The wall 4 is separated into sections by means of the Corbel construction Figure 4, which is supported by ula,

means of angle strips 33 and 34 bolted or otherwise suitablysecured to frame member 36. Such a construction serves to transmit the weight of thelining to the channel members 30 and thus prevents the weight of the lining itself from causing buckling and resultant breaking away and spelling ofthe wall. The refractory lining a is disposed below the boiler tubes 31, where the heat is most intense. The upper lining ea may be of fire brick or other suitable refractory material, as the heat is not as intense above the tubes 31, as below these tubes. After the wall 4 has been erected in the manner described, it is suitably dried and vitrified and the furnace is then in condition for use.

What I claim is:

1. In. a furnace construction, an outer rotaining wall, an inner wall disposed in spaced relation to said outer wall comprising a lining of refractory material anda backing therefor, anchor members embedded in said lining, and means securing said members to said backing and said outer wall.

2. In a furnace construction, an outer retaining wall, an inner wall comprising a lining of refractory material and a backing "therefor,

anchor members for securing said lining to said backing, and means for securing said anchor members to said backing 'and'for holding said inner wall in spaced relation to said outer wall.

3. In a furnace construction, an outer retaining wall, an inner wallincluding a lining of refractory material, spacing members extending from the outer wall and disposed in abutting relation to said inner and outer walls for holding said inner wall in spaced relation to said outer wall, and means mounted upon the inner portion of said spacing members for accommodating expansion and contraction of said inner wall in every direction in the plane thereof in dependently of the outer wall. V

4. In a furnace construction, an outer retaining wall, an inner wall including" alinin'giof refractory material, means for holdingtsaid inner wall in spaced relation to said outer wall and against movement away therefrom, and

slon and contraction saidrlining in every direction in the plane thereof independently of the backing and said outer wall.

6. In a furnace construction, an outer retaining wall, an inner wall disposed in spaced relation to said outer wall and comprising a lining of refractory material and a backing therefor, and a flexible anchor connecting said lining directly to said backing, said anchor permitting said lining to expand and contract in every direction in the plane thereof independently of said support and said outer wall.

7. In a furnace construction, an outer retaining wall, an inner wall disposed in spaced relation to saidouter wall and comprising a .lining of refractory material and a backing therefor, anchor members embedded in the lining wall, and anchor members secured to said backing and having universal connection with the lining wall anchor members, whereby the lining wall is free torexpand and contract in every direction in the plane thereof independently of said support and said outer wall.

8. In a furnace construction, an outer retaining wall, an inner wall disposed in spaced relation to said outer wall and comprising a lining of refractory material and a backing therefor, anchor members embedded in the lining wall, anchor members secured to said backing, and tongue and slot connections between the anchor members permitting expansion and contraction of the inner wall in every direction in the plane thereof independently of said backing and said outer wall.

9. In a furnace construction, an outer retaining wall, an inner Wall comprising a backing and a refractory lining, an anchor member secured to said lining, an anchor member on the backing and having universal connection to the lining anchor member, and means securing the anchor member on the backing to said backing,

said means acting to hold the inner wall spaced away from the outer wall and also securing the inner wall and the outer wall together.

10. In a furnace construction, an outer retaining wall, an inner wall disposed in spaced relation to said outer wall and comprising a lining of refractory material and a backing there.- for, an abutment member extending from the outer -wall and having a U-shapedportion disposed in abutting relation to said outer wall and said backing for holding said backing spaced from said outer wall, and means carried by said abutment member for securing said lining to said backing and for holding said lining against movement away from said backing, said means accommodating expansion and contraction of the lining in every direction in the plane thereof independently of the backing and said outer wall.

11. In a furnace construction, an outer retaining wall, an inner wall disposed in spaced relation to said outer wall and comprising a lining of refractory material and a backing therefor, spacing members extending from the outer wall and disposed in abutting relation to said outer wall and said backing for holding said' backing spaced from said outer wall, and means carried by said spacing members for securing said lining to said backing and for holding said lining against movement away from said backing, said means accommodating expansion and contraction of the lining in every direction in the plane thereof independently'of the backing and said outer wall.

JOHN E. ANDERSON.