US1540889A - Furnace arch - Google Patents

Description

G. A. KOHOUT FURNACE ARCH June 9, 1925.

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1,540,889 G. A. KOHOUT FURNACE ARCH Filed June 26, 1922 5 Sheets-Sheet 5 f 6 :v W 6% Patented June 9, 1925.

UNITED STATES.

GEORGE A. KOHOUT, OF CHICAGO, ILLINOIS.

FURNACE ARCH.

. Application filed June 26, 1922. Serial No. 571,060.

To all whom it may concern:

Be it known that I, Gnonon A. KoHoU'r, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois. have invented a certain new and useful Improvement in Furnace Arches. of which the following is a full, clear, concise and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to furnace arches, and more particularly to a simplified construction of what is known as a flat arch.

It is a purpose of the invention to provide an arch construction which comprises blocks of'refractory material and a support therefor, which support is preferably of metal. The arch referred to may be at any desired location in the furnace, either at the forward end of the fire box, or at the rear of the boiler, or in any other desired position. Such arches are ordinarlysupported by means of I-beams,-or, channel members,

or any otherstructural steel members, which are mounted in the brick work of the furnace. The supporting members for the refractory blocks are mounted on these I- beams. or channel members. and in order to provide a strong structure and to provide the desired space between the I-beams or structural steel members. the supporting members are usually supplemented'by spac-' ing members to properly hold the I-beams in proper, spaced relationship and said supporting members are clamped or secured in some other way to the flanges of the I- beams or between flanges of adjacent I- beams or channels.

It is a purpose of the invention to provide an arch having supporting members for the refractory material which not only support said refractory blocks, but also space the I- beams and hold them in properly spaced relationship. Said supporting members are preferably made up of a pair of longitudinally extending sections which are securedtogether sonas to interlock with the I-beams and to space said I-beams properly relative to each other.

It is a further purpose of the invention to provide a structure of the above mentioned character which makes it unnecessary to provide additional or separate spacers between the I-beams. and which makes it unneces-' sary to drill or in any other way fabricate the structural members so as to secure the parts of the device thereto and which is easy to repair due to the fact that it is easy to assemble and easy to take down.

It is still a further purpose of the invention to provide a device of the above mentioned character which permits of expansion due to the changes in temperature in the furnace, and which is provided with a suitable expansion joint when the length of the supporting member is such as to make such a connection necessary.

It is alsoa purpose of the invention to provide means for supporting certain of the blocks of refractory material at a lower level than the remainder of said blocks, said means preferably being in the form of a downward extension on said support.

Other ob 'ects and advantages of the invention will appear as the description of the accompanying drawings proceeds. However, I desire to have it distinctly understood that I do not intend to limit myself to the exact details shown or described but Fig. 4 is a front elevation of a furnace.

showing my improved arch construction applied thereto;

Fig. 5 is a view in longitudinal section of the rear portion of a furnace, said section being taken immediately inside the side wall of the furnace.

Fig. 6 is a viewrsimilar to Fig. 5 of a different form of archshowing my invention applied thereto;

Fig. 7 is a view similar to Fig. 6 showing a slightly modified form of supporting member to be used with a longer arch;

Fig. 8 is a fragmentary front elevation of a modified form of archconstruction;

Fig. 9 is a longitudinal section thereof;

Fig. 10 is a section taken on the line 10-10 of Fig. 6;

Fig. 11 is a section taken on the line 1111.of Fig. 6;

Fig. 12 is a fragmentary perspective view showing the expanslon oint used in the form of the invention shown in Fig. 7;

Fig. 13 is a perspective view showing the members used in forming the expansion joint separated;

Fig. 14 is a fragmentary perspectlvevlew of the supporting member at the left of Fig. 7 having an extension thereon for hanging certain of the refractory blocks in a lower position than the major portion of the arch; and

Fig. 15 is a similar view of the supporting member at the right of Fig. 7 in wh ch a hanger is applied thereto so as to provide an extension thereon.

Referring in detail to the drawings, it will be seen upon reference to Figs. 4, and that my improved arch structure is applied to a furnace having the side walls and that said arch may be applied at the forward end portion of the furnace, as shown in Figs. 6 and 7, or at the rear of the furnace, providing what is known as a rear arch adjacent the rear wall 21 of the furnace, as shown in Fig?" 5. In any ap plication of the arch the blocks of refractory material comprising the arch proper are supported from I-beams 22 by means of the supporting members made of complementary members 23 and 24. The pairs of members 23 and 24 are supported from the lower flanges 25 of the I-beams 22. The member 23 comprises a web portion 26, a lower laterally extending flange portion 27 and an upper laterally extending flange portion 28, which is of considerably greater width than the flange 27 but extends only part of the distance from end to end of the member 23, thus forming a ledge at one end of the supporting member or hanger 23. The web portion 26 is provided with upwardly extending portions 29 and 30 respectively, which are undercut, as shown at 31 and 32 respectively, so as to provide a pair of hooks which are adapted to he slipped over the flanges 25 of the I-beams 22, as

clearly shown in' Fig. 1. The member 24 is provided with a web 26' corresponding to the web 26 and with a flange 27' correspond mg to the flange 27 of the member 23, the flange 27 being turned in an opposite direction to the flange 27. The member 24 is also provided with a wide short flange portion 28 corresponding to the flange 28 and with hook- like extensions 33 and 34 which engage with the flanges 25 of the I-beams 22 opposite the flan es 25 in ,a manner similar to that in which the hook-like inembers 29 and 30 engage with the flanges 25.

It will be noted that the hook- like members 33 and 34 extend in the direction opposite to the members 29 and 30 and that the member 23 is provided with an openmg 35 and the member 24 is provided with a boss 36 and opening 37 therein. In use the supporting device is applied to the I-beams in the manner shown in Fig. 1. The

I-beams are spaced so that the hook- like members 29 and 30 and 33 and 34 are adapted to engage with the oppositely directed flanges of the I-beams and the opening 35 will be opposite the opening 37 so that a bolt 38 may be passed through said openings with the head 39 engaging with the boss 36. With the parts in the position shown in Fig. 1 and with the bolt provided through the aligning openings, the supporting device will be firmly secured to the I-beams and the structure will take care of expansion and contraction due to changes in temperature because of the fact that the hook-like members engage loosely with the flanges 25 and 25, and the ends of said hooks are spaced from the webs of the I-beams 22, thus permitting of movement of the hooklike members relative tothe I-beams, said members not being positively connected in any manner to the I-beams or other structural members. As will be clear from Figs. 10 and 11, suitable blocks of refractory material are mounted on the supporting members made up of the pairs of sections 23 and 24, said blocks being designated in Figs. 10 and 11 by the numeral 40, and as will be clear from Fig. 10 each of said blocks is provided with a groove or channel therein that has a reduced entrance portion 41 and an enlarged portion 42 inwardly thereof to provide an inverted T-shaped slot in each of said blocks 40.

It will be seen upon reference 'to Figs. 1 to 3 inclusive that when the members 23 and 24 are brought together the flanges 27 and 27 together with the web portions 26 and 26 will form a member T-shaped in cross section, which is adapted to fit loosely within the groove formed by the passages 41 and 42, thus the blocks can be slipped endwise onto the supporting members, said supporting members being mounted on the I-beams 22 in proper spaced relationship so that the adjoining blocks'40 will fit closely together.

It will be seen from Fig. 11 that the I-beams 22 are held in properly spaced relationship by means of the supporting members comprising the portions 23 and 24 due to the fact that when the halves of the supporting members are assembled together,

portions thereof will be interposed between the webs of the I-beams, the same being only spaced sufficiently from the webs of the I-beams to allow for expansion.

It will also be seen that due to the arrangement set forth, it will be unnecessary to provide any other devices than those described for securing the supporting members for the refractory blocks in position on the structural members, and that no drilling or other work on the I-beams is necessary in order to secure the supports for the arch thereto. Any style of block of refractory material may be secured to the sup porting members by slipping the same thereon. In Figs. and 11 the refractory blocks or tiles are shown as being all of r the same size transversely of the arch. It

.from the end at the 6 and is then moved is sometimes desirable to provide certain tiles or blocks which extend with their lower edge further down below the supports than thelower edges of the other tiles or blocks, and in the construction shown in Figs. 10 and 11. this arrangement has been adhered to, the details of the construction being more clearly shown in Figs. 1 and 6. I

The blocks 40 shown in Fig. 10 are the blocks or tiles located 'at the forward end of the-arch when the same is applied to a furnace in the front thereof, and these blocks have their lower edges extending further down than the blocks further in toward the inside of the furnace, as will be clear from Figs. 1 and 6. The blocks may be of any size or shape. as long-as they are' provided with the channels or grooves therein that are adapted to receive the supporting members. In Figs. 1 and 6 the blocks 43 adjacent the blocks 40 are shorter and thinner than the blocks40, while the blocks or tiles 44 adjacent the blocks or tiles 43 are of the same height but of greater depth than the tiles 43, the sizes being varied so as to obtain the desired shape for the arch, and the desired length for the same. Theend blocks are somewhat different from the blocks 40. 43 and 44, as will be evident from Figs. 1 and 6, said .blocks being much thicker and the grooves therein extending only partially through the same. In assembling the tiles or blocks on the supports for the same, the block 40 is first slipped on right of Figs. 1 and into the position it is to assume in the finished arch. Next the block or tile 43 is moved into position adjacent the block-or tile 40, then the block or tile 44 is moved into position and finally the block or tile 45 is moved into position, any suitable number being used to obtain the desired length for the arch. The tile 45 beingopen only from one end holds or locks the other tiles'in position and this tile must be removed before the other tiles can be removed. The ledges or shelf- like flanges 28 and 28 are provided forsupporting the vertically extending wall portlon for closing in the space between the horizontal portion of the arch and the boiler or other member 46 which is to be heated by the furnace, said vertically extending portion being made up of the refractory blocks 47 which may be ordinary fire brick if desired. The blocks 40 depend below the blocks 43 because it is desired to provide a fuel entrance opening 48 that is smaller in size than the interior of the fire box below the arch in the form shown in Fig. 6. Any suitable structure may be supported on the upper flanges or I-beams 22, a plate 49 being shown in Fig. 6 supporting the refractory blocks or fire bricks 50 which are placed between the forward end portion of the boiler 46 and the I- beams. The construction of arch described above can be used as well for a rear arch construction as for the arch at the front of the furnace, as shown in Fig. 5 in which the blocks 44' are all of the same size. The blocks shown in Fig. 4 are provided with grooves in the side edges thereof comprising the laterally inwardly extendlng portions 51. The material of the blocks 40 is also cut away slightly at 52, thus providing a vertical channel between adjacent blocks so that the channels formed between the cut-- away portions 52 and the laterally extending channels 51 will form a substantially T- shaped slot between the adjacent members 40 so that the members 23 and 24 when fastened together on the I-beam 22' will be adapted to receive said blocks 40' to support the same. Narrow end members 40" may be provided at the ends of the arch, as shown in Fig. 4, .so as to give the proper width thereto if this is necessary.

In Fig. 4 the arch is. shown as being applied to the forward portion of the furnace and the brick work 50 is mounted 'on the I-beams 22 in a similar manner to which the brick work- 5O is mounted on the I-beams 22inFig. 6. p

In Fig. 5 the supporting members 23 and 24 are mounted in the I-beams 22." in the same manner as previously described.

In Fig. 7 a much wider arch is shown in which it is necessary to use a greater number of I-beams than that shown in the forms described above.

provided which extend transversely of the furnace and which support the brick work 56 thereon in a manner similar to that previously described. Mounted on said I-beams by means of the hook-like portions 57 and 58 are the members 59, said members 59 each forming one member of a pair, the other member 60 of which is provided with the hook- like portions 61 and 62 engaging with the flanges of the I-beams. The hooks 57 and 58 and 61 and 62 engageon opposite sides of the I-beams 55 in the manner described in connection with the members 23 and 24, said members 59 and 60 being secured together by means of the bolt 63 in the manner previously described. A mem- In Fig. 7 the I-beams 55 are site the same having the hook-like portions 69 and 70 engaging with the flanges on the I-beams opposite those engaged by the hooklike members 65 and 66. The members 64 and 68 are provided with laterally extending flanges 71, similar to the flanges 28, for supporting the refractory blocks 7 2 of the vertically extending wall between the boiler and the horizontal portion of the arch. It is desirable in an arch having the length of the one shown in Fig. 7 to provide for expansion inthe supporting members, and yet provide a supporting member which is rigid both in a vertical and transverse direction, but which allows for expansion lengthwise of the member. In order to provide for this expansion a joint is provided at the meeting ends of the members 59, 60, 64 and ,68, asclearly shown in Figs. 12 and 13. As shown in said figures, the member 59 is provided with a cutaway portion at 7 3 and an extension at 74 having the lower edge portion 75 thereof parallel with the top of the member 59. The member 60 is provided with a cutaway portion at 76 which is cutaway from the top of the member 60, similar to the cutaway portion 73 and with an extension 7 7 similar to the extension 74, having an upper edge 78 parallel to the lower edge of the member 60. The member 64 is provided with a cutaway portion at 79 which-is adapted to receive the extension 74 and is provided with an extension 80 which is adapted to enter the cutaway portion 73, while the member 68 is provided with an extension 81 corresponding to the cutaway portion 7 6of the member 60, and is provided with a cutaway portion 82 adapted to "receive the extension 77. Due to the engage.

ment of the upper edge 78 of the member 77 with the lower edge 83 of the member 81 and engagement of the lower edge 75 of the member 74 with the upper edge of the member 80, the members 59, 60, 64 and 68 are held from relative twisting movement in a vertical plane due to the fact that the members 59- and 60 and the members 64 and 6 8 are bolted together.

In a'similar manner due to engagement of the extension 81 and 74 and the extension 80 and 77, any twisting around a vertical axis or any lateral movement of the endsof the members 59, 60, 64 and 68 is prevented. Thus a rigid member from end tov end of the device is provided, which, however, is.

adapted to allow for a longitudinal expan sion due to .changes in temperature. The members 59 and 60 may be provided with downwardly extending portions 85 and 85', which together form a member T-shaped in cross section, as clearly shown in Fig. 14,

for receiving a tile or block of refractorymaterial 86 which is located at a lower position than the blocks of refractory material 87, which are supported by the main body portions of the members 59, 60, 64 and 68. p

The members 64 and 68, as shown in Fig. 15, may be provided with a hanger or extension 88 which is provided with a. web portion 89, laterally extending flanges 90 and 90 at the bottom thereof, and a pair of laterally extending flanges 91 and 91 which merge into vertically extending flange portions 92 and 92 terminating in inwardly extending flanges 93 and 93. Said flanges form a T-shaped groove or slot adapted to be received on the correspondingly shaped portions of the members 64 and 68 so as to hold said bracket 88 in any desired position on the members 64 and 68, said bracket 88 being adapted to receive the tile 94 extending downwardly below the tiles 87 thereon in a similar manner to that in which the tiles 87 and 86 are mounted on said supporting members as described above.

In Figs. 8 and 9 is shown an arch which of stepped formation, said arch being supported from the I-beams 95 by means ofthe supporting members 96 and 97 which are provided with the hook- like portions 98 and 99 and 100 and 101 respectively for securing the same on the I-beams 95, said supporting members being provided with the ledges or flanges 102 and 102 for supporting the blocks of refractory materia 103 forming the vertical wall at the rear of the arch and being provided with pairs of stepped flanges 104 and 104', 105 and 105, 106 and 106', and 107 and 107 respectively for receiving the T-shaped grooves in the tiles 114, 115, 1.16 and 117 respectively, the members 97 and 96 being held together by means of a bolt 108 in a manner similar to that previously described, and the brick work at 109 being supported by the plates 110 mounted on the I-beams 95, as in the other forms.

From the above itwill be seen that the arch construction embodying my improved supporting structure is adaptable for use in arches of various types, styles and sizes, that the same is easily applied and readily taken down, that no machine work 1s necessary in securing the supporting members to the I-beams or said structural members, and that ample provision is made in the constructions described for expansion due to heat.

Having thus described my invention, what I desire to claim and secure by U. S. Letters Patent is:

1. In an arch construction, a pair of spaced supports, a pair of structural members extending between said supports, a hanger comprising a pair of members eac having means engaging each of said structural members, blocks of refractory material each engaging both members of sa d hanger and means for holding said pair of members from longitudinal movement,

- whereby said hanger is interlocked both with I said pair, means for securing said pair of p from said beams, comprising pairs of brack' ing the same, of blocks memberstogether against longitudinal shiiting and blocks of refractory material each engaging both of said members. whereby said blocks co-operate with said securing means to hold said pair of members against separation. V

3. In an arch construction, the combination with beams and means for supportof refractory material and means for. suspending said blocks ets having hook-like portions engaging with sand beams and means for securing each pair of sa1d brackets together, each of said blocks engaging both brackets of a pair to hold the same in therewith. f 4. In an arch construction, the combination with beams and means for supporting the same, of blocks of refractory material and means for suspending said blocks from said beams, comprising brackets arranged in pairs and extending through said blocks and having oppositely directed hook-like portions engaging with said beams, and means for securing the brackets of each pair together to hold the same from longitudinal movement and in interlocking relation with a plurality of said beams, said blocks holding the pair of brackets upon which the same are mounted from separation.

5. In an arch construction, a pair of spaced s upports, a pair of flanged structural interlocking relation members extending between said supports,

a hanger comprising a pair of members each having means engaginga flange of each of said structural members, blocks of refractory material each engaging both members of said hanger and means for holding said pair of members from, longitudinal movement, whereby said hanger is interlocked both with said structural members andsaid blocks.

' 6. In an arch construction, a pair of supporting beams, a hanger comprising a pair of flanged members each engaging both beams of said pair, means for securing said pair of members together against longitudinal shifting and blocks of refractory material each engaging both .of said flanged members, whereby said blocks cooperate with said securing means to hold said pair of members against separation.

7. In an arch construction, the combination with a pair of flanged beams of a hanger comprising a pair of members having hook-like portions each loosely slidably engaging a flange on each of said beams,

' wider laterally the top thereof.

and means for securing said members together to form a hanger interlocked with said beams but slidable thereon when so interlocked.

8. In an arch construction, the combination with a hanger comprising a pair of flanged members each having supporting means thereon for blocks of refractory material, of means for securing said members together back to back with, the flanges thereof extending in oppositedirections and refractory blocks supported by the flanges of said members and engaging opposite sides of said hanger.

9. In an arch construction, the combination with a hanger. comprising a pair of flanged members each having supporting means'thereon for blocks of refractory ma: terial, of a single central securing member for securing said members together back to back with the flanges thereof extending in opposite directions and refractory blocks supported by the flanges of said membersv and engaging opposite sides of said hanger.

In an arch construction, the combination with a pair of flanged beams of a hanger comprising a pair of members havof said bracket members to interlock said blocks with said hangers, whereby said hangers are interlocked both with said beams and blocks. 7

12. A bracket member for supporting refractory material comprising a body portion having a pair of spaced hooks thereon extending in the same direction from the 'top edge thereof, a laterally extending flange along the bottom edge thereof and a extending shelflike flange at 13. In an arch construction, the combination with a pair of flanged beams, of a hanger comprising a pair of members each having means thereon loosely slidably engaging a flange on each of said beams, and; means for securing said members together to form a hanger interlocked with said beams but freely slidable thereon when so interlocked.

14. In an arch construction, the combination with a pair of flanged beams, of a. hanger comprising a pair of members each having means thereon loosely slidably engaging a flange on each of said beams, and a single central securing member for 'securing said members together to form a hanger interlocked with said beams but freely slid-able thereon when. so interlocked. \15. In. an arch construction, a hanger comprising a pair of members each having a web portion, a flange extending laterally from one longitudinal edge of said web portion and a. pair of hooklike ears projecting edgewise beyond the other longitudinal edge of said web portion, one of said ears being elongated and being adapted to receive securing means toconnect said members in pairs.

16. In an arch. construction, a hanger comprising a pair of members each having a web portion, a flange extending laterally from one longitudinal edge of said web portion, a pair of hooklike ears projecting edgewise beyond the other longitudinal edge of said web portion, one of said ears being elongated and being adapted to receive securing means to connect said members in pairs, and a short. wide flange projecting laterally from said last mentioned edge of said web portion. I

17. In an arch construction, the combination with a pair of flanged. beams, of a hanger comprising a pair of members each having means thereon loosely slidably engaging a flange on each of said beams, means for securing said members together to form a hanger interlocked with said beams but freely slidable thereon when so interlocked and blocks of refractory material freely slidably engaging said hanger;

In witness whereof, I hereunto subscribe my name this 16th day of June, A. 1).,

GEORGE A. KOHOUT.

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