US1495596A - Boiler - Google Patents

Description

May 2?, 1924.

E. C. JACOBSON BOILER,

. Filed April' 24.

1919 2 Sheets-Sheet l` M1. @u w uw fw N@ mwN Q mNx y mm 1 @@@MQG mmm c fmw n f @w Q NN @NY @y Patented May 27, 1924.

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ERA C. IACOBSON, OF OAK PARK, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AMERICAN STEAM TRUCK COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

BOILER.

Application filed April 24, 1919. Serial No. 292,361.

y useful Improvement in Boilers, of which the following is a specification.

My invention relates to an improved boiler construction of the sectional type in which the tubes contain the water and the fire from the furnace surrounds the tubes. My invention is characterized by the use of a plurality of sections which are similar, in alternate arrangement so as to afford ready facilities for mounting the sections in place and for removing any section 'or sections if it may be necessary in. order to repair the boiler. By vthisarrangement. also, the space above the furnace is completely utilized to heat the water in the water tubes, and as a result efficient operation of the boiler as a whole is secured. The units are preferably constructed by securing a plurality of similar water tubes between end headers, preferably by means of fusing the tubes to the headers, as for example by means of the' oxyacetylene iiame so that the units, when completed, are practically homogeneous sections. kIn constructingl the unit, I prefer to make the wat-er tubes slightly curved so that there will be no undue strain'locally upon the header asa result of'v unequalexpansion and contraction of the several vwater. tubes of any one unit.

By my construction, the headers at one 1 end of theunit are disposed in lower position than the headers at the other end of the unit, and the upper headers are connected in any suitable manner to a steam drum which is connected bysuitable'pipes with the lower headers so as to maintain them full of water at all times, the water level in the steam drumbeing preferably maintained slightly above the connection to the lower headers. By my construction, shields are provided in the 4steam drum to prevent the steam entering the drum from the upper header, being projected directly to the outlet opening from thedrum andl thus'carrying with it water which may be entrained in the steam. In my construction I also provide preheating coils for heating the water before it is delivered to the heating units of the boiler and also superheating coils for superheating the steam after it is'delivered from the steam drum and before it is delivered from the boiler to the engine to be driven.

My invention will best be understood by reference to the accompanying drawings showing preferred embodiments thereof in whichv Fig. 1 shows the preferred form of my boiler in front elevation, the casing being removed to more clearly show the boiler parts, l

Fig. 2 shows the parts seen in Fig. 1 in side elevation,

Fig. 3 shows in a view similar to Fig. 1 a modified construction of boiler sections as arranged and placed in a boiler, and

Fig. 4 shows in a view similar to Fig. 2 the construction in side view shown in Fig. 3.

Similar numerals refer to similar parts throughout the several views.

As shown in Figs. 1 and 2, the boiler consists of a plurality of sections 10 and 11, disposed in alternate arrangement throughout the boiler. Each section 10 consists of water headers 12 and 13 between which the water tubes 14 are located. These tubes 14 are slightly curved and are connected at their ends, preferably by fusion, to the headers 12 and 13, as a result of which the joints between the tubes and the headers are practically homogeneous with the structure of the tubes and headers itself, and, therefore, the heating and cooling of the parts cannot produce unequal strain at the joints, and furthermore, the curved construction of the water tubes results in permitting any tube which may be subjected to unusual expansion to spring away from its original path slightly so as to relieve the joint atv the headers from undue strain. Each of the sections 11 consists of headers 15 and 16 between which the water tubes 17 are secured in the manner above described for the tubes 14:. The units 10 and 1l are of the same general construction, differing only in details of construction permitting their assembly in the furnace to completely utilize the space of the furnace and to better facilitate removing any particular unit if desired. Projecting flattened lugs, as shown at 18 and 19 are provided for closing the upper ends of the headers 12 and 15 and for engaging the rods 20 and 21 respectively. Each of the upper headers 13 and 15 is similarly closed at its lower end and vprovided with a flattened lug, as shown on 22 and 23 for engaging the rods 21 and 20 respectively. The lower ends of the headers 12 and 16 are connected by union connectors 24 and 25 with water supply pipes 26 and 27, which are of large enough size to also constitute mud drums for the boiler. The pipes 26 and 27 are connected at the rear end of the boiler by a pipe 28 which in turn is connected with a water supply pipe 29, which pipe receives its supply of water from the preheating coils 30 located in the top of the boiler and which are supplied from the water supply pipe 31. The pipes 26 and 27 are also connected at their rear end by pipes 32 and 33 with the lower portion of a steam drum 34 so that the water which collects in the steam drum readily finds its way back to the water pipes 26 and 27 and thence to the lower headers 12 and 16.

The upper ends of the upper headers 13 and 15 are connected by pipes 35 and 36 through union connectors 37 and 38 with the sides of the steam drum 34, in which deflec'tors or shields 39 and 40 are disposed adjacent the openings into the drum 34 to direct the steam and any water that may be entrained therein downwardly in the drum 34 away from the outlet pipe 41 connected with the upper part of the drum to carry steam from the drum to the superheating coils 42 and 43 from which the steam is delivered from the boiler to the pipe 44.

It is to be noted that as aI result of the arrangement of the water pipes 14 and 17 that thev superheating pipes 43 may be located below the water heating units just sufficiently above the lire from the furnace as to not over heat the superheating coils 43.

As shown in Fig. 1, the heat for the boiler is generated by means of a liquid fuel burner 47, arranged to project its flame horizontally against a baiile of lire brick, or similar material, 48, which by being heated to white heat radiates the heat to the boiler tubes over it. rlhe water pipes 26 and 27 are provided with blow oftl cocks 45 and 46 for cleaning the mud from the said water pipes as desired.

1t is to be noted that although the water headers of the several water heating sections are of considerably larger diameter than the water tubes between the headers, that the water tubes may be located practically in contact with each other since the headers at the end of the water heating sections are alternated; that is to say, the right and left hand headers of the section 1() near the observer in Fig. 1 are the lower and upper headers respectively of said section, the next section i-s section 11 having its right and left hand headersl 15 and 16 above Yand below the headers 12 and 13 respectively, the next section is another section 10 and then another section 11, and so on across the boiler, as a result of which thel entire space from front to rear of the boiler is available for the headers 12 which are the headers of alternate sections of the boiler while the same is true of the headers 15 which are the headers of the intermediate sections of the boiler and that each header may occupy twice the space from front to rear that is required for the water tubes themselves. The water tubes of the several sections. may be thus brought closely together leaving ample room for the larger headers and as a result of the alternate inclination of' the water tubes of the several sections, the heat from the furnace finds its'way up tothe water tubes and necessarily comes. in contact with practically the entire outer surface of the said water tubes in passing upward through the boiler. The water level of the boiler is preferably just above the connection of the pipes 32 and 33; to the steam drum 34,

When it is desired toy remove a particular section from the boiler, the rods 2O and 21 are removed, the corresponding union connectors. are undone and the particular unit which is to be removed may betaken from the boiler without disturbing the remaining parts.

As a result ofy the construction described, it will appear that each unit or section off the boiler is similar-ly located with 'respect to the furnacey and thus operates equally efficiently', that each unit is located so thatl it has good water circulationthrou-gh it. at all times for effectively heating the water contained in it and that steam is delivered from each heating unit tothe steam drum in, relatively dry conditionand that the steam delivered from the steam drum to the pipe 41 is practically free from entrained water.

1n the construction sho-wn in Figs. 3 and 4, the boiler sections 49 and 50 consist of lower vertical headers 51' and 52 and upper horizontal headers. 53 and 54 between which curved water tubes 5 5 and 56. extend. ' lfhe headers 51 and 52 are lconnected in substantially the manner above described with water supply pipe-s 57 and 58', the` rear ends of which are connected together by a pipe 59, which in turn is connected with a supply pipe 60 connecting the pipe 59 with the preheating coils 61, which coils are. supplied with water by a pipe 62. The water supply pipes 57 and 58' are connected by pipes 63 and 64 with the llowerportion ofthe steam drum 65, which has connected with its upper portion an outlet pipe 66 leading to superheating coil 67' from which the steam is discharged Jfrom the boiler through pipe 68. The upper headers 53 and 54 are connected in substantially the manner above described with the sides of the steam drum 65, the principal difference being that these headers are above the water line instead of being below it as described above for the construction shown in Figs. 1 and 2.

The mode of operation of the construction shown in Figs. 3 and 4 is substantially the same as that shown in Figs. 1 and 2, the principal difference being in the mechanical construction of the unit sections of the boiler, for in the case shown in Figs. 3 and 4, the several water tubes are of different lengths for any given section instead of being the same length as shown in Fig. l, thus necessitating somewhat greater expense in manufacture of the type shown in Fig. 3. In the construction of Fig. 3, there is the advantage that the supporting rods shown in Fig. 1 are not required, thus making the removal of any desired unit easier than is the case in Fig. 1. The water heating units in Fig. 3 are in alternate arrangement substantially as described above in connection with Fig. 1 with the same advantages there stated.

While I have shown my invention in the particular embodiments above described, I do not, however, limit myself to these exact constructions in carrying out my invention as I may employ equivalents thereof known to the art at the time of the ling of this application without departing from the scope of the appended claims.

What I claim is:

1. In a boiler, the combination of a plurality of units arranged in alternate relation in vertical planes, each unit consisting of two substantially parallel headers and tubes of substantially the same length connecting said headers, said tubes being curved in the same direction and to substantially the same degree throughout their length, the tubes of alternate units extending upwards towards one side of the boiler and the tubes of intermediate units extending upwardly to- Wards the other side of the boiler and in close proximity to the tubes of the alternate units, whereby the upper headers on either side of the boiler are entirely above and inclined to the lower headers on the same side of the boiler, connections for supplying water to and delivering steam from said units, the adjacent ends of the headers on either side of the boiler being flattened and overlapping each other, and a rod on each side of the boiler extending through all of said flattened ends on that side of the boiler.

. `2. In aboiler,.the-combinationof aplurality of-'units'arranged in alternate relation in vertical. planes, each unit consisting of two substantially parallel headers and tubes of substantially the same Vlength connecting said headers, said tubes being curved in arcs of circles throughout their,v length withtheir concave sides downwards, the tubes of alternate units extending upwards towards one side of the boiler and the tubes of intermediate units extending upwardly towards the other side of the boiler and in close proximity to the tubes of the alternate units, whereby the upper headers on either side of the boiler are entirely above and inclined to the lower headers on the same side of the boiler, connections for supplying water to and delivering steam from said units, the adjacent ends of the headers on either side of the boiler being fiattened and overlapping each other, and a rod on each side of the boiler extending through all of said flattened ends on that side of the boiler.

3. In a boiler, the combination of a plurality of adjacent units disposed in Vertical planes, each unit consisting of end headers and tubes between said headers, the tubes of alternate units being inclined upwardly in one direction and the tubes of intermediate units being in close proximity to the tubes of the alternate units and extending upwardly in the opposite direction to bring the headers of alternate units above the headers of intermediate units on the same side of the boiler with the adjacent ends of said headers overlapping each other, and a rod extending through all of said overlapping ends on each side of the boiler.

4. In a boiler, the combination of a plurality of adjacent units disposed in vertical planes, each unit consisting of end headers and tubes between said headers, the tubes of alternate units being inclined upwardly in one direction and the tubes of intermediate units being in close proximity to the tubes of the alternate units and extending upwardly in the opposite direction to bring the headers of alternate units above the headers of intermediatennits on the same side of the boiler with the adjacent ends of said headers overlapping each other, arod extending through all of said overlapping ends on each side of the boiler, and spacing members on each rod between the overlapping ends thereon.

5. In a boiler, the combination of a plurality of adjacent units disposed in vertical planes, each unit consisting of end headers and tubes between said headers, the tubes of alternate units being inclined upwardly in one direction and the tubes of intermediate units being in close proximity to the tubes of the alternate units and extending upwardly in the opposite direction to bring the head- @l Mesem@ ers ofv alternate: units above the headers: of on, the. ends of each rod being;` threadeel and intermediate untson the, same side of the engaging nuts'tosel'amp the overlapping ends boiler with the adjacent ends: of Said; headers Jhereon. 10

overlapping each other, a roel extending In Witness whereof, I hereunto Subscribe 5 through all of said overlapping ends oneach my name this 31st day of March, A. D. i919.

side of the boiler, and spacing members on each rod` between the overlapping ends;A there ERA C. JCO'BSN.

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