US2006836A

US2006836A - Water heater

Info

Publication number: US2006836A
Application number: US739089A
Authority: US
Inventors: John J Lavender
Original assignee: LESTER M FRIEDMAN
Current assignee: LESTER M FRIEDMAN
Priority date: 1934-08-09
Filing date: 1934-08-09
Publication date: 1935-07-02
Anticipated expiration: 1952-07-02

Description

July 2 1935- 1J. LAVENDER u 2,006,836

WATER HEATER Filed Aug. 9, 1934 INVENTOR l@fa/2n alla vender Patented July 2, 1935 UNITED STATES WATER HEATER John J. Lavender, Bronx, N. Y., assignor to Lester M. Friedman, New York, N. Y.

Application August 9, 1934, Serial No. 739,089

9 Claims.

lThis invention relates to Water heaters oi the submerged type, wherein a water circulating heat exchange unit is supported in submerged relation in a boiler.

Special objects of the invention are to provide a water heater oi this general nature, which will have a high heat exchange efciency for a relatively large volume of water, making a storage tan.; unnecessary; in which the water will be heated in circulation and flow maintained to prevent deposit and accumulation oi lime and other impurities; which will be of simple rugged design, relatively inexpensive and adapted to be readily installed at low cost.

Other objects of the invention and the novel features of construction, combinations and relations of parts by which the objects are attained will appear as the speciiication proceeds.

The drawing accompanying and forming part of the specification illustrates one of the practical commercial embodiments of the invention, it being understood that the structure may be modiiied and changed in various ways all within the true spirit and broad scope of the invention.

Fig. l in the drawing is a broken and part sectional perspective View of the complete unit .as mounted in a boiler shell.

Fig. 2 is an enlarged cross-sectional view as on substantially the plane of line 2-2 of Fig. l, showing in particular the inner or back header.

Fig. 3 is a similar View as on substantially the plane of line 3 3 of Fig. l, looking toward the outer or front header.

Fig. 4 is a further enlarged broken sectional detail as on line i-d or Fig. 2, through the left hand mixing chamber of the inner header.

Fig. 5 is a similarly enlarged broken sectional detail substantially as on line 5--5 of Fig. 3, through the inlet chamber of the outer header.

The heat exchange unit consists basicallyA of 'an outer header l, divided by horizontal and Yvertical partitions 8, 9, into a cold water inlet chamber l), a mixing chamber H, and a hot Water outlet chamber l2, an inner header i3, divided by vertical partition I4, into mixing and return chambers l5, It and tubing l1, connecting the upper inlet chamber H3 of the cuter header with the upper portion oi chamber l5, in the inner header, tubing I8 extending from the lower portion of this chamber back to one side of the lower, mixing chamber Il, in the outer header, tubing it extending from the other side of this chamber to the lower portion of chamber l5, in the inner header and tubing 2t,

' extending from the upper portion oi this last Ychamber to the hot water outlet chamber I2,

of the outer header.

In the illustration, there are seven tubes in each group, all of the same size, but the size and Y number of tubes, as a whole or in thedifferent groups may be varied as conditions may dictate.

The tubes secured to the headers in a novel manner as illustrated particularly'in Figs. i and 5.

posing walls of the headers. These openings are counterbored to the size of the tube ends as at 22, leaving the shoulders 23, for the ends of,the tubes to abut. These counterbores are broached or seamed on a bevel as at 2Q, to leave the convergeht tapering spaces about the tubes and these spaces are iled with a solder metal 25.

The flowing Aof the solder in and around the ends oi the tubes is made practical by pro- These views show that openings 2|, are drilled or otherwise formed in the inner opviding a rim or flange 26, all about the tube receiving portion of the header wall.

in practice, the tubes, all cut to the same length, are driven into their seats in one of the headers and, arranged with the tubes standing f vertically, the header wall is heated and the solder flowed in about the tubes under confinement of the rim 2li. This operation is then reversed for the other header.

While the securing of the tubes at one end in one header serves to space them quite deiinitely, it is a fact that at their free ends, the tubes may offset to some extent and make it difficult to enter them all into their seats in the opposite header. To overcome this diiiiculty,

there is provided in the illustration a spacer or gage plate 2l, perforated in exact accordance With the seats in the headers. After securing the tubes in one header, this gage plate is slipped over the free ends of the tubes, individual tubes being bent one way or another to pass through the gage openings in this plate. With the plate in position over the free ends or the tubes, they will be held in proper register to then pass freely into the seats in the Other header. After serving this registering purpose, the gage plate may be slipped further back along the tubes out of the way of soldering operations on the second header, these being carried out as in the rst instance, by locating the assembled parts with this header upright andthe flange 126, of the same dening a solder receiving well about the tube ends.

The gage plate 2l, after its use as described, serves as a permanent spacer for the tubes,

being positioned at any desired intermediate it acts as a support for the inner or intermediate portion of the heater by having a chain 28, or other supporting medium engaged or connected therewith. This supporting function becomes particularly important in extra long forms of the heater and in such instances, the spacer and supporting plate is located where it can best support the inner header and intermediate portions of tubing. If considered necessary or de- 5 sirable, an extra one or more of these supporting plates may be slipped over the tubing before the second header is applied and then be positioned on the tubing, where they can best serve their purposes.

In addition to its function as asolder conf'lning well, the flange 26 of the outer header serves as a locating and supporting medium in theopening 29, in which it is entered in the boiler plate 30, as will be clear particularly from Figs. 1 and 5..

T0 securely fasten the unit to the boiler as simply as possible and without straining the boiler shell, the structure as shown in Figs, 1, 3 an'd`5 is employed, involving a heavy outstanding `flange 3|, all about the outer header to overlap that part of the boiler plate about the opening 29 therein and ODDOSed to this at the inside 0f the boiler plate are the washer enlargements or clamp plates 32. These may extend partly or completely about the boiler opening and through them extend the heavy bolts 33, projecting through openings 34, in the boiler shell and throughthe bolt lug enlargments 35 of flange 3|. A suitable gasket 36, is placed back of this flange.V When the nuts 3'|'on the outer ends of the Ibolts are turned down, it will be seen that the header will be securely and firmly attached without Vstraining the` boiler sheet.

To enable inspection and'v cleanout if necessary, removable plugs such as indicated at 38, may be provided in Vthe outer walls of either or bOth headers. Also for protective purposes, one or more fuse plugs such as shown at 39, Fig. 5, may be entered in thevouter header. A thermometer or thermometers may be entered in place of the plugs in the cold water inlet or hot water Youtlet chambers, either one or both.

The construction illustrated makes a'particularly efficient heat exchanger for water heating purposes. The installation is relatively simple and can be quickly made after an opening of j the requisite size is cut in the boiler shell. The four way flow of water through the several groups of relatively small pipes assures rapid `heating by flow alone, dispensing entirely with the need for a storage tank.V This circulation heating also eliminates sedimentation and lime incrustation and the like. The tubes may be Vall of the same size, keeping the cost low and the matter of assembly simple.

A suitable cold water supply connection is indicated at 40, in Fig. 1 and a hot water outlet pipe at 4|. These are both entered through the top of the inlet and outlet chambers of the outer header to prevent siphoning.

'I'he bolts 33 are shown as of special construction having the opposite ends screwthreaded, but the intermediate portions 42 which pass through the lugs of the header, plain and unthreaded. These plain portions of the bolts further are shown as bevelled at 4,3, where they join the inner threaded portions of the bolts. This latter is to crowd packing at 44, against the face of the sheet around the bolt openings 34.

It is at present preferred to screw-thread both the openings 34 in the boiler sheet and bolt openings '44 in the clamp plates 32. 'I'he parts are then assembled by threading the bolts in through the boiler sheet and clamp plates.

the bolts fully seat in the boiler sheet, the packing 44 is wound around the bolts, so that the bevelled shoulders 43 will carry this packing down into sealing engagement and prevent any leakage past the threads. The plain unthreaded portions 42 enable the use of a Stillson for setting the bolts up tight in the boiler sheet or one or two nuts may be applied to the outer ends of the bolts for turning them into the boiler sheet. The clamp plates, if necessary, may be turned more or less, to bring them up tight againstthe inner face of the boiler sheet and these may then be locked against further turning by lock nuts 45, applied to the extreme inner ends of the bolts. The gasket 36 is then placed over the projecting outer ends of the bolts, after which the inner end of the heating unit is inserted through the boiler opening until the bolt lugs, which are unthreaded, slide into posibeY very slightly larger than the actual active portion of the heating unit. The front and back headers may each be a single integral casting and the tubing is all in straight lengths without any loops of pipe. The gage plate likewise is a single integral piece drilled in conformity with the spacing of the tubes. This plate when in position on the tubes serves as a spreader holding the tubes spaced outwardly as well as preventing them from collapsing toward each other.

What is claimed is:

1. In a heater of the character disclosed, a header having a diaphragm wall perforated to receive the ends of circulation tubes and aflange surrounding the perforated portions of said wall to confine a tube sealing medium. k

2. In a wat-er heater of the character disclosed, a header having a Wall perforated to receive circulating tubing and a mounting flange projecting from said wall andforming a Well about the perforated portion of the wall to hold a tube sealing medium. y 3. A heat exchanger of the character disclosed, comprising end headers with perforated opposed walls having counterbored and beveled openings therein and surrounded by a confining flange, tubing engaged at opposite ends in said counterbored beveled openings, soldering metal confined by said flanges and entered in the beveled seats about said tube ends, one of said headers having inlet and outlet chambers and a mixing chamber in communication with the tubing and the other header having mixing chambers in communication with said tubing.

4. A heat exchanger of the character disclosed,

comprising end headers with perforated opposed walls having counterbored and beveled openings thereinand surrounded by a confining flange,

tubing engaged at opposite ends in said counter- ,I

communication with the tubing and the other Just before header having mixing chambers in communica- 75 an opening to receive a Water heating unit and screw threaded bolt receiving openings, bolts turned into said screw-threaded openings and having bevelled portions adjacent the outer face of the sheet, bolt packing about the bolts in front of said bevelled portions, heavy clamp members on the bolts at the inner face of the sheet, a water heating unit extended through the sheet opening and having a portion closing said opening and perforated to slide over outer projecting portions of the bolts, a gasket beneath said covering portion of the heater unit and covering the bolt packings and nuts on the projecting outer ends of the bolts for securing said covering portion and for compressing the gasket against the boiler sheet and about said bolt packings.

6. In combination with a boiler sheet having an opening to receive a water heating unit and screw-threaded bolt receiving openings, bolts turned into said screw-threaded openings and having bevelled portions adjacent the outer face of the sheet, bolt packing about the bolts in front of said bevelled portions, heavy clamp members on the bolts at the inner face of the sheet, a water heating unit extended through the sheet opening and having a portion closing said opening and perforated to slide over outer projecting portions of the bolts, a gasket beneath said covering portion of the heater unit and covering the bolt packings, and nuts on the projecting outer ends of the bolts for securing said covering portion and for compressing the gasket against the boiler sheet and about said bolt packings, said heavy clamp members being disposed at the sides of the sheet opening and being screw-threaded on the bolts and lock nuts on the inner ends of the bolts set up against said clamp members.

'1. A tankless water heater of the submerged type, comprising an outer header adapted to be secured to a boiler shell and consisting of a single hollow integral casting having an internal horizontal partition extending entirely across the interior of the same, a vertical partition extending from said horizontal partition to the top of said header, the upper wall of the header having a cold water inlet and a hot water outlet at opposite sides or" said internal vertical partition, said header having an integral inner wall perforated for tubing and provided with an inwardly extending ange for positioning the header in a boiler opening and for forming a solder well about the periorations in said end wall, said header further having a surrounding abutment flange for engagement against a boiler sheet, an inner header consisting of a single integral hollow casting having a single internal vertical partition and an inner perforated wall surrounded by a solder Well forming flange, straight lengths of tubing entered in said perforated inner end walls of the two headers and tube securing medium conned by said solder well forming flanges about the end portions of said tubing.

8. A tankless water heater of the submerged type, comprising an outer header having a substantially vertical ange by which the same may be secured over an opening in a vertical boiler wall and provided with an yinternal substantially horizontal partition extending entirely across the interior of the same, a substantially vertical partition extending from said horizontal partition to the top wall of said header, said top wall of the header having a substantially vertically extending cold water inlet and a substantially vertically extending hot water outlet therein at opposite sides of said internal substantially vertical partition, said substantially vertical partition thereby providing with the substantially horizontal partition cold water inlet and hot water outlet chambers in side-by-side relation in the upper portion of the header and the substantially horizontal partition providing below it a single exchange chamber in the lower portion or" the header beneath said cold water inlet and hot Water outlet chambers, an inner header having a single internal substantially vertical partition dividing the interior of the same into two chambers in side-by-side relation, tubing extending :from said cold water inlet chamber in the upper portion of the outer header to the upper portion ci one of the side-by-side chambers of the inner header, tubing extending from the lower portion of said same side chamber back to the exchange chamber in the lower portion of the outer header below the inlet chamber therein, tubing extending from said same exchange chamber in the outer header from below the hot water outlet chamber to the lower portion of the other side chamber of the inner header and tubing extending from the upper portion of said latter side chamber of the inner header back to the hot water outlet chamber in the upper portion of the outer header.

9. A tankless water heater of the submerged type, comprising an outer header having an internal horizontally extending partition across the interior of the same and a partition extending vertically from said horizontal partition to the upper wall of the header and thereby forming an exchange chamber entirely across the lower portion of the header and cold water inlet and hot water outlet chambers in side-byside relation in the upper portion of said header above said exchange chamber, said upper chambers having inlet and outlet passages respectively or entrance of cold water and outow of hot water, an inner header having a single internal substantially vertical partition dividing the interior of the same into two chambers in side-by-side relation, tubing extending from said cold water inlet chamber in the upper portion of the outer header to the upper portion of one of the side-by-side chambers in the inner header, tubing extending from the lower portion or" said same side chamber back to the exchange chamber in the lower portion of the outer header below the inlet chamber therein, tubing extending from the opposite end portion of said same exchange chamber below the hot water outlet chamber to the lower portion of the other side chamber of the inner header and tubing extending from the upper portion of said latter side chamber oi the inner header back to the hot water outlet chamber in the upper portion of the outer header.

JOI-IN J. LAVENDER.