US1967706A

US1967706A - Hot water generator

Info

Publication number: US1967706A
Application number: US680023A
Authority: US
Inventors: Joseph W Carroll
Original assignee: Carroll & Sons P
Current assignee: Carroll & Sons P; P Carroll & Sons
Priority date: 1933-07-12
Filing date: 1933-07-12
Publication date: 1934-07-24
Anticipated expiration: 1951-07-24

Description

` J. w. CARROLL HOT WATER GENERATOR Filed July 12 July 24, 1934.

l f1 Ven for. W. Carro/l.

l' 'or/n'ey.

Patented July 24, 1934 HoT WATER GENERATOR Joseph W. Carroll, Philadelphia, Pa., assignor to P. Carroll & Sons, Philadelphia, Pa.,r a copartnership composed of Edward P. Carroll and Joseph W. Carroll Application July 12, 1933', serial No. 680,023

'z claims. (01.;257-238) My invention has special utility as a hot Water' generator in which the heating kmedium is live or exhaust steam, or both, as Amay be convenient or necessary under the conditions of use; and 5 in construction is especially adapted as akheater forA household and other domestic uses, wherein simplicity in design and relatively small size are desirable. f

This application is in part a continuing application of my application Serial No. 614,423, iiled May31, 1932, which discloses a generator or water heater comprising a vboiler-flike tank or shell adapted to be normally maintained full of water under suitableA pressure to insure circulation and delivery to the place of use. 'The tank, ,moreoveig is provided with two heating means of dilerent capacities, one of which is positioned near the inner bottom portion of the tank, and the other near the upper portion 20 thereof, said heating means adapted for sieparate or conjoint heating of the body of water Within the boiler-like tank or shell and suitable for large production of hot watery My present invention is intended as a water heating means rof less capacity than the apparatus of my aforesaid application, and comprises a single heating means with similar steam circulating means but of ylesser capacity than shown therein. Moreover, the heating means is located wholly in the lower portion ofthe boilerlike tank or shell instead of being arranged in both the upper and lower portions thereof.

More specically, the heating section arranged in the lower part of the boiler-like tank or shell consists of a return tube construction in which there is a large tube closed at the inner end and having its outer or front end securelyY expanded and beaded Within a heavy steel tube sheet, said closed tube constituting a jacket. Inside of the said tubular jacket is provided a relatively smaller tube arranged to convey the heating steam to the extreme end of the water heating tube or jacket, through which the water of condensation returns to a condensate chamber into which the large or jacket tube extends, thereby providing at all times removal of condensate and circulation of steam through the heating section. In this manner, the outer surface of the jacket. tube becomes Va direct heating surface for its entire area, and the inneror `steamdelivery tube is insulated by the heated jacket or outer tube and will thereby retain the steam heat throughout its length and insure a supply` of relativelydry steamto the closed end of the outeror jacket tube, whereby the great-v rtive view illustrating the manner of supporting eter of the jacket tube 12,v and the tank is furest heating eiciency is secured. The front end of the inner tube extends through a head which constitutes a condensate receiving chamber from which the condensate may be drained through a suitable steam trap. 'I'he inner tube 60 `communicates directly with a steam main and conveys the steam therefrom to the distant or inner end of the jacketk tube from which the condensate returns along the annular passage formed between the inner steam tube and the outer jacket tube.l Moreover, the inner steam tube is supported by the inner Wall of the jacket tube and the 4latteris suspended by a bracket welded or lotherwise secured to the inner wall 'of the boiler-like tank. Furthermore, the heavy 70,`

steel tube sheet to which the jacket tube is secured is bolted intermediate 'of a iianged outlet from theY boiler-like tank and a iiange of the head through which the inner steam tube ex tends and to which it is attached, whereby the parts may be dismantled for cleaning or repairs, as' maybe necessary. The cold water supply piping connects with the boiler-like tank immediately below the jacket and steam tubes and is provided with ay suitable branch or circulation tube also connected with the bottom .of the tank near the union of the jacket and steam tubes, `whereby the heatedl'water may be recirculated over the vheating pipesv and with the addition of cold water from time to time to compensate forthe hot water drawn off from the upper portion of the boiler-,like tank kfor distribution through thek house and to the distant places, as may be required. f I

c My improvements further consist of other features and details of construction which, together with those above referred to, are fully described hereinafter andpointed out in the claims.

`The invention will be better understood by referenceto the drawing,'in-which: Fig. 1 is a vertical section on line 1-1 of Fig. 2, illustrating the general construction of the hot water generator embodying my invention;v Fig. 2 is an end elevation of the same; Fig; Sis a perspecthe inner stealntube Within the outer ljacket, tube; and Fig. 4 is an enlarged View of the bushing and sweated joint shown in Fig. 1. The generator tank 2,is made of any desired diameter and length to provide capacity to suit the purpose for which the generator is designed. In general, the forward head 3 of the tank is provided near its lower part with a flanged port 'lsomewhat larger than the outside diamther provided near the flanged port with a feed water inlet 5 and at the top and near the rear head 4 with a hot water delivery outlet 6. The ilanged port opening 7 is preferably made of a short length of tubing extending through the forward head 3 and electrically welded thereto as at 7b. The outer end of the port opening 7 is provided with a flange la which is preferably electrically welded at 7c. The heating tube or jacket 12 is provided at its inner end with a cap or head 34 which may be brazed or welded in any suitable manner. This cap is provided with an extending pin portionY 35 which loosely ts into a hole 36 in a bracket 36a, the latter riveted or welded to the lower part of the tank and extending upwardly therein to provide a supporting means for the tube near the lower portion oi the tank, whereby the tube may expand and contract freely. The outer end of `the jacket or heating tube l2 is secured to a heavy steel tube sheet 9, the union being made by expanding the tube within the tube sheet and beating the end of the tube therein.

The inner or steam receiving tube 18, being insulated by the heated jacket or outer heating tube, will retain the heat throughout its entire length, and thereby insure the supply of relatively dry steam to the closed end of the outer or heating tube 12, whereby the greatest heating efliciency is secured. The front end 16, of the inner steam tube 18 extends through the condensate chamber 24 and is secured to the head 8 by a bushing 19. The tube sheet 9 and the

l nges

7a and 8a are bolted together by means of bolts 11 and with gaskets 10 preferably interposed between the tube sheet 9 and the fianges 'Ta and 8d, to provide water tight but detachable connections for supporting the front or forward ends 20 of the

tubes

12 and 18 and, at the same time, permit supply of steam to the inner tube and the discharge of condensate from the outer or jacket tube.

For simplicity in securing the outer end of the steam tube 18 to the condensate receiving head and also connecting it with a control valve 45, I prefer to employ a bushing 19 which is screw threaded on the outer surface so as to screw into the hub of the head 8 and made smooth on the inner surface to provide a sweated joint. with the end of the inner tube 18, the outer threaded bushing also providing a threaded nipple 22 which may be screwed into and act as a support for the control valve 45 of any suitable construction (see Fig. 4). The other or inner end of the steam supply tube 18 is telescoped with the inner end of the outer or jacket tube 12 and permits longitudinal movement due to expansion and contraction; and to permit this operation between the tubes, the end of .the inner tube 18 is centrally spaced by flanges 18a, as shown in Fig- 3. These spacing flanges 18a'I are shown as formed by radially flanging the ends of the inner tube 18 and employing a portion of the flanged parts to provide spacing between the end of the inner tube 18 and the interior wall of the outer or jacket tube 12. It will suffice to employ three or more of these spacing radial flanged portions 18a, though in practice I prefer four of such parts as shown for centralizing the end of the tube 18 within the closed end of the tube 12. The surplus portion of the flanged ends of the inner tube 18 is out away so as to permit free passage of the steam through the inner tube into the outer tube 12, and thence with the water of condensation through the annular space between the inner tube 18 and outer tube l2 back to the condensate chamber 24.

Where the steam passes from the inner tube 18 into the space 34a within the closed end of the jacket or outer heating pipe 12 is the hottest portion of this generator and acts to assist in the 11e-circulation of the water within the tank and also to impart the hottest condition of the water immediately below the hot water outlet, and thereby provide a speedy supply of hot water.

In the operation of my improved hot water generator, the steam is supplied through the valve 45 and pipe 18 to the distant end of the jacket or heatingtube 12 in which it is condensed, with the liberation of the latent heat of the steaminto the water contained in the tank 2, while the condensate from the condensed steam within the jacket pipe 12 is delivered from the condensate chamber` 24 and thence passes throughy the pipe 24a to the steam trap (not shown). Normally, the water circulates over the heating pipes l2 and 18 and continues to re-ciroulate through house pipes 6 and return pipes 6a exterior to the tank 2 and connected with the interior of the same adjacent to the end and hottest portions of

thev heating pipes

12 and 18. The hottest portion of the tank 2 may be connected to the cooler portion thereof by a pipe 5a for the purpose of inducing a recirculation within the tank to build up the heating temperature when the circulation of the hot water through the house pipes is at a minimum. This circulation is automatically maintained until the water within the tank aiTects the thermostatic control means 6b extending into the tank and which by the rising temperature of the water will vcause the steam supply valve 45 to be throttled to reduce the heating eifect of the steam upon the

heating pipes

12 and 18.

A suitable air vent valve 53 and-vacuum breaker valve 54 may be employed as a protection to the hot water generator for `excessive variations in pressure or vacuum, and these elements may be respectively connected by elbow-shaped pipes 51 and 52 `each communicating with the condensate chamber 24 'of the head 8, as more particularly illustrated in Fig; 2.

The tank may also be provided with a hand hole 5r for cleaning purposes, and if arranged near the rear end. of the tank, it may be ern` ployed to permit the entrance of the hand in guiding the projecting guide pin 35 of the pipe 12 into the bracket 36 when assembling the heating section in place within the tank. Furthermore, the tank may be provided with a mud blow-ofi pipe and valve shown at 55, and with a. water relief valve as shown at 6c, of any suitable construction.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable, andwhile lIl have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is= to be understood that I do not restrict myself to the details stated as the same are susceptible of modification in various particulars, without departing from the spirit Vor scope of the invention.

lI claim; i

1. A hot water generator comprising, in combination, a horizontal closed tank provided on its interior with a heating section positioned near the lower portion of the tank and consisting of a pair of inner and outer telescoped tubes arranged to form a return tube heating structure for steam and condensate, means for supplying steam to one end of the inner tube,

means for receiving water of condensation from said tubes and removing it from the generator, said outer tube being closed at its inner end and receiving steam at said end from the inner tube, means within the tank for supporting the inner end of the outer tube, a flanged orifice in one of the heads of the tank and through which the telcscoped heating tubes extend a transverse tube sheet to which the outer end of the outer tube is secured, said tube sheet tting against the flange of the tubular outlet of the tank, a flanged head forming a condensate chamber having drainage means for condensate and to which the inner tube is secured, detachable bolt connections through the several flanges and tube sheet to support the heating tube section in fixed position within the lower portion of the tank, means for supplying cold water to the tank, and an outlet for hot water arranged in the upper portion of the tank and relatively above the juncture where the inner tube supplies steam to the closed end of the outer tube.

2. The invention according to claim 1, wherein the tank is also provided with a hand hole arranged in the wall of the tank at or near the level of the supported end of the closed outer tube.

3. The invention according to claim 1, wherein the tank is also provided with a hand hole arranged in the wall of the tank at or near the level of the supported end of the closed outer tube, and wherein further, the means for supporting the inner end of the outer tube comprises a pin in alinement with the length of the tube and a bracket secured to the tank and having guiding means for the pin, said means being Within reachable distance ythrough the hand hole.

4. The invention according to claim 1, wherein further, an air vent valve and a vacuum breaker valve are respectively secured iny communication with the sides of the condensate chamber of the head.

5. The invention according to claim 1, whereinr further, the tank is provided Vwith re-circulation tubes comprising piping arrangedoutside and below the tank and the heating structure herein.

6. A hot water generator comprising, in cornbination, a horizontal closed tank having a flanged tubular outlet from one end or the tank and close to the bottom thereof and a heating section composed of a pair lof inner and outer tubes arranged in concentric relation having intercommunication at one end within the tank and separated at the other endr outside of the tank and having theouter tube 100 bolted to the tank and the inner tube screwed into a detachable head boted to the flange of the outer tube, saidy tubes being telescoped one with respect to the other.

'7. The invention according to claim 6, wherein 105 further, the hot water pipe from the tank connects with it at its upper portion and the heating section is arranged within the tank adjacent to its bottom and approximately below the connection of the hot water pipe with the upper 110 part of the tank.r

JOSEPH W. CARROLL.