US1920598A - Heating coil - Google Patents

Description

w. H. SCHIRMER Aug. l, 1933.

' maAfrINer con.

Filed April 9, 1932 v 2 sheets-sheet 1 i f6 WHOLz/Wzef Aug. 1, 1933.

w. H. scHlRMER HEATING COIL Filed April 9, 1932 2 Sheets-Sheet `2 Schi/mer z Lf Z.

I l l l l l l l l 1 l l l l -|4/1.

Patentedl Aug. 1,A 1933 UNITED STATES PATENT OFFICE l' This-invention relates to hot waterv boilers and more particularly to an improved type of heat' ing coil for use in heating water in a boiler.

An object of this invention is to provide anY improved 'heating coil which can be readily mounted in any conventional type of water boiler and which is so constructed that it may be readily removed from or inserted in a boiler without taking the ends of the boiler olf as is necessary in a number of coil constructions.

Another object of this invention is to provide a steam coil for insertion in a boiler which is constructed of non-corrosive metal such as copper or the like so that the coil will not corrode and will, therefore, last as long as, if not 1onger,.than

the boiler.

A still further object of this invention is to provide an improved mounting means for the coil so that the joints of the coil will be disposedy exteriorly of the boiler thereby rendering the repair or replacement of the coil an exceedingly simple matter.

The above and various other objects and advantages of this invention will in part be described in and in part be understood from the following detailed description of the present preferred embodiment, the same being illustrated in the accompanying drawings, wherein:-

Figure 1 is a fragmentary detail side elevation of a boiler having a coil constructed according to the preferred embodiment of this invention mounted therein.

Figure 2 is another form of this invention mounted in a vertical boiler.

Figure 3 is an enlarged longitudinal section partly in detail of the connections for two portions of the coil and showing an enlarged fragmentary section of the boiler.

Figure 4 is a longitudinal sectional view of the cold water inlet connection for the boiler which is shown in fragmentary sectional form.

Figure 5 is an enlarged sectional view taken on the line 5--5 of Figure 2.

Referring to the drawings wherein like numerals of reference designate corresponding parts throughout the several views, the letter B designates a conventional water boiler which has one end or head 10 welded to the cylindrical wall 11 and the other end 13 is riveted, as at 12. This type of boiler construction is conventional and further description thereof .is believed unnecessary. The boiler B is provided with an intake pipe connection which may be attached to a pipe 14 connected to a source of water supply, and this 5 pipe 14 is connected through the medium o f a union I5 te e mpp'Ie I6 which is provided with interior threads 17 and exterior threads 18. The

exterior threads of the nipple 16 engage a ilanged sleeve 19 which is welded or otherwise securedto the cylindrical wall 11 of the boiler B. 60

A curved pipe 20 engages the interior threads 17 of the nipple 16 and is open at the inner end thereof and is disposed within the boiler B. An outlet pipe connection 21 is provided for the boiler B, and as this pipe connection 21 is conventional, 65 further description thereof is believed unnecessary. A heating coil, generally designated as C, is mounted within the boiler B and is adapted to be connected to a source of heating supply, such as steam or the-like. This coil C comprises a pair of substantially -L-shaped pipes 22 and 23 and preferably the pipe 22 comprises the intake pipe and the pipe 23 is the outlet. The short leg 24 of the pipe 22 is extended through the cylindrical wall 11 of the boiler B adjacent one end thereof 75 and as shown in Figure 5, the boiler B' is provided with a flanged sleeve25 which is provided with interior threads and a threaded nipple 26 engages the threads of the sleeve 25, and is disposed about the extended end portion of the short leg 24.

This nipple 26 has a nut portion 27 and a seat 28 against which the end of the short leg 24 is adapted to be pressed and flared by a threaded nipple 29 which has a tapering inner end portion and serves in the capacity of a sealing means for sealing the ared end portion 30 of the pipe 24 on the exterior of the boiler B. This nipple 29 may be connected to any suitable source of heating supply such as steam or the like. By daring the free end of the pipe 24, as shown in Figure 5, the pipe is grounded, and as the pipe 24 is of softer composition than the pipe connections 26 and 29,

a tight joint will be provided, the joint being disposed entirely'outside of the boiler B.

The outlet pipe 23 extends through the cylin- 95 drical wall of the boiler B, as at 31, and the connection of the short leg 32 is similar to the ,connection of the short leg 24 and it is, therefore, believed that further detailed description of this connection is unnecessary. The end portion 10 100 of the boiler B is provided with a threaded sleeve '33 within which a threaded nipple or pipe connection 34 is mounted, and the long leg of the intake pipe member 22 extends through this pipe connection 34. The pipe connection 34 1has threads adjacent each end thereof and intermediate the ends is provided with a nut portion 35. The outer end of the pipe connection 34 is provided with a seat 36 against which the end of the pipe 22 is pressed. A threaded collar 37 enf-ages 110 lpressed against these pipe ends by means of the collar 37 so that these pipe ends will be grounded and will be nared against the seat 36 and the reducingportion 38, thereby providing a seal disposed outside of the tank B. The other end of the U-shaped pipe 39 is connected to the return pipe 23 by means of a Joint structure 40 which is similar to the joint structure for the intake pipe 22 and its connection with one end of the U- shaped pipe 39. y

In Figure 2, there is disclosed a vertical tank B wherein the intake pipe member 22 is shorter than the pipe 23 but I, of course, do not wish to be limited to this construction as the vertical tank B' may have the same type of coil as that disclosed in Figure 1. In Figure 1, the tank B is mounted horizontally. In Figure 2, the U-shaped connecting p ipev39' is provided with an intake` nipple 41 which may be connected to an intake pipe 42 connected to a source of heating supply.

The pipe connections 40' of the U-shaped member 39 are similar to the pipe connection herein before described and disclosed in more detail in Figure 3.

In Figure 2, the pipe 23' is connected to an outlet pipe 43 which is preferably the same -source of outlet as the pipe 44 connected to the pipe 22. In other words, in the disclosure of Figure 2, the steam or heating medium flows in the same direction in each'pipe 22 and 23. 'An intake pipe connection 14 is provided for the tank BIand is located adjacent the lower end of the tank, and a hot water outlet or draw-01T connection 21' is provided adjacent the top of the tank.

It will be noted from the foregoing that the coils C and C herein disclosed may be mounted in any conventional hot water tank or boiler and through the construction of the pipes 22 and 23, the pipes may be inserted within the tanks without the necessity of removing the riveted head 13 o r of mounting the pipes 22 and 23 in the tanks beforev the head 13 is riveted to the end of the tank.

lIn the event the tank B becomes damaged through corrosion or the like, lthe tank can be replaced and the same coil used in the new tank by merely unthreading the pipe connections here- 'inbefore described and -reinserting these pipe 80y connections in the new tank. At the present time, various types of coils are in use which are mounted in hot water vtanks or boilers, but these coils must either be mounted Within the tanks before the tanks are completely built or closed or I where .the coils are mounted in a tank in use, the riveted head of the tank must be taken olf and replaced, requiring a considerable expenditure on the part of the purchaser of the coil, whereas in thedisclosure hereinbefore described, the coil can be readily inserted in a tank by any plumber or steamfitter without in any way aifecting the construction of the tank.

lIt is, of course, understood that various changes and'modifications may be made in the details of 95 construction and design of the above speciiically described embodiment of. this invention without departing from the spirit thereof, such changes and modications being restricted only by the scope of the following claim.

What is claimed isz- A tank coil and sealing means therefor comprising a pipe having unthreaded end portions adapted to extend through and outwardly of a tank wall, a iianged member adapted tob secured to a tank wall, a threaded sleeve loosely engaging about` an end of thepipe and having external threads engaging said flanged member,

a seat formed on the outer end of said sleeve, an

annular threaded member having one portion/110` thereof of lgreater diameter than another portion, said other portion loosely engaging about a second pipe, a material between said two portions constituting a second seat, and annular member having oppositely taperedperipheral portions interposed between said .t o 'seats and the abutting ends of the pipes to s'pread said ends and hold said ends againstthe seats upon inward movement of said angular threaded member. relative.- to the sleeve.'

WILLIAM H. SCHIRMER.

Images