US2003838A - Superheater support - Google Patents

Description

B. SMETH SUPERHEATER SUPPORT Filed March 1, 1933 am pm INVENTQR BY (7 K ATTORN EY Patented June 4, 1935 2,003,838 SUPERHEATER SUPPORT Bert Smith, Teaneck,

N, J., 'assignor .to The Superheater Company, New York, .N. Y.;

Application March 1,

2 Claims.

The invention relates to superheaters of the type comprising tubular superheating elements located in flues of locomotive or similar boilers. It has particular reference to cases of this sort in which there are two tube lengths in a flue, these two lengths being connected by means of a return bend to form a loop. The customary arrangement is to have the two tubes lie in horizontal alinement. The problem has always existed of supporting such a tubular loop in a flue away from the bottom of the flue, and so-called supports have been used for this purpose in the past. Where the construction was such that there were four tubular lengths in a fiue, a perfectly satisfactory support has been used for some time. In the case of there being only two lengths as set forth above, however, the supports proposed heretofore have had serious defects which it is the intention of the present invention to remove.

The invention is illustrated in the single sheet of drawing filed herewith Where Fig. 1 shows a portion of a flue in horizontal central section with portions of the two tubular lengths making up a loop in the flue and a support in position on these two lengths;

Fig. 2 is a section on line 2-2 of Fig. 1;

Fig. 3 is a section on line 3-3 of Fig. 1;

Fig. 4 is an end view of the support before it is applied to the tube lengths;

Figs. 5, 6 and '7 are three views of a modification corresponding respectively to Figs. 1, 2 and 3; and

Figs. 8, 9 and are three views of a second modification, these figures also corresponding respectively to Figs. 1, 2 and 3.

In the preferred form illustrated in Figs. 1 to 4, the support will be seen to be made up of two principal parts. The first or lower of these, designated by the reference numeral I, is of somewhat heavier gauge material than the second or upper one, shown at 2. The portion I is saddleshaped and extends upward between the two tubular lengths 3-3, the curvature of the two halves of the saddle being such that the two branches of this part of the support are in contact throughout their length with the two pipes respectively. The length of each of the curved portions is approximately a third of the circum- 50 ference of one of the two tubular superheater lengths. The lower outer ends of the piece I are extended toward the wall of the flue, this portion being designated by the reference numerals l-4. At the outer ends of the portions 4-4, the part i is bent to form two feet 5-5 which lie in 1933, Serial N01 659,026

contact with the flue in which the support is used.

The second or upper portion 2 of the support comprises two curved halves encircling the parts of the tubes not encircled by the lower part I, the two halves being connected by a short transverse piece lying in contact with the top of the saddle of part i. The outer ends of the part 2 are bent into position to lie side by side with the straight parts 4-4 of the lower part of the support and are connected to them by means of rivets 6-6.

In order to keep the curved portions of the support in intimate contact with the pipe, it is essential that the two portions contacting beween the two pipes be kept clamped together. For this purpose a. tongue I is formed on the lower part of the support, for example by being cut out of the portion projecting at each end beyond the upper constituent part; and after assembly this tongue is bent over as clearly shown in Figs. 1 and 3 so as to lie in close contact with the upper side of the corresponding portion of the saddle-shaped portion of the upper part of the support.

This construction, it will be seen, has the excellent characteristic that all parts are thoroughly protected by being in intimate contact with cooling surfaces. The only portions that are not quite directly cooled are the two lengths held together by the rivets 6-6. These parts, however, are together fairly heavy and will transmit the heat away quickly enough to the cooled parts so that they are adequately cooled.

The supports are preferably shipped in the shape shown in Fig. 4, i. e. with one of the rivets 6 in place. The upper part is sprung open far enough so that the support can be slipped on the two pipes, after which the second rivet is put in place and upset and the tongues I pressed into position.

In the variation of Figs. 5 to 7 the tongues la, la I are formed in much the same Way as in the form first described, but extend through openings lb in the upper part. They are shown, in the form of the figures, as bent outward from the center, but of course could equally well be formed so they would be pressed inwardly in the completed assembly. Except for this variation the form of the support of Figs. 5 to '7 is the same as that of Figs. 1 to 3.

The variations shown in Figs. 8 to 10 likewise relates to the means for keeping the two saddleshaped pieces in contact and thereby to prevent in contact between the two tubes and a wire 8 is inserted and its ends 8a, 8a bent outwardly (or, if preferred, inwardly) thereby locking the two saddles together.

In practicing the invention, it is quite probable that variations from the preciseform described may be made without departing from the true spirit of the invention. Such variations insofar as they are covered by the appended claims are to be regarded as falling Within the scope of the invention.

What I claim is: v p

1. A support for two parallel superheater pipes arranged in a horizontal plane in a flue, comprising two sheet-metal parts which together encircle each of the two pipes contacting with each pipe along its entire circumference, one'of the parts extending around the upper portion of the pipes and entering into the space between the two pipes substantially to said horizontal plane, the other of the two parts extending around the lower portion of the pipes and entering into the space between them to contact the first part, means to secure the contacting portions together comprising two tongues unitary with one of the parts and bent around edges of the other part, the two parts being further secured together at two other points adjacent respectively to the lower outer quarters ofthe pipes, the lower of said parts having its ends extended and bent to form rests to engage the flue.

2. A support in accordance with claim 1, the lower part extending beyond the upper at both ends, said two tongues being formed by cuts extending inwardly from the ends.

BERT SMITH.

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