US2272863A

US2272863A - Heat exchange tube protector

Info

Publication number: US2272863A
Application number: US364131A
Authority: US
Inventors: Fred M Young
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-11-04
Filing date: 1940-11-04
Publication date: 1942-02-10
Anticipated expiration: 1959-02-10

Description

Fab. 1%, 1942. M, YOUNQ fi zmfiffi HEAT EXCHANGE TUBE PROTECTOR Filed Nov. 4, 1949 wmw roe 5950 M )/0(//Y 6 ATTOBIYL'Y Patented Feb. 10, 1942 UNITED STATES PATENT] OFFICE 1 '7 1.272.863"; Q y

I HEAT EXCHANGE r'unurnorac'ron j I Fred Young, Racine-Wis." I Application November- 4 1e40, Serial No. 364,131

y I 5 Claims 2575-154 The present invention relates to steamradiators haying upper and lower headers-and a number of tubes forming operating connections therebetween and a multiplicity of closely spaced Fig 4 isa sectional view of afurthermodificationr- .Fig. is a further modification of the design shown in Figure '1.

old fashioned cast'radiator of the same heat l transfer capacitylargely because of the fact that a blast'of air-is forced'between the fins."

The heat transfer surface in radiators-of thenear certain tube endsythese tubes are impinged violently by the steam and: they may receive a large percentage of the entering steamand thus be greatly overloadedand expanded difierently Furthermore, foreign from the other tubes.

I .nection IL. The tubeplate of the header is.

Fig. 6 is a view of the'ba file shown in Figure 5 but transverse to this figure.

Fig.;7 is amodification of thedesignshown in Figure :3 adapted for tubes without bushings. Fig. 8 illustrates-a further modificationr-l As thus 'illustrated, in Figures*1.;and 2, the top surface of the header shown is designated byr'eferencecharacter l0 having an inlet condesignated by reference numeral l2 and the tubes by reference numeral I3. In headers of the, class,.the tube ends generally extend slightly ".through their apertures 14, as illustrated.

matter in the steam will impinge the tube ends andthe inner surfaceof thetubesnear theends-H Thus, because of the steam velocity, foreign matter and additional heat and" variations in" a about the same volume of steam thus to equalize expansion and contraction and-heat transfer to thereby increase the capacity of the unit.

An object of the present invention is'toprevent the steam and foreign matter from violently impinging any of the tube surfaces and to' evenlyi distribute the steam into the various tubes.

I accomplish the objects ta providing:

bailies over certain tube ends which will act to receive the impact of *theenteringsteam and foreign matter and to reduce the area of the approach to the tubes so as to equalize the flow class, it is clearly desirable of steam into the tubes whether they are near or a distance from the inlet.

To these and other usefulends, my invention consists of parts, combinations of parts, or their equivalents, and mode of operation, as hereinafter set forth and claimed and shown in the accompanying drawing in which:

Fig. 1 is a fractional vertical section through a conventional radiator inlet header.

Fig. 2 is a top view of the device shown in Figure l with the top of the header removed.

Fig. 3 is a modification of the design shown in Figure 1.

top of the header, as illustrated; Thus it will be --A numberbf bushings l5 are'pressed into the tube ends and expanded in any convenient manner. Most headers hat e the inlets in the seen that certain tubes will be directly'under the inlet and that these tubes will therefore be violently impinged by the entering steam and '25 electrolysis! or chemical also greatly'overloaded. I

I provide baflle plates which in their entireties are designated by reference character A. These baifles comprise preferably discs 20 which are formed integrally with two or more downwardly projecting legs 2|. These legs may be of any desired length, their ends being adapted to rest on tube plate I2 and thus act as spacers between the tubes and members'20. "The desireis to reduce this space, if necessary, fora purpose which will be apparent.

a connecting member 23, member 23 being-pref- -erably spot welded to member 20, the arms being positionedsothey will be snugly'embraced by bushings IS, the lower ends being provided with-outwardlyextending projections 24 which are positioned so they pass under the inner end K 01 the bushing to firmly hold the device into position.

As thus illustrated, it will be seen that member Amay be positioned a suitable distance from the ends of the tubes so as to reduce the area of the space, if necessary. The practice is to reduce the area of this space to less than the area of the tube, assuming that the pressure in the header will be slightly greater near the inlet than at the far ends of the header. Thus member A not only prevents the entering steam from impinging the tubes, but also prevents overloading these tubes.

Under some circumstances, for best results, it may be necessary to position several of the discs say A," from the ends of the tubes and the surrounding discs ft," from the tube ends. In many installations having say 100 tubes, it may be necessary to supply bailies for six or eight tubes. In other installations, particularly if the inlet is near the end of the header of large radiators, more baffles may be needed.

In Figure 3, I illustrate a modification wherein a disc 25 is provided with separate legs 26, their upper ends being bent outwardly at right angles as at 21 and being spot welded to the disc. An offset as at 28 is provided which rests on bushings l as a spacer for the discs. The lower ends of members 25 are offset outwardly as at, to prevent the disc from moving out of the tube by accident.

In Figure 4, I illustrate a modification wherein a tube 30 is flanged as at 3|, this flange being secured to plate 25 by spot welding or otherwise. Member 30 is provided with a number of apertures 32 of a suitable size for reducing the area of the inlet to the tube. I provide an ofiset in tube 30 as at 33 which is adapted to rest on bushing 15. Tube 30 at its lower end is adapted to be pressed into bushings 15 so it will be firmly held into position. The lower end of the tube is flanged inwardly slightly as at 34, thus cooperating with openings 32 to reduce the opening into the tube.

In Figure 5, I illustrate a modification of the design shown in Figure 1 wherein tubes l3 are not provided with bushings but are rolled into their openings boiler tube fashion so as to provide a pressure tight joint. In this design, plate 25 is supported by a U-shaped member formed from a single strip of metal into arms 35-35 and a connecting member 36, the arms being ofiset inwardly as at 37-31 forming a positioning stop. The inner ends of arms 35 are curved inwardly as at 38 so as to facilitate inserting the arms into the tube.

It will be understood that the arms illustrated in Figures 1, 3 and 5 are positioned a considerable distance farther apart at their free ends than the other ends so these arms will be caused to tightly hug either the sleeve or the tube when inserted.

In Figure 6, I illustrate the design shown in- Figure 5 but transverse to this figure.

In Figure 7, I illustrate a further modification somewhat similar to that shown in Figure 3, except that the disc is similar to that shown in Figure 1, the arms 40 however being made in separate pieces, the upper ends of the arms being bent at right angles as at 39 and spot welded or otherwise secured to member 20.

a In Figure 8, I illustrate a baflle plate 40 large enough to cover a number of tubes or all of the tubes, as illustrated in Figure 2, and having holding means similar to that shown in Figure 5 but being spaced in pairs so the holding means will enter two of the outside oppositely positioned tubes. Clearly in this design, three holding means may be supplied so as to fit into every other outside tube.

It will be seen that my baflle plate need not be limited to a single tube and that this plate may be formed as in Figures 1 or 7 having holding means to correspond or it may be fitted with holding means similar to that shown in Figures 3 and 4.

From the foregoing, it will be seen that many minor detail changes may be made without departing from the spirit and scope of the present invention, as recited in the appended claims.

Having thus shown and described my invention, I claim:

1. A device of the class described, comprising a radiator having upper and lower headers and a number of tubes forming operating connections therebetween, an inlet connection in said upper header, plates having holding means positioned over certain tubes which are adjacent said inlet, said holding means adapted to extend into the tubes, means adaptedto determine the distance between said plates and the ends of said tubes.

2. A device of the class described, comprising a radiator having upper and lower headers and a number of tubes forming operating connections therebetween, an inlet connection in said upper header, one or more discs positioned over certain tube ends which are adjacent said inlet and having holding means adapted to extend into their tubes, legs extending from the periphery of said plates adapted to rest on the tube plate to thereby determine the distance between said disc and its tube end. r

3. A device as recited in claim 2 includin said tubes having bushings therein, said holding means having relatively. short projections adapted to engage the inner ends of the bushings to thereby prevent said discs from moving out of position.

4. A device of the class described, comprising a radiator having upper and lower headers and a number of tubes forming operating connections therebetween, bushings in said tube ends, an inlet connection in said upper header, one or more plates having holding means positioned over said tubes which are adjacent said inlet, said holding means adapted to extend into their tubes and be embraced by said bushings and having means to determine the distance between said plate and the ends of said tubes.

5. A device of the class described, comprising a radiator having upper and lower headers and a number of tubes forming operating connections therebetween, an inlet connection in said upper header, one or more individual plates positioned over certain tubes which are adjacent said inlet and having holding means which extend into their tubes, said tubes having inner sleeves at their ends, said holding means comprising two or more arms adapted to yieldingly engage said sleeves and having means adapted to engage the inner and outer ends of said sleeves and hold the plate into position.

FRED M. YOUNG.