US1737756A - Metallic baffle - Google Patents

Description

Dec. 3, 1929.

|. HARTER METALLIC BAFFLE Original Filed June 19. 1925 Patented Dec. 3, 1929 UNITE STATES PATENT OFFICE ISAAC HARTER, OF DONGAN HILLS, NEW YORK, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY METALLIC BAFFLE Application filed June 19, 1925, Serial My present invention relates to baflies for water tube boilers and more particularly to bafl'les which extend parallel to the water tubes, and will be best understood from the following description and the annexed drawings in which Fig. 1 is a front view, partly broken away, showing a row of water tubes and the filling pieces therebetween constituting a baflle; Fig. 2 is a side view of Fig. 1; Fig. 3 is a section along the line 3-3 of Fig. 1; Fig. & is an enlarged section through one of the metallic bafiie elements, and Fig. 5 is a somewhat diagrammatic illustration, on a small scale, showing the disposition of the baflle in relation to a set of tubes of a Stirling boiler.

Like reference characters indicate like parts in the several views.

As is well understood, in certain types of water tube boilers, such, for instance, as Stirlin boilers, bafiles are arranged parallel to the water tubes to direct the flow of the hot gases. Such battles are illustrated at 7 and of Fig. 5, the former extending down from the drum 8 along the front of the bank of water tubes, and the latter extending up from the drum 9 along the rear of the bank.

In the baifle of my present invention, I utilize a row of water tubes as part of the baffle and fill the space between the tubes with metallic baffle elements preferably formed of sheet metal and arranged so that they can readily be placed in position between the tubes with a large surface contacting with the surfaces of the relatively cool water tubes so that the heat will be carried away from the elements and prevent their destruction.

As best shown in Figs. 1, 2 and 3, a plurality of metallic battle elements 2 are placed end to end in the space between each pair of water tubes 1 to form, with the tubes, 2. complete wall or battle.

The body portion 2 of the baffle element or section is bent along its opposite side edges (Fig. 4c), so as to form flanges 3 projecting on one side of the body portion. The flanges 3 are preferably curved inwardly on their outer surfaces, as indicated at 1, on a radius equal to the radius of curvature of the out- No. 38,197. Renewed October 11, 1929.

side of the tubes 1 in connection with which they are to be used. At one or more points, preferably intermediate the ends of the flanges 3, slits are made across these flanges to form tongues or projections 5 that are bent to the other side of the main body of the sheet 2, and these tongues 5 are also preferably curved on the outside thereof, as shown at 6, to conform to the curvature of the tubes with which the baflie elements are to be used. The flanges 3 and tongues 5 are so bent and are so disposed with respect to each other that they form, in eflect, an arc of a circle or the same radius as the outside of the water tubes 1.

The battle sections or elements 2 can be installed simply by springing the tongues 5 inwardly and inserting the elements 2 between the tubes, after which the elements can be slid longitudinally, if desired, to bring the ends of successive elements into contact with each other, thus closing entirely the space between water tubes. The curved surfaces of the elements 2, coming into close contact with the outside of the water tubes over a considerable area, provide a very effective means for transferring the heat from the elements 2 to the tubes 1. By pressing the. tongues 5 against the tubes, the flanges 3 will be drawn tightly against the water tubes.

By my invention, a cheap and effective baflie may be formed, and one which can be readily maintained. It will also be noted that, by reason of the tight fit between the water tubes and baflie elements, these elements will remain in' position to form a baffle, as at 7, whichis not supported from below. By having the metal thin, particularly in the flanges 3, the flanges will conform more readily to the surface of the water tube so as to insure a close contact throughout the area of the flanges when the element is drawn against the water tube by the tongue 5. Preferably, the tongues 5 are positioned near the middle of the body portion 2 so as to exert pressure on the part of the flange at each side of the tongue, though, the same result may be accomplished by providing two yond the same side of tongues on each side edge of the element, one at the top and the other at the bottom.

lVhen it is desired to install the baflie elements along bent portions of the tubes, transverse slits may be made in the ele ments so as to facilitate bending the elements to conform to the bends in the boiler tubes.

I claim 1. A baille element for a water tube boiler comprising a metal member having the greater part of each side edge extending on one side of its main body portion and curved to extend tightly around a water tube, and the remainder of said side edge extending on the opposite side of its main body portion and arranged to engage the water tube to hold said greater portion in contact with the tube.

2. A baille element for a water tube boiler comprising a metal member having its opposite side edges each bent in two dire tions with most of the bent metal projecting bethe main body of the baffle element.

3. A battle for a Water tube boiler comprising a row of water tubes spaced apart and metal elements in the spaces between the tubes and in the plane of the row of tubes, each of said elements having a main body portion and an integral curved flange along each edge of said body portion and fitting snugly against the surface of the adjacent water tube and an integral tongue bent outwardly away from said flange and contacting with the water tube to hold the flange in tight contact with the tube. V

4. A baffle for a water tube boiler comprising a row of water tubes spaced apart and metal elements in the spaces between the tubes and in the plane of the row of tubes, each of said elements having a main body portion and an integral curved flange along each edge of said body portion and fitting snugly against the surface of the adjacent water tube and an integral tongue bent outwardly away from said flange and contacting with the water tubes to hold the flange in tight contact with the tube, said tongue being relatively narrow and said flange being relatively wide.

5. A battle for a water tube boiler comprising a row of water tubes spaced apart and metal elements in the spaces between the tubes and in the plane of the row of tubes, each of said elements havinga main body portion and an integral curved flange along each edge of said body portion and fitting snugly against the surface of the adjacent water tube and an integral tongue bent outwardly away from said flange and contacting with the water tube to hold the flange in tight contact with the tube, said tongue being relatively narrow and positioned between the top and the bottom of the element, with the remainder of the edge of the element formed into a flange.

6. A baffle element comprising a sheet of metal, an edge of said sheet being provided with slits, and a section between adjacent slits being bent outwardly to form means adapted to engage a tube.

7. A battle element comprising a sheet of metal, opposite edges thereof being provided with slits, and sections between said slits being bent outwardly to form means adapted to engage a tube.

8. A baffle element comprising a sheet of metal having an edge portion thereof divided into a plurality of parts longitudinally of the edge, at least one of said parts extending outwardly on one sideof the body portion of the sheet and at least one other part extending outwardly on the other side of said body portion, said outwardly extending parts being adapted to engage a tube.

ISAAC HARTER.

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