US2646792A - Horizontally movable damper - Google Patents

Description

July 28, 1953 c. HENNIG HORIZONTALLY MovABLE DAMPER 2 Sheets-Sheet l Filed Jan. 17, 1951 INVENTOR Charles Hennig ATTORNEY July 28, 1953 C. HENNIG HORIZONTALLY MOVABLE DAMPER 2 sheets-sheet 2 Filed Jan. 17, 1951 1111/1111111 Il .Il J l vllllllll INVENTOR Charles Hennig W ATTORNEY Patented July 28, 1953 HORIZONTALLY MOVABLE DAMPER Charles Hennig, Freeport, N. Y., assignor to Morse Boulger Destructor Company, New York, N. Y., a corporation of Delaware Application January 17, 1951, Serial No; 206,369

6 Claims.

This invention relates generally to furnaces and in particular to damper structures therefor. The invention has special applicability to incinerators of the type disclosed in U. S. Patent No.'2,5l4,657, issued Julyk 11, 1950.`

The general object of the invention is to provide a novel, eiiicient, and easily installed and operated damper structure for the flue of a large furnace.

Herein a furnace of the incinerator type mentioned above, generally referred to as a destruc- 1 tor, has been adopted for the p-urposes of illustrating the applicability ofthe invention. Furnace installations of this class are commonly Very massive, and the flue is accordingly of large cross section, requiring a damper of such rsize vand weight that considerations of space and of handling are of extreme importance.

As a damper for the flue of a furnace lof this class may be six or more feet in height, installation of the damper for vertical movement may even require breaking through the ceiling of the furnace room in which the destructor stands. This has been done heretofore in many such in stallations; but it is costly and otherwise undesirable. Thus an-object of the present invention is to provide a novel structure wherein a damper may be operated horizontally so that extraordinary Vertical range is unnecessary. Further the structure of the present invention obviatesy the employment of elevator machinery usually required to lift a heavy damper, for herein the damper always remains at the same level.

Another object is to provide a structure which may form a horizontal section of the ue of a destructor or other furnace, said section having a bay extending therefrom and a trackvextendn ing across said section and into said bay, whereby the damper may be rollably mounted on said track and readily rolled back and forth between open and closed positions. Thus the effort required to open and close vthe damper is merely that necessary to roll it, such effort being obviously much less than required to raise it in the usual manner. Further the structure utilizes spaceat the level of the ue and thereby avoids any cutting' through of a furnace room ceiling.

Where a heavy damper is merely to be rolled it will be plain that it may be opened and closed by manually operable means, and elevating machinery need not form a part of the furnace installation.

Another object of the invention is to provide such a structure having simple means for manual operation whereby an attendant may readily ad- 2 just the damper by pulling on one limb or the other of a catenary hanging conveniently v'alcove the furnace roomfloor.

These and other objects ofthe invention will be more fully understood from the following description and from the drawings, in which:

Fig. 1 is a side elevation of the structureembodying the invention;

Fig. 2 is a rear elevation;

Fig. 3 is a plan view;

Fig. 4 is the section 4-4 of Fig. 2;

Fig. 5 is an elevation of that side of the structure opposite to the side seen in Figi;

Fig. 6 is the section 6 6 of Fig. 2; and

Fig. 7 is the section 7 7 of Fig. 2.

In Figs. l through 7, which relate specifically to the damper structure, the only portion of the destructor vseen is an indication, in dotted lines, of the outline of the flue which the damper structure serves. Y

Referring now to the drawings in which like reference characters denote-similar parts, the damper apparatus comprises a box, as best seen in Figs. 2 and 3, having two portions, 35 to the left in these figures, and 3S to the right. Portion 35 is actually the terminal section of ilue Il of the destructor and joins with the chimney of a building in which the destructor is installed. Portion 3S provides a bay protruding from the side of portion 35 and is adapted to house the damper 3'! whenvthe latter is in opened position. The damper is shown in closed (solid lines) and in opened (dotted lines) positions in Fig. 2.

The entire structure is supported'by upright channels 33, 39, lil) and 4l (best seen in Fig. 3), mounted on a floor 42. g

Portion 35 of the boX is essentially a short conduit of rectangular cross section, as best seen in Fig. 2. The front of this conduit connects with the rear of flue Il, and-the rear of the conduit with the entrance to the chimney of the furnace.

That side wall of portion 35 to the left in Figs. 2 and 3 is a plate 43; the side wall to the right comprises two plates, 54 and 55, as best seen in Figs. 3 and 5, the plates being separated to provide a doorway it between the two portions of the box through which the damper may be moved. Plate 43 is secured by suitable means, such as rivets el to the web of upright channel 38 (Fig. 1). Plate 44 is secured,v as by rivets 48, to the web of upright channel 39; and plate 45 is secured, asby rivets 49, to the web of upright rchannel lll (Figs. 3 and 6). Portion 35 is provided with a floor plate 5t (Fig. 2) which n .i is connected to the lower edge of plate 43 by an angle l and to the lower edges of plates 44 and #l5 by a similar angle 52. The side wall plates 43, 44 and 55 are reinforced against buckling strains by angles 53, 54 and 55; and the door plate is reinforced by angles 56. Angles 54, eil and relating to side wall plates 44 and i5 are interrupted at doorway 'd (Fig. 6).

Portion 36 of the box is a bay or envelope `for receiving the damper when the latter is in opened position as shown in dotted lines in Fig, 2. The front and rear walls of this portion comprise plates 5l and 58 respectively. The youter edge of each plate is suitably secured to `a liange of upright channel 4l. See Figs. 2, 3 and 5. The inner edges of the plates "il and 58, where the two portions of the 'ocx are joined, are respectively secured as by rivets to a flange or" upright channel 39, and to a flange of upright channel 4E (Figs. 3 and 5). A roof for portion 3S of the box is provided in the .form of a .horizontal channel s3 to the iianges or which the upper edges or the plates El 53 are suitably secured. lSee 2. -A bottom Vfor the same portion of the box is provided by another channel $4 to the flanges oi" which the lower edges oi the plates 5l and 58 are secured. Channels S3 and Gli extend from upright channel Ai to channels 59 and llt, as shown. Channel il seals the outer end of portion 35, so this por-tion is everywhere sealed except at doorway l5 communicating with portion 35.

At the upper edges of plates 133, s and d5 are two angles 65. A channel @E bridges portion 35 of the box transversely, as best shown in Figs. 2 and 3, and is aligned. with channel S3 (see Fig. 3, particularly). The ends of channel are supported -by angles E5 and one end is rigidly connected to channel @3 by means of a tie 5l (Figs. 2 and 3). The tie El is a short section lof channel stock, and serves also as `a harige',

like hangers 63, S3 and le, for a trolley system described below.

Fig. 7 is the section 'iL-'i of Fig. 2 and is considerably venlarged to show structural details oi part ci the trolley system, which comprises, in part, a pair of opposed channels il and l2 which entend from hanger 513 to hanger 'it and are secured to the three hangers and the tie El. Supported by and between channels ll and 'l2 is trolley track member '53, a cross section of whif11o is seen in Fie. '7.

Rollaloly mounted within the track member 'i3 are four-wheeled trolleys lil and i5 (see Figs. 2 and 3) Two wheels of each trolley are mounted on one side of the track member, and the other two wheels thereof on the other side of the member (Fig. 7). From each trolley depends, between the sides of the track member and the channels 'il and l2, a bolt. The bolt relating to trolley 'Ell is designated le; that relating to trolley le is designated ll. A narrow plate 'i8 extends between bolts "i5 and l? and is suitably secured thereto by -means of nuts l. Mounted on the plate E3 between bolts l and 'il and secured thereto by nuts Si) are two hook bolts Si and El?. The damper is provided with straps 83 and Se at its upper corners, and the damper is suspended from the hook bolts and the trolleys by engagement of hook bolt 8i by strap 83 and by engagement of hook bolt 82 by strap 84, as best seen in Fig. 2.

Rotatably mounted on channel 55 is a pocketed sheave 85; and similarly mounted ron the outer end of portion 35 of the box is a like sheave 85.

4 It will be noted on Fig. 3 that channel 65 is slotted to accommodate sheave 65, and that channel 63 is slotted to accommodate sheave Se. Attached to plate 'i8 at 8l is a chain Se which passes around sheave 35, extends to and around sheave 8S and back to the plate 'i8 at its ends 8l and 89.

The shaft 9i! of sheave 86 is extended forwardly, as shown in Fig. and also mounted on this shaft in iront of portion of box, is another and larger sheave 9 i. Mounted on she ve Si is an endless chain 92 (Figs. 2 and 3), the catenary 83 of which may be conveniently utilized in usual manner to rotate the sheaves and se .move the trolley and damper back and forth from one portion oi the box to the other, as shown in Fig. 2. Viiccordinely the damper door 3l may be readily moved to close or to open the nue completely or to any desired adjusted position between `fully closed and fully open position.

The terms and expressions which have been employed herein are used terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalent of the features shown and described or portions thereof, but it is recognized that various niodications are possible within the scope of invention claimed.

What lis claimed is:

l. In a iue, an enclosed bay to the side of l nue, a doorway between said flue and bay, a trolley track mounted in and enclosed by said flue and bay and extending through said doorway, a plurality of wheeled trolleys mounted on said track, a bolt depending from each of said trolleys, an elongate plate secured to said bolts, a damper suspended from said plate, and means for rolling said trolleys on said track, including a iirst grooved sheave rotatably mounted in said iiue and a second grooved sheave rotatably mounted in said bay, and a chain trained from said trolley over both sheaves and having one or its ends s cured to one end of said plate and its other end to the other end of said plate back to said trolley, links of said chain. being received in the grooves of said sheaves, `and mechanism for rotating said second. sheave.

2. in a furnace flue, a li rizontal section having an enclosed bay extending from one side thereof; a trolley track extending across said section and into said bay; a trolley mechanism rollably mounted on said track; a damper door suspended from said trolley mechanism; a iirst sheave mounted on section and a second sheave mounted on said bay; said trolley inecha nism including two spaced apart sets or" wheels each set having a bolt depending therefrom, an elongate plate secured to the lower ends of bolts and providing means on which to door; a chain extending from one end of plate over both sheaves and back to the other of said plate; and means for rotating one of s sheaves whereby said chain is driven to eiiect movement o said trolley mechanism on said track to move said damper door to open and to closed .position in said flue.

3. In a furnace flue, a horizontal section havu ing an enclosed bay extending from one side thereof and having a doorway into said enclosed bay; a trolley track extending across said and into said bay and enclosed therein; a trolley rollably mounted on said track; a damper door suspended from said trolley; a first sheave mounted on said section and a second sheave mounted on said bay; a chain extending from said trolley over both sheaves and back to said trolley; and means for rotating one of said sheaves whereby said chain is driven to eiect movement of said trolley to move said damper to open and to closed position in said flue, said means comprising a third sheave coaxial with said second sheave and adapted to rotate therewith, and an endless chain mounted on said third sheave for manual actuation of said third sheave.

4. In a flue defined by two vertical and two horizontal Walls; a damper-door housing eX- tending laterally at right angles to said Hue and having side walls, and a top, a bottom and an end wall, an open end opposite said end wall, a passageway in one of said vertical walls of said ilue, the ends of said side, top and bottom walls of said housing being connected to said one of said vertical i-lue walls so that said open end is in registry with said passageway, thus providing a doorway for a damper door between the interior of said housing and said flue, a xedly secured horizontal track crosswise of said flue and extending through said doorway into said housing, a plurality of wheeled trolleys having wheels rollable on said track, damper door suspending members depending from said wheeled trolleys, a damper door suspended on said members and movable through said doorway, a sheave mounted for rotation in said flue adjacent one end of said track, a sheave mounted for rotation in said housing adjacent the other end of said track, a chain trained over said sheaves and secured to said damper door, and operative upon rotation of one of said sheaves in one direction to move said trolleys along said track thereby carrying said damper door through said doorway into said flue and in the other direction to move said trolleys in the opposite direction along said track thereby carrying said damper door through said doorway into said housing, and means for rotating one of said sheaves.

5. In a flue deiined by two vertical and two horizontal walls; a damper-door housing eX- tending laterally at right angles to said ue and having side walls, and a top, a bottom and an end wall, an open end opposite said end wall, a passageway in one of said vertical walls of said flue, the ends of said side, top and bottom walls of said housing being connected to the vertical ue wall which has said passageway so that the open end is in registry with said passageway, thus providing a doorway for a damper door between the interior of said housing and said nue, a xedly secured horizontal track crosswise of said flue and extending through said doorway into said housing, a plurality of wheeled trolleys having wheels rollable on said track, a bolt depending from each of said wheeled trolleys, a narrow plate secured to the lower ends of said bolts, a damper door suspended from said plate and movable through said doorway, a rotatable sheave mounted for rotation adjacent each end of said track, a chain trained over said sheaves and having its ends secured to said plate, whereby upon rotation of one of said sheaves in one direction said trolleys roll along said track and carry said damper door through said door- CII way into said flue and upon rotation of that sheave in the opposite direction said trolleys roll along said track in said opposite direction and carry said damper door through said doorway into said housing, and means including a third sheave and manually operated means for rotating one of said rst mentioned sheaves in the other direction to move said trolleys in the opposite direction along said track thereby carrying said damper door through said doorway into said housing.

6. In a flue defined by two vertical and two horizontal walls; a damper-door housing eX- tending laterally at right angles to said iiue and having vertical side walls, and a top, a bottom and an end wall and an open end opposite said end wall, a passageway in one of said vertical walls of said flue, the ends of said side, top and bottom walls of said housing being connected to the vertical flue wall which has said passageway with its open end in registry with said passageway, thus providing a doorway for a damper door between the interior of said housing and said flue, a fixedly secured horizontal track within and crosswise of said iiue and extending through said doorway into said housing adjacent the top wall of said housing, a plurality of wheeled trolleys having wheels rollable on said track, a bolt depending from each of said wheeled trolleys, a narrow plate secured to the lower ends of said bolts, damper-door hangers depending from said plate, a damper door movable through said doorway, upwardly extending reinforcing straps secured to said door and suspended from said hangers, a rst sheave mounted for rotation in said ue adjacent one end of said track, a second sheave having a shaft extending beyond a side wall of said housing and mounted for rotation in said housing adjacent the other end of said track, a chain trained over said sheaves and secured to said plate and operative upon rotation of one of Said sheaves in one direction to move said trolleys along said track thereby carrying said damper door through said doorway into said flue and in the other direction to move said trolleys in the opposite direction along said track thereby carrying said damper door through said doorway into said housing, a third sheave mounted on said shaft outside of said housing, and a chain accessible for manual operation trained over said third sheave for rotating said third sheave thereby to move said damper door to open and to closed positions.

CHARLES HENNIG.

References Cited in the ille of this patent UNITED STATES PATENTS Number Name Date 164,311 Little June 8, 1875 610,076 McClure Aug. 30, 1898 620,006 Williams Feb. 21, 1899 1,849,022 McLimans Mar. 8, 1932 FOREIGN PATENTS Number Country Date 4,565 Great Britain Apr. 1, 1886

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