Патент USA US2107496код для вставки
Feb. 8, 1938. R, R PABQDIE ‘ 2,107,496 LOUVER CONSTRUCTION FOR COOLING TOWERS \F‘iled Nov. 16, 1,955 I 2 Sheets-Sheet.‘ 1 ' 1o vINVENTOR 29 v Robe/‘ff Paton/fa BY Feb. 8, 1938. R, R PABODIE ’ 2,107,496 LOUVER CONSTRUCTION FOR COOLING TOWERS Filed Nov. 16, 1936 2.5‘ 25 2 Sheets-Sheet 2 26 ‘at?’ 3 / R736 Patented Feb. 8, 1938 2,107,496 UNITED STATES PATENT 2,107,496 LOUVER CONSTRUCTION FOR COOLING TOWERS Robert R. Pabodie, Kansas City, Mo., assignor to J. F. Pritchard & Company, Kansas City, Mo., a corporation of Missouri Application November 16, 1936, Serial No. 111,631 10 Claims. (Cl. 261—109) This invention relates to cooling towers and it’ including slats M arranged in spaced relation particularly to a louver arrangement therefor for and ?xed to transverse cleats l5 extending across preventing loss of liquid being cooled in the tower. and supported by the longitudinal beams £2. The The principal objects of the present invention structure thus described is stabilized by suitable 5 are to provide a louver arrangement which is e?icient in catching moisture driven by air cur rents transversely through the tower without materially obstructing flow of the air; to pro vide a louver arrangement cooperative with sides of the tower to form fines for further reducing loss of moisture because of wind currents; to provide a simple and relatively inexpensive louver construction capable of ready assembly and at tachment to a cooling tower; and to provide a louver construction having a greater total area of passageways for the air currents thereby per mitting maximum air ?ow through the tower. In accomplishing these and other objects of the invention, as hereinafter pointed out, I have 20 provided improved details of structure, the pre ferred forms of which are illustrated in the ac companying drawings, wherein: Fig. 1 is a plan view of the end portions of a tower provided with louver sections embodying the feature of the present invention. Fig. 2 is a fragmentary perspective view through a portion of the louvers taken at one of the catch pans. Fig. 3 is a vertical section through the cooling 30 tower on the line 3—3 of Fig. 1. Fig. 4 is an enlarged horizontal section through a portion of the louvers and adjacent side of the tower, particularly illustrating the arrangement of louver bars. 35 Fig. 5 is a section through one of the pans par~ ticularly illustrating mounting of the louver bars. Referring more in detail to the drawings: ! designates a cooling tower including a foun dation 2 consisting of a substantially rectangular 40 slab 3 supported on the ground and having an annular. wall or curbing d to form a catch basin 5. Formed in the center of the slab is a sump 6 for collecting liquid draining from the tower l. The sump ii includes a wall 8 conforming in 45 shape to the tower l and which connects the slab 3 with the floor 8. The wall 8 provides a support for the legs or posts N3 of the tower which are arranged in pairs and connected at spaced points by transverse beams H extending in superim 50 posed spaced relation across the sump 6. The posts H! are also connected longitudinally of the tower by beams I2 having their ends supported on the transverse beams at points adjacent the posts, as shown in Fig. 3. . -55 Supported on the longitudinal beams are decks transverse cross bracing I‘! as in conventional '5 tower construction. The posts extend above the upper deck and the respective pairs are connected by transverse beams l8 having their ends l9 and 20 projecting beyond the posts and overhanging the slab 3. Carried by the beams I8 is a distributing system including a conduit 23 extending longitudinally of the tower and having depending nozzles 24 directed toward the upper deck. The conduit is also provided with lateral branches 25 having L ‘15 ?ttings 26 carrying similar nozzles 2',’ whereby the liquid to be cooled is distributed over the surface of the upper deck. The liquid, upon reaching the upper deck, spreads over the surface of the deck slats and drips through the spaces therebetween 20 to the slats of the next lower deck and so on down the tower until the water is ?nally collected in the sump 6, the water being gradually cooled by air currents blowing horizontally between the decks and across the path of the descending 25 droplets of liquid. The tower thus described is of conventional design and speci?cally forms no part of the pres ent invention which may be carried out with other arrangements of splash decks than the type illustrated. In cooling towers of this type, air currents blow ing through the spaces between the decks pick up the droplets of liquid and carry them through the opposite side of the tower so that they do not reach the sump, and it is the purpose of the present invention to provide a tower with louvers arranged to allow free passage of air currents necessary in cooling the liquid but which form traps for separating any moisture picked up by the air currents and to effect its return. to the tower to continue its descent toward the sump 6. Located in spaced parallel alignment with each of the tower posts and having their lower ends supported on the slab 3 are louver supporting posts 28 and which have their upper ends con nected with projecting ends l9 and 26 of the transverse beams l8. Extending horizontally of the tower legs at spaced points along the height thereof are hori~ zontal beams 29 for supporting the inner edges 30 of catch pans 3! extending upwardly and out 30 35 40 45 50 wardly at suitable angles to drain liquid caught thereby in the direction of the tower, as later described. The outer edges of the pans are shaped 55 2 10 15 20 25 2,107,496 across to opposite sides of the tower in the direc to provide a series of triangular projections 32 extending outwardly over the slab 3 with their tion of the louvers 42, however, the air currents vertexes 33 terminating substantially over the upon engaging the louver bars, change their di rection before they can pass through'the spaces inner face of the curbings ll. Theprojecting por tions of the pans are supported at the vertexes 45 therebetween. Thev air, upon contacting the thereof by vertical posts 34 located adjacent the louvers 52, gives up the drops of moisture which curbings 4. Fixed to the upper and lower edges collect on the inner faces of the ba?les and gravi of the projections are plates 35 and 3% connected tates 'theredown onto the next catch pan, the by rails 3? having their upper edges projecting battens 45 and lil forming stops to prevent blow~ above and below the respective plates as clearly ing off of any‘of the collected moisture from the , illustrated in Fig. 5. The plates 35 and. 36 thus louvers. Upon reaching the catch pans 3|, the moisture extend in angular relation to the longitudinal direction of the tower and have parallel grooves drains thereacross over the inner edges 30 onto 38 and 39 extending from the inner side edges [iii the next lower deck of the cooling tower so that thereof toward the outer edges t! that engagingly the water tending to escape is returned to con tinue its gravitational ?ow from deck to deck of retain the ends of vertical louver bars A32. The louver bars comprise ?at strips of suflicient the tower. Any of the moisture stopped by the length to extend from the upper plates of one lowermost section of louvers is caught by the pan to the lower plates of the next upper pan slab 3 which slopes in the direction of the sump 6 to return the water thereto. and are of sufficient width so that the inner By providing the VV-arrangement and stag~ edges 43 overlap the outer edges 44 of the adja cent bar whereby direct passage of air currents gered relation of. louver bars, I am able'to pro is prevented in transverse directions relatively to vide for a maximum total passage having great, the tower‘. The spacing between the respective er capacity than the cross-sectional area of the bars form passageways 45, the total areas of spaces between the respective decks, so that while i which are substantially equal to or greater than the'ba?'les provide an effective retard foriany the sectional area between the respective decks moisture'contained in the air currents, they do so as to provide maximum movement of air across the tower and through the ba?ie. Extending longitudinally of the inner and outer 30 faces at the outer edges of the louver bars are battens 46 and 41. The outer battens H are pref erably of larger dimension than the inner bat tens, as shown in Fig. 4. The battens not only 35 reinforce and stiffen the louverbars but provide stops for catching and retaining any drops of moisture that may be carried in the air mov ing therebetween. The moisture, upon being stopped by the baffles, gravitates theredown until 40 the next lower pan is reached, whereupon the moisture runs off the upper plates of the pans and across the pans toward the decks of the tower. In order to close the space between the outer 45 louver bars at the vertex portion of the pans, the posts 34 carry louver plates 48 ?xed to their outer faces and having their side edges extend ing beyond the inner edges of the adjacent louver bars, the edges of the plates 48 being provided with battens 49 and 50 corresponding to the bat tens previously described in connection with the louver bars. . The louver plates carrying the louver bars are preferably connected at their ends by cleats 5| nailed or otherwise attached to the under sides thereof, as shown in Fig. 3,‘ and by the dotted lines in Fig. 4. The juncture of the louvers at the corners of the tower are closed by not act to retard or choke the volume of air cur rents that may be moved between the decks. ' Attention is also directed to‘ the V-shaped ar rangement of the ba?les which form flues where by the air currents are caused to move upwardly thereby further reducing their velocity and caus ing gravitational separation of entrained rnois ture. ; 03 Cl a From the foregoing, it is obvious that I' have provided a louver arrangement'which is most effective in separating moisture but which does not materially retard or interfere with movement of air currents across the cooling tower. Due to .40 the slotted arrangement of the plates carried by their respective‘ catch pans, the louvers are read ily assembled and rigidly retained in position so that they are not likely to be broken down in case of excessive wind velocities. :45 What I claim and desire to secure by Letters Patent is: 7 7 ~ 1. In combination with a cooling tower, a plu rality of superimposed catch pans having tri angular shaped projections, means supporting the catch pans at the sides of the tower, louver bars supported along the marginal edges of the triangular shaped projections and arranged in spaced parallel relation, and battens ?xed to the inner and outer edges of the bars. 2. In combination with a cooling tower, a plu-_ rality of superimposed catch pans having angu larly extending outer edges, plates ?xed to the ?at plates 52 as shown in Fig. 1. upper and lower surfaces of the pans at said The operation of a tower constructed and as sembled as described is as follows: angular edges and provided with parallel spaced 60 A liquid to be cooled, such as water, is deliv ered to the rows of nozzles 24 and 2'! through the pipe 23 for substantially uniform distribution 65 over the slats of the upper deck. The drops of water upon reaching the slats spread thereover and drip from the sides thereof through the spaces onto the slats of the next lower deck and grooves, and louver bars having their upper and lower ends supported in the grooves of said plates and having the inner side edge of one louver bar overlapping the opposite side edge of the next adjacent louver bar. ‘ so on until the water reaches the sump 6. During .larly extending outer edges, plates ?xed to the 70 travel of the droplets of water from one deck to upper and lower surfaces of 7 the pans at said the next, air currents moving transversely be tween the decks cool the water incidental to ac tual contact therewith and by evaporation. At times the air currents are at such velocity that 75 they pick up drops of water and carry them ; 65 3. In combination with a cooling tower, a plu rality of superimposed catch pans having angu- ' angular edges and provided with parallel spaced 770 grooves, louver bars having their upper and lower endssupported in the grooves of said plates and having the inner side edge of one bar overlapping the opposite side edge of the next adjacent bar, _.-75 2,107,496 3 and water stops secured to the inner and outer_ overlapping the opposite side edge of the next adjacent louver bar. surfaces of the louver bars. ‘ 4. In combination with a cooling tower, a plu 8. In combination with a cooling tower, a plu larly extending outer edges, plates ?xed to the rality of superimposed catch pans having angu larly extending outer edges, plates ?xed to the upper and lower surfaces of the pans at said upper and lower surfaces of the pans at said ’ , rality of superimposed catch pans having angu angular edges and provided with parallel spaced angular edges and provided with parallel spaced grooves, louver bars having their upper and lower ends supported in the grooves of said plates and grooves, louver bars having upper and lower ends supported in the grooves of said plates and hav ing the inner side edge of one bar overlapping the 10 opposite side edge of the next adjacent bar, and guards ?xed to the outer edges of the pans in overlapping relation with the plates. 9. In combination with a cooling tower, a plu rality of superimposed catch pans having angu 15 '10 having the inner side edge of one louver bar over lapping the opposite side edge of the next adja cent louver bar, and batten strips ?xed to the inner and outer faces at the outer edges of the respective louver bars. 5. In combination with a ‘cooling tower, a plu rality of superimposed catch pans having tri ' angular shaped projections, means supporting the catch pans at the sides of the tower, and louver bars supported along the marginal edges of the triangular shaped projections and ar ranged in spaced parallel relation with the sides of the cooling tower. 6. In combination with a cooling tower, a plu rality of superimposed catch pans having tri ‘ angular shaped projections, means supporting the catch pans at the sides of the tower, louver bars supported along the marginal edges of the triangular shaped projections and arranged in spaced parallel relation with the sides of the cool ing tower, and battens ?xed to the outer edges of the bars. 7. In combination with a cooling tower, a plu rality of superimposed catch pans arranged to slope, in the direction of the cooling tower and having angularly extending outer edges, plates ?xed to the upper and lower surfaces of the pans at said angular edges, and louver bars having their upper and lower ends ?xed to said plates and having the inner side edge of one louver bar larly extending outer edges, posts spacing the pans at the juncture of said outer edges of the pan, plates ?xed to the upper and lower surfaces of the pans at said angular edges and provided with parallel spaced grooves, louver bars sup ported in parallel relation with the posts and having their upper and lower ends supported in the grooves of said plates and having the inner side edge of one bar overlapping the opposite side edge of the next adjacent bar, batten strips 25 ?xed to the inner and outer faces at the outer edges of the respective bars, and plates secured to the posts and having projecting outer edges cooperating with the louver bars to divert air cur 30 rents blowing through the tower. 10. In combination with a cooling tower, a plu rality of superimposed catch pans in the form of a series of triangular shaped projections extend ing from the sides of the tower, and louver bars supported'between the catch pans and arranged at the outer edges thereof to form substantially triangular shaped ?ues- between the pans. ROBERT R. PABODIE.