US1642361A - Cylindrical drier - Google Patents

Description

Sept. 13, 1927' C, H. CROWELL cLINDRIcAL DRIER- Sept. 1.3, 1927.

c. H. cRowELL YLINDRICAL DRIER Filedqan.. 1o, 1925' 2 meets-Sheet 2.

. INVENTOR CHARL E5 /l CHOWE/.L

ATTORNEY .l1mm-sepelj'ls';1921. j I 1,642,361

UNITED STATES.. PATENT OFFICE.

l ,cnnusnucnowunorwmxrmgmygngl l l Appunti ma :muri-1o, im. arm n. 1,510;

This invention' relates to driers of the sure Afluid. .A shallow annular pasdrum ty and particularly to the of large sage 5 is therefore` rovided in the periphsize, suc as six feet or more in diameter. eral portion ofthe rier between inner and f Thom lnrannrinra am mivn"huw-uvm:Y nlrnnnr annular malla R '7 t flanges of the heads.' Packing rings 27 which may be of sectional or continuous construction. may then be boltedon over the joints at the sides of the drum.

The inside shell ma be made of steel shrunk onto the heads, ut the outside shell -ispreferably made of a material such as copper, zinc or the like having good heat radiating characteristics, non-corrosive and ossessin all the strength necessary' to withstan the high rassure. The skeletom. ized construction o the drum enables the lining of the inner wall and the covering of the piping with heat insulating material, if that be found desirable, 4and the non corrosive character of the outerwall assures continuance of yefficient heat radiation.

Because of the eiiicient transfer o f heat provided from the drum to the'material under. treatment, .it is only necessary to` provide for escape of the water of zcondensation. Accordingly, one or a number of outlet valves are provided, these consisting in the illustration, in each instance .of a valve normally held closed, but adapted 'to open automatlcally at the lowest point in the revolution of the drum, to drain the purpom. I g y One hub of the drying cylinder 1s shown v water contents. 4

In Figure 3. a preferred construction of such valvesy is illustrated, the same being shown as consisting of a yalve casing or chamber 28 xed to the end of the drum and open to the peripheral steam chamber bya passage 29, said casingcontaining a valve 30 cooperating with a valve seat 31 screwed into the bottom of the casing and opening to an outwardly angled discharge spout 32. The valve is normally held closed -by a spring 33 surrounding the stem 34 of the valve, which stem passes up through a suitable stulling box 35 and-is connected at 36 with a yoke 37 slidably guided in bearings 38 at the 'sides of the valve casing and carrying at the lower end ofthe same, a\roller 39 for cooperation with a track 40. This valve opening track is shown as supported at opposite ends on screw posts 41 which can e turned by worm gears 42 engaged by Worms 43 on shaft 44. This shaft is shown as equipped with a suitable hand wheel 45 conveniently accessible at theront of the machine andin order that thevalve opening tracks at both sides of the machine ia' be simultaneously adjusted, the' shafts are shown as connected to turn in unison. bg bevelgearing 4G and a cross connecting s aft 47.' Y z I The valve opening cams or .tracks 40 are -so shaped as'to open and hold the valves. open for a sullicient time for complete drainage of the condensation and the adjustment Y provided enables the valves being set to close in time to prevent'any loss -of live steam. At each end the tracks ma "De` v` beveled ornclined asl `indicated to insure positive opening and closing of the valves. As shown in Figure 3 the valve casing, as it reaches the lowest point of travel, forms in effect a well to collect the drainage from. the chamber and as the passage 29 is of the full de th of the chamber, the liquid contentsdra iiV out without any obstruction. Only two of 'the-outlet valves areindicated and itis to be understood from this that as many of these may be providedl as 'is found necessary, located at one or both ends of the cylinder and disposed either directly opposite or in stag ered relation.

To prevent the entry of ive steam from interfering with the drainage action, means are shown in the form of a shut-oi valve 49 for closing the entrances to the steam supply pipes 22 as these ap roach and travel through the lower arc o movement.. Where the steam isentered at both hubs, as the illustration, two`of such valves are provided, each shown as having an .arcuate valve face -and sup tionary relation within the ollow-hub by a rod 50 having a head 51 exposed outside 'the end c'ap of the vbearing f or adjustment to' respond equipped with a sprocket gear 52 en by a driving chain 53. The dryin operations may be governed by varying t e speed of rotation, the pressure and the volume of steam admitted. A certain amount of control also is given by re lating the openin of the outlet valves. T e apparatus is qui to these various controls, particularly so because of the fact that the high pressure steam is confined in a thin Vor shallow layer and thereforemost effective to 've u all its heat. Because of the relative y sma l volume of steam carried'and the simple, sturdy construction, 'practically all danger is eliminated. The automatic closing of the steam inlets as they approach the downward arc, prevents live steam from', blowing out with the water of condensation, portion of the but the pressure inthe up cylinder is eiective to ush out all condensation each time one of the valves opens.

Injury of sudden expansion or contraction is avoided in the construction disclosed. The supply pipes with the angular 'ortions therein can yield one way or the ot er and the automatically o nin exhaust valves save the walls of the romin'ury which might otherwise result from sud en'expansion or contraction' following admission or cutting off the high pressure steam.

While I have shown and described and have pointed out in theannexed claims certain novel features of my invention, it will be understood. that various omissions, subatitu'tions` and'changes in thev forms-and details of the device illustrated and in itsoperation may be made by those skilled: in the rtedinstart without departing from' the spirit of my invention.

What is claimed is: 1. A dryin cylinder having a shallow annular cham r for high` ressurelsteam in theperi heral portion of t e same and provided with a valve automatically opening at the lowest point in the travel of the cylinder 'l to 'drainthe condensation from the-shallow peripheral steam chamber and means for .shutting olf supply of steam to the lowerportion of the cylinder during the period that the dirvalve iso l. h i l h-u 2. ryin c in er 'aving vs a ow annular cham ryfor high steam in the peripheral .portion of the same and provided with a valve automatically o nin at the lowest point in the travel of t e cy in der to drain the" condensation from the shallow peripheral steam chamber andadjustable means for regulating the opening` of the drainage valve.

3. A rotary drier comprising end heads, an annular. shell supported on said heads, -anouter annular she Vposed between the two s ells, clam rings engaged about the outer shell and en 'plates secured in position covering the joints beof the hollow hubs and bearings for .the hubs havin steam chambers open tothe same.`

` condensation, said valve .havi

tween the end heads, inner shell, spacer rings,

outershell and clamp rings.

'4. Arotary drier comprisi vwith hollow hubs, a stub sha and 'heads entered `in the-opposed ends of the hollow hubs, closing d 'the' inner ends of the same and'supporting the.- heads in spaced relation, an emular peri heral.. steam chamber carried by tl iel hea andconnected with lthe openportions 'drier havinga 'peripheral steam chamberl provided wlth' a valve for ventin an expose operating member andatrac for -engag-i mentby said memberfadiustably supported inI the lowerarcof travel ofthe drier.

6; A rotary drier .having4 a peripheral steam.. chamber provided withv 'a drainage valve, `adjustablemeans for automatically opening said valve in` the A.rotationpf the drier. live Ito. theperipheral.

achamber and meansifor automatically clossaid as they approach the lower-'arc -o travel in. .the `rotat1 )nv of the v drierhavintg feral chamber4- v svi fa port opening yt the-sid'eof .the same, a valve chest with said port; a valve 'chesband means-for i drier," f including an adjust le. wtlnsa'd abutment.

a 'fa rotary drier. a shallow periph-v l, acer rings intera'shallow periph;

y loperatingsaidvalve in the' through the side of the same, a valve chest in communication with said port, a valve and valve seat in said chest and'means for automatically operating saidvalve in the .rotation of the drier, said valve having a y stem projecting up through the top of the valve chest, a yoke connected with said stem and slidably supported at the side of the chest and an abutment engageable by said yoke in the rotation of the drier.

9.- A rotary drier a shallowv peripheral steam chamber wit a port .opening through the side-of the same, a valve Chest in communication with said port, avalve and valve seat in' said chest and means for automatically operating saidvalve Ain the notation of the drier, said valve having a i stem projecting up through the 'top of the valve chest a yoke connected with -said stem and slidably supported at theo'sde l0f the chest and .an abutment engaable b said yoke in the rotation of .the ier an consisting of a track, the yoke carryinga pivoted roller to ride on said track. I

110.k A rotary' drier having a shallow peripheral steamchamber with 'a port openf i'ngthrough.` the side-.of the same, a valve I i .1n communication with said port, a

:.valve and valve seat in" said chest and means .for automatically operating said valve in they rotation of the drier, said valve chest v a .laterally extending discharge outhaving Aletangled away; from the side ofthe drier toA receive the' e valve f dpots a vvalve 'and'valve seat in said chest an means for automaticall 4o the rotation of je. rier, the valve seat being carried by in the bottomof the valve chest.. y

12'. A` ro -d'rier -pxfovided'with a sha1-j with `said chamber `andjautomaticall openfor shuttin oif the'steam supply to of said period of 4said, valve. 13. A 'er having a 'shallow peripheral big pressure steam chamber,l

steam supplyconnections thereto, a condeu'- sationl dlschargefyalvefconnected with chamber, `means for automaticall .opening saidvalve in the rotation of chamber lasv .and for. automatically shutting.. of the: steam supply 1n the.rotation ofsaida'/y chamber' during the (mea-periodl of said eral "wi a port-opening 14. A Y

peripheral fluid chamber, a holow hub' for sup orting said 'chamber, a. benin for rotate 1y sup orting said hub and aving a Huid cham r communicating with the opening in said hub, supply pipes leading from said hub to said chamber, a vave positioned in said hollow hubfor opening and dosing said pipes by the rotation of said hub, said valve being mounted on said bearing".

In testimony whereof I have hereunto set my hand.

CHARLES H. CROWELL.

Images