US1300730A - Barking-drum. - Google Patents

Description

E. HUTCHINS.

BARKING DRUM.

APPLICATION FILED MAR. 26, 1915. 1,300,730,, Patented Apr. 15,1919.

3 SHEETS-SHEET I.

E. HUTCHINS.

BARKING DRUM. APPLICATION FILED MAR. 26. 1915.

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BHUTCHINS. BARKINGDRUM.

APPLlCATlON FILED MAR. 26.1915- 7 1,300,730, Patented Apr. 15, 1919.

3 SHEETSSHEET 3.

INLET nrran states I Parana onnro.

IEDVVAZRJ.) HUTGHIN'S, OF MONTCLAIR, NEW JERSEY, ASSIGNOR T0 INTERNATIONAL PAPER COMPANY, A CORPORATION OF NEW YORK.

EARRING-DRUM.

Specification of Letters Patent. Patented Apr. 15, 1919.

Application filed March 26, 1915. Serial No. 1 7,102.

at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Barking- Drums, of which the followingis a specification, reference being had therein to the accompanying drawing.

This invention relates to means for thelLI'BBJtIIlBIl'D of wood, in the conversion of the same into pulpfor use in the manufacture of paper, and it has reference more particularly to that stage of the operation in which the bark is removed from the wood. .For this purpose it is the common practice to employ a rotary dru-m known as a barking drum, inwhich chunksof wood are placed, the impact of the chunks against each other and their attrition, due to the rotary motion of' the drum, acting to loosen and detach the.

bark, which escapes through openings in the drum, while the bark-freed Wood is discharged separately therefrom. Further, it is the common practice to partially submerge the drum in atank of water, so that the water will be mingled with the wood in the drum and facilitate the barking operatlon.

My invention consists of various improvements in devices of this character, which improvements are directed more particularly to the form and construction of the drum; to the manner of mounting the same.

in relation to the tank; to the means for supplying the wood and water to the drum to the end that the operation may be continuous and without interruption;-to the manner of feeding the wood to the drum; to the form of the tank and its relation to the receiving and discharge ends of the drum; to the means for removing the bark from the tank; and to various. otherfeatures of construction, which will be pointed out in the specification.

In the accompanying drawings I have illustrated my invention in one form by way of example, but it will be manifest that the same may be variously changed and modified by the skilled mechanic without departing from the spirit of the invention; and further it will be understood that the invention is not limited to any particular form or construction of the parts except in so far as such limitations are specified in theclaims.

In the accompanying drawings:

Figure 1 is a top plan view of a barking drum having my invention embodied therein.

Fig. 2 is a vertical longitudinal sectional elevation on the line aa.

Fig. 3 .is a transverse sectional elevation on the line bb of Fig. 1.

Fig. 4 is an elevation of the receiving, end of the drum on an enlarged scale.

Figl 5 is an elevation of the discharge end of the drumon an enlarged scale.

Fig. 6 is a longitudinal central section through the drum showing the retarding members therein.

Fig. 7 is a fragmentary sectional elevation through the receiving end of the drum and the adjacent wall of the tank showing the'water-tight joint between the two.

Fig. 8 is a sectional elevation on the line c c of Fig. 3, showing the water-tight joint between the tank wall and the discharge end of the drum.

Referring to the drawings:

1 represents a horizontal rotary cylindrical drum open at two ends so that the wood to be barked may be introduced into its receiving end and delivered from its discharge end. This drum which may be of any suitable and appropriate material is in the present instance imperforate for the main portion of its length, While for the remainder of its length adjacent its discharge end it is provided with circumferentially extending slots 1 through which the bark,

branch 3*, a vertical paddle wheel 5 being" mounted for rotation in the longitudinal portion of the tank to produce a circulation of the water through the drum and tank.

The drum is so supported that it may be rotated about its longitudinal central axis.- In the present instance the supports comprise two, pairs of supporting rolls 6,

mounted in suitable bearings sustained by a ,the adjacent parts, and therefore there will be no liability or danger of rust or corrosion of the parts. Rotary motion may be imparted to the drum in any well known and appropriate manner and from any suitable source of power. In the present instance I employ an electric motor 9, sustained by a platform 10 extending over the longitudinal portion .of the tank, which motoris belted to a pulley 11 carried by a shaft 12 journaled in bearings on the platform 10. The shaft has fixed to .it a pinion 13 meshing with a gear 14 on a counter shaft 15 mounted in bearings n the platform, which shaft 15 has fixed to it a pinion l6 meshing with a gear ring 17 fixed to and encircling the drum. By this system of gearing, the motor is speeded down so as to impart to the drum a comparatively slow rotary motion.

At the receiving end of the drum is an upright frame Work 18, having fixedto its inner side a vertical plate 19 which extends across the open end of the drum, and is provided in its lower portion with perforations or holes 20, as shown in Fig. l. These holes are in such position that water may flow therethrough and into the drum from the lateral branch 2 of the tank, the latter being formed with a mouth 21 which is seated around the perforated portion of the plate 19 so that the water from the branch of the tank will flow through themouth and the perforations in the plate, and will enter the lower portion of the drum, as the latter is rotated with its receiving end in proximity to the plate. i

The mouth of the tank is ,formed with a curved shoulder 22, and the end of the drum is formed with an annular shoulder 23, which shoulders are arranged adjacent each other and in axial alinement, a fixed packing strip 24 being sustained by the frame work,

and bearing against the said shoulders so as to form a water tight joint between them as shown in Fig. 7. In the rotation of the drum, the annular shoulder 23 moves in close frictional contact with the packing strip and the latter effectually prevents the escape of the'water from between the mouth 21 and end of the drum, so that the water cannot reach the supporting rolls 6 on which the drum is rotatably sustained and adjacent parts.

The lateral branch 3 of the tank is provided with an outer wall 25 and an inner wall 26, which latter is formed with a curved seat 27 in which the drum extends, so

that the slotted portion of the drum will be shown clearly in Fig. 8. In the rotation of the drum, the annular shoulder 27 b thereon moves in close frictional contact with the packing strip and the latter seats closely against the external surfaceof the shoulder 27 so that the joint thus formed will prevent such water as may find its way over the curved edge of the tank, from reaching the tank-supporting rolls 6.

. From the construction described, it will be noted that the "tank being supplied with water up'to the level indicated in Figs. 2 and 3, it will flow into and occupy a. like level in the drum, the effect being to submerge the lower portion of the drum, without the objectionable condition which has heretofore existed of the water contacting with the rotary supports for the drum, in the present instance the journals of the supporting rolls 6 and adjacent parts. 1

The paddle wheel '5, before alluded to, is rotated in such direction, (as indicated by the arrow in Fig. 2) that a circulation of the water will be produced in the tank toward the receiving end of the drum and in the drum in a direction from the receiving to the discharge end. The paddle wheel may be driven in any suitable and appropriate manner, in the present instance it being provided with a pulley 29 belted to a pulley 30 on a horizontal transverse shaft 31 mounted in hearings on the platform 10. The shaft is provided with a bevel gear 32 driven by a bevel pinion 33 on the end of the shaft 12 before alluded to.

tents of the drum will gradually advance toward its discharge end, the bark escaping laterally through the slots near the end of the drum, while the bark-freed wood is de livered from the end of the drum, the wood and bark entering the lateral branch 3 of the tank. During thisaction a constant circulation of the water is maintained in the lower portion of the drum, the water entering the receiving end from the lateral branch 2- of the tank, whence it will flow through the lower portion of the drum and will escape with the bark and bark-freed wood. into the lateral branch 3 of the tank.

I propose to feed the wood continuously into the receiving end of the drum so that the. barking operation may be carried on without interruption. For this purpose I prefer to employ a supply conveyer in the form of a trough 34 leading upwardly to a point above the framelS. Arranged in the bottom of the trough is an endless conveyer chain 34 provided with suitable cleats or lugs to engage the chunks of wood, the upper end of the chain passing around a sprocket wheel 35 mounted in suitable bearings sustained in the frame .18. This conveyer delivers into a transversely extending trough 36 sustained above the frame 18 and inclined at its bottom so as. to deliver into a feed hopper 37. The feed hopper 37 is mounted fixedly in. the frame 18 and has its inner de livery end in position to discharge into the drum at the down-going side of the same, the hopper being so inclined from the vertical that the wood will enter the drum in the general direction of the movement of the mass of wood therein; whereby'there will be no' clogged at danger of the chunks becoming the delivery end of the hopper. This feeding hopper is of general rectangular form in cross section, its delivery end being seated in an opening in the vertical plate 19, and the wood delivered to the trough 36 by the supply conveyer, will be directed by said trough into the hopper, and from the hopper will enter the down-going side of the drum in a direction inclined forwardly and transversely.

i The bark escaping through the slotted end of the drum will accumulate on the tank bottom, and in order that it may be preventedfrom accumulating in such quantities as to interfere with the operation of the drum, and in order that the bark may be recovered for use, I propose to provide means for continuously removing the bark from the tank and discharging the same therefrom. This operation is efi'ected as shown more particularly in Fig. .3, where" it will be seen that an endless conveyer device is arranged to scrape over the bottom of the tank and positively emove and deliver the bark therefrom. This scraper device consists of two parallel endless chains 38 connected at intervals by transverse scraper blades 39, which chains pass over upper guiding sprocket wheels 40, lower sprocket wheels .41, and an intermediate. side sprocket wheel 42, thesaid sprocket wheels being so disposed that I be delivered over the side of the tank. The

upper guide-sprocket wheels are journaled in an upright frame structure 43 at the discharge end of the drum. The lower sprockets are mounted in suitable bearings at the bottom of the lateral branch of the tank, while the side sprocket is mounted in bear ings on the platform 10. The conveyer device is operated continuously in any suitable manner and from any suitable source of power.

The point of the discharge of the bark-.

freed wood from the drum may be varied, in order that the passage of the wood through the drum may be made slower or faster according to the conditions encount'ered in practice. For certain kinds of wood, a greater period of time is required for the removal of the bark, while with other kinds of wood the bark is freed more speedily. By raising or lowering the discharge opening, the passage of the wood through the drum may be correspondingly retarded or hastened. This object may be efiected by providing a cover plate 45 fixed to the frame structure 43, so that the plate will lie close to the open end of the drum, as shown in Fig. 5.. A vertical opening 46 is formed in the plate 45, the sides of which opening are provided with guideways 47, in which is mounted to move up and down, a slide 48 adapted to be moved vertically in its guide ways, and may be positioned at different points in the vertical height of the drum, so as to correspondingly vary the position of the discharge opening in a vertical direction, and in this manner control the passage of the wood through the drum in the barking operation.

The spout 50 discharges onto an inclined plate 60 sustained by the frame work 43, which directs the wood against a deflector plate 61, which in turn deflects it inwardly and downwardly into the tank. As the wood enters the tank, it may be directed by a workman standing on a platform 10, with the aid of a pole onto a conveying device 62 extending down into the water, by which conveying device it is carried away.

In order that the chunks of wood which are not completely freed of the bark may be returned to the drum for further operation, I provide a return conveyer 63 consisting of an endless chain with conveyer cleats or lugs, fixed thereto at intervals and traveling in the bottom of a trough 64 leading upwardly from the end of the branch 3 of the tank to the trough 36, into which the conveyer discharges, the wood delivered to the trough being directed by the latter into the feed hopper 37. The chain travels over a lower sprocket wheel 65 suitably mounted at the side of the drum near its discharge end, and over an upper sprocket wheel 66 sustained by the frame work 18 adjacent the receiving end of the drum, the said chain being driven continuously in any suitable manner and from any suitable source of power. Such chunks of wood as are not completely freed of the bark will be directed by the workman on the platform 10*, by means of a pole, onto said conveyer chain of the conveyer 63.

In order that the wood may be retarded in its passage-through the drum, I propose to provide the same on its interior with'a series of retarding devices in the. form of transverse partitions A arranged at intervals throughout the length of the drum, with central openings to permit the wood to pass therethrough, these partitions with the openings forming in effect inwardly extending annular ribs. The openings in the partitions at the receiving end of the drum are greater in diameter than those at the discharge end, the said openings gradually de creasing in diameter as the discharge end is approached. The purpose of this particular construction is to cause the mass of wood .to gradually approach the transverse center other, will, by their impact and attrition,

of the drum in its advance therethrough.

detach the bark, which will escape through the slots in the end of the drum, while the bark-freed woodiwillbe deliveredthrough the discharge opening, and the wood and bark will enter'the lateral branch 3 of the tank,

' the bark being continuously removed and strained of its water and delivered over the side of the tank, while the wood will be carrupted, the wood being continuously fed to the drum, the Water being continuously circulated therethrough, the bark and wood being continuously discharged from the drum, and the bark being continuously removed from the tank.

In regard to the feature herein disclosed of continuously feeding the wood to be barked into the receiving end of thedrum while at the same time inducing a continuous fiow of the water axially through the drum, I lay no claim herein broadly to this feature as it is claimed broadly in a copending application of Ambrose H. White,

filed March 26, 1915, Ser. No. 17084. The claims I make herein to this feature are directed to the return of the water escaping from the discharge end of the drum to its for effecting a flow of water axially through the drum from its receiving end toward its discharge end, said latter means operating to return the water discharged by the drum, to its receiving end and to circulate it through the drum as a continuous body inside and outside the drum, said drum operating in its rotation to remove the bark from the wood and deliver the barked wood continuously.

2: In a mechanism for barking wood, the combination of a tank containing a body of water, a horizontal rotary drum mounted outside said tank and communicating at its ends with the ends of the tank; whereby the Water Will occupy a common level inside and outside the drum without contacting with the exterior thereof, and means for circulating said water continuously through the tank and drum from the receiving end of the drum toward its discharge end.

' 3. A rotary barking drum having receiv ing and discharge ends,-an'd provided on its interior with inwardly extending retarding partitions having openings therethrough for the passage of the wood, the openings in the partitions adjacent the receiving end of the drum being larger than those in the partitions adjacent the discharge end of the drum.

4:. A rotary barking drum having receiving and discharge ends, and provided on its interior with inwardly extendingv retarding ried away by the conveyer 62. Such wood partitions having openings therethrough for the passage of the wood, said openings being of gradually decreasing size from the rece1v ing end to the discharge end of the drum.

5. In combination with a water tank, a rotary drum having a perforate portion, said drum adapted to detach the bark from the and an endless conveyer. movable in the tank,

under the drum and operating to remove the V bark from the tank.

7. In combination with a water tank, a rotar'y barking drum operable to detach the bark from the wood and to discharge the bark into the tank, a screen, and a conveyer movable in the tank and cooperating With the screen in advancing the bark thereover. '8. In combination with a water tank, 'a screen inclined upwardly from the bottom thereof,'a rotary barking drum operable to detach the bark from the wood and discharge the bark into the tank, and a conveyer movableover the bottom of the tank and over the inclined screen, and acting to advance the bark thereover.

9. In combination with a water tank having two lateral branches, a barking drum mounted for rotation outside of said tank between said branches, in position to receive the water from one part of the tank, and to discharge the same into another part of the tank; whereby a continuous circulation of waterthrough the tank and drum may be efiected.

10. In combination with a water tank hav- I ing two lateral branches, a barking drum mounted for rotation outside of said tank between said branches, in position to receive 'thewater from one part of said tank, and to discharge the same into another part of\the tank, and means for effecting a circulation of the water through the tank and drum.

11. In combination with a water tank having two lateral branches, and a connecting portion, a rotary barking drum having a receiving end communicating with one of the lateral branches to receive the water there from, and having its discharge end in posi tion to discharge into the other lateral branch, and a device acting in the connecting portion of the tank to create a circulation of the water'through the tank and drum.

12. In combination with a water tank having two lateral branches and a connectg P 9 I'Otary barking drum having a receiving end communicating with one of the lateral branches to receive. the water therefrom, and having its discharge end in position to discharge into the other lateral branch; whereby a continuous circulation of water through the tank and drum may be efiected. I

p 1b. In combination with a water tank having two lateral branches and a longitudinal connecting portion, a barking drum mounted for rotation alongside the longitudinal portion of the tank, said drum having its receiving end in communication with one of the lateral branches to receive the water therefrom, and having its discharge end in position to discharge into the other lateral branch, and means for circulating the water a through said tank and drum.

14. In combination with a water tank having a latera branch provided with a discharge mout a rotary barking drum having receiving end in position to receive the waterflowing through said mouth, and a packing between the drum and mouth.

15. In combination with a water tank having a lateral branch provided with a discharge mouth, and a peripheral shoulder, a rotating barking drum having its receiving end in position toireceive the water flowing through the discharge mouth, an annular axial shoulder on the drum in proximity to the shoulder on the mouth, and a packing strip bearing on said shoulders.

16. Incombination with. a water tank 'havinga lateral branch with inner and outer walls, a rotary barking drum extended at its discharge end across the inner wall and discharging into said branch of the tank, and a packing between the said inner wall and the drum.

17 In combination with a water tank having a lateral branch with inner and outer walls, said inner wall being provided with a curved seat, a rotary barking drum projecting at its discharge end across said inner wall, and extending in said seat, and a packing between the drum and seat.

18. In combination with a water tank having two lateral branches and a connecting ortion, one of said branches having a disc arge mouth, and the otherhaving inner and outer walls, a barking drum mounted for rotation alongsidethe connecting portion of the tank, with its receiving end in position to receive the water from the discharge mouth, and with its discharge end in position to discharge between the inner and outer walls, a packing between the receiving end of the drum and the discharge mouth, and a packing between the drum and said inner wall.

19. In an apparatus for barking wood, the combination of a rotary barking drum adapted to receive the wood to be barked in its receiving end and operating to deliver the same from its discharge end, and power eling conveyer extending from the discharge operated means acting to return chunks of end of the drum'to the receiving end in posi- 10 Wood tothe receiving end of the drum; tion to receive chunks of Wood delivered 20. In an apparatus for barking Wood, 0 from the drum, and convey the same to the the combination of a rotary barking drum receiving end of the drum.

adapted to receive the Wood to be barked in In testimony whereof, I have afiixed my its receiving end and operating to deliver signature. the same from 1ts dlscharge end, and a trav- EDWARD HUTCHINS,

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