US977376A - Drying-cylinder for paper-making machines. - Google Patents

Description

O. W. DODGE.

DRYING-CYLINDER FOR PAPER MAKING MACHINES.

APPLICATION FILED MAILl-l, 1910. 9W3876 Patented Nov. 29, 1910v 1 SHEETSSHEET 1.

0. W. DODGE. DRYING CYLINDER FOR PAPER MAKING MACHINES.

APPLICATION FILED MAR. 11, 1910.

Patented Nov. 29, 1910.

9. SEEBTSSHEET 2.

' and much heat is lost by the water of conzdeisation adhering to the walls of the cyl- .'1n er.

[of the invention. Fig. 2

'sation'from'such drying cylinders, and will UNITED STATES PATENT OFFICE.

OTIS \VM. DODGE, 01? PORT EDWARDS,YWISCONSIN.

DRYING-CYLIINDER FOR PAPER-MAKING MACHINES.

Application filed March 11,

To all whom it may concern;

Be it known that I, O'ris \VM. DODGE, of Port Edwards, in the county of Wood and State of Wisconsin, have invented certain new and useful Improvements in Drying- Qylinders for Paper-Making Machines; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part ofthis'specification.

This invention relates to so-c'alled dryin g cylinders for paper making and other rhachinesfin which the material is dried by passing it over steam heated cylinders; and the object of this invention is to provide e-fiicient means for withdrawing the water of condensation from such cylinders thoroughly and eii'ectively. In Fourdrinier pa ger machines where the matted pulp to beried is very wet, a great deal of steam is condensed in the cylinders, and the efficiency of such cylinders is greatly impaired if the water of condensation remains therein. And also .a great amount of steam is wasted .by contact witlrthe water of condensation Various attempts have been made to remove the water of condensation from such cylinders and the object of my invention is to accomplish the removal of all water of condensation quickly and effectively, thereby economizin the' steam and greatly increasing the e ciency of such cylinder.

My invention therefore consists in the novel means for removing water of condenbe readily comprehended upon reading the following description and by reference to the accompanying. drawings, in which I have illustrated several embodiments of the invention as applied to a drying cylinder. And I will summarize in the claims the features of the invention for which protection is desired.

In said drawing's -Figure l is a longitudinal section through a conventional form of drying cylinder showing one embodiment is an. enlarged transverse section on line 22, Fig. 1, showing the scoop in different positions by the aid of dotted lines; and Fig. 3 is a similar section on line 3-3, Fig. 1. Fig. 4 is a 1011- gitudinal section of another embodiment of theinvention; and Fig. 5 is a cross section Specification of Letters Patent.

Patented Nov. 29,1910. 1910. Serial No. 548,658.

on line 5.5, Fig. 4. Fig. 6 is a longitudirial section of a cylinder showing another embodiment of the invention; and Fig. 7 is a cross section on line 7-7, Fig. 6.

In the drawings, 1 designates a drying cylinder which may be of any desired kinc and is'usually constructed of some sheet metal that is a good conductor of heat, and inounted upon hollow trunnions 1, l Arranged axially of and within said cylinder is a drain pipe 2 which may extend through either trunnion; butas shown in Fig. 1-

it closed at the end. next trunnion 1 and extends through trunnion 1 and may be connected outside the-trunnion 1 by means of a suitable notary stuiling box 2 to a drain pipe 2*, as shown. Steam can be admitted to the cylinder 1 through either one of these hollow trunnions and exhausted through the other. In the latter case steam might be conducted through thetrunnion 1 and'exhausted through the-trunnion 1}, in which case the drain pipe 2 could discharge into the exhaust pipe. The arrangement of the steam inlet and exhaust pipes and their connections to the cylinder 1 forms no part of the present invention and therefore it is unnecessary to illustrate same; nor is it necessary to illustrate the discharge connections of the pipe 2 outside the cylinder as this will vary according to the construction of the machine in which the drying cylinder is employed, and the steam connections therewith, it only being essential that the pipe 2 shall discharge the waterof condensation conducted theroi-nto outside of the cylinder 1.

Attached to the inner wall of the cylinder and extending longitudinally thereof, is a scoop 3, which is preferably formed of a strip. of sheet. metal bent in U-shupc; .one side of said scoop being attached to the in nor wall of the cylinder as shown in Figs.

' l and 2, in any suitable way, so as to make a close joint therewith at itsedge; and the mouth of said scoop opening in the direction of rotation of the cylinder, so that as the scoop rotates, with the cylinder, it will pick up all the water in the cylinder. The scoop is preferably provided at suitable intervals with pockets 3 in its bottom or rear side, and these pockets in turnare connected with the pipe 2 by means of pipes 2 which are preferably bent on a convolute curve as shown', so that as the scoop rises at the ascending side of the cylinder the water-will low the level or" the drain pipe '2'.

' pipe that flow from the pockets into pipes 2 and pass therethrough into the drain pipe 2 dur- .ing the rotation of the cylinder.

As shown in l ig'L'Q the bends 2" of the pipes 2 adjacent the drain pipe 2 may be such that the Waterwill be trapped in the bends. 2 as the scoop rises and some water will be retained in the bends 2 and dis charged therefrom into pipe 2 as the scoop descends. Thus the water may be discharging all the time through the pipes 2 into the pipe 2, and the bends therein prevent any water draining back from the pipe 2 into the trough when the letter comes be.-

I may make some of the pipes 2 with different bends. As shown in Fig. 1 every other pipe 2. has a full convolution, thebcnd being extended beyond the bend 2', as shown at 2,

"sofas/to connect with the. pipe 2 at the side thereof directly adjacent the scoop 3 (see Fig. while the bends 2 connect With the at the side opposite the scoop 2). In other words it might be said Fig.

the pipes having the. bonds 2 make a 3 (see half turn around the drain pipe 2 While the" pipes havingthe bends 2 iii nuke a full turnaround the drain pipe 2. in this construction the pipes llll not all discharge siinultanoously und equally into the drain pipe 2, as the pipes having the bends 2 will discharge into the pipe 2 practically alternntely with the pipe having the bends 2*,"which will prevent any such accumulatio'n of water in, or sudden discharge of water into the pipe 2, as might chose the letter or cause water to back up into the )ipes 2 ind discharge baclr into the cyliner. 'As the scoop extends the length of the cylinder it will be obvious that all water of condensation in the cylinder will be picked up and discharged through the pipe The cylinders are sometimes lllkHlQ'St) 7 longrthat it is n cessary to eniploy internal annular braces to stiffen them; and my invention is especially adsptedthertato as the scoop can be made practically continuous, intermediate the braces, or even puss therethrough as desired. I

If the cylinder is of very large diameter or the condensation therein is very great, a plurality of scoops may be used. In Figs. 4: and 'Zytivo diametrically opposite scoops 3 aroshor-zn within the cylinder, eachcon- 'nectedto the central drain pipe 2 by pipes 2 As shown in Fig. 4 the pipe 2 need not necessarily be one continuous pipe but could be made up of a series of pipe sections suitably united. i

- f course one of the features of the invention is to provide for removing the water of condensation simultaneously substantially alongthe entire length of the cylinder, by

means of a scoop or series of scoops extendthe cylinder.

sworn in place of one continuous metal scoop 3, as shown in Figs. 1 and t, a series o short scoops 3 may be arranged close together, and preferably in line,.longitudinall y of the cylinder, as shown in Figs. 6 and 7,. each of said short scoops being connected by a pipe 2 *ith the central drain pipe 2.

While it would be possible to rotate the scoops Within the cylinder, I prefer to have the scoops rotate with the cylinder, and therefore to fasten the outside edges of the scoops to the inner wall'of the cylinder as sho vn in the drawings. By reason of the curve in the pipes, as described, the scoop will be in position to begin to take up Water, before any Water in the curved pipes or pipe 2 could return therefrom into the scoop, and therefore "the water of condensntion will a ways be discharged through the pi e 2.

The inner end of the pipe 2 may e either directly supported in the stutiing box 1 or on bracket l attached to the head of the cylinder shown.

As the scoop travels with the drying shell it scoops writer from the bottom of the cylinder and as it moves upward the Water flows down through the curved pipes and is delivered into the drain pipe which in turn discharges the water out of the cylinder.

\l hut I claim is: i l

1. In combination with a drying cylinder, an axially disposed drain pipe arranged within the cylinder and extending substan tiall the len th thereof scoo in means within and extending longitudinally of the cylinder, and convolutely bent pipes for conducting water from the scooping means into said drain pipe.

2. In combination with a drying cylinder, an axially disposed drain pipe arranged within the cylinder and extending longitudinally thereof, scooping means extending longitudinally of the cylinder, and convolutely bent pipes for conducting water from the scooping means into said drain pipe, some of the pipes having a greater convolute bend than others, whereby the time of discharge of said convolute pipes into the drain pipe is varied. I V

3. In'conibination with a drying cylinder, scooping means attached to the inner wall of and extending substantially from end to end of the cylinder, admin pipe extending axially of and substantially from end to end of the cylinder, and pipes connecting said scoop with the drain-pipe, said Connect ing pipes being bent on convolute curves, substantially as described.

In combination with a drying. cylinder,

pipes for coinlucting, water from the scoop pockets into said drain-pipe. 5. In combination with a drying cylinder,

siibstantially f 'oinend to end of the-cylindel, and eonVolut-ely hent pi1 es eonneoiing' said scoop with the? difain-pipe. l

(S. In eolnlnnallon with a drying cylinder;

longitudinally disposed scooping meansatiaclied to the inner wall thereof and exiending substantially from end to end of the cylinder, an axially (lISPOSQLl drain pipe. extendlng xldmtantlally from end to end of the necting said 'sooopin'g means withihedrain IHIX SUIHO of the connecting pipes having (their eom'olutions of greater-extent than -that of 'the othersio vary fche time of discharge "of the pipe.

my own, I ailix my signature in prsnc' of two witnesses.

(.)TlS NM; DODGE.

, 'itnesses:

B, R. Goooms,

conwilutopipes' to the drain '1 n l'estnnony that I 'claiin the foregoing" a's-

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