US1726917A

US1726917A - Rod-mill inlet and outlet control

Info

Publication number: US1726917A
Application number: US221667A
Authority: US
Inventors: North Ray Adna
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-09-24
Filing date: 1927-09-24
Publication date: 1929-09-03
Anticipated expiration: 1946-09-03

Description

Se t. 3, 1929. R, A, NORTH 1,726,917

ROD MILL INLET AND OUTLET CONTROL F-iled Sept. 24, 1927 3 Sheets-Sheet l LN-3.... up.

INVENTOR,

= W i I 3 Sheets-Sheet 2 Sept. 3, 1929. R. A. NORTH ROD MILL INLET AND OUTLET CONTROL Filed Sept. 24, 1927 Sept. 3, 1929. NORTH 1,726,917

ROD MILL INLET AND OUTLET CONTROL Filed Sept. 24, 1927 3 sneets sheet 5 Q to J w K: \k y [L '9 Q m i t r L 0 o ,rn

INVEN TOR.

Patented Sept. 3, 1929,

UNITED STATES RAY ADNA NORTH, OF GREEN BAY, WISCONSIN.

ROD-MILL INLET AND OUTLET CONTROL.

Application filed September 24, 1927. Serial No. 221,667.

The invention relates generally to improvements in rod mills for convertlng fibrous materials into pulp, and more especially relates to the inlet and outlet controls of the rod mills.

In the art of manufacturing paper pulp it has been discovered that the quality of stock from any rod mill depends on the rate of feed of fibrous materials into the inlet of the mill, and likewise the discharge o1 delivcry of the segregated fibrous materials, such as wood, cane or the like, from said mill, especially this being so on screenings. Therefore, it is the aim of the present lnvention to provide inlet and outlet controls to the'rod mill, whereby the feed and discharge of fibrous materials-may be regulated to satisfy any and all conditions in the operation of the mill to assure the proper density of pulp and best quality at all times.

Another aim of the present invention is to provide quick and easy adjustment both at the inlet and outlet ends of the mill, whereby the feed of the materials and the discharge of the same can be accomplished with certainty and a uniform density of pulp maintained at all times.

A further aim of the present invention is to materially simplify the inlet and outlet controls, so that the same can be installed without altering to any great degree the make up of the rod mill, and to assure perfect operation at the instant of adjustment of the controls.

The invention accordingly consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings showing the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawings:

Figure 1, is a side elevation fragmentarily longitudinally sectioned, showing the rod mill with the controls constructed in accordance with the invention.

Figure 2, is a vertical transverse sectional elevation taken on the line 22 of Figure 1.

Figure 3, is an end elevation along the line 33 of Figure 1, of the outlet control.

Figure 4, is a vertical sectional view there of showing the closed position of the gate.

Figure 5, is a view similar to Figure 4, showing the gate in open position.

Figure 6, is a sectional view on the line 6-6 of Figure 1, showing the inlet control.

Figure 7, is an end elevation of the rod mill looking toward the inlet end of the same.

Figure 8, is a fragmentary elevation look ing toward the outlet end of the rod mill.

Similar reference characters indicate cor responding parts throughout the several views in the drawings.

The mill illustrated in the drawings in detail comprises in general a drum or shell A, preferably of cylindrical form, having end heads 10, and 11, respectively, these being fitted to said drum or shell in any desirable manner, while externally of the drum or shell at intervals longitudinally thereof are reinforcing bars 12, which are made fast in any suitable way. The heads 10, and 11, are supported in trunnions 13, which are carried upon foundation sills 14, spaced apart and arranged at opposite ends of the mill.

Within the drum or shell A, is a liner composed of alternately arranged series of deep and shallow strips 15, and 16, respectively, these being longitudinally disposed in said drum or shell in close contact with each other. while grouped within the latter is a plurality of freely tumbling disintegrating rods 17, and 18, respectively, which extend substantially throughout the length of the distintegrating chamber B, formed by the drum or shell A. The rods 17, are of less cross-sectional diameter than the rods 18, which enables a more thorough disintegrating action to be had in conjunction with the liner formed by the strips 15, and 16, in

their arrangement hereinbefore described.

Formed centrally of the head 10, is an outwardly tapered inlet 19, into which slightly" protrudes the inner end of a semi-cylindrical feed trough 20, forming the bottom of a feed hopper 21, held by supports 22, the trough 20, being horizontally disposed and has located therein a feed-screw 23, which is coupled with the inlet 19, through the medium of the device 24, so that said screw 23, will rotate with the drum or shell A, as will be apparent. The device 24, permits the centering of the screw 23, within the trough 20, and likewise with relation to the inlet 19.

The mill is rotated by means of gears 25, peripherally formed on the heads 10, and 11, which gears mesh with pinions 26, on a driven shaft 27, the latter being journaled in bearings 28, and this shaft carries a gear 28, meshing with a pinion 29, on a power shaft 30, provided with a belt wheel 31, operated from any suitable source of power. It is of course understood that the mill is operated at a relatively low speed.

Arranged within the hopper 2i, are opposed downwardly convergent adjustable controls in the form of shutters or gates 39., these being slidably fitted in guides 33, and are provided with loop handles 34, so that the same can be manually shifted to increase or decrease the feed of materials from the hopper 21, to the trough 20, thereby regulating the quantity of materials admitted to the drum or shell A.

Centrally of the head 11. is an outlet 35, in which located an outlet control, comprising a funnel shaped mouth portion 36, and a flanged rim 37, which latter fits snugly within the outlet 35, near its inner end. The inner end 38, ot the outlet is beveled to present an outward tapered portion there to. The mouth portion 36. is formed at its lowermost portion with a trough like channel 39, communicating directly with a discharge spout. 40, formed on and projecting outwardly from a cover or cap 41, secured to the trunnion 13, about the outlet 35, the cover or cap 41, being formed with an arched discharge way or opening 42, directly over the spout 40, through which the pulp'is delivered from the mill.

Encircling the drum or shell A, intermediate its ends is an annular track 43, against which play flanged idle rollers 44, these being journaled in swinging bearings 45, reversely arranged and hinged by a pivot 46, common to both bearings, upon a base member 47, arranged between the sills 14. The base member 47, has fitted therein coiled tensioning springs 48, which work against the swinging bearings 45, to maintain the rollers 44, constantly in contact with the track 43, upon the drum or shell A.,'of the mill.

Overhanging the inner end of the channel 39, is a swinging gate 49, carrying a latch 50, which enables said gate to be fastened closed or opened. When the gate 49, is closed it reduces the discharge capacity of the mouth portion 36, of the outlet control. To enable the gate 49, to be fastened open for increasing the discharge capacity of the outlet control there is provided a cross strut 51, over the channel 39, in advance of the point of hinge mounting of said gate 49, so that the latch 50, can engage with said strut, the latch being manually actuated.

The drum or shell A, on opposite sides of the track 43, is provided with a pair of longitudinally aligned discharge openings 52, nordrum or shell A,

mally closed by slidable covers or closures 53, these being supported in guides 54, on the exteriorly thereof. By opening the covers or'closures 53, the drum or shell A, can be conveniently emptied orthe material dispensed therefrom into receptacles 54, removably placed beneath the latter.

In the operation of the mill, the wood chips which a re prelin'iinarily treated in order to soften the same, are fed into the drum or shell A, from the hopper 21, the inletcontrol being regulated to assure the proper or required feed of material from said hopper. The chips are admitted with liquid and due to their so't't condition, are subjected to a squeezing and rubbing action between the cascading rolling rods 1 and 18, and their action with the strips 15, and 16, whereby' the fibers are effectively separated without undesirably breaking or otherwise damaging the same. As the chips advance through the disintegrating chamber B, and toward the outlet, the segregated fibers are eventually discharged with the required density through the outlet control into the delivery spout 40, and thence from the mill, for ready subsequent utilization in the manufacture of paper pulp.

The inlet and outlet controls assure regulation of the required density of the material within the mill during the operation of the same, as will be clearly apparent.

It is to be understood that the invention is not to be limited to the exact details of construction and operation herein shown and described for variations and modifications within the scope of the claims may be resorted to and appear to those skilled in the art.

What is claimed is:

1. In a mill of the kind described, a revolving cylinder having an outlet, an outlet control including a funnel shaped mouth piece fitted in the outlet and having a flanged rim at the inner end of the latter, a trough formed at the lower portion of the mouth piece to provide a channel therein, a cover on the mouth piece and having a spout and opening coincident with the channel, and an adjustable gate shaped correspondingly to and overhanging channel.

2. In a mill of the kind described, a revolving drum having an outlet, an outlet control including a substantially funnel shaped mouth piece fitted in the outlet and having a flanged rim at the inner end thereof, a trough formed at the lower portion bf the mouth piece to provide a channel therein, a cover on the outer end of: the mouthpiece and having a spout and opening coincident with the channel, an adjustable gate shaped correspondingly to and overhanging the inner end of the channel, and means for sustaining the gate in various adjusted positions to regulate the discharge capacity of the outlet control.

In testimony whereof I afiix my signature.

RAY Anna NORTH.

the inner end of the