US2381286A - Stock inlet - Google Patents

Description

Aug. 7, 1945.

L. HORNBOSTEL ET AL STOCK INLET Filed Feb. 5, 1942 7 Sheets-Sheet 2 52L LC. 5581?). [A070 Ham/50575;

Aug. 7, 1945. L. HORNBOSTEL ET AL 2,381,286

STOCK INLET Filed Feb. 5, 1942 7 Sheets-Sheet 3 mm: h ,im. 1 I

Au 7, 1945, L. HORN-HOSTEL ET AL 2,381,286

STOCK INLET Filed Feb. 5, 1942 7 sheets sheet 4 lwya flaeA/aasral Aug. 7,

1.v HORNBOSTEL ETAL 2,381,286

STOCK INLET Filed Feb. 5, 1942 7 Sheets- Sheet 5 L Pmrsm far 5 5124 6 Bree/- ZLOVQ flaws/Basra.

' Aug. 7, 1945. 1.. HORNBOSTEL ET AL- ,381, 6

STOCK INLET 7 Sheets-Sheet 6 Filed Feb. 5, 1942 1576/. E Esme/ Aug. 7, 1945. L. HORNBOSTEL ET AL 2,381,285

STOCK INLET Filed Feb. 5, 1942 "(Sheets-Sheet 7 Patented Aug. 7, 1945 assists STOCK INLET Lloyd Bornbostei and Earl R. Berry, Beloit, Wis auignors to Beloit Iron Works, Beloit. Win, a corporation of Wisconsin Application February 5, 1942, Serial No. mm

Claims.

This invention relates to an improved stock inlet for paper making machines wherein stock is continuously flowed in opposite directions transversely across the width of the machine and is then ejected upwardly through an orifice of 6 controlled size into a reservoir from which it can flow under slices onto the forming surface of the paper machine.

A feature of the invention resides in the provision of tapered conduits for the cross flowing m Still another feature of the invention is the so provision of an adjustable horizontal plate in a chamber receiving the stock from the cross flowing streams for the purpose of inducing agitation of the stock before it reaches the slices of the inlet.

Still another feature of the invention is to pro-- vide a chamber over the adjustable plate for storing the stock momentarily before feeding the same to the slices and thereby absorb any slight pulsations or stock variations that might exist in the stock This surge chamber levels out any irregularities without, however, creating a quiescent poml of the stock-permitting fiber flocculation. In addition, the surge chamber makes possible the elimination of any air that may be trapped in the stock. If desired, this surge chamber can be clmd and kept under pressure in order to build up a head of stock without resortin: to the use of a very high chamber.

Still another feature of the invention resides in the use of white water directly from a pit underneath the forming part of the machine as a diluent for the stock. In accordance with this feature of the invention the white water and the stock can be directly fed into a fan type Pump and discharged by the pump into the cross flow conduits for ejection into the surge chamber and thence under the slices onto the' i'orming surface.

cally described in connection with a Fourdrinier type of paper making machine it should be undentood that the principles of the invention are applicabletodewateringmachineslngencralss While the invention will be hereinafter specifiand including cylinder type paper mamas machines.

According to this invention. paws stock is diluted to the proper consistency with white water directly drained from the forming surface of a paper machine. In this manner the white water is continually reused and high velocity flow of stock can be obtained without water wastage and without the necessity for a large water supply. The stock, when diluted with the white water, is pumped to flow at a rate above that at which the fibers can fiocsulate. Stock speeds in excess of two feet per second are preferred. At such speeds the fibers will not form up into bundles due to electrical charges or effects of such charges produced in the fibers by the heaters and pumps.

The fast flowing stock is split up into two streams and fed to opposite sides of the paper making machine at a point adjacent the forming surface. The stock flows from the opposite sides of the machine throush conduits which decrease in size from their inlet ends. The stock is ejected from the resulting cross flow streams upwardly into the surge chamber referred to hereinabove. Any excess stock reaching the side of the ma= chine opposite to that side in which it is introduced is directly fed into the incoming stock so that no dead ends occur in the cross flow eondults. The velocity of the stock is thus main tained even though only small amounts are ejected out of the cross flowing streams.

The bottom of the surge chamber is level with or above the forming surface and, rectifier rolls can be driven in the pond of stock maintained in the surge chamber for additionally agitating stock to prevent fiber flocculation or fiber settlement. v

The stock is ejected from the surge chamber under slices which can be readily adjusted to provide a final control for the stock feed onto the forming surface.

It is, then, an object of the invention to provide a stock feed for deliquefying machines wherein the filtered liquid is directly used as a diluent for the stock and wherein the diluted stock is maintained in a flowing condition for uniform distribution across the entire of the machine;

A further object of the invention is to provide an improved stock inlet for paper making machineswhereinltockiscausedtoflowacrossthe width of such machines in opposite directions andisthendirectly'introducedintoasurge cham erwhichlevelsoutanypulsatiorsinthe Figure 1.

' inlet is supporte flowing stock without permitting fiber flocculation or fiber settlement.

Another object of the invention is to provide a stock inlet for paper making machines of the type accommodating cross flowing streams of stock with a single adjustable discharge device accurately controlling ejection of the stock from the stream across the entire width of the machine.

A further object of the invention is to provide a surge chamber in a stock inlet of the type including cross flow conduits for the stock.

Still another object of the invention is to provide a stock inlet with a horizontal baliie plate which is adjustable into the path of an upwardly flowing stream of stock to agitate the stock.

Other and further objects of the invention will be apparent to those skilled in the art from the following detailed description of the annexed sheets of drawings which, by way of preferred examples, illustrate the invention.

it should he understood that the invention is assnsse charge opening at the top of the conduit box.

The wall ltu converges toward the slot H as at b for defining a converging throat "a to the slot ll.

A vertical rear-wall I8 is mounted on the wall lid and extends to the top of the unit as shown in Figure 5. This rear wall can be formed of metal or wood, as shown. A second vertical wall It extends from the wall lta but terminates 20 about the level of the top run of the forming wire not limited to the illustrated examples, and that details of construction andassembly can be widely varied without departing from the scope of the invention.

n the drawings:

Figure 1 is a front side elevational view of one form of stock inlet according to this invention and also illustrating the breast roll and of the forming part of a Fourdrinier type paper making machine.

Figure 2 is a broken rear end elevational view of the stock inlet shown in Figure 1.

Figure 3 is a broken top plan view of the stock inlet shown in Figure 1.

; Figure 4 15's. fragmentary rear side elevational view of the stock inlet shown in Figure '1.

Figure 5 is a vertical cross-sectional view along the line V-V of Figure 3.

Figure 6 is a horizontal cross-sectional view along the-line VIVI of Fi e 2.

Figure '1 is an enlarged fragmentary vertical cross-sectional view along the line VII-VII of Figure 3.

Figure 8 is an enlarged fragmentary horizontal cross-sectional view along the line VIE-VIII of Figure 9 is a vertical cross-sectional diagram-- matic view of a stock inlet according to this invention equipped with a closed surge chamber.

Figure 10 is an enlarged detail view with parts thebreastro broken away and shown in vertical cross section,

of a control valve for the introduction of stock and air to the closed type surge chamb'er'of Figure 9.

Figure 11 is a diagrammatic side elevational view illustrating the manner in which white waterdrained from the forming part of a Fourdrinier type paper machine can be directlyused for diluting stock to be fed to the stock inlet of this invention.

As shown on the drawings: I As shown in Figures ito- 5,-the reference numeral l0 designates generallya stock inlet according to this invention mounted on the fioor I at the rear end of a pit 1? adjacent the breast roll BR of a Eourdrinier type paper making machine. The breast roll BR receives the forming wire PW of the paper machine therearound As best shownin Figures 1. 2 ands, the on aplurality of I-beams ll whicharemountedonpads ll formodonthefioor l". A I-beam .II straddieathe'pit P FW of the paper making machine.

The walls I and is are spaced apart to define a passageway P1 bottomed by the slot ll. Filler blocks can be provided in the passageway Pi to define a divergent discharge throat from the 3 be removed through the media of swing bolts 2! w of for permitting ready access to the interior. End plates such as iid are also provided in the structure l6 above the removable plates 380.

End pieces 2! are mounted on top of the structure l6 and have internally threaded bearings 2 I a carried at the rear ends thereof. These bear- .ings are equipped with hand wheels 22 and receive therethrough the threaded end portions rods 23 which extend through the rear wall 86. An apron support 24 is mounted on the posts and also on the front end of the structure it as shown. This apron support 24 carries an apron 25 which n rizojects forwardly to the top of 11 As shown in Figures 1, 2, 3 and 8, the end pieces II have outwardy projecting ledges Mb integral therewith supporting vertical columns 36 which project to the top of the inlet 10. Side walls 21 are mounted on top of the and pieces 2| and are bolted or otherwise secured to the columns 28.

Similar ledges 24a are fo'rmed on the apron support 24 to carry similar columns 28 which can be bolted to columns 28 as shown in Figure 1. These columns 23 and the apron support 2% carry vertical side plates 28 which project forwardly from the apron-25 over the upper run of the forming. wire FW. As shown in Figures 3 and 5, a cross brace B can extend between the forward ends of the plates 29 to rigidly tie the same together. p

As in Figure 5, the plates 28 have cir cular apertures 28a and 18b therethrough with pocket recesses ilc therein. The pocket recesses "c of the apertures llb have horizontal compopents.

Reticular' rectifier mils ll and 3| are adapted relation above the top of the rectifier roll 30.

A second slice 33 is carried in saddles 34 which are slidably mounted on the side plates 29. The

second slice 33 is vertically slidable in the saddles '34 and has the lower end thereof spaced a desired distance above the apron 25 in front of the rectifier roll 3|. The saddles 34 can be moved horizontally on the plates 29 by means of screw rods 35 carried in brackets 36 which are secured to the plates 29. The slice 33 is thus shiftable horizontally. As explained above the rectifier roll 3| is also horizontally shiftable.

A third or final slice 3'! is carried in front of the slice 33 on saddles 38. The saddles 38 have lugs 39 projecting through horizontal slots 40 in the side plates 29 as best shown in Figure 5. As best shown in Figures 1 and 3, these lugs 39 receive the eye ends of rods 4| thereon. The rods 4| extend through brackets 42 integral with or .afiixed to the outer faces of the side plates 29.

Nut 43 are threaded on the ends of the rods 4| on each side of the brackets 42 for shiftin the rods to mov the saddles horizontally. The third slice 3'! is thus horizontally shiftable relative to the breast roll and can be moved toward the front ends of the plates 29. The slice 3'! is also vertically shif table in the saddles 38.

The rear wall l8, the side walls 29, and the apron support 24, together with the three slices, define a surge chamber S. C. receiving stock from the passageway P1.

This surge chamber S. C. has three compartments, 'A, B, and C as shown in Figure 5 created by virtue of the three slices 32, 33 and 31. The stock fiows upwardly through the passageway P1 into the first compartment A and thence under the first slice or baflle 32, through the rectifier roll 38 into the compartment B. From the compartment B the stock fiows through the rectifier roll 3|, under the second slice 33 and thence into the compartment C from which it is discharged under the slice 31 onto the forming wire. The compartmentC can be partially bottomed by the forming wire FW for maintaining a pond of stock on the forming wire. The compartments B and C are adjustable in width by virtue of the horizontally shiftable slices, 34 and 31.

As best shown in Figures 3, 5 and 8, the apron support 24 has mounted on the top thereof a horizontal baflle guide plate46. This plate 46 is held by screws 41 threaded into the apron support 24 andv is held in spaced relation above the apron support and the wall l9 of the inlet by spacers or washers 41a disposed around the screws (Figure 7). A horizontal bafile plate 48, slotted at 48a to receive the washers 41a, is mounted under the guide plate 46. This baflle plate is movable ,intothe passageway P1 by means of the rods 23 described hereinabove. These rods 23, as shown in Figures 3 and 8 of the drawings, extend through the rear wall l8 of the inlet and have lugged ends 23a seated in recesses in the ends of the baiiie plate 48. Operation of the hand wheels 22 will move the baiile plate 46 into and out the passageway P 1.

The baflle plate is adapted to choke off flow from the passageway P1 into the first compartment A of the surge chamber S. C. This choking of! of the fiow serves to agitate the stock since the stock must flow around the end of the baiile.

As best shown in Figures 2 and 4, the rear side wall 21 and the rear column 26 carry a bracket 56 at the top thereof on which a motor 5| is mounted. This motor 5| drives a pair of sprockets 52 and 53 around which are trained sprocket chains 54 and 55 respectively. The sprocket chain 54 drives a sprocket 56 on the axle 36a of the rectifier roll 36. The sprocket chain 55 is trained over an idler sprocket 51 carried on a bracket 58 which is adjustably mounted on the plate 29. The chain 55 drives a sprocket 59 on the axle 3| a of the rectifier roll 3|. Since the rectifier roll 3|a is horizontally shiftable through the supporting bearing members 29c the idler sprocket 51 is also shiftable to maintain the chain 55 in taut condition.

In this manner both rectifier rolls are driven at the bottom of the surge chamber by means of a single prime mover which is carried by the top of the stock inlet.

As shown in Figures 1, 5 and 6, the conduit box l5 does not extend at right angles to the line of the paper machine but extends somewhat diagonally across the width of the machine. Partition walls 66 and 6|, as shown in Figure 5, are mounted in the box l5 and extend transversely with respect to the line of the paper machine so as to define with the diagonally disposed box a pair of tapered conduits |5a and l5b. The partition walls 60 and 6| terminate short of the ends of the box Hi to provide connecting passages |5c between the passages I51: and |5b as best shown in Figure 6.

As best shown in Figure 5, the walls 60 and 6| are spaced apart to define a central chamber 62 therebetween which is isolated from the compartments |5a and l5b. Rods 63 extend through this chamber 62 at desired intervals and are pinned at their upper ends to a nose-piece 64 covering the tops of the walls 66 and 6| and having side portions 64a slidable over the sides of the walls.

The nose-piece 64 has oppositely inclined top wall portions 64b corresponding in taper with the sloping wall portion |6b of the wall |6a.

Thebottom of the box receives, in threaded relation therethrough, the hollow internally and externally threaded shanks 65 of handles 66 which are disposed beneath the box between the supporting I-beams These hollow shanks 65 of the handles receive the threaded lower ends of the rods 63 in threaded relation therein. The threads of the rods and the exterior threads on the shanks are of different pitch so that rotation of the handles 66 will raise and lower the nosepiece 64. The double threaded connection between the rods and the box |5 makes possible a micrometer adjustment of the nosespiece 64.

As best shown in Figure 6 the ends of the conduit box I5 have tubular projections 68 and 69 communicating with the wide portions of the conduit passageways l5a and |5b respectively. These tubular projections have flanged ends 66a and 69a receiving, imdetachable relation thereto, elbow pipes 10 and H respectively. As shown in Figure 1, the elbow pipes such as the pipe 16 have outturned flanges such as 10a thereon for abutting the flanges of the tubular projection. Bolt assemblies such as 12 can be provided to detachably connect the elbow pipe with the flanged ends of the tubular projection.

As shown in Figure 2, the elbows 18 and I l are respectively connected through pipe lines 18 and 14 with a T 15 mounted under the stock inlet l8 preferably in the basement beneath the floor F, or in the pit underneath the Fourdrinier machine. The T 15 has the other leg thereof connected to an inlet pipe 16.

As shown in Figure 11 the inlet pipe 18 contains a, valve 11 which can be controlled through rod and gear connections 18 from a hand wheel 18 mounted above the floor F adjacent the stock inlet. Thepipe line 16 extends to a fan type pump 88.

The fan type pump has the suction side 8| thereof connected to a coupling 82 which receives a white water feed pipe 83 from the pit P under the Fourdrinier machine. The other branch of the coupling receives a concentrated stock feed pipe 84 from a stock supply such as a tank 85 or the usual stock screen.

The white water drained through the forming wire FW of the paper machineis collected in the pit P and fed through the pipe line 83 to the pump together with the concentrated stock from the pipe line 84. The pump 88 dilutes the stock with the white water, and thus immediately reuses the white water. As a result of this continual reuse of the white water, large storage equipment for the water is eliminated. The pump discharges the diluted stock through the valve ll which is operated so as to control the feed into the opposite ends of the conduit box i5. The conduit box thus receives the stock into the opposite ends thereof and the stock is caused to flow through the tapering passageways I50 and it!) of the conduit box. Any excess stock reaching the end of the box opposite from the end into which it is introduced can flow through the passageways l5c provided around the ends of the dividing wall for commingling with the incoming stock in the other passageway. As a result, the stock is continuously cross-circulated in opposite directions across the entire width of the machine. The stock is upwardly discharged under pressure through the slot I! provided in the top of the box into the passageway P1. The discharge through the slot I7 is controlled by means of the adjustable nosepiece 64 which acts as a valve for. the slot.

The stock continues to how upwardly through the passageway P1 and around the horizontal baflle 48 into the first compartment A of the surge chamber. The various slices provided in the surge chamber will level oif any pulsations of stock. The driven rectifier rolls in the various bafiles and arrangement of slices will prevent fiber flocculation or fiber settlement in the third chamher. The stock is thus continuously kept in a live condition.

A head of stock can be built up in the surge chamber and the third slice can be so positioned as to maintain a head of stock over the forming wire FW.

In order to obtain increased heads of stock without building up the side walls of the inlet, the top of the surge chamber S. C. can conveniently be covered with a top wall 88 as shown in Figure 9. The top wall can be equipped with a door 81 to vent the surge chamber whenever desired.

A gas such as air is adapted to be introduced into the surge chamber S. C. through a supply line 88 for maintaining the surge chamber under pressure. Theintroduction of air can be controlled by a float operated valve 88 best shown in Figure 10. This valve is controlled by a float 88 adapted to rise and fall with the change in level of stock in the surge chamber. When the level of stock falls in the chamber the float 88 will drop to move a plunger 8| in the valve for opening the air inlet pipe 88 to the interior of the surge chamber. When the plunger is moved to this position a ball check 82 in a vent line 83 is also moved to closed position so that the air is directly introduced into the chamber without loss. However, when the float valve raises, the mouth of the air inlet pipe 88 is closed and the ball check 82 is opened for venting the interior of the third chamber to the atmosphere.

Stock is introduced into the closed type surge chamber in the same manner as described above through the passageway Pi and around the horizontal baiile 48. The slice82 of the open type inlet can be replaced with a simple or vertical bafile 84. The rectifier rolls can be used if desired although the same are not shown in Figure 9.

Water spray devices can be provided in the upper part of the surge chamber S. C. to kill foaming of the stock in the chamber.

The stock will flow under the baflle 84 to the slice 81 and thence onto the forming wire FW.

The closed type of stock inlet illustrated in Figure 9 is readily made from the open type inlet by merely providing a top wall for the surge chamber and by incorporation of an air feed to the resulting closed chamber. The closed surge chamber will operate in the same manner as the open type chamber and avoids the necessity for very high open top chamber in order to maintain desired head pressures of stock.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention and it is, therefore, not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.

We claim as our invention:

1. A stock inlet adapted for a paper making machine having a web forming surface which comprises means defining a stock chamber adapted to communicate at the forward bottom end thereof with a web forming surface of the paper machine, means defining a stock passageway communicating with the bottom rear end of said chamber across the entire width of the chamber, a horizontally disposed baflie movable into said passageway to regulate flow from the passageway to the chamber, means defining conduits beneath the passageway extending in a transverse direction relative to the line of the paper machine, means for flowing paper stock in opposite directions through said conduits, and an adjustable device between the passageway and each of said conduits for controlling stock flow from the conduits into the passageway.

2. A stock inlet for a paper making machine comprising means defining a surge chamber, means defining a vertical stock passage beneath said surge chamber, a horizontally disposed gate between the passage and surge chamber for controlling flow irom the passage to the surge chamber, conduits, for flowing stock in opposite directions beneath said passageway, and means defining a common passageway between the passage and the conduits.

3. A stock inlet comprising a box, a top for said box defining a continuous slot, a partition wall in said box cooperating therewith to provide a pair of conduits therein, and an adjustable valve on said partition wall movable into and out of said slot to control discharge from said conduits through the, slot.

4. A stock inlet for a paper making machine comprising an elongated box disposed diagonally across the width of the paper making machine, stock inlet pipes communicating with opposite ends of said box, a partition in said box extending transversely across the width of the paper machine for dividing the box into a pair of tapered conduits, and a top for said box having a discharge slot disposed over the partition for communicating with each of said conduits along the length thereof.

5. A stock inletv comprising an elongated box, a pair of partition walls in said box dividing the box into a pair of stock conduits extending along the full length of the box and a central chamber, a top for said box defining a discharge slot over said partition walls, an adjustable nose section slidably mounted on the top of the partition walls toward and away from said slot, a plurality of rods depending from the nose section through the central chamber, and means operable from out side of the box for raising and lowering said rods to adjust the nose section. v

6. A stock inlet for a paper making machine comprising an elongated box disposed diagonally across the width of a paper making machine, said box having a discharge slot in the top thereof extending transversely across the width of the paper making machine, means in said box dividing the same into a pair of adjacent tapering conduits, an adjustable nose on said means movable toward and away from said slot to regulate discharge from ach of said conduits through said slot, and stock supply conduits communicating with the wide ends of said tapered conduits in the box.

7. A stock inlet for supplying stock to the upper run of the forming wire of a Fourdrinier type paper making machine which comprises means at for driving said rectifier rolls, means defining a vertical stock passageway communicating with the bottom rear end of said chamber, and means for flowingstock in opposite directions across the width of the paper making machine for simultaneous discharge'across the width of said machine into said passageway.

8. A stock inlet for a Fourdrinier type paper making machine having a breast roll and a forming wire trained therearound which comprises an apron communicating at its forward end with the top of the breast roll, means cooperating with said apron to define a stock chamber, a vertical slice disposed above the upper run of the forming wire, means for shifting said slice in a horizontal direction toward and away from said apron to extend said chamber over the upper run of the forming wire, a verticalstock passageway rearwardly of said apron communicating with the bottom of said chamber, and a horizontally shiftable gate movable over said apron into said passageway to control flow of stock from the passageway into thechamber and to agitate the stock by choking cfi the flow.

9. A stock inlet for a paper making machine including an elongated rectangular box mounted di- 1 agonally across the width of a Fourdrinier type a level above the upper run of the forming wire 1 defining a stock chamber communicating at its forward bottom end with the upper run of the paper machine forming wire, a plurality of vertical slices adjustably mounted in said chamber for dividing the chamber into a plurality of com- 4 partments to hold an appreciable head of stock in at least one compartment, rectifier rolls mounted in said chamber, means on said inlet paper making machine behind the breast roll end thereof, a top for said box having a slot adapted to extend transversely across the width of the paper making machine, a partition wall in said box extending in alignment with said slot, said partition wall terminating short of the end walls of the box to define a pair'of tapering conduits in the box communicating at the ends thereof, and a vertically shiftable nose section mounted on said partition for movement into and out of said slot to join theconduits along their full length with the slot.

-10. The method or feeding stock to the forming surface of a paper machine which comprises flowing streams of stock in opposite directions transversely of the direction of travel of the forming surface, merging stock from the flowing streams along the lengths of the streams, impinging the merged stock against a battle, collecting a pond of the merged stock, introducing air under pressure on top of said pond and discharging stock from the pressured pond onto the forming surface.

LLOYD HORNBOSTEL. EARL E. BERRY.

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