US3598698A - Flow spreading device - Google Patents

Flow spreading device Download PDF

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Publication number
US3598698A
US3598698A US767449A US3598698DA US3598698A US 3598698 A US3598698 A US 3598698A US 767449 A US767449 A US 767449A US 3598698D A US3598698D A US 3598698DA US 3598698 A US3598698 A US 3598698A
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US
United States
Prior art keywords
tank
stock
inlet
tubes
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US767449A
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English (en)
Inventor
Denis A Goddard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beloit Corp
Original Assignee
Beloit Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beloit Corp filed Critical Beloit Corp
Application granted granted Critical
Publication of US3598698A publication Critical patent/US3598698A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper

Definitions

  • a device for transferring stock comprising inlet means adapted to receive stock from a source, tank means adapted to receive stock from said inlet means, said inlet means being attached to said tank and positioned partially interiorly of said tank, wall means forming a part of said tank means and positioned perpendicular to the direction of flow of stock from said inlet means to form stock direction changing means, outlet means adapted to remove stock from said tank, outlet means being attached to said tank and positioned partially interiorly of said tank and pressure means attached to said tank and adapted to create a pressure in said tank greater than the pressure downstream from said outlet to form means for moving stock through said outlet means.
  • Said outlet means comprising a plurality of uniformly spaced uniformly sized tubes extending from within said tank to a point exterior of said tank.
  • the inlet means is preferably a plurality of tubes extending into the tank.
  • the inlet means further includes a header in communication with the inlet tubes at a point exterior of said tank and adapted to pass stock in a direction perpendicular to the tubes and drain the tank.
  • the header is tapered such that the cross-sectional area of the header decreases in the direction of stock flow in said header means.
  • suspensions of cellulosic fibers in water require certain outside forces to maintain a uniform and uncoagulated suspension.
  • Dilute solutions in the range of one to five percent cellulosic fibers in water undergo flocculation, coagulation and other phenomena which disrupt the uniformity of the suspension.
  • the invention comprises the use of an inlet means adapted to receive stock from a source, a tank means adapted to receive stock from the inlet means, whereby the inlet means is attached to the tank and positioned partially interior to the tank, and where the tank includes wall means forming a part of the tank and positioned perpendicular to the direction of flow of the stock through the inlet means. Further provided are outlet means adapted to remove stock from the tank, where the outlet means are also attached to the tank and positioned partially interior of the tank. Finally, pressure means are provided to create a pressure within the tank greater than the pressure downstream from the outlet to form means for moving the stock through the outlet means.
  • the figure represents a schematic section view of the preferred embodiment of the present invention.
  • an inlet means 11 is adapted to transfer stock from a source hereinafter described.
  • the inlet means 11 consists of a plurality of tubes extending into the tank.
  • the tank itself is defined by sidewalls 12, bottom wall 13 (upon which the inlet tubes 10 are attached) and top wall 14.
  • a wall means 16 Positioned within the tank and attached to the sidewall 12 is a wall means 16 which forms a part of the tank means and is positioned perpendicular to the direction of flow 11 from the inlet means 10.
  • This wall means 16 positioned perpendicular to the flow 11 of the stock through the inlet 10 forms a stock direction changing means.
  • outlet means 18 which are adapted to remove stock from the tank.
  • the outlet means 18 are attached to the tank at wall 14 and are positioned partially interiorly of the tank.
  • the outlet means 18 comprises a plurality of uniformly spaced, uniformly sized tubes extending from within the tank to a point 22 exterior of the tank.
  • the purpose of the uniformity of spacing and size is to provide a uniform distribution of the material or stock as it leaves the tank through the outlet means 18.
  • a pressure means comprising a pump 20 and a pressure inlet 21 which is attached to the sidewall 12 of the tank and is adapted to create a pressure within the tank above the stock level 17 which is greater than the pressure downstream of the outlet 18 at a point 22 exterior of the tank, thereby forming means for moving stock to the outlet means 18.
  • a header attached to the inlet means and positioned exterior of the tank. Shown in the figure, is a header 26 which is tapered from a cross-sectional area at point shown by 26 down to a header size of smaller cross-sectional area at the other end 26a. Of course, it is necessary to flow stock in the direction of the decrease of cross-sectional area.
  • stock would flow through the header in the direction of decreasing cross-sectional area.
  • a quantity of stock would also pass upwards through the plurality of inlet tubes 10 in the direction shown by arrow 11.
  • the stock would impinge upon the perpendicular wall means 16, thereby causing a change in the direction of flow of the stock.
  • the stock would collect in the tank and would rise to a level shown by level 17.
  • the pump 20 would cause a flow of air pressure or other pressure forming means through line 21 to cause or create a pressure inside the tank which is greater than the pressure at a point exterior the tank 22 downstream from the outlet.
  • the stock would then pass through the outlet tubes 18, which tubes would cause a uniform spreading of the stock across the entire width of the walls 12 and therefore permit the uniform distribution of stock to the headbox 24. All pulses and other irregularities in flow caused by the treatment of the stock prior to the inlet tubes 10 would be dissipated by impingement of the stock on the perpendicular wall 16 and result in holding time at which any one portion of the stock would be kept within the tank. Exiting of the stock through the outlet tubes 18 would redisperse any portion of the stock which had become nonuniform in suspension, and, since the outlet tubes 18 would be drawing from a constant pressure force, there would be no pulsation or surges in the flow through the tubes 18.
  • a headbox assembly for a papermaking machine comprising in combination:
  • an inlet header for stock flow having inlet tubes
  • a pulse modulating tank having said inlet tubes connected to discharge into the tank
  • a stationary stock impingement wall in said tank positioned to receive and disperse stock discharged from the tubes
  • a stock receiving headbox for delivering the stock to a slice for distributing the stock to a traveling forming surface

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  • Paper (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Noodles (AREA)
US767449A 1968-10-14 1968-10-14 Flow spreading device Expired - Lifetime US3598698A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76744968A 1968-10-14 1968-10-14

Publications (1)

Publication Number Publication Date
US3598698A true US3598698A (en) 1971-08-10

Family

ID=25079520

Family Applications (1)

Application Number Title Priority Date Filing Date
US767449A Expired - Lifetime US3598698A (en) 1968-10-14 1968-10-14 Flow spreading device

Country Status (8)

Country Link
US (1) US3598698A (es)
BR (1) BR6913251D0 (es)
DE (1) DE1951649A1 (es)
ES (1) ES372471A1 (es)
FI (1) FI49855C (es)
FR (1) FR2020610A1 (es)
GB (1) GB1276322A (es)
SE (1) SE363652C (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923569A (en) * 1988-05-27 1990-05-08 Valmet-Ahlstrom, Inc. Hydraulic headbox with air attenuation chamber located under the stock flow route

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923569A (en) * 1988-05-27 1990-05-08 Valmet-Ahlstrom, Inc. Hydraulic headbox with air attenuation chamber located under the stock flow route

Also Published As

Publication number Publication date
FI49855C (fi) 1975-10-10
FR2020610A1 (es) 1970-07-17
DE1951649A1 (de) 1970-04-23
FI49855B (es) 1975-06-30
SE363652B (es) 1974-01-28
BR6913251D0 (pt) 1973-01-09
SE363652C (sv) 1976-04-12
GB1276322A (en) 1972-06-01
ES372471A1 (es) 1971-10-16

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