US2886216A - Apparatus for metered feeding of granular materials - Google Patents

Apparatus for metered feeding of granular materials Download PDF

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Publication number
US2886216A
US2886216A US530135A US53013555A US2886216A US 2886216 A US2886216 A US 2886216A US 530135 A US530135 A US 530135A US 53013555 A US53013555 A US 53013555A US 2886216 A US2886216 A US 2886216A
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casing
inlet
opening
wheel
outlet
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US530135A
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Oholm Gustav
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Svenska Flaktfabriken AB
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Svenska Flaktfabriken AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00—Loading or unloading
    • B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
    • B65G65/34—Emptying devices
    • B65G65/40—Devices for emptying otherwise than from the top
    • B65G65/48—Devices for emptying otherwise than from the top using other rotating means, e.g. rotating pressure sluices in pneumatic systems
    • B65G65/4881—Devices for emptying otherwise than from the top using other rotating means, e.g. rotating pressure sluices in pneumatic systems rotating about a substantially horizontal axis

Definitions

  • the present invention refers to an apparatus for metered feeding of granular materials, said apparatus consisting of a winged wheel rotatable around a horizontal shaft, the winged wheel being positioned in a cylindrical casing, provided with inlet and outlet openings.
  • a drawback of previously known winged wheels of this type is that during the rotation of the wheel the material often is damaged, owing to the fact that the outer layer near casing is crushed. Particularly when feeding grain and the like this causes a considerable decrease in quality.
  • the object of the present invention is to eliminate this drawback and to operate the wheel with the sections or pockets not entirely filled.
  • the apparatus according to the invention is characterized in that the inlet opening is arranged in the upper quadrant at one side of the cylindrical surface of the casing-when rotating clockwise arranged in the left quadrant and vice versain such way, that a line drawn from the centre of the winged wheel through the upper edge of the inlet opening forms an angle with the horizontal plane smaller than the angle of repose of the material to be fed.
  • the position of the upper edge of the opening may according to a suitable embodiment of the invention be adjustable by means of a movable damper blade.
  • the outlet opening of the apparatus may suitably be positioned in the cylindrical surface of the casing in a quadrant which is situated diametrically opposite to the inlet opening whereby more complete sealing is obtained between the inlet and outlet openings.
  • the apparatus advantageously may be provided with a pipe equalizing the pressure between two openings positioned on each side of the outlet opening at such relative angular distance, that said pipe connects the sector or pocket about to be filled with the sector or pocket about to be emptied.
  • FIG. 1 shows a section of a suitable embodiment of an apparatus for metered feeding of granular material according to the invention.
  • FIG. 5 is a winged wheel rotatable around a horizontal shaft 6.
  • 4 indicates a cylindrical casing around the winged wheel 5.
  • This casing is provided with an inlet opening 1 and an outlet opening 10.
  • the winged Wheel is intended to cause the winged Wheel to rotate clockwise. as indicated by the arrow.
  • the inlet opening is placed in the left quadrant of the casing in such a manner that a line drawn from the centre of the Winged wheel through the upper edge line 16 of the opening forms an angle 15 with the horizontal plane, smaller than the angle of repose 12 of the material 14 to be fed.
  • the difference between the angle 15 and the angle 12 causes a triangular space to be left empty in the pocket.
  • the material in the pocket shifts so that the empty space appears at the top of the winged wheel about the casing.”
  • ing 13 will be at one atmosphere.
  • theposition of said edge line16 may be adjusted by means of, a movable damper blade 2, which by means of the locking device 3 can be adjusted inthe desired position.
  • the upper edge of the inlet opening may beadjusted to accommodate different angles of repose. For example, when the material has a smaller angle of repose, the blade 2 may be adjusted to the dotted line position to insure that the pocket is not completely filled as the wheel rotates past it.
  • the pipe 8 indicates a pipe for the equalizing of pressure between two openings 7 and 13 on each side of the outlet opening and connecting the sector 11, which in turn is to be filled, with the sector 9 in turn to be emptied.
  • the pipe 8 cuts the pressure difierence between the sectors and the openings by approximately one half. For example, if the inlet opening is at three atmospheres of pressure and the outlet opening is at one atmosphere of pressure, the filled sectors traveling from the inlet opening to the opening 7 (will be at three atmospheres.
  • the empty sectors or pockets traveling from the outlet opening to the open- The pipe 8 will equalize the pressures in the sectors as they pass the openings 7 and 13 respectively to approximately two atmospheres so that the pressure difference between the inlet opening and the sector registering with the inlet opening, is reduced to one atmosphere difference, and the pressure difference between the outlet and the filled sector approaching the outlet opening is likewise reduced to one atmosphere. This greatly reduces the ill elfect of a substantial pressure difference at the inlet and outlet opemngs.
  • apparatus for metered feeding of granular material having a given angle of repose, apparatus comprising a casing having a cylindrical wall disposed about ahorizontal axis and generally radial wall means in said cylindrical 'wall defining inlet and outlet openings for the material, said inlet opening being contained within one upper quadrant of said casing defined between horizontal and vertical planes through its axis, a winged wheel having radial wings slidably engaging the cylindrical Wall of said casing and mounted for rotation coaxially within said casing in a generally upward direction in said one upper quadrant, the wings of said winged wheel forming closed pockets by engaging said cylindrical wall'continuously between said inlet and outlet openings to preclude substantial air-leakage between said inlet and outlet openings, said inlet opening being positioned so that a straight line perpendicular to the axis of said casing passing through the uppermost point in said opening forms an angle with said horizontal plane smaller than the said given angle of repose, whereby when eachpocket registers with the inlet opening, the d
  • apparatus comprising a casing having a cylindrical wall disposed about a horizontal axis and generally radial wall means in said casing dc; fininginlet and outlet openings, said inlet and outlet openings being at different pressures and contained within opposite quadrants of said casing defined between horizontal and vertical planes through its axis, said inlet opening being positioned so that a straight line perpendicular to the axis of said casing passing through the uppermost point in said opening forms an angle with said horizontal plane smaller than the said given angle of repose, a winged wheel having generally radial wings slidably engaging the cylindrical wall ofsaid casing and mounted for'rotation eta-axially within said cas ng, the wings of said winged wheel forminga plurality of closed pockets by engaging said eylindrical wall continuously between said inlet and outlet openings to preclude substantial air-leakage between said inlet and outlet openings

Description

G. OHO'LM 2,886,216
APPARATUS FOR METERED FEEDING OF GRANULAR MATERIALS May 12, 1959 Filed Aug. 23, 1955 ammo Uflifid Sees ic v APPARATUS FOR METERED FEEDING OF GRANULAR MATERIALS Gustav onolm, Bromma, Sweden, assignor to Aktiebolaget Svenska Flaktfabriken, Stockholm, Sweden Application August 23,1955, Serial No.530,135
priority, application Sweden August 26, 1954 2 Claims. (Cl. 122-282) The present invention refers to an apparatus for metered feeding of granular materials, said apparatus consisting of a winged wheel rotatable around a horizontal shaft, the winged wheel being positioned in a cylindrical casing, provided with inlet and outlet openings. A drawback of previously known winged wheels of this type is that during the rotation of the wheel the material often is damaged, owing to the fact that the outer layer near casing is crushed. Particularly when feeding grain and the like this causes a considerable decrease in quality. The object of the present invention is to eliminate this drawback and to operate the wheel with the sections or pockets not entirely filled.
The apparatus according to the invention is characterized in that the inlet opening is arranged in the upper quadrant at one side of the cylindrical surface of the casing-when rotating clockwise arranged in the left quadrant and vice versain such way, that a line drawn from the centre of the winged wheel through the upper edge of the inlet opening forms an angle with the horizontal plane smaller than the angle of repose of the material to be fed. The position of the upper edge of the opening may according to a suitable embodiment of the invention be adjustable by means of a movable damper blade. The outlet opening of the apparatus may suitably be positioned in the cylindrical surface of the casing in a quadrant which is situated diametrically opposite to the inlet opening whereby more complete sealing is obtained between the inlet and outlet openings. For the purpose of equalizing the pressure difierence, if any, the apparatus advantageously may be provided with a pipe equalizing the pressure between two openings positioned on each side of the outlet opening at such relative angular distance, that said pipe connects the sector or pocket about to be filled with the sector or pocket about to be emptied.
The invention will now be described more in detail with reference to the accompanying drawing. The figure shows a section of a suitable embodiment of an apparatus for metered feeding of granular material according to the invention.
In the drawing 5 is a winged wheel rotatable around a horizontal shaft 6. 4 indicates a cylindrical casing around the winged wheel 5. This casing is provided with an inlet opening 1 and an outlet opening 10. In the illustrated embodiment it is intended to cause the winged Wheel to rotate clockwise. as indicated by the arrow. According to the drawing the inlet opening is placed in the left quadrant of the casing in such a manner that a line drawn from the centre of the Winged wheel through the upper edge line 16 of the opening forms an angle 15 with the horizontal plane, smaller than the angle of repose 12 of the material 14 to be fed. With reference to the drawing, it is noted that the difference between the angle 15 and the angle 12 causes a triangular space to be left empty in the pocket. As the wheel 5 rotates clockwise, the material in the pocket shifts so that the empty space appears at the top of the winged wheel about the casing."
ing 13 will be at one atmosphere.
S'from the granular material and thereby prevents crushing of the materialv between the wings and the cylindrical wall of the casing 4. Thus; this construction effectively prevents crushing of the material as it travels with'the According to a suitable embodiment theposition of said edge line16 may be adjusted by means of, a movable damper blade 2, which by means of the locking device 3 can be adjusted inthe desired position.
Thus, by adjusting the damper blade 2, the upper edge of the inlet opening may beadjusted to accommodate different angles of repose. For example, when the material has a smaller angle of repose, the blade 2 may be adjusted to the dotted line position to insure that the pocket is not completely filled as the wheel rotates past it.
8 indicates a pipe for the equalizing of pressure between two openings 7 and 13 on each side of the outlet opening and connecting the sector 11, which in turn is to be filled, with the sector 9 in turn to be emptied. Thus, if there is a substantial pressure difference between the inlet and outlet openings, the pipe 8 cuts the pressure difierence between the sectors and the openings by approximately one half. For example, if the inlet opening is at three atmospheres of pressure and the outlet opening is at one atmosphere of pressure, the filled sectors traveling from the inlet opening to the opening 7 (will be at three atmospheres. Likewise, the empty sectors or pockets traveling from the outlet opening to the open- The pipe 8 will equalize the pressures in the sectors as they pass the openings 7 and 13 respectively to approximately two atmospheres so that the pressure difference between the inlet opening and the sector registering with the inlet opening, is reduced to one atmosphere difference, and the pressure difference between the outlet and the filled sector approaching the outlet opening is likewise reduced to one atmosphere. This greatly reduces the ill elfect of a substantial pressure difference at the inlet and outlet opemngs.
Modifications of the present invention certainly are possible within the scope of the invention.
What I claim:
1. For metered feeding of granular material having a given angle of repose, apparatus comprising a casing having a cylindrical wall disposed about ahorizontal axis and generally radial wall means in said cylindrical 'wall defining inlet and outlet openings for the material, said inlet opening being contained within one upper quadrant of said casing defined between horizontal and vertical planes through its axis, a winged wheel having radial wings slidably engaging the cylindrical Wall of said casing and mounted for rotation coaxially within said casing in a generally upward direction in said one upper quadrant, the wings of said winged wheel forming closed pockets by engaging said cylindrical wall'continuously between said inlet and outlet openings to preclude substantial air-leakage between said inlet and outlet openings, said inlet opening being positioned so that a straight line perpendicular to the axis of said casing passing through the uppermost point in said opening forms an angle with said horizontal plane smaller than the said given angle of repose, whereby when eachpocket registers with the inlet opening, the difierence in angles causes an open space at the top of the pocket which frees the upper edge of the pocket from the granular material and prevents crushing of the same between the wheel and the cylindrical wall as the wheel rotates, and an adjustable damper blade to adjust the uppermost point in said opening to accommodate materials having different angles of repose.
H rai m a, May 12, .1959
2- F9! anged findin 9? $22 .41?! ma i having a given angle of repose, apparatus comprising a casing having a cylindrical wall disposed about a horizontal axis and generally radial wall means in said casing dc; fininginlet and outlet openings, said inlet and outlet openings being at different pressures and contained within opposite quadrants of said casing defined between horizontal and vertical planes through its axis, said inlet opening being positioned so that a straight line perpendicular to the axis of said casing passing through the uppermost point in said opening forms an angle with said horizontal plane smaller than the said given angle of repose, a winged wheel having generally radial wings slidably engaging the cylindrical wall ofsaid casing and mounted for'rotation eta-axially within said cas ng, the wings of said winged wheel forminga plurality of closed pockets by engaging said eylindrical wall continuously between said inlet and outlet openings to preclude substantial air-leakage between said inlet and outlet openings, and conduit means opening into said casing to interconnect a filled pocket passing from said inlet toward said outlet opening with an emptied pocket passing from said outlet toward said inlet opening to equalize the pressure in said pockets.
RejerencesCited in the file of this patent UNITED STATES PATENTS 1,061,400 Pelton May 13, 1913 1,370,764 Pokess Mar. v8, 1921 1,437,863 Raymond Dec. 5, 19.22 1,723,211 Schmidt Aug. 6, 1929
US530135A 1954-08-26 1955-08-23 Apparatus for metered feeding of granular materials Expired - Lifetime US2886216A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027053A (en) * 1959-03-12 1962-03-27 Dominick M Aluotto Dispensing device with means to return material to supply
US3574411A (en) * 1969-01-15 1971-04-13 Sprout Waldron & Co Inc Side inlet rotary valve
US3704815A (en) * 1970-02-16 1972-12-05 Hoffman Mfg Co Apparatus for filling material into and discharging material from compartments
US3830357A (en) * 1973-07-02 1974-08-20 Yuba City Steel Prod Co Article receiving and handling system
US3970224A (en) * 1972-06-22 1976-07-20 National Research Development Corporation Spoil removal devices for tunnelling machines
US3971303A (en) * 1975-02-24 1976-07-27 Malt-O-Meal Company Apparatus for continuous puffing
US4111493A (en) * 1977-03-16 1978-09-05 Henry Sperber Feeding apparatus for a pneumatic conveying system
US4459999A (en) * 1980-10-23 1984-07-17 Rothmans Of Pall Mall Canada Limited Cigarette maker feeder
US4940131A (en) * 1988-05-12 1990-07-10 Delaware Investments, Inc. Material handling system and control valve thereof
US5009551A (en) * 1988-05-12 1991-04-23 Delaware Investments Corp. Material handling system and control valve therefor
US5678971A (en) * 1993-03-26 1997-10-21 Hiorth; Hans Pressure-tight sluice
US6471447B1 (en) 2001-04-09 2002-10-29 Frank Salley Rotary air lock feeder with improved material intake and discharge
US11656113B2 (en) * 2019-07-19 2023-05-23 Agra Industries, Inc. Bulk material metering system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1061400A (en) * 1910-12-27 1913-05-13 Thomas Mfg Company Fertilizer-distributer.
US1370764A (en) * 1917-05-14 1921-03-08 Bituminized Road Company Conveying and mixing machine
US1437863A (en) * 1920-08-10 1922-12-05 Raymond Brothers Impact Pulver Feeding device
US1723211A (en) * 1924-08-01 1929-08-06 Sprague Sells Corp Apparatus for handling granular material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1061400A (en) * 1910-12-27 1913-05-13 Thomas Mfg Company Fertilizer-distributer.
US1370764A (en) * 1917-05-14 1921-03-08 Bituminized Road Company Conveying and mixing machine
US1437863A (en) * 1920-08-10 1922-12-05 Raymond Brothers Impact Pulver Feeding device
US1723211A (en) * 1924-08-01 1929-08-06 Sprague Sells Corp Apparatus for handling granular material

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027053A (en) * 1959-03-12 1962-03-27 Dominick M Aluotto Dispensing device with means to return material to supply
US3574411A (en) * 1969-01-15 1971-04-13 Sprout Waldron & Co Inc Side inlet rotary valve
US3704815A (en) * 1970-02-16 1972-12-05 Hoffman Mfg Co Apparatus for filling material into and discharging material from compartments
US3970224A (en) * 1972-06-22 1976-07-20 National Research Development Corporation Spoil removal devices for tunnelling machines
US3830357A (en) * 1973-07-02 1974-08-20 Yuba City Steel Prod Co Article receiving and handling system
US3971303A (en) * 1975-02-24 1976-07-27 Malt-O-Meal Company Apparatus for continuous puffing
US4111493A (en) * 1977-03-16 1978-09-05 Henry Sperber Feeding apparatus for a pneumatic conveying system
US4459999A (en) * 1980-10-23 1984-07-17 Rothmans Of Pall Mall Canada Limited Cigarette maker feeder
US4940131A (en) * 1988-05-12 1990-07-10 Delaware Investments, Inc. Material handling system and control valve thereof
US5009551A (en) * 1988-05-12 1991-04-23 Delaware Investments Corp. Material handling system and control valve therefor
US5678971A (en) * 1993-03-26 1997-10-21 Hiorth; Hans Pressure-tight sluice
US6471447B1 (en) 2001-04-09 2002-10-29 Frank Salley Rotary air lock feeder with improved material intake and discharge
US6669411B2 (en) 2001-04-09 2003-12-30 Francis Walker Salley, Jr. Rotary air lock feeder with improved material intake and discharge
US11656113B2 (en) * 2019-07-19 2023-05-23 Agra Industries, Inc. Bulk material metering system

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