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Apparatus for producing cement building material

  • US 4,944,595 A
  • Filed: 08/19/1988
  • Issued: 07/31/1990
  • Est. Priority Date: 08/19/1988
  • Status: Expired due to Fees
First Claim
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1. In an apparatus for producing cement paste, the apparatus of the type including a hollow generally barrel-shaped enclosure having a bottom and a central longitudinally disposed rotatable shaft and having a feed inlet to receive cement and water and a discharge outlet to dispense the resulting paste, the inner wall of the enclosure including an upper cylindrical portion above and adjacent to a middle conical portion which is above and adjacent to a lower conical portion, the enclosure including a thrust generating assembly having:

  • a downthrust generating component which includes a substantially horizontal set of upper downthrust blades is spaced relationship relative to each other, and a lower set of downthrust blades in a spaced relationship relative to each other, each of such blades having a leading and a trailing edge;

    an upthrust generating component which includes substantially horizontal upper upthrust blades in spaced relationship relative to each other, each of the upper upthrust blades having a leading and a trailing edge and being coupled to one of the substantially horizontal upper downthrust blades outwardly of the upper downthrust blades, and substantially vertical lower upthrust blades in spaced relationship relative to each other, each of such lower upthrust blades having a leading edge and a trailing edge; and

    upper and lower baffles extending from the inner walls of the enclosure toward the shaft, the upper baffle having a lower end and the lower baffle having an upper end, the lower end of the upper baffle and upper end of the lower baffles being spaced from each other providing a baffle space, the lower baffle having a lower free edge, wherein each of the upper upthrust blades is rotatable within the baffle space,the improvement wherein,the ratio of R1 to H1 ranges from 0.39 to 0.45, the ratio of R1 to R2 ranges from 0.80 to 0.83, the ratio of R1 to H2 ranges from 0.59 to 0.61, the ratio of R1 to R3 ranges from 0.36 to 0.41, the ratio of R1 to H3 ranges from 0.30 to 0.32, the ratio of R1 to H2a ranges from 0.001 to 1.0, the ratio of R1 to H3a ranges from 0.001 to 1.0, G1 is 0.20±

    0.124 inches, G5 is 0.25±

    0.125 inches, and V ranges from a height of H1+H2+H3 to H1+H2+H3+4R1,where R1 is the radius of the cylindrical portion of the inner wall of the housing,R2 is the radius of the cylindrical portion of the inner wall of the housing along the horizontal plane containing the upper edge of the lower upthrust blade,R3 is the radius of the lower conical portion of the inner wall of the housing along the horizontal plane containing the lower edge of the lower upthrust blade,H1 is the distance along the shaft between the horizontal plane containing the leading edge of the upper upthrust blade and the horizontal plane containing lower end of the cylindrical portion of the housing,H2 is the distance along the shaft between the horizontal plane containing lower end of the cylindrical portion of the housing and the lower end of the middle conical portion of the housing,H3 is the distance along the shaft between the horizontal plane containing the lower end of the middle portion of the housing and the horizontal plane containing the lower end of the lower conical portion of the housing,H2a is the smallest vertical distance between the upper edge of the lower downthrust blade and the plane containing the largest radius of the middle conical portion,H3a is the smallest vertical distance between the bottom and the lower edge of the lower upthrust blade,G1 is the smallest distance between the leading edge of the upper upthrust blade and the lower edge of the upper baffle,G5 is the smallest distance between the trailing edge of the lower upthrust blade and the lower free edge of the opposing lower baffle, andwherein R1 ranges from 4.0 to 48.0 inches.

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