Cleaning sterilization apparatus for topsoil

• US 5,776,422 A
• Filed: 03/12/1996
• Issued: 07/07/1998
• Est. Priority Date: 12/27/1995
• Status: Expired due to Fees

• Current Assignee: Ushiki & Co.
• Original Assignee: K K Key & Kraft
• Inventors: Kawasaki, Seiji
• Primary Examiner(s): JASTRZAB, KRISANNE MARIE
• Application Number:
  US08/614,416
• Time in Patent Office: 847 Days
• Field of Search: 422/307-309, 47/1.42, 43/140
• US Class Current: 422/307
• CPC Class Codes: A01M 17/00 Apparatus for the destruction of vermin in soil or in foodstuffs injecting fertilisers into the roots of trees A01G29/00
• CPC Class Codes: A61L 11/00 Methods specially adapted for refuse disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00
• CPC Class Codes: A61L 2/04 Heat A61L2/08 takes precedence

Abstract

A cleaning sterilization apparatus for topsoil which includes: an apparatus body provided with crawlers for traveling over a ground surface and an engine for driving the crawlers; an intake apparatus for taking up the topsoil into the apparatus body; a separating apparatus for removing foreign matters from the soil; a heat sterilization apparatus for thermally sterilizing the topsoil thus separated; and a discharge port constituting for discharging the topsoil sterilized by the heat sterilization apparatus out of the apparatus body; the intake apparatus being provided at a lower portion thereof with an intake port to be moved up and down.

Claims

1. A cleaning sterilization apparatus for topsoil which comprises:

an apparatus body having a lower portion with means for traveling over a ground surface;

a driving means mounted on said apparatus body, for driving said means for traveling;

an intake means positioned at a forward side of said apparatus body, for taking up the topsoil into the apparatus body;

a separating means provided in said apparatus body for separating and removing foreign matter from the soil taken up by the intake means;

a heat sterilization means provided in said apparatus body for thermally sterilizing the topsoil separated by the separating means; and

,

a discharge port provided in said apparatus body for discharging the sterilized topsoil out of the apparatus body;

wherein said intake means further comprises;

at least one screw conveyor having an elongated cylindrical body, said cylindrical body having a lower end side wall with a portion that is open in a forward direction of travel for the apparatus to form a topsoil intake port, said screw conveyor also having a spiral vane mounted for rotation around an axis extending longitudinally through said cylindrical body, said spiral vane extending to the intake port for contact with the topsoil, and said screw conveyor having a motor for rotating said spiral vane while in contact with the topsoil to convey topsoil upward; and

elevation equipment provided at a front side of said apparatus body for moving said intake screw conveyor axially and substantially vertically downward into the topsoil, said elevation equipment also being operable for moving the intake screw conveyor upward and out of the topsoil.

2. A cleaning sterilization apparatus according to claim 1, wherein two screw conveyors are provided, said screw conveyors being paired and mounted to said elevation equipment, the screw conveyors having first and second respective spiral vanes spirally directed in opposite directions relative to each other, and wherein said first spiral vane is rotated in one rotational direction and wherein said second spiral vane is rotated in a second rotational direction opposite the first rotational direction while the topsoil is conveyed upwardly by the respective conveyors.

3. A cleaning sterilization apparatus according to claim 1, wherein said separating means is provided with a sieve and with a vibrating means for vibrating the sieve.

4. A cleaning sterilization apparatus according to claim 3, which further comprises a crushing means for crushing the topsoil taken up by the intake port, said crushing means crushing clods included in the topsoil prior to sieving the same with the use of said sieve.

12. A cleaning sterilization apparatus according to claim 1, wherein said heat sterilization means comprises:

a heating chamber provided in said apparatus body;

a plurality of cylindrical bodies for conveying the topsoil, said cylindrical bodies being laterally disposed in parallel in said heating chamber;

a spiral vane rotatably provided in each of said cylindrical bodies;

rotating means for rotating said spiral vane in each of said cylindrical bodies, wherein each spiral vane is so formed and rotated, so as to convey the topsoil in opposite longitudinal directions with respect to the adjacent cylindrical bodies; and

heating means for heating outer surfaces of said cylindrical bodies,

wherein a first one of said adjacent cylindrical bodies discharges topsoil to a second one of said adjacent cylindrical bodies towards one end of said first and second adjacent cylindrical bodies, and wherein said second one of said adjacent cylindrical bodies receives the topsoil and conveys the topsoil to an opposite end for transfer to a next adjacent cylindrical body.

13. A cleaning sterilization apparatus according to claim 12, wherein said adjacent spiral vanes have at least respective portions formed to spiral in opposite rotational directions, and wherein said rotating means is operable for rotating said spiral vane in each of said cylindrical bodies in the same rotational direction, for conveying the topsoil in opposite longitudinal directions in said adjacent cylindrical bodies, and

wherein said heating means comprises a plurality of burners, said plurality of burners being disposed below said plurality of cylindrical bodies within said heating chamber.

5. A cleaning sterilization apparatus for topsoil which comprises:

an apparatus body provided at its lower portion with means for traveling over a ground surface;

a driving means mounted on said apparatus body, for driving said means for traveling;

an intake means provided at a forward side of said apparatus body, for taking up the topsoil into the apparatus body;

a separating means provided in said apparatus body for separating and removing foreign matter from the soil taken up by the intake means;

a heat sterilization means provided in said apparatus body for thermally sterilizing the topsoil separated by the separating means, and

a discharge port provided in said apparatus body for discharging the sterilized topsoil out of the apparatus body,

wherein said heat sterilization apparatus further comprises;

a heating chamber provided in said apparatus body;

a plurality of heating compartments provided inside said heating chamber, each of said heating compartments being approximately cylindrical in shape for receiving the topsoil and each of said heating compartments having a bottom and a heating plate disposed horizontally at said bottom;

a central axis vertically provided at the center of each heating plate;

a plurality of blades radially extending from said central axis and adapted to rotate around said central axis and along an upper surface of each heating plate;

rotating means for rotating the blades to convey the topsoil along the upper surface of each heating plate;

heating means for heating a lower surface of each heating plate; and

a port being provided in each heating plate for allowing the topsoil heated by said heating plate to drop therethrough.

6. A cleaning sterilization apparatus according to claim 5, wherein said central axis is rotatably provided within said heating chamber, and around and coaxially with said central axis is provided an inner cylinder at a center of said heating plates, said inner cylinder extending upward, and wherein each of said blades is provided at a proximal end thereof with a portion secured to the central axis, and

wherein said rotating means further comprises a motor.

7. A cleaning sterilization apparatus according to claim 5, wherein said heating chamber is provided therein with said heating compartments formed in multiple stages from an uppermost heating compartment to a lowermost heating compartment, and wherein said heating means further comprises at least one burner disposed below the lowermost heating compartment.

8. A cleaning sterilization apparatus according to claim 7, wherein said at least one port in each respective heating plate is disposed one revolution of said blades less one port position from the port immediately above each respective heating plate.

9. A cleaning sterilization apparatus according to claim 5, wherein said blades are each provided with a sliding member adapted to slide on an upper surface of the heating plate.

10. A cleaning sterilization apparatus according to claim 9, wherein said sliding member includes a brush.

11. A cleaning sterilization apparatus according to claim 8, wherein each of said compartments is partitioned by a divider plate with an outer circumference thereof being contacted by an inner surface of said heating chamber to be fixed thereto without any gap, said divider plate having a hot air hole in a center of said divider plate, wherein one of said heating compartments is positioned above said divider plate, wherein one of said heating compartments is positioned below said divider plate, and wherein said hot air hole in the center of said divider plate provides communication between said one of said heating compartments positioned above said divider plate, and said one of said heating compartments positioned below said divider plate.