JP2568183Y2 - Outlet in circle feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet of a circle feeder for powder and granular materials.

[0002]

2. Description of the Related Art Conventionally, a concentric upright bottomed outer cylinder is provided outside an upright inner cylinder, and powder particles are discharged between the two cylinders from the lower end of the upright cylinder using a repose angle, and the inner periphery of the outer cylinder is provided. A circle feeder is used in which the discharged powder and granules are carried by rotating blades provided at equal intervals on a rotating wheel provided along the inside, and discharged from a discharge port provided on a bottom plate between the inner and outer cylinders.

[0003] As shown in Fig. 4, the discharge port has a substantially rectangular opening, and since the opening width is substantially constant, the powder or particles carried by the blades almost drop at the start end of the discharge port. However, since only the material remaining on the blades is scraped off by the scraper provided at the end of the discharge port, there was pulsation in the discharge of the granular material.

[0004] In addition, the rotation speed of the blades is slow during small supply to the weighing machine, so that it takes time until the next blade comes after the blade has passed through the discharge port, further reducing accuracy. .

[0005]

The problem to be solved by the present invention is that the powder discharged between the inner and outer cylinders at the angle of repose is conveyed by the rotating blades to the discharge port without being suddenly dropped and discharged at the start end of the discharge port. It is an object of the present invention to obtain a circle feeder that is gradually discharged to prevent pulsating discharge and that does not affect measuring accuracy even when discharging a small amount (small supply to a weighing machine).

[0006]

In order to achieve the above-mentioned object, the present invention dispenses powdery and granular materials from the lower end of an upright inner cylinder to the bottom plate of an upright outer cylinder outside thereof by using a repose angle, and disposes the powders into a plurality of pieces. In a rotary feeder that discharges from a discharge port provided in a bottom plate by a rotary blade, gradually widens the width of the discharge port in a direction in which the powder or granular material is carried by the blade,
Further, it is constituted by a discharge port in a circle feeder in which the pitch of the blades is formed relatively narrow.

[0007]

In the present invention, when the granular material 4 is charged into the upright inner cylinder 1 and the plurality of rotating blades 5 are rotated along the inner peripheral surface of the upright outer cylinder 2, the above-mentioned outer portion from the lower end of the inner cylinder 1 The powder and granular material 4 discharged while forming the angle of repose θ on the bottom plate 3 of the outer cylinder 2 is carried on the bottom plate 3 between the inner and outer cylinders 1 and 2 by the rotation of the blades 5, and moves. The discharge port 6 is gradually dropped and discharged from the start end of the discharge port 6, and is not pushed and discharged at once by the blade 5 from the start end of the discharge port 6.

Even if the rotation speed of the blade 5 is relatively slow, the pitch p between the blades 5 is relatively small, and the discharge port 6 is gradually widened as described above. Drops can be supplied evenly.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An upright inner cylinder 1 and an upright outer cylinder 2 are provided concentrically on a machine frame, and a payout gap is provided between a lower end of the inner cylinder 1 and a bottom plate 3 of the outer cylinder 2, so that the inner and outer cylinders 1, 2 A circular passage 7 for the powder and granular material 4 discharged between them is formed. At the center of the bottom plate 3, an upper end of an upright rotating shaft 8 provided on the machine frame is protruded, and a plurality of spokes 9 are provided at the upper end, and the tip of the spoke 9 is along the inner peripheral surface of the outer cylinder 2. A turning wheel 10 is provided, and the turning plate 10 is provided with a bottom plate 3.
A plurality of rotary blades 5 are provided at equal intervals along the bottom plate 3 and a discharge port 6 is opened in the passage 7 to form a rotary feeder.

The width of the discharge port 6 (the width in the diameter direction of the inner and outer cylinders 1 and 2) gradually expands in the direction in which the granular material 4 is carried through the passage 7 by the blades 5. That is, as shown in FIG. 3, the outer edge 6 ′ of the discharge port 6 is formed in an arc shape along the inner circumference of the outer cylinder 2, and the inner edge 6 ″ has a start end on the inner peripheral surface side of the outer cylinder 2. The discharge port 6 can be gradually enlarged by inclining toward the outer peripheral surface side of the inner cylinder 1 toward the end.

The pitch p of the blades 5, 5 is made relatively small, so that the particles 4 carried by the blades 5 are not interrupted or uneven when the rotation speed of the blades 5 is low. Things.

Reference numeral 11 in the drawing denotes a scraper for scraping off the residual powder 4 on the blades 5, 12 a flow rate adjusting ring, 13 a motor for driving an inverter variable speed, 14 a speed reducer, and 15 an outer cylinder. A flange for closing the upper end of the inner cylinder 2 and the outer peripheral surface of the inner cylinder 1.

[0013]

Since the present invention is constructed as described above, the pulsation of the granular material 4 dropped and discharged from the discharge port 6 in the rotary feeder is reduced, so that high-precision quantitative supply is possible.

[Brief description of the drawings]

FIG. 1 is a plan view showing an outlet in a circle feeder of the present invention.

FIG. 2 is a vertical sectional front view of FIG.

FIG. 3 is an enlarged plan view of a discharge port.

FIG. 4 is a plan view of a conventional circle feeder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upright inner cylinder 2 Upright outer cylinder 3 Bottom plate θ Angle of repose 4 Granular material 5 Rotating blade 6 Discharge port

Claims (1)

(57) [Scope of request for utility model registration] 1. Using a repose angle, powder particles are discharged from a lower end of an upright inner cylinder to a bottom plate of an upright outer cylinder located outside the inner cylinder, and discharged from a discharge port provided in the bottom plate by a plurality of rotating blades. In a rotary feeder, a discharge port in a circle feeder in which the width of the discharge port is gradually widened in a direction in which the granular material is carried by the blade, and the pitch of the blade is formed relatively small.