JPH06255794A - Powder/grain feeder in skirt silo - Google Patents

Abstract

PURPOSE:To provide a powder/grain feeder by which installation or maintenance becomes easy in a simple structure and a bridge is hard to be caused by using a cylindrical skirt of a skirt silo and a conical hopper part as a part of a power/grain feeder. CONSTITUTION:In a skirt silo constituted in such a way that a vertical cylinder 13 is supported with the floor surface 12, and the upper end of an inverted truncated cone shape hopper 1 is connected (3) to the inner peripheral surface of the cylinder 13, and a cylindrical skirt 6 being the lower part of the vertical cylinder is formed under the connecting part (3), a bottom plate 2 is arranged just under the lower end opening part 1' of the hopper 1, and the outer periphery of a bottom plate 2 is connected (3) to the inner peripheral surface of the skirt 6, and a central rotary blade 5 running along the upper surface of the bottom plate is arranged on a vertical rotary shaft 4 arranged in the central part of the bottom plate 2. A rotary ring 7 running along the inner peripheral surface of the cylindrical skirt 6 is arranged on the outer end of the blade 5, and an outer peripheral rotary blade running toward the central part of the bottom plate 2 is arranged in the ring 7, and a ring shape powder/grain transferring passage 9 is formed between the hopper 1 and the cylindrical skirt 6, and a discharge port 10 is arranged in the passage 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder feeder in a skirt silo in which a hopper is connected to the inside of an upright cylinder and a cylindrical skirt is formed below the connecting portion by the lower part of the upright cylinder.

[0002]

2. Description of the Related Art Conventionally, when a powder feeder is installed in a skirt silo, it cannot be carried into the silo without dividing the feeder into a plurality of feeders. Further, there is a problem that a bridge is apt to occur because it is necessary to narrow the outer peripheral portion (annular transfer space) of the feeder from the distance between the skirt portion of the silo and the conical hopper portion or reduce the diameter of the conical hopper portion. .

For example, in the case of a silo with a diameter of 3,000 mm, the diameter of the conical hopper is 3000- (500 × 2) -when the conventional feeder has an installation / maintenance space of 500 mm and a transportation width (ring-shaped transportation space) of 275 mm. (275 x 2) = 1450 * The caliber is φ1400 mm, that is, 1400/3000 x 100 ≈ 47%, and the diameter of the bottom opening of the conical hopper is 47 with respect to the skirt diameter.
%Met.

[0004]

SUMMARY OF THE INVENTION The present invention utilizes the skirt portion of a skirt silo and the conical hopper portion as a case of a powder feeder, which has a simple structure and is easy to install and maintain, and which causes a bridge. The purpose is to obtain a difficult powder feeder.

[0005]

In order to achieve the above object, the present invention supports an upright cylinder on a floor surface, and connects an upper end edge of an inverted truncated cone hopper to an inner peripheral surface of the cylinder, and the connection. In a skirt silo formed by forming a cylindrical skirt by the lower part of the upright cylinder below the portion, a bottom plate is arranged immediately below the lower end opening of the hopper, and the outer peripheral edge of the bottom plate is connected to the inner peripheral surface of the skirt. Then, a central rotating blade along the upper surface of the bottom plate is provided on an upright rotating shaft provided at the center of the bottom plate, and a rotating ring along the inner peripheral surface of the cylindrical skirt is provided at the outer end of the blade, and the center of the bottom plate is provided on the ring. Particulate material feeder in a skirt silo in which a ring-shaped transfer passage for powder and granules is formed between the hopper and the cylindrical skirt by providing an outer peripheral rotary vane facing the portion and a discharge port is provided in the passage. Connect a short cylinder to the bottom opening The powder feeder in the skirt silo according to the invention described above. A supporting frame is installed on a cylindrical skirt, a bottom plate is supported on the supporting frame, and the bottom plate is composed of a plurality of divided bottom plates. It is composed of powder feeders in skirt silos.

[0006]

In the present invention, in the conventional skirt silo,
When the powder or granules are stored in the upright cylinder 13, the powder or granules 14 are stored on the bottom plate 2 from the lower end opening 1 ′ of the inverted truncated conical hopper 1, and the ring shape is formed between the lower end opening 1 ′ and the bottom plate 2. An angle of repose α is formed on the transfer passage 9 and is discharged.

When the upright rotary shaft 4 is rotated in this state, the central rotary blade 5, the rotary ring 7 and the outer rotary blade 8 rotate in one direction along the inner circumference of the cylindrical skirt 6, and the payout powder on the passage 9 is discharged. The granules 14 can be transferred along the inner peripheral surface of the cylindrical skirt 6 and continuously discharged from the discharge port 10 in a fixed amount.

The outer circumference of the granular material ring-shaped transfer passage 9 coincides with the inner circumference of the cylindrical skirt 6, and the lower end opening 1'of the inverted truncated conical hopper 1 is exposed to the inner circumference of the ring-shaped transfer passage 9. Moreover, the diameter of the bottom plate 2 is matched with the inner diameter of the cylindrical skirt 6.

[0009]

EXAMPLE A skirt silo is established by fixing the lower end of an upright cylinder 13 on a concrete floor 12 with an anchor. At the lower part of the upright cylinder 13, an inner surface of the inverted truncated cone hopper 1 is provided.
Connect the upper edge of the (conical hopper) 3 by welding,
Below the connecting part 3 the lower part of the upright cylinder 13 is formed as a cylindrical skirt 6.

The lower end opening 1'of the hopper 1 is an inclined lower end as shown in FIG. 1 or a short cylinder 1 "is connected as shown in FIG. 2. Immediately below this lower end opening 1 '. 4, the supporting frame 11 is directly installed on the cylindrical skirt 6 as shown in FIG. 4, and the divided bottom plates 2 ′, 2 ′ are placed on the supporting frame 11,
The bottom plate 2 is assembled and the outer peripheral edge of the bottom plate 2 is integrally connected 3 to the inner peripheral surface of the cylindrical skirt 6 by welding. An upright rotation shaft 4 is provided at the center of the bottom plate 2 so that it can be rotated by a drive device 15 provided on the support frame 11.

The rotary shaft 4 is provided with four central rotary blades 5 extending along the upper surface of the bottom plate 2, and the rotary ring 7 extending along the inner peripheral surface of the cylindrical skirt 6 is provided at the outer end thereof. Therefore, the rotary ring 7 is provided with short outer peripheral rotary blades 8 facing the central portion of the bottom plate 2 at equal intervals, and the powdery-particle-shaped annular transfer passage 9 formed between the hopper 1 and the cylindrical skirt 6 is provided.
The powder or granular material 14 discharged to the above can be transferred by the outer peripheral rotary blade 8 along the passage 9 and can be continuously discharged quantitatively from the discharge port 10 to form a powder and granular material quantitative feeder.

Assuming that the inner diameter of the cylindrical skirt 6 is 3000 and the width of the annular transfer passage is 275, 3000- (275 × 2) = 2450 ......... The diameter of the lower end opening 2450 ÷ 3000 × 100 = 81% 2 is a reduction gear, 17 is an electric motor, 18 is a safety cover, 19 is a support frame mounting bracket, 2 in FIG.
Reference numeral 0 is a flow control ring.

[0013]

Since the present invention is configured as described above, not only can the powder feeder of the skirt silo having a simple structure and being easy to install and maintain can be obtained, but the width of the ring-shaped transfer passage 9 can be reduced. Since the lower end opening portion 1'of the conical hopper portion 1 can be enlarged without narrowing, there is an effect that the clogging phenomenon due to the bridge hardly occurs.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a powder feeder of a skirt silo of the present invention.

FIG. 2 is a vertical sectional view of a lower end opening.

FIG. 3 is a plan view taken along the line AA of FIG.

FIG. 4 is a plan view taken along the line BB of FIG.

FIG. 5 is a vertical sectional view of a conventional feeder.

FIG. 6 is a plan view taken along the line CC of FIG.

[Explanation of symbols]

 1 Inverted frusto-conical hopper 1'Lower end opening 1 "Short cylinder 2 Bottom plate 2'Divided bottom plate 3 Connection part 4 Upright rotating shaft 5 Central rotating blade 6 Cylindrical skirt 7 Rotating ring 8 Peripheral rotating blade 9 Granule ring transfer Passage 10 Discharge port 11 Support frame

Claims (3)

[Claims] 1. An upright cylinder is supported on a floor surface, an upper end edge of an inverted truncated conical hopper is connected to an inner peripheral surface of the cylinder, and a cylindrical skirt formed by a lower portion of the upright cylinder is below the connecting portion. In the formed skirt silo, the bottom plate is arranged immediately below the lower end opening of the hopper, the outer peripheral edge of the bottom plate is connected to the inner peripheral surface of the skirt, and the upright rotation shaft provided at the center of the bottom plate is connected. A central rotary blade is provided along the upper surface of the bottom plate, and a rotary ring is provided at the outer end of the blade along the inner peripheral surface of the cylindrical skirt.
A ring-shaped transfer passage is formed between the hopper and the cylindrical skirt by providing the ring with an outer peripheral rotary blade facing the central portion of the bottom plate, and a powder in a skirt silo provided with a discharge port in the passage. Feida. 2. The powder feeder for a skirt silo according to claim 1, wherein a short cylinder is connected to the lower end of the hopper to form a lower end opening. 3. A powdery or granular material in a skirt silo according to claim 1 or 2, wherein a support frame is installed on a cylindrical skirt, a bottom plate is supported on the support frame, and the bottom plate is composed of a plurality of divided bottom plates. Feida.