JPH01279085A - Feeder for powder and granules - Google Patents

Abstract

PURPOSE:To enable a height adjustment of a hopper without change in volume thereof and evenly and continuously discharge powder material from the hopper having a reverse frustoconical shape, by providing a plurality of small scrapers on an inner surface of a wheel such that the scrapers are extended radially inwardly therefrom and disposed in parallel with a bottom plate. CONSTITUTION:An upright rotating shaft 7 is disposed in the center of a bottom plate 3. A wheel 9 is connected through spokes 8 the rotating shaft 7 and the outer circumference of the wheel 9 is located along the inside of a cylindrical wall 2. A plurality of small scrapers 10 are extended radially inwardly from the inside surface of the wheel 9 in an equally spaced relation and in parallel to the bottom plate 3. When the upright rotating shaft operates, the powder material in the center region of the hopper 1 is moved toward the side of a gap (t) by means of the rotating spokes 8 while the powder material flowed into a space 5 is transported by the rotating small scrapers 10 to an outlet port 6 through which the powder material is then discharged to the outside of the hopper 1. Since the powder material located in the proximity of the inner conical surface 1'' of the hopper 1 is promoted to flow out through the gap (t) into the space 5, all the powder material in the hopper is lowered evenly in both the central and peripheral regions.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a circle feeder (rotary feeder) for powder, granules, etc.

``Prior Art'' Conventionally, powdered material put into an inverted conical cylindrical hopper is discharged by opening an opening/closing gate or shutter provided at the lower end opening. However, inside the hopper, the descending speed of the material is fast at the center and slow at the part that contacts the inner surface, so there are problems in that it is difficult to discharge the material evenly at the lower end opening and it is difficult to perform first-in, first-out smoothly.

"Problems to be Solved by the Invention" The present invention is capable of uniformly and continuously discharging the material in an inverted conical cylindrical hopper by lowering the material in the center and the outer periphery evenly (first in, first out). It is an object of the present invention to provide a simple circle feeder for powder and granular material that can be easily operated and that can save height without changing the tube capacity.

"Means for Solving the Problems" The present invention has a cylinder whose upper fa edge is connected to the outer conical surface of an inverted conical cylindrical hopper, the lower end opening of the cylinder is closed with a bottom plate,
In the connected state, an annular gap is interposed between the lower end opening periphery of the hopper and the bottom plate, an annular gap is formed between the gap and the inner peripheral surface of the cylinder, and a discharge port is provided in the gap. A rotary wheel is provided along the inner peripheral surface of the cylinder via spokes on an upright rotary shaft provided at the center of the bottom plate, and a plurality of small scrapers facing the center are attached to the rotary wheel on the bottom plate. A simple feeder for powder and granular material according to the specified invention, wherein a simple feeder for powder and granular material provided along the line is a specified invention, and an inverted conical cylindrical hopper is an existing hopper.The above-mentioned invention, wherein the hopper and the cylinder are detachable. The simple type feeder for powder and granular material according to each of the above inventions, wherein the connecting flange provided on the upper end edge of the cylinder is connected with a bolt to the flange provided on the outer conical surface. The simplified powder feeder according to each of the above inventions, wherein the lower end opening periphery is formed to be adjustable in elevation by a band-shaped ring. It is constituted by the simple powder feeder described in each of the above inventions, in which the spoke is formed with a guide surface that is slightly oblique to the direction of rotation.

"Operation" Therefore, when granular material is put into the inverted conical cylindrical hopper 1,
The material flows out of the annular gap E into the annular gap 5 with an angle of repose α
form a slope with When the upright pivot shaft 7 is rotated, the material in the central part is guided to the side of the gap by the spokes 8, and the outflow material 16 in the annular gap 5 is swept inside the gap 5 by a plurality of small scrapers 1'O. The material in the hopper 1 is centered because it rotates and is discharged from the discharge port 6 to the outside of the machine, so that the material in contact with the inner conical surface l of the hopper 1 quickly flows out from the gap t into the gap 5. It descends almost evenly at the outer circumference and at the outer circumference.

Also, since the material 16 flowing out within the above-mentioned interval 5 is not loaded with the material in the hopper 1, the small scraper 10 is used to maintain an even density.
The liquid is pushed down continuously from the discharge port 6 and is continuously discharged in a fixed amount. The amount of discharge from the discharge port 6 can be adjusted by increasing and contracting the annular gap t by raising and lowering the lower end opening periphery 4 formed by the strip-shaped ring 14, or by adjusting the rotational speed of the upright rotating shaft 7. It can also be adjusted.

"Example" In the existing inverted conical cylindrical hopper 1 installed in the machine frame,
A flange 11 is attached to the rib 1 on the outer conical surface 1 of the hopper 1.
The flange 12 provided on the upper edge of the cylinder 2 is aligned with the flange 11 via the gasket 18, and both flanges 11 and 12 are tightened and fixed with the port 13 to attach the cylinder 2 to the hopper 1. It is something that connects. This cylinder 2
The lower end opening of the flange 11. is closed by the bottom plate 3, and the flange 11.
The length of the cylinder 2 is set to such an extent that an annular gap is provided between the lower end opening periphery 4 of the hopper 1 and the bottom plate 3 in the connected state of the cylinder 12. As shown in FIG. 1, the annular gap t is such a gap that the powder material in the hopper 1 flows out to the outside and forms a slope with an angle of repose α, and as shown in FIG. 14 is supported by a bolt 19 on a flange 18 provided at the lower end of the hopper 1, and the port 1 is
The gap t can be adjusted by rotating the ring 9 in the forward and reverse directions to raise and lower the band-like ring 14. An annular gap 5 is formed between the gap t and the inner circumferential surface of the cylinder 2, and a discharge port 6 is bored in the gap 5, and an upright hole is provided in the center of the bottom plate 3. Rotating wheel 9 connected to rotating shaft 7 via spokes 8
are provided along the inner circumferential surface of the cylinder 2, and a plurality of small scrapers 10 facing the center of the rotary wheel 9 are provided at equal intervals along the bottom plate 3. The spokes 8 are preferably provided with a material guide surface 15 that is slightly oblique to the rotating direction a. In the figure, 20 is a plate to prevent direct fall to the discharge port 6, and 21 is a reducer for the upright rotating shaft 7. , 22 is a variable speed motor, 23 is a pulley provided on the output shaft of the motor 22, 24 is a pulley provided on the input shaft of the reduction gear 21, and 25 is both pulleys 23.
．． V-belt hung around 24, 26 in Figure 3 is bolt 19
27 is the opening/closing window for rotating operation, and FIG. 5 is a diagram showing a conventional circle feeder provided at the lower end opening of the inverted conical cylindrical hopper 1.

"Effect" Since the present invention is configured as described above, the inverted conical cylindrical hopper 1
A circle feeder can be installed quickly and easily.
It does not take up space in the horizontal and vertical directions at the lower end of the hopper 1, and it can be formed simply, and the granular material in the inverted conical cylindrical hopper 1 can be lowered evenly in the center and the outer periphery. It is hoped that the effect will be that continuous, uniform discharge can be carried out from the discharge port 6.

In addition, the above circle feeder is equipped with the existing inverted conical cylindrical hopper 1.
It can be easily installed and equipment costs can be reduced.

Since it can be attached and detached using the flanges 11, 12 and bolts 13, it is easy to repair and clean the inside, and it can be applied to discharging different types of particulate materials.

The constant continuous discharge amount from the discharge port 6 can be adjusted.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a simple powder feeder of the present invention, Fig. 2 is a plan view taken along the line A-A in Fig. 1, Fig. 3 is a side view of the annular gap 21 node state, and Fig. 4 is an enlarged view of the connection part,
FIG. 5 is a side view of a conventional circle feeder installed. 1. Inverted conical cylindrical hopper, l.. Outer conical surface, 2.. Upper edge, 2.. Cylinder, 3.. Bottom plate, 4.. Lower end opening periphery, t.
... annular gap, 5... annular gap, 6... discharge port, 7...
Upright rotating shaft, 8... spokes, 9... rotating wheels, 10...
Small scraper, 11.12...Flange, 13...Bolt, 14...Strip ring, a...Rotation direction, 15...Guiding surface.

Claims (1)

[Scope of Claims] (1) It has a cylinder whose upper end edge is connected to the outer conical surface of the inverted conical cylindrical hopper, and the lower end opening of the cylinder is closed by a bottom plate, and in the connected state, the lower end of the hopper is opened. An annular gap is interposed between the peripheral edge and the bottom plate, an annular gap is formed between the gap and the inner circumferential surface of the cylinder, a discharge port is formed in the gap, and a central part of the bottom plate is formed. A simple powder granule comprising: a rotary wheel provided along the inner peripheral surface of the cylinder via spokes on an upright rotary shaft provided in the rotary shaft, and a plurality of small scrapers facing the center of the rotary wheel provided along the bottom plate. Body feeder. (2) Claim in which the inverted conical cylindrical hopper is an existing hopper (
1) The simple powder feeder described above. (3) The simple powder feeder according to claim (1) or (2), wherein the hopper and the cylinder are detachable. (4) Claim (1) wherein a connecting flange provided on the upper end edge of the cylinder is connected to the flange provided on the outer conical surface with bolts.
) The simple powder feeder described in (2) or (3). (5) The simple powder feeder according to claim (1), (2), (3) or (4), wherein the annular gap is adjustable. (8) The simple powder feeder according to any one of claims (1) to (5), wherein the lower end opening periphery is formed by a band-like ring so as to be adjustable up and down. (7) A simple powder feeder according to any one of claims (1) to (6), wherein the spokes are provided with guiding surfaces that are slightly oblique to the rotating direction a.