JPH02194824A - Mixer of granules - Google Patents

Abstract

PURPOSE:To mix granules efficiently by a mixer having a simple structure by composing the mixer with a dispersing part having a conical (polygonally pyramidal) shape with an apex being upside and openings in the declining surface, a hopper opened to the apex of the dispersing part, and a sifting part having specific passing route and collecting surface. CONSTITUTION:In the case of mixing different kinds of polished rices, the different kinds of the polished rices contained in storage tanks 61-64 are sent to a mixer 10, flow downward on a declining surface of a dispersing part 20, and a part of them drops through a small hole 21 faster than the other rice (shown by arrow C) and is discharged from an opening 46. Meanwhile, the rices, which slide on the declining surface to the end, flow while forming a thin layer, are either guided by the internal bottom wall 43 (shown by arrow A) from the passing route 45a to the opening 46 or led to slide downward on a collecting plane 47 (shown by arrow B) from the passing route 45a to the open part 46. That is, polished rices which passed through the mixer 10 are mixed each other well by the difference of the starting time of dropping in the dispersing part 20 and dispersion in the directions crossing each other while passing in the shifting part 40.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a mixing device for grains such as rice.

Conventional techniques and their problems For example, white rice shipped from a rice mill is sometimes a blend of multiple varieties.

In this case, the polished rice that has undergone the rice milling process is stored in tanks for each type, and is appropriately discharged to a screw conveyor that sequentially moves below these tanks, and is stirred and mixed by the screw conveyor. However, this screw conveyor alone cannot provide sufficient agitation;
There was a problem that it was not possible to achieve uniform quality.

In addition, a method of mixing multiple types of granules has been adopted, such as storing the granules in a rotating drum and stirring them, but this requires a drum drive device, etc., and the equipment is complicated. There was a problem of increasing size and size.

An object of the present invention is to solve these problems and provide a granule mixing device that is small and has a simple structure and can perform sufficient mixing.

Means for Solving the Problems The object of the present invention is to provide a dispersing section having a conical or polygonal pyramid shape arranged with its top facing upward, a hopper having an opening facing the top of the dispersing section, and a dispersing section. a distributing section that is provided to surround a lower part of the hopper and collect particles flowing down from the hopper through the dispersion section and guide them downward; The distribution section has an opening through which part of the particles are passed through, and the distribution section has a passage that guides the particles that have flowed down on the slope of the dispersion section downward, and a collection surface provided below the passage. A plurality of the passages are arranged in parallel in the circumferential direction of the dispersion section with guiding directions in at least two different directions so as to distribute the particles in the radial direction of the dispersion section, and the collection surface includes: This is achieved by a granule mixing device characterized in that it comprises an opening of the dispersion section and a collection surface that collects and guides the granules discharged from the passageway downward.

EXAMPLE Hereinafter, a case where the present invention is applied to a mixed machine for polished rice will be explained based on the accompanying drawings.

As shown in Fig. 1, the mixing device (10) includes storage tanks (61), (62), (63), (64).
From screw conveyor (70), lifting conveyor (80
) is arranged to receive the white rice sent through the station.

Each storage tank stores different types of white rice.
Polished rice is supplied to the screw conveyor (70) from the lower discharge port. The polished rice conveyed by the screw conveyor (70) is lifted up by the packet (81) of the elevating conveyor and sent to the mixing device (10). Mixing device (1
0) is a conical dispersion section (
20), a hopper (30) having a lower opening facing the top of the dispersing section, and a sorting section (40) provided so as to surround the lower part of the dispersing section (20). In this example, the hopper (30) receives polished rice conveyed by the lifting conveyor (80).

This feeding device is advantageous for automation, but
In addition, any suitable means such as a belt conveyor or manual operation may be used for supplying the mixture to the hopper of the mixing device.

The hopper (30) is equipped with a level meter (31) on the side wall, and a shutter (32) interlocked with the level meter is attached to the lower end. As a result, when a predetermined amount of rice is accumulated in the hopper, the shutter (32) is opened and the polished rice flows down. A cover (33) is provided below the shutter (32) along the slope of the dispersion section so that the polished rice that flows down is not scattered. The polished rice flowing down from the shutter (32) flows along the dispersion section (20). The slope of the conical surface of the dispersion section (shown by the dashed line in Figure 2) is determined depending on the type of particles to which it is applied, but in order to achieve smooth flow, it must be larger than the angle of repose of the particles. It is preferable to use an inclination angle, and it is preferable not to make the inclination angle too large so that the grains flow in one layer.

In this example, it is approximately 45° (the angle of repose of white rice: approximately 30°). This selection of the inclination angle also applies to the case where the dispersion section has a polygonal pyramid shape. Further, it is desirable that the top of the dispersion section (20) be appropriately rounded. This is because if the top is sharp, the flow resistance between the outlet of the hopper (30) and the top facing it will be thick (and may change) depending on the capacity inside the hopper. It is desirable that the radius of curvature of this top part is appropriately small to make the flow smooth, and in this example, taking these into consideration, the radius of curvature is rounded to 5 mm. )
An opening is formed in the upper part of the sloping surface to allow a portion of the polished rice flowing down the sloping surface to pass through. In this embodiment, the chain holes are a number of small holes (21) whose diameter is slightly larger than that of polished rice. However, the opening can have various forms, for example, a gap formed continuously in the circumferential direction of the dispersion section (20), or a gap formed in the circumferential direction and allowing a plurality of polished rice to pass through at once. It can be made with a large hole.

Furthermore, as shown in Fig. 4, a shell-shaped guide (22) with an open top can be provided at the bottom of the small hole (21), thereby making the flow into the small hole (21) more reliable. be able to. As shown in the vertical cross section in FIG. 2, the distribution part (40) is provided with a large number of vertically extending dividing walls (42) on the inner circumference of a cup-shaped outer wall (41), and the upper and lower intermediate parts of the dividing walls are The bottom surface of the cone of the dispersion section (20) is in contact with the dispersion section (20). Therefore, inside the distribution part (40), a large number of passages divided by the dividing wall (42) are lined up in the circumferential direction, and each opening faces the distribution part (20). Inside the distribution part (40), there is further an inner bottom surface (4
3) is provided. The inner bottom surface extends radially inward while slightly descending from the lower end of the dividing wall (42) located below the dispersion portion (20), and forms an opening (44) in the center. The inner bottom surface (43) also extends radially outwardly with a slight rise to form the bottom of every other circumferentially aligned passageway.

Therefore, passages (45a) having the bottom and passages (45b) having an open bottom without the bottom are arranged alternately. The lower part of the outer wall (41) extends radially inward while descending to form an opening (46) in the center, and its sloped surface forms a collection surface (47) that collects the flowing polished rice and guides it downward.
).

A screw conveyor (90) faces the opening (46) of the sorting section (40). The conveyor conveys the received polished rice while further stirring and mixing it with a screw, and sends it to the next process from the discharge port (91).

This mixing device works as follows. Hopper (30)
When a predetermined amount of polished rice has accumulated, the shutter (32) is opened in response to the operation of the level meter, and the polished rice flows down on the slope of the dispersion section (20). A portion thereof falls through the small hole (21) and is discharged either directly through the opening (46) or via the collection surface (47) through the opening (46), as shown by arrow C in FIG.

In this way, the white rice that falls from the middle of the slope is discharged faster than other white rice, and as a result, it mixes with other white rice. It flows in a thin layer on the surface.As mentioned above, this flow is preferably a single layer flow.By this layering, the white rice of the same variety that has become lumps in the hopper is spread in the circumferential direction of the dispersion section. The white rice that has flown down the slope to the end is further distributed along the passage (45a) or the passage (45b).
). As shown by arrow A, the polished rice that has flowed into the passageway (45a) is first guided by the inner bottom wall (43), flows radially inward, falls from the opening (44), and directly falls into the opening below. (46).

or over the collection surface (47) to the opening (46).

On the other hand, the polished rice that has flowed into the passageway (45b) passes downwardly through the passageway, as shown by arrow B, and slides down on the collection surface (47) to reach the opening (46). In this way, the polished rice flowing down the slope of the dispersion section (20) to the end is dispersed in the circumferential direction of the conical shape in the dispersion section (20), and is then distributed in the distribution section (4).
At 0), the particles are distributed in the radial direction of the cup shape and are dispersed, and thus the particles are dispersed in directions that intersect with each other. Therefore, the polished rice passing through the mixing device (10) is sufficiently mixed due to the difference in the falling start timing in these dispersion sections and the dispersion in mutually intersecting directions through the distribution section. In addition, the mixing effect when passing through the distribution section (40) is due to the difference in the flow rate between when passing through the gently sloped inner bottom wall (43) and when directly reaching the collection surface (47). It is thought that the time difference or multi-stage structure also contributes.

In the above embodiment, two passages such as the passages (45a) and (45b) are regarded as one unit, but three or more passages are regarded as one unit, and the guiding directions of the passages within one unit are set to be radial from each other. The units may be arranged repeatedly in different directions, or the guiding directions of the passages may be different in the radial direction without forming specific units. When three pieces are used as one unit, two inner bottom walls (43a) and (43b) are provided, including the collecting wall (47), as shown schematically in FIG. 3 of the sorting part (40-). It has a three-stage configuration.

The flowing polished rice is divided into a flow (D) that falls from the middle of the dispersion section (20), and a flow (A) and (B) that flows down the dispersion section (20) and then passes through a passage partitioned by a dividing wall (42). ),
There are a total of four types of flows (C), and better mixing is achieved.

Although the above explanation has been made using polished rice as an example, it goes without saying that the apparatus of the present invention can be similarly applied to mixing various grains, beans, and other grains.

Effects of the Invention As is clear from the above, according to the present invention, it is possible to provide a granule mixing device that exhibits the following effects. In other words, the particles that flow down from the hopper to the top of the conical or polygonal pyramid-shaped dispersion section are divided into those that first fall halfway down the slope of the dispersion section and those that flow all the way down the slope. Due to this difference, the timing of reaching the collection surface or lower opening is delayed, resulting in mixing at the time of discharge. In addition, when the particles flow down the slope, they form a thin layer and are dispersed in the circumferential direction of the cone, and when they pass through the passage in the distribution section, they are distributed in the radial direction. Mixing occurs here as well, as the particles are dispersed in the opposite directions and collected by the collection surface after dispersion in the intersecting directions.

Therefore, due to these warming effects as the particles flow down, sufficient mixing is achieved. Moreover, the structure for this is simple and does not require a driving source or moving members.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is a front view showing the mixing device together with its supply/discharge device, FIG. 2 is a perspective view showing the distribution section of the mixing device in a longitudinal section, and FIG. FIG. 4 is a vertical cross-sectional end view schematically showing another example of the mixing device, and FIG. 4 is a partially cutaway perspective view showing another example of the dispersion section. (10)...Mixing device (20)...Dispersion section (21)...Small hole (opening) (30)...Hopper (40), (4CI)...Distribution section (42)
...Dividing walls (43), (43a), (43b) - Inner bottom wall (44) ... Openings (45a), (45b) - Passage (46)...
... Opening (47) ... Collection surface (above) Fig. Fig. 3゜Hopper Opening 40, 40' Handling section 45a, 45b - Passage 9. The best person...Kan O

Claims (1)

[Claims] (1) A conical or polygonal pyramid-shaped dispersion section arranged with the top up, a hopper equipped with an opening facing the top of the dispersion section, and a hopper provided so as to surround the lower part of the dispersion section from which the hopper is disposed. and a distribution section that collects the particles flowing down through the dispersion section and guides them downward, and the dispersion section has an opening in the middle of the slope thereof, through which a part of the particles flowing down the slope passes. , the sorting section includes a passage that guides the particles flowing down on the inclined surface of the dispersion section downward, and a collection surface provided below the passage, and the passage allows the particles to be distributed in the dispersion section. A plurality of collecting surfaces are arranged in parallel in the circumferential direction of the dispersion section with guiding directions in at least two different directions so as to be distributed in the radial direction of the dispersion section, and the collecting surface is discharged from the opening of the dispersion section and the passage. A granule mixing device characterized by comprising a collection surface that collects granules and guides them downward.