JPH0525532B2 - - Google Patents

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 gone through 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, there was a problem in that the screw conveyor alone could not provide sufficient agitation, making it impossible to achieve uniform quality.

Other methods of mixing multiple types of granules have included placing the granules in a rotating drum and agitating them, but this requires a drum drive device and requires complicated equipment. 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 conical or polygonal dispersion section disposed with its top facing upward, a hopper having an opening facing the top of the dispersion section, and a hopper provided with an opening facing the top of the dispersion section. a distributing part that is provided surrounding the lower part and collects the particles flowing down from the hopper through the dispersion part and guides them downward; The distributing section has an opening through which a part of the particles passes, and the distributing section is arranged in large number in a circumferential direction of the dispersing section so as to guide downward the particles flowing down on the slope of the dispersing section, and each of the distributing sections is arranged in parallel in the circumferential direction of the dispersing section. The passageway is provided with a passageway that is open toward the bottom and a collection surface provided below the passageway, and the passageway has different guiding directions depending on the presence or absence of the passageway bottom surface or the difference in the position of the passageway bottom surface. This is achieved by a granule mixing device characterized in that the surface is provided with an inclined surface that guides the granules discharged from the opening of the dispersion section and the passageway downward toward the discharge opening in the central part. be done.

Embodiments Hereinafter, an example in which the present invention is applied to a milled rice mixing apparatus will be described with reference to the accompanying drawings.

As shown in FIG. 1, the mixing device 10 is arranged to receive polished rice sent from storage tanks 61, 62, 63, 64 via a screw conveyor 70 and an elevating conveyor 80. Each storage tank stores different types of polished rice, and the polished rice is supplied to the screw conveyor 70 from the lower discharge port. The polished rice conveyed by the screw conveyor 70 is raised by a bucket 81 of an elevating conveyor and sent to the mixing device 10. Mixing device 10
The dispersion section 20 has a conical shape and is arranged with its top facing upward, a hopper 30 having a lower opening facing the top of the dispersion section, and a distribution section 40 that is provided so as to surround the bottom of the dispersion section 20. It is equipped with In this example, the hopper 30 receives the polished rice conveyed by the lifting conveyor 80. Although this feeding device is advantageous for automation, any other suitable means can be used to feed the mixture to the hopper of the mixing device, such as a belt conveyor or manual operation.

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. Below the shutter 32, along the slope of the dispersion section, to prevent the washed down polished rice from scattering,
A cover 33 is provided. 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 set the angle of inclination to an excessively high angle so that the particles 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 when the dispersion section is polygonal. 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 discharge port of the hopper 30 and the top facing the same may vary greatly depending on the amount stored in the hopper. On the other hand, it is desirable that the radius of curvature of this top portion be appropriately small to ensure smooth flow down, and in this example, taking these into consideration, the radius of curvature is set to be approximately 5 mm. An opening is formed in the upper part of the slope of the dispersion section 20 to allow a portion of the polished rice flowing down the slope to pass through. In this embodiment, the holes are a large number of small holes 21 whose diameter is slightly larger than that of polished rice. However,
The opening may have various shapes, for example, a hole formed continuously in the circumferential direction of the dispersion section 20, or a relatively large hole provided in the circumferential direction through which a plurality of polished rice can pass through at once. It can be done. Further, as shown in FIG. 4, a shell-shaped guide 22 with an open top can be provided at the lower part of the small hole 21, thereby making it possible to ensure the flow into the small hole 21. As shown in a longitudinal section in FIG. 2, the distributing section 40 is provided with a large number of dividing walls 42 extending vertically on the inner periphery of a cup-shaped outer wall 41, and a conical portion of the distributing section 20 is provided at the upper and lower intermediate portions of the dividing walls. The bottom surfaces of the two are in contact with each other. Therefore, inside the distribution section 40, a large number of passages divided by the dividing walls 42 are lined up in the circumferential direction, and each opening faces the distribution section 20. The distribution section 40 is further provided with an inner bottom surface 43 inside.
The inner bottom surface is connected to the dividing wall 4 below the dispersion section 20.
The opening 44 extends radially inward while descending slightly from the lower end of the opening 44. Inner bottom surface 43
The grooves also extend radially outwardly with a slight rise so as to form the bottom of every other passage in the circumferential direction. 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 the sloped surface thereof serves as a collection surface 47 for collecting flowing white rice and guiding 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. When a predetermined amount of polished rice accumulates in the hopper 30, the shutter 32 is opened in accordance with the operation of the level meter, and the polished rice is transferred to the dispersion section 2.
Flows down on a slope of 0. A portion of it falls through the small hole 21, either directly through the opening 46 or through the collection surface 47 and into the opening 4, as shown by arrow C in FIG.
It is discharged from 6. In this way, the white rice that falls halfway down the slope is discharged earlier than other white rice, and as a result, it is mixed with other white rice. The polished rice that flows down the slope to the end flows down the slope in a thin layer. As mentioned above, this flow is preferably a single layer flow. Due to this layering, the white rice of the same variety that has been clumped in the hopper is dispersed along the circumferential direction of the dispersion section. The white rice that has flowed down the slope to the end continues to flow through the passage 45a.
Or it flows into the passage 45b. As shown by arrow A, the polished rice flowing into the passage 45a first passes through the inner bottom wall 43.
It flows radially inwardly and falls out of the aperture 44, either directly below the aperture 46 or over the collection surface 47 and into the aperture 46. On the other hand, as shown by arrow B, the white rice that has flowed into the passage 45b is
It passes downwardly through the passageway and slides down over the collection surface 47 to the opening 46 . In this way, the polished rice flowing down the slope of the dispersing section 20 to the end is dispersed in the circumferential direction of the conical shape in the dispersing section 20, and is then distributed in the distributing section 40.
In this way, the particles are distributed in the radial direction of the cup shape and are dispersed in directions that intersect with each other. Therefore, the mixing device 10
The polished rice passing through is sufficiently mixed due to the difference in the timing at which it starts falling 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 affected by the difference in collection time or multi-stage collection due to the difference in the speed of flow between once passing through the gently sloped inner bottom wall 43 and when directly reaching the collection surface 47. seems to be doing so.

In the above embodiment, two passages such as the passages 45a and 45b are considered as one unit, but three or more passages are considered as one unit, and the guiding directions of the passages within one unit are mutually different in the radial direction. , the units may be arranged repeatedly, or the guiding direction of the passage may be varied in the radial direction without forming a specific unit. When three pieces are used as one unit, two inner bottom walls 43a and 43b are provided, and there are three stages including the collection wall 47, as shown schematically in FIG. 3 of the distribution section 40'. The flowing down polished rice is a stream D that falls from the middle of the dispersion section 20, and a flow D that falls from the middle of the dispersion section 20.
After flowing down, a total of four types of flows, A, B, and C, pass through the passage partitioned by the dividing wall 42, resulting in better mixing.

Although the above description 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 grains of 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 from the middle of 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, the particles flowing down the slope are dispersed in a thin layer as they slide down the slope, and when they pass through the passage in the distribution section, they are distributed in different directions and dispersed. Since it is collected by the collecting surface, mixing will also take place here. Therefore, due to both of these mixing 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, 40'...
Sorting part, 42...Dividing wall, 43, 43a, 43
b...Inner bottom wall, 44...Opening, 45a, 45b...
...Passway, 46...Opening, 47...Collection surface.

Claims (1)

[Claims] 1. A conical or polygonal cone-shaped dispersion section arranged with the top thereof facing upward, a hopper having 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 dispersion section a distributing part that collects the particles flowing down through the dispersion part and guides them downward; the dispersion part has an opening in the middle of the slope thereof, through which a part of the particles flowing down the slope passes; The distribution section includes a plurality of passages arranged in parallel in the circumferential direction of the distribution section so as to guide the particles flowing down on the inclined surface of the distribution section downward, each of which is open toward the distribution section;
a collection surface provided below the passage, the passage has a guiding direction that differs depending on the presence or absence of the passage bottom or a difference in the position of the passage bottom, and the collection surface and a granule mixing device, further comprising an inclined surface that guides the granules discharged from the passage downward toward a discharge opening in the center.