JPH06166437A - Feeding/discharging device for powder and granular material - Google Patents

Abstract

PURPOSE:To provide a device for stably feeding and discharging powder and granular materials continuously without cross-linking them but dispersing them, in a simple structure. CONSTITUTION:A discharging port 2 is provided in the center of the bottom part of a container 1, and a rotation member 3 having larger outer diameter than the aperture diameter of the discharging port, is provided above the discharging port in a feeding/discharging device of powder and granular materials. A static fin member 5 running along the upper surface of the rotation member 3 is arranged, and an outer peripheral scraper member 4 is fixed to the lower surface peripheral part of the rotation member 3, while one or more small diameter annular scraper member 14, which is in close proximity to the lower part of the rotation member 3, and is in a concentric state toward the outer peripheral scraper member 4, is rotatively shaft-supported independently. The rotation speed of the outer peripheral scraper member 4 and of each annular scraper member 14 is made to be larger in the inner circumferential side than the outer peripheral side, and a switching member 6 and a dispersing member 7 are arranged in the vicinity of the discharging port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying and discharging powdery or granular material having a discharge port at the bottom of a container and having a rotating member for covering the discharge port.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 63-1636 discloses a powder and granule supply and discharge device having a rotary scraper and a discharge port at the bottom of a container and a fixed cover for covering the discharge port.

[0003]

Problems to be Solved by the Invention JP-A-63-I636
In the powder and granular material supply device disclosed in Japanese Patent Publication, since the cone at the center of the container is stationary depending on the type of powder or granular material, crosslinking easily occurs, and the powder weight directly affects the powder or granular material drop port. Therefore, there are problems that the supply amount is affected by the height of the storage tank, the discharged aggregates of the granular material cannot be loosened, and the granular material is dropped and discharged due to vibrations and the like even while stopped. In order to solve such a problem of the conventional device, the present inventor has previously proposed the powder / granule supply / discharge device of Japanese Patent Application No. 3-337510. In the powdery-particle feeding / discharging device disclosed in Japanese Patent Application No. 3-337510, the powdery particles at the lower part of the rotating member flow toward the central outlet while being scraped by the scraper member from around the rotating member. Although the bottom of the container is tilted and the angle and number of scraper members are changed, the moving speed slows as the scraper member is integrated and approaches the discharge port from the surroundings, and the type of powder or granules, especially ultrafine powder, adheres. For powder having strong properties, there was a problem in quantitativeness because the powder was filled in the vicinity of the discharge port and the powder particles were accumulated, and the scraper member itself obstructed the passage. An object of the present invention is to provide a powdery-particle supply / discharge device that solves such problems.

[0004]

In the powder and granular material supply / discharge device of the present invention, a rotating member having an outer diameter larger than the diameter of the discharge port is provided at a position near the center of the bottom of the container and above the discharge port.
A stationary fin member is arranged along the upper surface of the rotating member, and an outer peripheral scraper member is fixed to the peripheral portion of the lower surface of the rotating member. An annular ring having a small diameter and being concentric with the outer peripheral scraper member adjacent to the lower side of the rotating member. One or two or more independent scraper members are independently rotatably supported so that the rotation speed of the outer peripheral scraper member and the rotation speed of each annular scraper member are greater on the inner peripheral side than on the outer peripheral side, In addition, a dispersion member rotatably supported and an opening / closing member for opening / closing the discharge port are arranged near the discharge port.
The rotating member here may include a disk shape, a cone shape, a hemispherical shape, a truncated spherical shape, a screw thread shape, and a combination thereof. Further, the fin member referred to here may include a plate shape, a brush shape, a comb shape, a chain shape, a wire shape, a ribbon shape, and a combination thereof. In addition, the outer peripheral scraper member and the annular scraper member here are not only plate-shaped,
It may include a brush shape, a comb shape, a chain shape, a wire shape, a ribbon shape, and a combination thereof. Further, the dispersion member referred to herein may include not only a disc shape, but also a propeller shape, a brush shape, a chain shape, a wire shape, and a combination thereof.

[0005]

[Operation] In the device of the present invention, since the weight of the powder or granular material in the container is generally supported by the rotating member and the inner wall of the container,
Below the rotating member, the load of the storage tank granules is released.
The rotating member is separately supported by a rotating shaft, etc., and the direction of the force for supporting the granular material changes midway in the region between the fixed inner wall and the rotating rotating member. Since the changing region is specified between the rotating member and the fin member, the granular material is subjected to a constant interaction force between the granular materials or between the granular material and the rotating member in this region while surrounding the rotating member. Along the way, it falls little by little according to the amount discharged. At this time, not the flow of the powdery particles from one place on the rotating member but the flow from the entire surface of the rotating member to the periphery occurs. By providing a screw screw groove or small protrusions on the surface of the rotating member, it is possible to disintegrate a lump of powder or granular material. Since the rotation of the granular material in the storage tank above the rotating member from the rotating member is suppressed by the stationary fin member, since the force is not exerted on the entire granular material, bridging due to excessive compaction etc. is less likely to occur and almost all of the amount is reached. It can be discharged to a near degree.

[0006] The granular material that has moved under the rotating member is released from the load of the granular material in the storage tank in the container, and is scraped from the peripheral portion to the central portion by the scraper member, and the apparent density becomes even more constant. . Under the rotating member, the scraper member is such that the outer peripheral scraper member fixed to the rotating member and each of the other annular scraper members are separately supported.First, the outer peripheral scraper member scrapes the outer scraper inward, and then the annular scraper member. Is pushed further inside. At this time, the scraper member on the inner peripheral side rotates at a higher speed than the scraper member on the outer peripheral side, so that the granular material on the outer peripheral portion does not stay in the middle. Then, a part of the outer peripheral scraper member or the annular scraper member is provided with a lacking portion, or a step or groove is provided on the bottom of the container to form a granular material layer having a constant bulk volume, and then a constant volume is supplied by the annular scraper member. It can also be discharged. Furthermore, the dispersal member can forcibly loosen the lumps, allowing continuous supply and discharge without interruption. Further, the outlet can be opened and closed instantaneously from the outside by the opening and closing member.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a powder and granular material supply and discharge device according to an embodiment of the present invention. 1 is a longitudinal sectional view of a main part of the apparatus, FIG. 2 is a lateral sectional view taken along line II-II of FIG. 1, and FIG. 3 is III of FIG.
-III is a cross-sectional view taken along the line, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. A discharge port 2 is provided near the center of the bottom of the container 1, and a rotating member 3 having an outer diameter larger than the diameter of the discharge port 2 is provided above the discharge port 2. The upper surface of the rotating member 3 has a cone shape, and the fin member 5 is arranged along the cone. The fin member 5 is rotatably supported on the rotating shaft of the rotating member 3 by, for example, a resin bearing 11, and is engaged with a stopper 12 provided on the inner peripheral wall of the container 1 so as not to rotate together with the rotating member 3. Even if the rotating member 3 rotates, only the fin member 5 can be stopped. Further, an opening / closing member 6 that opens and closes the discharge port 2 by vertically moving to the lower side of the rotating member 3 and a rotatable dispersion member 7 that directly acts on the granular material to disperse the granular material are provided. Besides the above, the fin member 5 can be directly fixed to the container.

Next, the rotation of the outer peripheral scraper member 4, the annular scraper member 14 and the dispersion member 7 will be described.
Each of the rotating shafts can be rotatably supported separately, but an example using two concentrically arranged shafts will be described here. For example, a square shaft 8 having a square cross section and a pipe shaft 10 arranged concentrically with the square shaft 8 and having an end portion directly connected to the rotating member 3 are independently rotatably supported. A planetary gear mechanism is arranged in a cavity formed in the center of the lower surface of the rotating member 3. The planetary gear mechanism includes an inner toothed gear 17 on the inner surface of the hollow portion of the rotating member 3, a planetary gear 16 inscribed in the inner toothed gear 17, and a sun gear 15 arranged at the center of the inner toothed gear 17. A square hole is formed in the center of the sun gear 15 so that it can be slid in the axial direction while being fitted to the square shaft 8 and transmitting the rotational force. The annular member 13 that holds the planetary gears 16 is the lower frame 3 of the turntable.
It is supported by a and is rotatable while being sealed from the granular material. The outer peripheral scraper member 4 is fixed to the turntable lower frame 3a, the annular scraper member 14 is fixed to the annular member 13, and the dispersion member 7 is attached to the square shaft 8. The gear ratio is such that the rotation speed of the annular scraper member 14 is equal to that of the square shaft 8.
The rotation speed is set to be slower and higher than that of the outer peripheral scraper member 4. The number, the angle, and the rotating direction of each of the outer peripheral scraper member 4 and the annular scraper member 14 are optimal for scraping the powder or granular material from the outer periphery to the central portion. Further, the opening / closing member 6 may directly open / close the discharge port 2. Furthermore, the rotating member 3 does not necessarily have to be circular. Further, the shape of the dispersion member 7 may be any suitable shape as long as it has an action of loosening the lumps of the powder and granules. Discs and vanes for individual powders,
And a brush or the like can be added. 5 and 6
Shows an example of the dispersion member.

FIG. 7 is a vertical cross-sectional view of a powder and granular material supply and discharge device of another embodiment of the present invention, and FIG. 8 is a partially enlarged cross-sectional view of the embodiment of FIG. In the embodiment of FIG. 7, a concentric step 1b is provided at the bottom of the container 1, and the step 1b is packed with the outer peripheral scraper member 4 along the bottom and scraped to make the bulk volume constant and then an annular shape along the bottom. Scraper member 1
In step 4, a predetermined volume is scraped out and dispersed and discharged by the dispersion member 7. If there is no transfer delay, the annular volume of the area surrounded by the step 1b and the dashed line 22 formed by the angle of repose of the granular material in FIG.
It is supplied and discharged by one rotation of 4. Furthermore, FIGS. 9 and 10 are illustrated as another embodiment of the step portion. Although detailed description is omitted, in the example of FIG. 9, the annular member 13 is extended to the vicinity of the bottom of the container 1 to provide a powder flow path 23, and is indicated by a chain line 22 surrounded by the step 1b and the annular member 13. Figure 1
In the example of 0, an alternate long and short dash line 2 enclosed by a step 1b and an annular weir 21 attached to the bottom of the container 1 and provided with powder flow passages at various places
It is possible to supply and discharge while forming a constant volume shown by two grooves. Further, the rotary shaft of the rotary member or the like may be driven not only from above but also from below or from the side surface of the container by an appropriate supporting mechanism, and a flexible shaft may be adopted. Further, regarding the scraper member on the lower surface of the rotating member, the outer peripheral scraper member, the annular scraper member and the two-stage type are exemplified above.
A three-stage type or more is also possible. It should be noted that although the reference numerals used in the drawings are also described in the claims, these reference numerals are for reference only and do not limit the present invention.

[0010]

INDUSTRIAL APPLICABILITY The supply and discharge device for powder and granules of the present invention can be applied to many kinds of powder and granules such as ultrafine powder and highly adherent powder as well as general powder, without causing crosslinking. The powder and granules can be supplied and discharged to the end. Further, a lump of powder or granules can be crushed and supplied and discharged. Further, the volume of the discharged powder or granules can be kept constant, and the quantitative property is good. Furthermore, it is possible to disperse by the dispersion member and to continuously supply the material without interruption.
Particularly, a dispersed powder can be formed without using a medium such as air. Moreover, since the discharge port can be completely sealed by the opening / closing member, it is easy to carry and connect with other devices. Further, it has many advantages such as a simple structure and easy disassembly and cleaning.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a powder / granule supply / discharge device according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

3 is a cross-sectional view taken along the line III-III in FIG.

4 is a cross-sectional view taken along the line IV-IV in FIG.

5 is a vertical cross-sectional view of a modified example of the discharge port portion of the powder / granule supply / discharge device of FIG. 1;

6 is a vertical cross-sectional view of another modified example of the discharge port of the powder / particle supply / discharge device of FIG. 1;

FIG. 7 is a vertical cross-sectional view of a main part of a powder / granule supply / discharge device according to another embodiment of the present invention;

8 is a partially enlarged cross-sectional view of a stepped portion of the powder / granule supply / discharge device of FIG.

9 is a partially enlarged cross-sectional view of a modification of the step portion of the powder / granule supply / discharge device of FIG. 7,

FIG. 10 is a partially enlarged cross-sectional view of another modification of the stepped portion of the powder / granule supply / discharge device of FIG. 7.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container 1b ... Step 2 ... Discharge port 3 ... Rotating member 4 ... Outer peripheral scraper member 5 ... Fin member 6 ... Opening / closing member 7 ... Dispersing member 8 ... Square shaft 14 ... Annular scraper member

Claims (3)

[Claims] 1. A rotating member (3) having an outlet (2) near the center of the bottom of the container (1) and having an outer diameter larger than the diameter of the outlet (2) above the outlet (2). In a powder and granular material supply and discharge device, the rotating member (3)
A stationary fin member (5) is provided along the upper surface of the outer peripheral scraper member (4) around the lower surface of the rotating member (3).
And one or more annular scraper members (14) concentric with the outer peripheral scraper member (4) and adjacent to the outer peripheral scraper member (4) and having a small diameter. And peripheral scraper member (4)
Rotation speed and respective annular scraper members (14)
The supply and discharge device for powder and granular material characterized in that the rotation speed of the inner peripheral side is higher than that of the outer peripheral side. 2. The powder / granule supply / discharge device according to claim 1, wherein the dispersion member (7) rotatably supported around the discharge port (2) and the discharge port (2) are opened and closed. A powder / granule supply / discharge device comprising an opening / closing member (6). 3. The powder / granule supply / discharge device according to claim 1 or 2, wherein one or more steps (1b) or grooves are concentrically formed in the bottom of the container (1). At least one step (1b) or groove, which is scraped off and scraped off by an annular scraper member (14) along the bottom to make the bulk volume of the supply constant, and a powdery-particle supply / discharge device. .