JPH061451A - Supply and discharge device for granular powder - Google Patents

Abstract

PURPOSE:To provide an apparatus for supplying and discharging a fixed quantity of granular powder continuously stably without bridging, while being dispersed in a simple structure. CONSTITUTION:A granular powder supply and discharge apparatus comprises a discharge port provided in the center of the bottom of a receptacle and a rotating member 3 which is disposed above the discharge port and has an outside diameter larger than the bore diameter of the discharge port, wherein a stationary fin member 5 is disposed along the upper surface of the rotating member, a scraper member 4 is fixed to the lower surface of the rotating member or the side thereof, and the scraper member is changed in the angle or the position according to the degree of resistance received from the granular powder, whereby the controlled pressing force is applied to the granular powder to keep the apparent density of the granular powder constant. The stepped parts of the bottom of the receptacle or the grooves are filled with granular powder to keep the bulk capacity constant, and an opening and closing member 6 and a dispersing member 7 are disposed near the discharge 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-63-1636
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 previously submitted the powder and granular material supply and discharge device of Japanese Patent Application No. 3-337510, and further improved and submitted April 23, 1992. Proposed a "Supply and Discharge Device for Powders and Granules". The latter was intended to solve various problems due to a decrease in the discharge speed in the vicinity of the discharge port in the powder and granular material supply and discharge device disclosed in Japanese Patent Application No. 3-337510. However, none of them have a function of measuring the actual supply weight of a balance or the like, and rather, the measurement is based on the volume standard, so in order to maintain the quantitative supply accuracy, the apparent density of the powder in the measuring unit is controlled and managed. There were challenges. It is an object of the present invention to provide a powder and granular material supply and discharge device in which such a problem is solved by a simple mechanism.

[0004]

In the powder and granular material supply and discharge device of the present invention, a rotating member having an outer diameter larger than the diameter of the discharge port is provided above the discharge port near the center of the bottom of the container.
A stationary fin member is arranged along the upper surface of the rotating member, and the pressing force is applied to the lower surface or the side surface of the rotating member by changing the angle or position depending on the magnitude of the drag force received from the granular material. A scraper member configured to control the pressure so as to have a constant apparent density is fixed, and a rotatably supported dispersion member and an opening / closing member for opening and closing the discharge port are arranged near the discharge port. Preferably, one or more steps or grooves are formed concentrically on the bottom of the container, and at least one or more steps or grooves are ground and scraped by a scraping member along the bottom. In the present invention, the shape of the rotating member may be a disk shape, a cone shape, a hemispherical shape, a truncated spherical shape, a screw thread shape, or a composite shape thereof. Further, the fin member has a plate shape,
It may have a brush shape, a comb shape, a chain shape, a wire shape, a ribbon shape, a wire mesh shape, a punch plate shape, or a composite shape thereof. The shapes of the scraper member and the scraping member are plate-like, brush-like, comb-like, chain-like,
It can be wire-shaped, ribbon-shaped, or a composite shape thereof. The shape of the dispersion member is disk-shaped, propeller-shaped,
It may have a brush shape, a chain shape, a wire shape, or a composite shape thereof. The shape of the opening / closing member may be disc-shaped, cup-shaped, cone-shaped, and may include a sluice valve, a butterfly valve, a shutter valve, and the like.

[0005]

[Operation] In the device of the present invention, since the weight of the granular material in the container is generally supported by the rotating member and the inner wall of the container,
Below the rotating member, the particles are released from the load of the storage tank particles. 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 powder or granular material is subjected to the interaction force between the powder or granular material or between the powder or granular material and the rotating member in this area, so that Along the way, it falls little by little according to the amount discharged. At this time, not the flow of the powder or granules from one location on the rotating member, but the flow of the powder or granular material from the entire surface of the rotating member to the periphery occurs. Rotation of the granular material in the storage tank above the rotating member from the rotating member is suppressed by the stationary fin member, and the entire granular material is not rotated. It can be discharged to a near degree.

[0006] The powder particles falling around the rotating member at the bottom of the container are scraped by the scraper member from the peripheral part to the central part, and the powder particles moving under the rotating member are removed from the load of the storage tank particles in the container. It will be released. At this time, the scraper member has some functions, and each of them functions individually or in combination. That is, the action of scraping the granular material from the outer peripheral portion to the lower part of the rotating member, the action of changing the angle or position of the scraper member to reduce the force of scraping when the lower part of the rotating member is filled with the granular material, When the granular material below the rotating member is vacant or the apparent density is low, the scraper member's angle or position is changed to increase the scraping force. It has the effect of scraping away the scraper, and when the container approaches the sky, the angle or position of the scraper member can be returned and the scraper can be scraped over as large an area as possible. In some cases, one type of scraper member also has some functions, and in other cases, individual scraper members share the respective functions. 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. Furthermore, the drive shafts of the rotating member and the dispersing member may be driven not only from above but from below or from the side surface of the container by a suitable supporting mechanism,
Flexible shafts are also possible.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 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.
It is a cross-sectional view taken along the line -IIIa-IIIb-IIIb-IIIa-III. 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.

The inner surface of the bottom of the container 1 has a spherical shape, and a step 1b is formed in a concentric shape so as to follow the spherical surface of the bottom surface of the rotary member 3 via the spring member 4a and scraper shaft 4b. A scraper member 4 is fixed which is rotatable and whose rotation angle is changed according to the drag force received from the granular material. Further, when a sufficient effect can be expected only by the restoring force of the scraper member 4 due to its own weight, the spring member 4
The scraper member 4 can be freely rotated except for a, or the spring member 4a can be used as an auxiliary mechanism. Further, a partition member 13 is fixed to the rotating member 3, and a scraping member 14 for scraping powder particles along the step 1b is fixed to the partition member 13. Here, the operation of the scraper member 4 will be briefly described. As shown in the single scraper member 4 in FIG. 3, when there is no granular material, it is at a position of 4 °, and when there is a granular material, the drag force of the granular material is received and the position of 4 ′ is moved. After a lapse of time, when a further large drag force is applied, the pressing force attracted to the 4 ″ position is reduced.
At the same time, the resistance of the scraper member to the particles is also reduced. When it becomes empty, it returns to the 4 ° position and scrapes over a wide area. 4, 5, and 6 show modified examples of the discharge port 2 and the dispersion member 7. In FIG. 6, a screen 16 is fixedly attached to the discharge port 2, and a dispersion member 7 having a brush 7 a adapted to rotate along the screen 16 is accommodated.

FIG. 7 is a partial sectional view of a powder and granular material supply and discharge device according to another embodiment of the present invention, and FIG. 8 is a partial cutaway of a powder and granular material supply and discharge device according to another embodiment of the present invention. FIG. In the example of FIG. 7, the scraper member 4 is supported via two spring members 4a on the vertical axis, and the spring of each spring member 4a is adjusted so that the scraper member 4 can operate most effectively depending on how the drag force is applied. The position of the scraper member can be moved by changing the constant and the rotation angle. Specifically, a safety mechanism is normally provided in which the first-stage spring member operates, and the second-stage spring member operates when an extreme load is applied. Further, in the example of FIG. 8, the scraper member 4 is supported via the spring member 4a on the horizontal axis. The direction of the scraper member 4 should be optimal for scraping. The angle of the scraper member 4 changes depending on the degree of the drag force, and a pressing force can be applied to the powder or granular material so that the apparent density becomes constant. Further, in this figure, the protrusion member 3a can be fixed around the rotary member 3 to control the discharge of the powder or granular material. Next, the bulk volume due to the step 1b or the groove will be described. Assuming that there is no transfer delay, an annular volume within the area surrounded by the dashed line 22 formed by the step 1b and the repose angle of the granular material in FIG. 9 is supplied and discharged by one rotation of the scraping member 14. . Furthermore, FIG. 10 and FIG. 11 are illustrated as another embodiment of the step portion. In the example of FIG. 10, the partition member 13 is extended to the vicinity of the bottom of the container 1 and the powder flow path 23 is provided so that a constant volume indicated by a chain line 22 surrounded by the step 1b and the partition member 13 can be discharged. In the example of FIG. 11, it is possible to discharge a constant volume indicated by a dash-dotted line groove 22 surrounded by an annular weir 21 attached to the bottom of the container 1 and provided with powder flow passages at various places and the step 1b.

[0010]

INDUSTRIAL APPLICABILITY The powdery-particle feeding / discharging device of the present invention can be applied to many powders as well as fine powders, and can supply and discharge the powdery granules to the end with good quantitativeness without causing cross-linking. In particular, even if there is no weight measuring section such as a balance, the apparent density and the volume of the discharged granular material can be kept constant, and therefore 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 sealed by the opening / closing member, it is easy to carry and connect with other devices.
Further, it has 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 in FIG.

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

FIG. 4 is a vertical cross-sectional view of a modified example of the discharge port portion of the powder / grain supply / discharge device of FIG.

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

FIG. 6 is a vertical cross-sectional view of another modified example of the discharge port portion of the powder and granular material supply and discharge device of FIG.

FIG. 7 is a partial cross-sectional view of a scraper member portion of a powder / granule supply / discharge device according to another embodiment of the present invention.

FIG. 8 is a partial cross-sectional view in which a part of a scraper member portion of a powder and granular material supply and discharge device according to another embodiment of the present invention is cut away.

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

10 is a partially enlarged cross-sectional view of a modified example of the step portion of the powder / granule supply / discharge device of FIG.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Discharge port 3 ... Rotating member 4 ... Scraper member 5 ... Fin member 6 ... Opening / closing member 7 ... Dispersing member 12 ... Stopper 14 ... Scraping 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) along the upper surface of the rotary member (3) and a scraper member (4) on the lower surface or side surface of the rotating member (3), the scraper member depending on the magnitude of the drag force received from the granular material. A supply / discharging device for a granular material, characterized in that the apparent density of the granular material is made constant by applying a controlled pressing force to the granular material by changing the angle or position. 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 characterized in that an opening / closing member (6) is arranged. 3. The powder / granule supply / discharge device according to claim 1 or 2, wherein one or more steps (1b) or grooves are formed concentrically on the bottom of the container (1), At least one of the steps (1b) or grooves in the groove is scraped and then scraped to make the bulk volume of supply and discharge constant, and a powder and particle supply and discharge device.