JP2942609B2 - Powder flow control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for controlling the flow rate of a granular material, in particular, a granular material that controls the amount of a granular material discharged from the inside of a storage tank to the outside with good responsiveness. The present invention relates to a flow control device.

[Prior Art] Conventionally, a granular material existing in a granular material storage tank has been sent to the outside by a device that scrapes out the material using a screw or the like.

However, a mechanism for sending out the granular material toward the screw had to be incorporated in the apparatus, and the amount to be sent out was likely to vary. Further, since a force is applied to the screw in an unreasonable direction, damage to the machine is liable to occur, and further, depending on the type of the granular material, it is very difficult to scrape the screw.

In addition, the screw requires a space for rotation, requires a large device, and has a so-called surrounding portion that does not carry the granular material, so that the energy efficiency is low.

In order to solve such absurdities, for example, we stopped scraping, put the powder in a vertical tank, incorporated a device to prevent stagnation of the powder inside, and added a device to adjust the amount of discharged powder in the tank at the bottom of the tank A conceived device can be considered.

[Problems to be Solved by the Invention] However, in such a conventional apparatus, since it is necessary to separately incorporate the granular material stagnation prevention device and the granular material discharge adjusting device, the space is occupied by them. Too much, the size of the storage tank is reduced, which not only leads to a reduction in efficiency, but also causes a problem of cooperation between two separate devices.

At the same time, it was not possible to flexibly respond to external requests.

Object of the invention The present invention has been made in view of the above conventional problems,
An object of the present invention is to provide a granular material flow control device having a simple and robust mechanism and capable of supplying a granular material appropriately following an external desired amount.

[Means for Solving the Problems] In order to solve the above-mentioned object, in order to solve the above-mentioned problem, a storage tank body temporarily storing powder and granules and having an outlet for the powder particles at a lower portion, and a fixed lower part below the outlet of the storage tank body. A receiving plate that is arranged at intervals and that smoothly discharges the particles in the storage tank body to the outside by vibrating motion, and a receiving plate that receives the granular powder discharged from the storage tank body by the receiving plate. A receiving drum rotating at a constant speed disposed below the receiving drum, a load cell for measuring the weight of the granular material accumulated in the receiving drum, and a vibration of the receiving plate based on a measured value from the load cell. The controller comprises a controller for controlling the strength and the size of the outlet of the granular material, and is characterized in that the amount of the granular material discharged to the outside is controlled.

[Operation] According to the present invention configured as described above, the receiving plate vibrates by the rotation driving means of the motor. Therefore, when the granular material is accumulated and stored in the storage tank main body, the granular material on the receiving plate is subjected to the swing dispersion action in the horizontal direction.

Therefore, the particles accumulated and stored inside the storage tank main body can be smoothly placed on the outside of the storage tank by the effective action of preventing the stagnation of the particles, which effectively eliminates the bridge generated inside the storage tank by the vibration action. Sent to the drum.

Further, since the receiving drum rotates at a constant speed, the powder on the receiving drum is discharged to the outside by a scraper which is joined to the receiving drum so as to fall to an external hopper.

On the other hand, since the amount of powder and particles sent to the receiving drum is proportional to the output of the motor connected to the receiving plate, the output of the motor is controlled based on the weight measurement value from the load cell connected to the receiving drum. On the other hand, by controlling the size of the outlet of the granular material at the lower part of the storage tank body, the amount of the granular material sent out to the receiving drum and, consequently, the amount of the granular material discharged from the receiving drum to the outside are reduced. Can be effectively controlled.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic longitudinal sectional view of a flow control device for a granular material, which is one of preferred embodiments of the present invention. A receiving plate 12 facing the entire surface of the storage tank body 10 with a predetermined gap is disposed at the bottom of the opening of the storage tank body 10 filled with the granular material, and the receiving plate 12 is disposed below the storage tank body 10. Then, the granular material is received and held inside the storage tank body 10.

As is clear from the figure, the receiving plate 12 in the embodiment has an umbrella-shaped conical shape, and is configured to promote the action of discharging the powder and granules from the storage tank body 10 as described later.

A supporting frame 14 is integrally fixed to the receiving plate 12 at a lower central portion of the receiving plate 12, and an eccentric cam 18 is mounted on a peripheral edge of the supporting frame 14 through a bearing 16 incorporated in an inner wall portion of the supporting frame 14. The rotating shaft 20 is supported.

As a result, the receiving plate 12 makes an oscillating motion by the driving action of the motor 26, and causes the powder particles filled in the storage tank main body 10 to be moved between the storage tank main body 10 and the receiving plate 12 as described later. Through the receiving drum 5 rotated at a constant speed by the motor, and further discharged to the outside by the action of the scraper 2.

On the other hand, since the receiving drum 5 is provided with the load cell 4, the weight of the granular material accumulated in the receiving drum 5 can be determined. That is, the weight is measured based on a change in current caused by a change in resistance value due to the weight of the bridge circuit existing in the load cell.

In this embodiment, three load cells are arranged at equal intervals along the circumference of the lower part of the receiving drum 5, and the average value of the measured values is used to determine the amount of the powder and granules accumulated in the receiving drum 5. A controller is provided for controlling the rotation speed of the variable motor 26 connected to the receiving plate 12 and the size of the outlet of the granular material at the lower part of the storage tank body. As a result, the amount of the granular material discharged from the storage tank main body 10 to the receiving drum 5 and thus the amount of the granular material discharged outside by the action of the scraper 2 can be effectively controlled.

 Hereinafter, the operation of the device of the present invention will be described.

By the driving of the motor 26, the receiving plate 12 integrally fixed to the rotating shaft together with the rotating shaft starts vibrating in a substantially horizontal plane.

As described above, the rotation axis is longer than the center of the receiving plate 12 by a distance L.
Eccentrically connected, the simple rotational movement of the motor is converted into the oscillating movement of the receiving plate 12 and, consequently, the powder deposited on top of the receiving drum 5
It acts to discharge to

Here, in the present embodiment, the receiving plate 12 is formed in an umbrella-shaped conical shape as described above, so that the vibration motion in the horizontal plane is accompanied by a slight reciprocating swing in the vertical direction at the same time. Therefore, by simply rotating the rotation shaft itself at the same position and in the same direction, it is possible to generate a composite swing operation in which both the horizontal direction and the vertical direction are combined,
The discharge of the granular material from the gap with the storage tank main body 10 can be effectively promoted while preventing the generation of the bridge in the storage tank main body 10.

In addition, since the receiving plate 12 is formed in a conical shape, the granular material can be continuously and quickly sent out to the receiving drum 5 very effectively without stagnation on the receiving plate 12.

Further, the electric side wall plate 1 can be freely moved up and down simultaneously with or separately from the variable motor 26 under the control of the controller 6. Accordingly, in addition to controlling the amount of the granular material discharged by controlling the vibration motion of the receiving plate 12, an auxiliary control can be performed, and a control that can flexibly correspond to the type of the granular material can be performed. Further, by installing a separate mixer, the present invention can be applied to mixed powders.

In the above embodiment, the receiving plate 12 is formed as an umbrella-shaped conical shape. However, the present invention is not limited to this. .

As described above, the vibration drive mechanism for discharging the granular material according to the present embodiment mainly includes a single receiving plate, which includes only a rotating shaft supported eccentrically and driving means for driving the rotating shaft. Therefore, it is possible to reliably break down the bridge inside the storage tank main body and the like due to the resulting composite swing operation, with a very simple configuration, extremely efficiently and minimizing the mechanical loss and the like, and In terms of space, the basic operation is vibration in the horizontal plane direction, so it is minimized to the space of the receiving plate, a device for preventing stagnation of particles is incorporated in the storage tank, and a device for adjusting the amount of discharged particles at the outlet of the storage tank , It is possible to more effectively increase the desired quantitative discharge effect than the case where.

[Effect of the Invention] As described above, according to the present invention, since the receiving plate receiving the granular material in the storage tank main body is configured to vibrate in a substantially horizontal plane to discharge the granular material, it is very difficult to discharge the granular material. With a simple structure, it has an effect of preventing powder flow stagnation and also has an unexpectedly high discharge promotion effect.Since it is connected to the controller, it can supply a stable amount of powder and granular material appropriately in response to external demands. It became so. In addition, a high-performance powder flow control device with high mechanical strength and low cost was realized.

[Brief description of the drawings]

 FIG. 1 is a longitudinal sectional view showing the structure of the device of the present invention, and FIG. 2 is a schematic sectional view taken along the line II-II in FIG. DESCRIPTION OF SYMBOLS 1 ... Current side wall plate 2 ... Scraper 3 ... Constant drive motor for rotating with an external drum 4 ... Load cell 5 ... External receiving drum 6 ... Controller 7 ... External hopper 8 ... Rotate receiving drum Gear 9 for driving side wall plate 10 Reservoir body 12 Receptor plate 14 Receptor plate support frame 16 Bearing 18 Eccentric cam 20 Spring 22 Support plate 26 Variable Motor 30 ... Load cell support

Claims (2)

(57) [Claims] Claims: 1. A storage tank body for temporarily storing granules and having an outlet for the granules at a lower portion, and a storage tank main body having a predetermined interval below the storage main body outlet,
A receiving plate for smoothly discharging the granular material in the storage tank body to the outside by vibrating motion; and a receiving plate disposed below the receiving plate so as to receive the granular powder discharged from the storage tank main body. An external receiving drum that rotates at a constant speed; a load cell that measures the weight of the granular material accumulated in the external receiving drum; and a controller that controls the vibration intensity of the receiving plate based on the measurement value from the load cell. And a flow controller for controlling the flow rate of the granular material discharged to the outside. 2. A storage tank body for temporarily storing powders and granules, the storage tank main body having an outlet for the powders and granules at a lower portion, and a storage tank main body arranged at a fixed interval below the outlet of the storage tank main body, the storage tank being vibrated. A receiving plate for smoothly discharging the powders and granules in the main body to the outside; an electric side wall plate installed around the outlet of the storage tank main body; and a receiving plate for receiving the powders and particles discharged from the storage tank main body. An external receiving drum that rotates at a constant speed disposed below the receiving plate, a load cell that measures the weight of the granular material accumulated in the external receiving drum, and a measurement value from the load cell. And a controller for controlling the vibration intensity of the receiving plate and the position of the electric side wall plate, and controlling the amount of the granular material discharged to the outside.