JP2507273B2 - Powder quantitative transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a powder quantitative transfer device.

In industries such as foods, pharmaceuticals, and new materials that handle powders, it is important to quantitatively supply or discharge powders during pulverization, drying, granulation, mixing, molding, reaction, packaging, etc. Is. Especially in the era of diversified high-tech products in recent years,
A correspondingly high degree of control is required, for which it is essential to supply or discharge the powder in a more precise, continuous and quantitative manner.

The present invention relates to a powder transfer device capable of performing continuous fixed amount supply or discharge as described above.

<Prior Art and its Problems> Conventionally, rotary feeders and table feeders have been used as powder quantitative supply devices. However, according to this type of conventional device, there is a limit to the number of rotations of the rotor and the table, and therefore, when a small amount of powder is supplied, the supply is intermittent.

Conventionally, belt feeders and apron feeders have been used as powder quantitative supply devices. However, according to this type of conventional device, although it is suitable for supplying a large amount of powder, it is not suitable for supplying a small amount of powder, and is not suitable for a closed structure for preventing contamination (for example, mixing foreign matter). There is a point.

Further, conventionally, there is a kind of screw feeder as a powder quantitative supply device. However, according to this type of conventional device, although the powder supply amount can be easily controlled, there is a problem in that the powder is compressed, deformed, and crushed.

Conventionally, there is a type of electromagnetic vibration feeder as a quantitative powder supply device. However, according to this type of conventional apparatus, there is a problem in that the supply amount of the powder varies significantly depending on the physical properties and shape of the powder.

<Problems to be Solved by the Invention and Means for Solving the Problems> The present invention provides a new quantitative transfer device for solving the above-mentioned conventional problems.

Therefore, the present invention is that a container equipped with 1 to several vibration sources is supported by elastic bodies such as 1 to several springs so as to give some kind of free movement, and the container is provided with a powder. A body supply port and a powder discharge port equipped with a throttle valve are opened, and a gas dispersion material is further mounted below the powder discharge port, and a vibration source is activated to vibrate the container. By blowing gas into the container through the gas dispersion material, the powder supplied from the powder supply port is fluidized and the throttle valve is operated from the powder discharge port positioned in the fluidized bed height of the powder. The present invention relates to a powder quantitative transfer device configured to quantitatively discharge the powder.

The essential point in the present invention is that even if the powder is a fine powder that cannot be fluidized by the conventional fluidized bed apparatus, the powder is subjected to a vibration that gives some kind of free movement, and the powder is also used. When a dispersed gas is blown into the powder from below, the powder takes advantage of the unique phenomenon of forming a stable fluidized bed with little bubbling and slugging, as if it were a liquid, and under such a phenomenon, it is homogeneous within the fluidized bed height. It is in the process of transferring powder in various dispersed states together with gas.

Hereinafter, the configuration of the present invention will be described in more detail with reference to the drawings.

<Embodiment> FIG. 1 is an overall view showing an embodiment of the present invention in a partially sectional state. A cylindrical vertical container 11 is erected on a mounting frame 12, and the mounting frame 12 equipped with a vibration motor 13 is a spring.
It is supported by the base 16 at 14,15. The vertical container 11 has a gas discharge port 21, a powder supply port 22, and a powder supply port 22 in order from the upper side to the lower side.
The fine powder return port 23 and the powder discharge port 24 are opened, and the powder supply port
A powder dispersion material 31 is mounted between the fine powder return port 23 and the fine powder return port 23 above the fluidized bed of the powder A, which will be described later.
A gas dispersion material 32 is mounted below the. Then, the gas discharge port 21 is connected to the dust collector 41, and fine particles that are scattered along with the gas from the gas discharge port 21 are collected by the dust collector 41 and the valve 51 is used.
Via the valve, the powder supply port 22 is connected to the raw material container 42 via the valve 52, above the powder dispersion material 31 and below the gas dispersion material 32 in the vertical container 11. By adjusting the opening degree of the valve 52 according to the pressure loss during the period, the powder supply amount from the raw material container 42 to the powder supply port 22 is controlled, and the powder discharge port 24 is provided with a throttle valve 61. Then, by operating the throttle valve 61 while confirming the value of the flow meter 71 attached to the rear of the dust collector 43, a fluidized bed is formed in the vertical container 11. An appropriate amount of the powder A is discharged from the powder discharge port 24 and collected by the dust collector 43.

The vibration motor 13 is operated to vibrate the vertical container 11, and thus the powder dispersion material 31 and the gas dispersion material 32 are also vibrated.
Furthermore, from compressor 81 to valve 53, flow meter 72, valve
When the gas is blown into the vertical container 11 through 54 and the gas dispersion material 32, the powder A in the vertical container 11 forms a stable fluidized bed as if it were a liquid.
From the valve 52, the powder supply port 22 and the powder dispersion material 31 to continuously supply the powder A into the vertical container 11, while the powder A forming a fluidized bed is supplied to the inside of the fluidized bed height. The powder A is discharged through the throttle valve 61 from the powder discharge port 24, which is positioned at, and the discharged powder A is collected by the dust collector 43 and then supplied to the next step.

2 to 5 are cross-sectional views of the essential parts showing another embodiment of the present invention. 2 and 3 are the same as in the case of FIG. 1 except for the description thereof, except that the vertical containers 17 and 18 have a throttle valve 62 within the height of the fluidized bed of powders B and C. , 63 are provided with powder discharge ports 25, 26, and the gas dispersion materials 33, 34 are mounted below the powder discharge ports 25, 26, and the gas dispersion materials 33, 34 are respectively located at the center. The gas dispersion materials 33a and 34a and the gas dispersion materials 33b and 34b on the periphery thereof are divided into two parts, and the gas dispersion material 34b is inclined in an inverted conical shape. In these examples, by controlling the amount of gas blown between the gas dispersion material 33a, 34a and the gas dispersion material 33b, 34b, respectively, the powder B,
The flow state of C can be changed appropriately. In addition, in FIGS. 4 and 5, the other configurations which are not described are the same as those in FIG. 1, but the powder discharge ports 27 and 28 equipped with the throttle valves 64 and 65 are In the case of 27, it is opened at the tip of the pipe inserted from above the gas dispersion material 35 into the height of the fluidized bed of the powder D in the vertical container 19, and in the case of the powder discharge port 28, gas dispersion is performed. It is provided at the tip of a pipe inserted from below the material 36 into the fluidized bed height of the powder E in the vertical container 20. Also in these embodiments, the gas dispersion materials 35 and 36 can be divided into two as described above, and the powder discharge ports 27 and 2
The opening shape of 8 is a simple tubular shape, a slit shape, a net shape, or the like.
Either is fine.

Needless to say, the illustrated embodiment is a preferred example of the present invention, and the present invention is not limited to the embodiment. Although illustration is omitted, the amount of powder supplied, the amount of gas blown in, and the amount of powder discharged affect the formation of a fluidized bed of powder in the container, and these are the fluidized bed height and pressure of the powder in the container. Since it has a close relationship with the loss, the powder discharge amount is controlled by the throttle valve, while the powder supply amount and the gas injection amount are controlled by the fluidized bed height of the powder in the container or pressure loss with this. It is effective to control by using, and it is also effective to gradually increase the diameter of the container upward.

In the present invention, the number of vibration generation sources represented by the vibration motor and the number of elastic bodies represented by the springs can be appropriately selected in relation to the shape and size of the container, for example. Further, as the powder dispersion material or the gas dispersion material, punching metal, sintered metal, unglazed, filter cloth or the like having an opening diameter according to each purpose can be appropriately used. Depending on the type of powder and the purpose of transfer, the blown gas can be an inert gas, the inside of the container can be operated under pressure, and the fluidized bed of the powder can be distributed over the entire area of the container. The powder outlet, if formed, can also be opened at the top of the container.

<Operation> Next, the operation of the present invention will be described with reference to a concrete use state of the embodiment shown in FIG. Diameter 300 mm x height 1000 mm Vertical container 1
1 inside, true specific gravity 3.3, maximum particle size 61μm, average particle size 22-26μ
m white alumina abrasive (hereinafter simply referred to as powder)
Was filled to a height of 300 mm. The gas dispersion material 32 has an opening diameter of 25.
It is a multilayer porous metal sintered plate of μm. Operate the vibration motor 13 to move the vertical container 11 to an amplitude of 1.0 mm and a frequency of 1500 r.pm.
And the flow velocity of air through the gas dispersion material 32.
It was blown at 4 cm / sec (the flow velocity in the upper part of the vertical container 11). The surface of the powder swelled in a flat shape and formed a stable fluidized bed as if it were a liquid without bubbling or slugging, and a clear stirring or swirling motion was observed in the fluidized bed. Then, countless small bubbles were generated from the surface of the powder that had risen. In this state, the raw material container 4
2, the powder is continuously supplied into the vertical container 11 through the valve 52, the powder supply port 22, and the powder dispersion material 31, while the powder discharge port 2
4, the powder was continuously discharged through the throttle valve 61 and the dust collector 43. During continuous operation for 1 hour, the powder discharge amount measured every 10 seconds was 51 ± 0.2 g / second, the error was 0.4%, and there was no contamination. Similar results were obtained even when the powder was intermittently supplied, and it was found that the fluidized bed of the powder itself had a certain buffering action.

<Effects of the Invention> As described above, according to the present invention, a stable continuous quantitative supply or discharge of the powder is carried out regardless of the physical properties and shape of the powder and the size of the transfer. Further, there is an excellent effect that the powder is not deformed or contaminated during the transfer.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention in a partially sectional state, and FIGS. 2 to 5 are sectional views showing another embodiment of the present invention separately. 11,17 ~ 20 ... Vertical container 12 ... Mounting frame, 13 ... Vibration motor 14,15 ... Spring, 16 ... Base 22 ... Powder supply port, 24-28 ... Powder discharge port 31 …… Powder dispersant 32〜36 …… Gas dispersant 61〜65 …… Throttle valve AE ・ ・ ・ Powder

Claims (3)

(57) [Claims] 1. A container equipped with one to several vibration sources is supported by one to several elastic bodies such as springs so as to give some kind of free movement, and the container contains powder. A supply port and a powder discharge port equipped with a throttle valve are opened, and a gas dispersion material is further mounted below the powder discharge port. By blowing gas into the container through the dispersant, the powder supplied from the powder supply port is fluidized and the throttle valve is operated from the powder discharge port positioned in the fluidized bed height of the powder. A fixed-quantity transfer device for powder, which is configured to discharge a fixed amount. 2. A quantitative transfer of powder according to claim 1, wherein the amount of powder supplied and / or the amount of gas blown in is controlled by the fluidized bed height and / or pressure loss of the powder in the container. apparatus. 3. The powder quantitative transfer device according to claim 1 or 2, wherein the powder dispersion material is mounted above the fluidized bed height of the powder in the container.