JPS6111857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder supply device for cutting out powder and granules from a storage tank using a raw material cutting device.

Conventionally, the raw material inlet of the raw material cutting device is connected to the raw material outlet of the storage tank, and the raw material cutting device cuts out the powder discharged to the raw material receiving port, but it simply connects the storage tank and the raw material. Since the configuration is simply connected to the cutting device, the following problems occur.

- The shelf hangs up in the storage tank, preventing powder from entering the cutting device.

- A large amount of adhesion or rat holes occur in the storage tank and the entire amount cannot be discharged.

- Raw material flows out from the raw material cutting device due to flushing and cannot be controlled by the raw material cutting device alone.

Furthermore, when quantitative cutting is performed, the following problems occur in addition to the above problems.

- If powder and granules are being cut out while phenomena such as shelf hanging and load collapse occur repeatedly in the storage tank, the amount cut out per unit time will change significantly.

- The pressure at the cutting section changes depending on the amount of powder in the storage tank, and the cutting amount changes accordingly.

The present invention has been made in order to avoid the above-mentioned problems, and an object of the present invention is to provide a powder supply device that can smoothly cut out powder and granule in a storage tank.

The present invention connects a bottom discharge port of a storage tank to a raw material receiving port of a raw material cutting device, and also connects an umbrella body, which has a raw material falling passage formed on a slope and is driven to rotate around an axis, to the inside of the storage tank. It is arranged above the bottom discharge port to support pressurization of the raw material toward the bottom discharge port, and is placed close to the top surface of the umbrella body so as to send the raw material from the raw material falling passage of the umbrella body to the bottom discharge port. By extending the scraper from the fixed side and using the rotating umbrella body,
The raw material is rotated against the adhesion force to the inner wall of the storage tank to prevent it from sticking, and the raw material cut out by the raw material cutting device is delivered from the raw material falling passage to keep the powder pressure at the raw material receiving port constant. This is to maintain constant flow rate fluctuations.

In addition to the above configuration, a cylindrical body with a lower concave rotatably driven around the axis is disposed near the upper part of the umbrella body, and a fixed side is disposed close to the inner circumferential surface of the cylindrical body. By extending the second scraper from the storage tank, even in the case of powder or granular materials whose adhesion to the inner wall of the storage tank cannot be countered by the rotation of the umbrella, the rotation can be ensured.

Furthermore, in addition to this cylindrical body and the second scraper, by providing a third scraper that rotates along the inner wall of the storage tank, even highly adhesive particles can be stored over a wide range. It can be rotated while cutting off the inner wall of the tank, and the entire amount can be reliably discharged even if the powder or granular material has a strong adhesive force.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 7.

In FIG. 1, 1 is a storage tank, 2 is a screw feeder as a raw material cutting device in which a raw material receiving port 4 is connected to a bottom discharge port 3 of the storage tank 1, and 5 is a sloped surface as shown in FIG. The umbrella body is provided with a raw material drop port 6 as a raw material drop passage, and the lower end thereof is attached to the lower end of a rotating shaft 7 extending above the bottom discharge port 3 . Reference numeral 8 denotes a first scraper extending from the fixed side of the storage tank 1, the tip of which is close to the upper surface of the umbrella body 5.

With this configuration, most of the raw material (powder) in the storage tank 1 is supported by the slope of the umbrella body 5, and no pressure is applied to the bottom discharge port 3 side by the raw material. Further, when the rotating shaft 7 is rotated in the direction of arrow A, the umbrella body 5 rotates around its axis, and the umbrella body 5
When the rotational force acting from the umbrella body 5 exceeds the adhesion force of the raw material to the storage tank 1, the raw material supported by the
It is cut off by the inner wall of the storage tank and begins to rotate in the direction of arrow A. The first scraper 8 acts on this rotating raw material. That is, when a gap is created in the raw material receiving port 4 after being cut out by the screw feeder 2, the raw material scraped by the first scraper 8 passes through the raw material drop port 6 of the umbrella body 5 by the amount of the gap. It is sent downward without any shortage. When the gap disappears, the powder pressure at the entrance and exit of the raw material drop port 6 becomes the same, so that the powder is not sent from the raw material drop port 6 to the raw material receiving port 4. Therefore, the powder pressure in the raw material receiving port 4 can be kept constant, and the flow rate can be kept constant.
Further, since the raw material rotates as the umbrella body 5 rotates, there is no possibility that the raw material will adhere to the storage tank 1. Furthermore, since the umbrella body 5 is used to support the raw material in the storage tank 1 from below at a position above the bottom discharge port 3, the overall shape of the raw material collected in the raw material fall port 6 formed on the slope of the umbrella body 5 is is not a flat plate but a curved surface that looks like a bent disk, so the force acting on it is asymmetric and varies depending on the part, causing the first scraper 8
Therefore, even if the amount cut out by the screw feeder 2 is smaller than the amount to be sent to the raw material receiving port 4, the raw material drop port 6 will not be clogged.

Further, in the above embodiment, the umbrella body 5 has been described as having a circular cross-sectional shape, but this is different from that shown in FIG.
As shown in b, the same effect can be obtained even if the cross-sectional shape is polygonal. In this case, clogging of the raw material drop port 6 can be more reliably prevented by, for example, providing the raw material drop port 6 so as to span two surfaces of the slope. In the embodiment described above, the raw material falling passage is a hole, but this can also be a notch in contact with the lower part of the umbrella body 5.

Figures 4 and 5 show an apparatus that is effective when the adhesive force of the raw material is large. 10 is a cylindrical body with a downward taper, and the arm 1 is positioned near the top of the umbrella body 5.
1 to the rotating shaft 7. A second scraper 12 extends from the storage tank 1 along the inner peripheral surface of the cylindrical body 10.

With this configuration, in order to support the raw material in the storage tank 1 over a wider area than in the case of FIG. The information is transmitted to the raw material more reliably, and the raw material with a strong adhesive force also rotates along with the umbrella body 5 and the cylindrical body 10. Since the raw material along the inner circumferential surface of the cylindrical body 10 is scraped off by the second scraper 12, the raw material does not adhere to the cylindrical body 10, and the raw material is removed from the first scraper as in FIG. The scraper 8 sends the raw material downward from the raw material drop port 6.

Figures 6 and 7 show that the purpose can be achieved even in cases where the adhesion of the raw material is so great that the equipment shown in Figure 4 cannot be expected to be sufficiently effective.
a third scraper 1 rotating along the inner wall 9 of the
3. Note that here, the cylindrical body 10 is connected to the rotating shaft 7 via the third scraper 13.

With this configuration, when the rotating shaft 7 is driven to rotate, the umbrella body 5 and the cylindrical body 10 rotate, and the third scraper 13 cuts off the adhesion between the raw material and the inner wall 9, so that it can be hung on a shelf or Rat holes do not occur, the raw material rotates reliably even if the adhesion force is large, and the raw material can be sent downward from the raw material drop port 6 by the first scraper 8.

In the embodiments shown in FIGS. 4 and 6, the rotating shaft 7 is one axis, but it is also possible to use two axes to drive the umbrella body 5 and the cylindrical body 10 at different rotational speeds.

Further, as a driving means for the rotating shaft 7 in each of the above embodiments, it is conceivable to obtain rotational force from the driving section of the cutting device 2 via a transmission means, or to provide a dedicated electric motor.

As explained above, according to the present invention, it is possible to eliminate the adhesion of raw materials to the storage tank, avoid the occurrence of shelving, rat holes, etc., and also to keep the powder pressure at the raw material receiving port of the raw material cutting device constant. , the cutting amount can be kept constant regardless of the amount of raw material stored in the storage tank.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the powder supply device, Fig. 2 is a perspective view of the umbrella shown in Fig. 1, and Fig. 3 a and b are the umbrella. A perspective view of another embodiment of the body and a partially enlarged longitudinal cross-sectional view thereof, and FIGS. 4 and 5, and FIGS. 6 and 7 are partially cutaway side views of the other embodiment of FIG. 1, respectively. FIG. 2 is a perspective view of its main parts. 1... Storage tank, 2... Screw feeder [raw material cutting device], 3... Bottom discharge port, 4... Raw material receiving port, 5
... Umbrella body, 6... Raw material falling port, 7... Rotating shaft, 8... First
scraper, 9...inner wall, 10...cylindrical body, 11
...Arm, 12...Second scraper, 13...Third
scraper.

Claims (1)

[Scope of Claims] 1. The bottom discharge port of the storage tank is connected to the raw material receiving port of the raw material cutting device, and the umbrella body, which has a raw material falling passage formed on the slope and is driven to rotate around its axis, is connected to the storage tank. Arranged above the bottom outlet in the tank to support pressurization of the bottom outlet by the raw material,
A powder supply device in which a scraper is extended from the fixed side close to the top surface of the canopy so as to feed the raw material from the raw material falling passage of the canopy to the bottom discharge port side. 2. The powder supply device according to claim 1, wherein the umbrella body has a circular cross-sectional shape. 3. The powder supply device according to claim 1, wherein the umbrella body is formed to have a polygonal cross-sectional shape, and a raw material falling passage is formed over two or more sides. 4 Connect the bottom discharge port of the storage tank to the raw material receiving port of the raw material cutting device, and connect the umbrella body, which has a raw material fall passage formed on the slope and is driven to rotate around its axis, to the bottom discharge port in the storage tank. It is arranged at the upper position to support the pressurization of the raw material toward the bottom discharge port,
A first scraper is installed close to the upper surface of the umbrella body and extends from the fixed side so as to send the raw material from the raw material falling passage of the umbrella body to the bottom discharge port side, and a cylinder with a lower depression is driven to rotate around the axis. A granular material supplying device, wherein a cylindrical body is disposed close to above the umbrella body, and a second scraper is extended from a fixed side close to the inner circumferential surface of the cylindrical body. 5 Connect the bottom discharge port of the storage tank to the raw material receiving port of the raw material cutting device, and connect the umbrella body, which has a raw material falling passage formed on the slope and is driven to rotate around its axis, to the bottom discharge port in the storage tank. It is arranged at the upper position to support the pressurization of the raw material toward the bottom discharge port,
The first one is placed close to the top surface of the umbrella body from the fixed side so as to send the raw material from the raw material falling passage of the umbrella body to the bottom discharge port side.
A scraper is extended, and a cylindrical body with a lower concave rotatably driven around the axis is arranged near the upper part of the umbrella body, and from the fixed side close to the inner circumferential surface of the cylindrical body. A powder supply device including a second scraper extending therefrom and a third scraper rotating along the inner wall of the storage tank. 6. The powder supply device according to claim 5, characterized in that the umbrella body is attached to one end of the rotation drive shaft, and the cylindrical body is attached to the rotation drive shaft via a third scraper. .