JPS6118642A - Powdery particle feeding apparatus - Google Patents

Abstract

PURPOSE:To prevent the discharge in unstationary jet flow of powdery material by dividing the inside of a storage tank into three parts in the vertical direction and installing a load supporting body spread downward into the first chamber and a conveyance blade into the second chamber and forming a passage which does not coincide in the vertical direction with the both chambers. CONSTITUTION:Powdery material is supplied into the first chamber 15 and flows in the I direction by a load supporting body 24 and reduces the powder pressure applied into the first powder passage 17. Then, the powder is introduced into the second chamber 16 through the gap between a load supporting body 24 and a bulkhead 13 and the powder passage 17 from the opening 28 of the load supporting body 24 and the gap II between the load supporting body 24 and a cylindrical body 9. Since the second power passage 19 deflects by 180 deg. from the above- described passage 17, powder material is collected into the second chamber 16, and allowed to circulate by a conveyance blade 25. When a vacant space is formed after the powder in the third chamber 18 is carried-out by a screw 21, powder material falls by a proper amount into the third chamber 18 from the second chamber 16 through the powder passage 19.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a powder supply device.

Conventional Structure and Problems Conventionally, this type of supply device has been structured as shown in FIG. (υ is a storage tank that temporarily stores powder and granules, and is composed of a large first chamber (2) and a second chamber (4) that communicates with this first chamber (2) via a powder path (3). The second room (4
) is transported laterally to the discharge port (6) by the screw (5). (7) is an agitator concentric with the screw (5), and like the screw (5), the reduction gear (8
) is rotationally driven by the output shaft of the second chamber (4) to stir the powder and granular material in the second chamber (4) to prevent arching and the like.

In this way, it is used to control the rotational speed of the screw (5), for example, and discharge a constant amount from the discharge port (6). However, in the conventional configuration as shown in Fig. 4, when handling powder with high fluidity, the powder is discharged from the discharge port (6) due to the pressure of the powder instead of the horizontal feed by the screw (5). There is a drawback that a constant flow rate cannot be discharged because a so-called "flushing jet state" in which the body swells occurs.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a powder supply device that can prevent the above-mentioned flushing even on a platform that handles powder and granules with high fluidity.

Structure of the Invention The powder supply device of the present invention has a first feeder in the vertical direction inside the storage tank.
．． It is divided into eight second and third chambers, and the first chamber is provided with a widening load support near the bottom.

In addition, powder and granule paths are formed in the partition wall between the first and second chambers and the partition wall between the second and third chambers at positions that do not coincide with each other in the vertical direction, so that the powder and granule are transported into the second chamber. It is characterized in that it is provided with wings and that the powder and granular material is cut out from the third chamber.

DESCRIPTION OF EMBODIMENTS Seven embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

Figure 1 shows a device that can stably discharge even highly fluid powder without flashing.

(9) α(I(6) is the member constituting the storage tank (2) 1
A cylindrical body (9) with open ends is placed on a bottomed cylindrical body QQ via a partition μs, and the cylindrical body (9) and QQ
The relative position between the cylindrical body (9) and QQ is restricted by a latch σ◆ attached to the appropriate position in the circumferential direction, and the partition wall σ1 is also
It is held and positioned by the o5 is the first chamber surrounded by the cylindrical body c9) and the partition wall 0, qQ is the second chamber surrounded by the cylindrical body 0[) and the partition opening; and communicates with each other via a first powder path 0η bored in the partition wall a3. 01G is a third chamber surrounded by a box o1 that communicates with the second chamber M via a second powder path α bored at the bottom of the cylindrical body GO; ) is equipped with four screw casings,
Screw from the third chamber a camphor to the screw casing (7)? V is arranged. The powder is discharged into the screw casing through a discharge port drilled at the tip of the screw casing.

The screw (2) is an agitator arranged concentrically with the screw (2).

In addition, (I) is an umbrella-shaped load support placed in the first chamber (a) so as to approach the bulkhead μs and widen at the bottom, and (ii) is an umbrella-shaped load support placed in the second chamber aQ. The load support body (1) and the load support body (1) are mounted on a rotary output shaft drawn out from a speed reduction device (2) that rotationally drives the screw and agitator.

In addition, considering the case of highly fluid powder and granule material, the first powder and granule path aη and the second powder and granule path Ql are assumed to be at positions that do not coincide in the vertical direction, as shown in Fig. 1. They are 180° different from each other in the horizontal plane.

With this configuration, when powder or granules are introduced into the first chamber (G), part of the load is supported by the load support (goods) and the flow of the powder is bent in the direction of the arrow 1. The powder pressure applied to the first powder route Q can be reduced. The powder and granules in the first chamber (c), whose pressure has been reduced in this way, pass through the opening (c) of the load support (material) that rotates once, and between the load support (■) and the cylindrical body (9). From the gap I, the powder passes through the gap t between the load support body and the partition wall □□□, reaches the first powder path side, and flows into the second chamber 01. Here, the second powder path (6) which serves as the outlet of the second chamber σQ is.

As mentioned above, since the granular material path αη is deviated by 18o0 from the first granular material path, the granular material that has flowed into the second chamber aQ from the first chamber (end) is collected in the second chamber, and then transferred to the second chamber. It is circulated by (to) the conveyor blade). When the powder (into the third chamber) is carried out by the screw (2) to create a space, it is transferred from the second chamber αQ to the third chamber 0 via the second powder path σ1.
Powder falls on Enoki.

In the above embodiment, the load support C! Rotate ◆ and tighten.

Arching in the first chamber αQ can be prevented when the flowability of the handled powder or granular material is low, and when the protrusions 4 are provided on the load support, the arching prevention effect is further improved. In particular, in the case of an apparatus that handles only highly fluid powder or granular materials, there is no need to rotate the load support (goods) because arching is inevitable.

In the above embodiment, since the partition wall egg was clamped between the cylindrical body (9) and QQ, the latch Q< was removed and the partition wall 03 was rotated.
1st as shown in the figure. Since the angle θ of the second powder path α71 (11) can be changed according to the fluidity of the powder, the time delay required for the powder to start flowing immediately after startup can be suppressed slightly.

In the above embodiment, the height C of the conveyor blade (to the conveyor blade) was lower than the height B of the second chamber aQ, but this can be changed by bringing B=C closer to the second chamber aQ as shown in FIG. room QQ
Improves sealing performance.

As described in the detailed description of the invention, according to the powder supply device N of the present invention, the first. It is divided into three chambers, a second and a third, and the first chamber is provided with a load support body with a wide skirt near the bottom, and a partition wall between the first and second chambers and a partition between the second and third chambers. Powder and granule paths are formed in the partition walls between the chambers at positions that do not coincide with each other in the downward direction, and powder and granule transport blades are provided in the second chamber, and the granule is cut out from the third chamber. 1st
The powder pressure acting from the chamber to the second chamber is sufficiently attenuated by the load support, and the powder and granule paths on the inflow and outflow sides of the second chamber are staggered, so that the powder and granule have high fluidity. Even if the material is powdery, it is possible to supply just the right amount of powder or granules from the second chamber to the third chamber using the conveyor blades, and it is possible to stably cut out powder or granules that have high fluidity and are susceptible to flushing. It is something.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the powder supply device according to the present invention, in which (a) is a vertical cross-sectional view, 1 (b) is a horizontal cross-sectional view of the main part, and Fig. 2 is a set position of the partition wall as shown in Fig. 1. Figure 4 is a longitudinal sectional view of a conventional powder supply device. (9.1...Cylindrical body, (2)...Storage tank, a3.
... Bulkhead, (14... Latching fittings, (lG = First chamber,
an...Second chamber, αη...First powder and granule route, θt...Third chamber, four...@2 powder and granule route, @...screw, (a). ...Discharge port, (Foundation)...Load support, (2)...Transportation wing

Claims (1)

[Claims] 1. The interior of the storage tank is vertically divided into three chambers, first, second, and third, and the first chamber is provided with a load support body with a wide skirt near the bottom, and Powder paths are formed in the partition walls between the first and second chambers and between the second and third chambers at positions that do not coincide with each other in the vertical direction, and powder and granule transport blades are formed in the second chamber. A granular material supplying device which is provided with a granular material and cuts out granular material from a third chamber. 2. The first and second chambers of the storage tank are sandwiched between a cylindrical body with an open bottom and a cylindrical body with a bottom, and the granular material formed on the partition wall is released from the sandwiched state. 2. The granular material feeding device according to claim 1, characterized in that the relative positions of the path and the granular material path formed in the bottomed cylindrical body can be changed.