JPH08188256A - Powder feeding device - Google Patents

Abstract

PURPOSE: To provide a powder feeding device which is constituted to prevent residence of a powdery material in the spot of the delivery port of a storage chamber evenly and smoothly deliver the powdery material through the whole surface of the delivery port and have high powder feed precision. CONSTITUTION: A part of the lower side wall 2 of a storage chamber 1 to contain a powdery material is opened and forms a powdery material delivery port 3. A discharge chamber 5 communicated with the powdery material delivery port 3 and the bottom of which is released is arranged to the outside of the lower side wall of the storage chamber 1. A powdery material feed disc 8 to receive the powdery material dropped through the opening of the bottom of the discharge chamber 5 and forward the powdery material is rotatably arranged. A screw conveyor 17 to forcibly feed the powdery material in a direction reverse to the forwarding direction of the powdery material feed disc 8 is arranged in the discharge chamber 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder feeding device for discharging powder particles contained in a storage chamber, a hopper, a silo, and a tank (hereinafter simply referred to as a storage chamber) from the storage chamber.

[0002]

2. Description of the Related Art The present applicant has opened a part of a lower side wall of a storage chamber containing powder and granules, and moved it from this opening to a discharge chamber having an open bottom surface. We have developed a powder feeding device with a structure in which the powder is dropped and transferred to the transfer path for powder particles directly below the bottom surface. However, in this powder feeding device, the granular material is not stored in the transfer path at the upstream end of the discharge port and is almost empty, so the granular material from the bottom surface of the discharge chamber smoothly falls, and However, in the transport path below the bottom surface, which is on the downstream side, the particles that have fallen are loaded and stored in a high position, so that the particles that are loaded interfere with the particles that flow from the bottom of the discharge chamber. The body does not fall smoothly, and there is a phenomenon that powder particles accumulate in the internal space on the downstream side of the discharge chamber and become clogged.
There is a problem in that the amount of powder or granules cannot be discharged from the discharge port as designed. In particular, when this is a fixed quantity powder feeding device, the amount of powder fed cannot be accurately output, which is a cause of poor feed accuracy.

[0003]

The problem to be solved by the present invention is to solve these problems and to allow powder particles to be discharged uniformly and smoothly from the entire discharge port of the storage chamber, and the powder feeding accuracy is high. To provide a powder feeding device.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) A part of the lower side wall of a storage chamber containing the powder and granules is opened as a powder and granule discharge port, A discharge chamber communicating with the body discharge port and having an open bottom is provided outside the lower side wall of the storage chamber, and a powder / grain transfer path for transferring powder / granulate is provided immediately below the opening on the bottom of the discharge chamber. The powder feeding device is characterized in that a screw conveyor for forcibly feeding the powder particles is provided in the opposite direction to the powder particle feeding direction of the powder particle transfer path 2) Outer periphery of the lower storage chamber immediately below the bottom surface of the discharge chamber A powder / granule supply board that rotates the powder / granular material volume supply board is provided with a powder / granular material storage space for receiving the powder / granular material falling from the bottom of the discharge chamber, and the rotation trajectory between the powder / granular material storage rooms In the above 1), a discharge passage for discharging the powder or granules in the powder or granular material storage space to the outside is provided in the middle of In the powder device. Here, the powder or granular material transfer path may be a transport path for communication from the storage chamber to the next powder or granular material device, or may be a simple discharge path, or may rotate the lower outer periphery of the storage chamber to transfer the powder or granular material. It may be a powdery or granular material conveying path. Further, the transfer means of the powder transfer path is a method of storing the powder on the upper surface of the conveyor and transferring it.
A transfer system using a powder / granule rotary supply plate having a powder / granule storage space on the outer periphery may be used. In addition, the method of moving the granular material in the storage chamber to the discharge port is
There are methods such as forced feed and vibration with internal blades, and that method is not questioned.

[0005]

In the present invention, the powder or granular material in the storage chamber moves from the discharge port to the discharge portion due to the powder pressure or the like, and drops from the bottom surface to the powder or granular material transfer path below and is transferred. Since the conveyor is provided, a part of the powder or granules in the discharge part is forcibly fed in the direction of the powder or granule transfer path. The powder or granules staying in the inner space on the downstream side of the discharge part are forcibly fed in the upstream direction by the screw conveyor, and the powder or granules staying in the discharge part are agitated, and the powder or granule transfer path is smoothly transferred from the bottom surface of the discharge part. Transfer to. As a result, the powder or granules in the storage chamber can be stably fed to the transfer path at a set feed amount.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a rotating granular material supply plate is provided on the outer periphery of the storage chamber, and a plurality of blades are radially provided on the outer periphery of the granular material supply plate. A granular material accommodating space is formed by the outer peripheral side wall of the granular material supply board and the ring on the outer surface of the annular passage, and a bottom plate is opened in the middle of the rotation trajectory of the blades, and the granular material is discharged downward from this. It is a powder feeding device having a road structure.

FIG. 1 is a longitudinal sectional view of the embodiment, and FIG. 2 is A of FIG.
3A is a sectional view, and FIG. 3 is an explanatory view showing a main part of the embodiment.
In the figure, 1 is a storage chamber, 2 is a side wall of the storage chamber, 3 is a discharge port of the granular material on the side wall, 4 is a bottom surface of the storage chamber 1, 5 is a discharge chamber, 6 is a side wall of the discharge chamber, and 7 is discharge. An open bottom surface of the chamber 5, 8 is a granular material supply board, 9 is a blade radially protruding from the outer periphery of the granular material supply board 8, 10 is a fixed bottom board provided below the blade, and 11 is a blade 9 A bottom surface 10, a granular material storage space for accommodating a certain amount of the granular material 22 formed by the outer peripheral side wall of the granular material supply board and the annular road outer wall ring 23; 12 is a blade along the rotation trajectory of the blade 9; 9 a ceiling plate for closing the upper part, 13 a discharge part provided at a position outside the storage chamber on the opposite side of the discharge chamber 5, 14 an opening for powder particles that is opened in the bottom plate 10 forming the discharge part, and 15 a storage chamber 1 A raking blade provided at the bottom, 16 is a drive unit for rotating the raking blade and the powder and granular material supply board 8, 17 is a screw conveyor of the discharge chamber 5, and 18 is the same screw. Motor for rotating the Konbeya,
Reference numeral 19 is a vertically movable gate plate for adjusting the opening area of the powder and granular material discharge port, 20 is a vertically movable operation handle of the gate plate, 21
Is a discharge chute of the powder drop port 14, 22 is a powder,
Reference numeral 23 denotes an annular outer wall ring that forms a space for containing the granular material.

In this embodiment, the powder particles 22 in the storage chamber 1 flow out from the powder particle discharge port 3 of the side wall 2 of the storage chamber 1 to the discharge chamber 5 by the powder pressure and the scraping blades 15. Powder discharge port 3
The powder or granules transferred from the to the discharge chamber 5 are dropped from the opened bottom surface 7 into the powder or granular material accommodating space 11 between the blades 9 of the powder or granular material supply plate 8 and supported by the bottom plate 10. The powder / granular material 22 filled in the powder / granular material accommodation space 11 is fed on the bottom plate 10 as the powder / granular material supply plate 8 rotates, and falls downward from the powder / granular material drop opening 14 of the discharge unit 13 on the opposite side, Is discharged. Here, the granular material 22 that has moved from the granular material discharge port 3 to the discharge chamber 5 changes in the degree of downward drop due to the granular material on the granular material supply plate 8 below. On the introduction side (the left side in FIG. 3) into which the empty granular material supply board 8 enters, the granular material from the granular material discharge port 3 falls smoothly. On the other hand, on the side where the granular material supply plate 8 exits from the discharge chamber 5 (on the right side in FIG. 3), the granular material accommodation space 11 is sufficiently filled with the granular material 22, and the lower edge of the side wall 6 and the top plate. The powder particles 22 of the powder particle discharge port 3 on this side are picked up at 12
Can not fall and stays. However, the powdery or granular material 22 retained in the discharge chamber 5 is forcibly sent to the introduction side by the screw conveyor 17 in the discharge chamber 5 and dropped on the introduction side. The screw conveyor 17 allows the powder / granular material 22 from the powder / granular material discharge port 3 to uniformly drop regardless of the rotation direction of the powder / granular material supply plate 8 and to be fed to the outside from the discharge part 13 for powder feeding.

[0009]

As described above, according to the present invention, the granular material is provided in the discharge chamber connected to the granular material discharge port at the lower part of the storage chamber in the direction opposite to the feeding direction of the lower granular material transfer path. Since the screw conveyor forcibly feeding was provided, the powder and granules could be uniformly and stably fed to the set amount from the powder and granule discharge port.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram showing a main part of the embodiment.

[Explanation of symbols]

 1 Storage Room 2 Side Wall 3 Powder Discharge Port 4 Stirring Blade 5 Discharge Chamber 6 Side Wall 7 Bottom Surface 8 Granule Supply Plate 9 Blade 10 Bottom Plate 11 Powder Storage Space 12 Top Plate 13 Discharge Port 14 Powder Discharge Port 15 Scraping blade 16 Drive part 17 Screw conveyor 18 Motor 19 Gate plate 20 Vertical movement operation handle 21 Discharge chute tube 22 Powder and granules 23 Road wall ring

Claims (2)

[Claims] 1. A discharge outlet having a bottom surface opened by opening a part of a lower side wall of the storage chamber containing the powder and granular material to form a powder and granular material discharge port. Provided on the outer side of the lower side wall, a powder / granular material transfer path for transferring the powder / granular material is provided immediately below the opening on the bottom surface of the discharge chamber, and the powder / granular material transfer direction of the powder / granular material transfer path is provided inside the discharge chamber. A powder feeding device characterized by being provided with a screw conveyor for forcibly feeding powder particles in a predetermined direction. 2. A powdery or granular material supply plate that rotates around the outer periphery of the lower part of the storage chamber immediately below the bottom surface of the discharge chamber, and the powdery or granular material that receives the powdery or granular material that falls from the bottom surface of the discharge chamber in the powdery particle chamber volume supply plate. The powdery or granular material transfer path is configured by providing a storage space, and providing a discharge part for discharging the powdery or granular material in the powdery or granular material storage space to the outside in the middle of the rotation trajectory between the powdery or granular material storage chambers. Powdering equipment.