JPS61287626A - Discharge device for powdery granule - Google Patents

Abstract

PURPOSE:To eliminate a bridge or rat hole phenomenon in an easy manner, by installing a spiral plate in an inner surface of the lower hopper fitly installed in a lower part of a hopper body, making it rotable, while installing each spiral plate of the specified width in an inner circumferential surface of a discharge port at more than a fixed pitch. CONSTITUTION:Powdery granules projected out of a top part of a hopper body 1 drop in a lower hopper 2, reaching to a discharge port 2a, and since each plate 11 of more than half of a diameter of an opening part in width is installed in spiral form at more than one pitch, the plate 11 serves as a gate whereby these powdery granules are not naturally discharged, and they are accumulated in the hopper. When these granules are discharged out, a motor 9 is started, and when the lower hopper 2 is rotated, these powdery granules are extruded downward by a screw conveyor function of a spiral plate 10, and simultaneously powdery granules inside the discharge port 2a also are discharged out by action of the spiral plate 11, and while rotation of the lower hopper 2 is continues, this discharge operation takes place in succession. In addition, a baffle plate 12 is installed in an inner circumferential surface of a lower end of the body 1 so that these powdery granules smoothly flow in succession, thus a bridge or rat hole phenomenon is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to an apparatus for discharging powder and granular material stored in a hopper.

[Prior art] In a device that stores powder and granular material in a cylindrical hopper body and discharges it from the bottom end, the bottom end of the hopper is equipped with rotary pulp, a horizontal screw conveyor, a vibrating conveyor,
A discharge device such as a belt conveyor is attached, and the powder and granules are supplied to these discharge devices by their own weight and are discharged. However, these discharge devices are expensive and are therefore small devices with feed ports that are small in size compared to the cross-sectional dimensions of the hopper. Therefore, the hopper has no choice but to reduce its lower cross-sectional dimension, and the lower part of the hopper becomes conical. In this case, if the angle of inclination of the conical portion is small, a phenomenon in which the powder particles become clogged, that is, a bridging phenomenon or a rathole phenomenon occurs. To counter this, it was necessary to install a vibrator on the side of the hopper to prevent bridging through vibration, or install an air nozzle inside the hopper to blow high-pressure air to prevent bridging, in addition to the discharge device. .

[Purpose of the Invention] Therefore, an object of the present invention is to provide a powder discharge device that can eliminate the above-mentioned disadvantages of the prior art and easily eliminate the bridging phenomenon and rathole phenomenon.

[Structure of the Invention] A powder discharge device according to the present invention includes a cylindrical fixed hopper body for storing powder and a lower part fitted with a gap below the hopper body and rotatably supported by rollers. It is equipped with a hopper and a drive device that rotates the lower hopper, and a spiral plate is provided on the inner peripheral surface of the conical part of the lower hopper, and a spiral plate is provided on the inner peripheral surface of the cylindrical discharge port following the conical part. A plate with a width of more than half the diameter is spirally arranged at one or more pitches.

[Operations and Effects of the Invention] As described above, the present invention is divided into a hopper main body in which a powder or granular material hopper is fixed, and a lower hopper fitted in the lower part of this hopper main body, and the lower hopper is made rotatable. , because a spiral plate was installed on the inner surface of the lower hopper,
The powder and granules are forcibly discharged by the screw conveyor function of this spiral plate. In addition, on the inner circumferential surface of the cylindrical discharge port, plates with a width of more than half the diameter of the discharge port are spirally arranged at one pitch or more, so the powder and granules do not fall by themselves and can be carried through the lower hopper. Since it is only discharged while it is rotating,
It is also easy to control emissions.

Further, since the inner wall at the lower end of the hopper main body is provided with a baffle plate that protrudes toward the lower hopper side, the powder and granules can be smoothly discharged without causing shearing.

[Example] Embodiments of the present invention will be described below based on the drawings.

In the figure, a hopper main body 1 is fixed on an appropriate fixing means (not shown), the lower end thereof is open downward, and a baffle plate 12 is attached inside. A lower hopper 2 is disposed below this hopper body 1, and the upper end of this lower hopper 2 has an inner diameter larger than the outer diameter of the hopper body 1, and there is a certain gap 21 between the two.
A cover 2 is fitted with a
2 is attached to the lower part of the hopper body 1. An appropriate support flange 23 having an L-shaped cross section or the like is fixed to the upper outer periphery of the lower hopper 2, and a guide rail 24 having a U-shaped cross section is attached to the lower surface of the support flange 23.

On the other hand, a thrust roller 3 and an upper radial roller 4 are rotatably provided on the top of a base 20 arranged below the hopper, and these rollers are engaged with a guide rail 24 to freely rotate the lower hopper 2. is supported by The inner diameter of the lower hopper 2 has a tapered conical shape so that it decreases as it goes downwards, and the discharge port 2 is located at the lower end.
A is opened downward with a diameter dimension.

An annular guide rail 26 is attached to the outer periphery of the discharge port of the lower hopper 2 via seven flange 25, and a sprocket wheel 6 is fixed to the lower surface of this guide rail 26. Then, facing this guide rail 26,
There are several lower radial rows 55, hopper 2
It supports the lower part of the machine so that it rotates without eccentricity.

A chain 7 is engaged with this sprocket wheel 6, and the lower hopper 2 is rotated by driving this chain 7 with a sprocket gear 8 of a motor 9. A plate 10 is spirally attached to the inner wall surface of the lower hopper 2. This spiral plate 10 is used to push surrounding powder and granules downward using the principle of a screw conveyor when the lower hopper 2 rotates. Set the thickness etc. Lower end outlet 2
Although a is formed in a cylindrical shape, a spiral plate 11 is similarly provided inside the discharge port 2a.

The width of this plate 11 is more than half the inner diameter of the discharge port 2a, and the plate is attached in a spiral shape with at least one pitch. The apparatus of this embodiment is constructed as described above, and the operation of the apparatus will be explained below.

The powder and granular material introduced from the top of the hopper body 1 flows down the lower hopper 2 and reaches the discharge port 2a.

Although the discharge port 2a is not provided with a gate that covers the entire opening, it is provided with a plate 11 whose width is more than half the diameter of the opening in a spiral shape of one pitch or more, so this plate 11 functions as a gate. The powder and granules are not naturally excreted. Therefore, the powder and granules that are introduced are accumulated in the hopper. When discharging the powder inside the hopper, the motor 9 is started and the lower hopper 2 is rotated via the chain 7.

Due to this rotation, the powder and granules in the lower hopper 2 are transferred to the spiral plate 1.
It is pushed downward by the screw conveyor function of 0.

At the same time, the powder in the discharge port 2a is also discharged by the action of the spiral plate 11. The granular material is continuously discharged while the lower hopper 2 continues to rotate.

When the motor 9 is stopped and the rotation of the lower hopper 2 is stopped, the discharge of the powder and granular material is also stopped. At this time, since the hopper main body 1 does not rotate, the powder and granular material inside also does not rotate. Therefore, in order to prevent the powder from being sheared between the bottom surface of the hopper body 1 and the top surface of the lower hopper 2 and not being discharged, a A protruding baffle plate 12 is provided. Therefore, the powder can flow smoothly from the upper hopper to the lower part, which is particularly effective for sticky powder.

[Summary] As described above, the present invention separates the lower part of the powder storage hopper from the main body, attaches a plate inside it in a spiral shape, and further spirally installs a plate at the lowest part to prevent the powder and granule from being naturally discharged. By installing one pitch at a time, we were able to provide both functions with one device, whereas conventionally it was necessary to attach an ejection device and a device to prevent scratches and rat holes at the same time. Also, by arranging the plate spirally inside the lower hopper, the feeding action can be performed within the hopper in the same way as the feeding principle of a screw conveyor, so the slope of the conical part at the bottom of the hopper can be made small. In other words, the height of the entire hopper can now be kept low.

[Brief explanation of the drawing]

The drawing is a cross-sectional side view showing an embodiment of the present invention. 1... Hopper body 2... Lower hopper 2
a...Discharge port 3...Thrust roller 4.5
...Radial roller 6...Sprocket wheel 7...Chain 8...Sub Oket 9.
...Motor 10.11...Spiral plate 12...Baffle plate 20...Base 21...Gap 22...Cover 23.25...Flange 24.26...
・Circular member

Claims (2)

[Claims] (1) A cylindrical fixed hopper body for storing powder and granular materials,
The lower hopper is fitted with a gap below the hopper body and is rotatably supported by rollers, and a drive device that rotates the lower hopper. , and the inner peripheral surface of the cylindrical discharge port following the conical part is provided with plates having a width of at least half the diameter of the discharge port in a spiral pattern at one or more pitches. Ejection device. (2) A powder discharge device according to claim 1, wherein a baffle plate projecting toward the lower hopper is attached to the inside of the fixed upper hopper body.