JPS61273432A - Granular material cut-out device - Google Patents

Abstract

PURPOSE:To make it possible to continuously use a cut-out device in a long time period and to make it possible to uniformly cut out a granular material from the inside of a container, by forming several discharge ports arranged in a row at certain intervals in the lower section of a cut-out mechanism. CONSTITUTION:A glanular material in a container 1 is caused to flow toward discharge ports 2 due to the rotation of a screw conveyer 3. At this time, the granular material following down toward the discharge ports 2 is equally divided by partition plates 6 disposed in the container 1, and is then displaced in the transfer direction D by the propelling force of the screw conveyer 3. When the material reaches a block plate 9, it falls down to the discharge ports 2. During this cut-out process, the stream of the granular material may be fractioned due to the provision of the partition plates 6 in the container 1, and therefore, the granular material may be surely fed to the screw conveyer 3 without the affections of the shape of container 1 and the particle size distribu tion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a powder cutting device for supplying powder and granular material from a container to a subsequent line.

[Conventional technology]

Conventionally, various types of storage tank equipment for storing powder and granular materials, or vertical furnaces for filling powder and granular materials and carrying out operations such as classification, drying, heating, thermal decomposition, dry distillation, and combustion, have been installed from the lower part of the storage tank or furnace. A powder cutting device is installed to cut out the powder and granular material.

As this powder cutting device, Japanese Patent Application Laid-Open No. 53-52208
There is a cutting device for a shaft furnace described in the above publication.

As shown in FIG. 9, a screw conveyor 51 (single screw conveyor 51 if the container 50 has a ship bottom shape, and multiple screw conveyors 51 if the container 50 has a flat bottom shape) is arranged at the bottom of the container 50, and the screw conveyor 51 is placed at two positions in the axial direction. A discharge port 52 is provided at the end of the container 50, and the powder is transferred to the screw conveyor 51.
After cutting and transferring in one direction or both directions, the discharge port 52
The structure is such that it is discharged from

[Problem that the invention seeks to solve]

Such a powder cutting device operates under the pressure of the powder due to the filler, so it must have a structure that can sufficiently withstand external forces and has long-term durability. is necessary.

For this reason, the sliding friction resistance has been reduced by applying wear-resistant lining or hardfacing welding to the blade surface of the screw conveyor 51, or by lowering the rotational speed.

By the way, in cutting by the screw conveyor 51,
Changing the blade pitch and rotation speed of the screw conveyor 51,
By increasing the height of the body of the container 50, etc., the powder and granules are allowed to fall uniformly.

However, there is a problem that there is an upper limit to the rate of change of the blade pitch and the increase in the height of the body, which hinders uniform descent.

As described above, in the conventional structure, the profile of the container 50 itself,
This problem has been addressed through elemental design of the cutting device, but there are drawbacks in terms of uniform descent performance and durability.

An object of the present invention is to provide a powder cutting device that can be used continuously for a long period of time, and also enables uniform cutting of powder and granular material from inside a container.

[Means for solving problems]

The present invention provides a cutting device in which a cutting mechanism for discharging powder and granules to the outside is disposed at the lower end of a container for storing powder and granules,
A plurality of discharge ports are opened in a row at intervals in the lower part of the cut-out mechanism, and the cut-out mechanism is configured to discharge the powder and granular material in the container into the opening as a dispersed flow in the direction in which each opening is arranged,
The flow of powder and granular material inside the container is divided into smaller parts.

(Example〕 The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a schematic cross-sectional view showing an example in which a screw conveyor is arranged as a cutting mechanism, in which 1 is a container for storing powder and granules;
Reference numeral 2 denotes a plurality of discharge ports opened at a constant pitch in the lower part of the container 1.

This container 1 has a flat bottom shape as shown in FIG.
are also arranged in a plurality of rows in the width direction of the container 1, and screw conveyors 3 are provided equal to the number of two rows of discharge ports in the width direction.

The screw conveyor 3 is arranged in parallel so that its axis passes above each discharge port 2, and is provided with an electric motor 4 and a speed reducer 5 for rotational driving at its base end.

A partition plate 6 is arranged over the entire length of the lower width of the container 1, and divides the lower part of the container 1 into equal parts to the number of discharge ports 2 in the axial direction of the screw conveyor 3. Each partition plate 6 forms a vertical portion 7 and an inclined portion 8 that is inclined toward the direction in which the powder and granules are transferred by the screw conveyor 3, so that the powder and granules do not naturally fall directly into the discharge port 2.

Furthermore, 9 is a discharge port 2 corresponding to this from between each partition plate 6.
This is a blocking plate that prevents the powder and granular material from flowing out toward two adjacent discharge ports.

In addition, if the bottom of the container 1 is flat-bottomed, a plurality of screw conveyors 3 can be arranged, but in the case of a bottom-shaped container, one screw conveyor 3 is provided as shown in FIG. 3, and partition plates 6 are arranged in a row. It is configured to be attached corresponding to the discharge port 2.

In the above configuration, the powder and granular material in the container 1 tends to flow into the discharge port 2 one by one due to the rotation of the screw conveyor 3.

At this time, the powder and granules flowing down to each discharge port 2 are divided equally by the partition plate 6 arranged inside the container l, and are moved in the transfer direction by the thrust of the screw conveyor 3, and the closing plate 9
When it reaches this point, it falls into the discharge port 2 below.

In this cutting process, the partition plate 6 that equally divides the flow path of the powder and granules is placed inside the container 1, so the flow of the powder and granules can be divided into smaller parts, and is not affected by the shape of the container l and the particle size distribution. It is possible to feed up to 3 screw conveyors without any problems. Further, the transfer stroke of the powder or granular material by this screw conveyor 3 is the distance between each closing plate 9, and is therefore much shorter than that of the conventional one.

According to experiments, the operating conditions for the screw conveyor 3 were to reduce the number of revolutions by 1710 and the wear rate due to blade wear to 1/100 compared to when a model with the same specifications was arranged with a conventional structure. was completed.

As described above, the flow of powder and granular material in the container 1 can be divided into small pieces by the partition plates 6, and can be made uniform without being affected by the shape or particle size distribution of the container 1. There is no need to increase the height and rectify the flow.

Furthermore, since the load on the screw conveyor 3 and the transfer stroke can be reduced, the drive rotational speed can be lowered and the amount of rotation until discharge can be reduced. Therefore, the degree of damage to the blade surface of the screw conveyor 3 is reduced, and the life of the device can be increased.

FIG. 4 is a schematic diagram showing another embodiment, in which a plurality of discharge ports 2 are provided at a constant pitch like the previous embodiment, and a rotary valve 15 is arranged as a mechanism for cutting out the powder and granular material. It is.

The rotary valve 15 has a long shape and is rotated in a fixed direction by an electric motor 8116 and a speed reducer 17 to cut out a fixed amount of powder. This rotary valve 15 has a cutout space 18 in a portion corresponding to each discharge port 2, and a dividing wall 19 is formed between each discharge port 2 to quantitatively divide and discharge the granular material from the container 1.

In this configuration, since the rotary valve 15 itself has a function of preventing the powder from falling naturally, there is no need to provide the partition wall 6 as described above if there is no risk of the powder falling naturally.

In this way, the inside of the rotary valve 15 is divided equally by the dividing wall 19, so that when the rotary valve 15 rotates, the container 1
The flow of the powder or granular material inside can be divided into smaller pieces, and the powder or granular material can be equally cut out in the same way as in the embodiment described above.

Furthermore, FIG. 6 is a schematic diagram showing an example of arranging the scraper conveyor 20 as a cutting mechanism, and FIG. 7 is a sectional view taken along the line ■-■ in FIG. Scraper conveyor 2 on sprocket wheel 21
0 is wound around the container 1, and partition plates 6 corresponding to the plurality of discharge ports 2 are provided inside the container 1.

This scraper conveyor 20 is suitable for the case where the powder or granules are relatively fine particles, and similarly to the first embodiment, the powder or granules in the container 1 are divided into small pieces by the partition WL6, and the flow is cut out evenly. Can be done.

Incidentally, if the container 1 is in the shape of a ship's bottom, the width of the scraper conveyor 20 may be configured to be small as shown in FIG.

〔Effect of the invention〕

The powder cutting device according to the present invention has the following effects depending on its configuration.

- By dividing the flow of powder and granular material in a container, the powder and granular material can be lowered uniformly without being affected by the shape or particle size distribution of the container.

(2) The above (2) allows the internal volume of the container to be used effectively without wasting it, and in particular, in vertical furnaces, various operations within the furnace can be performed under extremely stable conditions.

■ Since the load of powder and granular material applied to the cutting device can be distributed, there is no need to repair, modify, or replace consumable parts during operation, and the need for anti-wear measures can also be reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of a cutting device according to the present invention, and FIG. 2 is a diagram similar to that of FIG. 1. - A cross-sectional view taken along the line arrow 1,
Fig. 3 is a sectional view taken along the line 1-1 in the case of a ship-bottom-shaped container, Fig. 4 is a schematic diagram of the second embodiment, and Fig. 5 is a schematic diagram of the second embodiment.
6 is a schematic diagram of the third embodiment, FIG. 7 is a sectional view taken along the line ■-■ in FIG. 6, and FIG. 8 is a sectional view of the bottom-shaped container FIG. 9 is a sectional view taken along the line 1-1 in the case of the present invention, and FIG. 9 is a sectional view showing a conventional example. +11 container (2) Discharge port (3) Screw conveyor (cutting mechanism) (4) Electric motor (5) Reducer (6) Partition plate (7) Vertical part (8) Inclined part (9) Closing plate (15) Rotary valve (Cutting mechanism) (16) Electric motor (17) Reducer (18) Cutting space (19) Dividing wall (205 scraper conveyor (cutting mechanism) (21) Sprocket wheel

Claims (1)

[Claims] 1. A cut-out mechanism for discharging the powder and granules to the outside is arranged at the bottom of a container for storing powder and granules, and a plurality of discharge ports are opened in a row at intervals at the bottom of the cut-out mechanism. A device for cutting out powder or granular material, wherein the cutting mechanism is configured to discharge the powder or granular material in the container into the respective openings as a dispersed flow in the direction in which the respective openings are arranged.