JPS6216914A - Transfer method for powdery granule by exclusive transporting device - Google Patents

Abstract

PURPOSE:To prevent powdery granules from being polluted as well as to aim at improvement in durability and the shortening of transfer time, by using each conveying force of both horizontal and vertical screw conveyors together with another conveying force of compressed air to be fed to each inlet side of both these conveyors in combination, in case of the above-captioned device mounted on a car. CONSTITUTION:A horizontal screw conveyor 3 and a vertical screw conveyor 4 are driven while compressed air is fed out of the nozzle 7a installed in an end part at the opposite side to the side of a connecting part casing 5 of the horizontal screw conveyor 3. With this constitution, powdery granules inside a storage tank 2 are conveyed by these screw conveyors, while they are conveyed by pressure-feed power by means of the compressed air. Therefore, the inside of a device is cleaned up by the compressed, air, leaving no residue, thus pollution is preventable. And, even in case of multiple component blending, they are conveyable without separation and, what is more, an increase in useful life and the shortening of transfer time are both promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This device 811 comprises a storage tank for powder and granules, a transversely split screw conveyor provided at the bottom of the storage tank, and a vertical screw conveyor that communicates with the outlet of the horizontal screw conveyor. In a method for transporting powder using a powder transport device equipped on a transportation vehicle such as a car, the pressure at the inlets of both screw conveyors is increased by injecting compressed air pressure. A powder transport device that operates a one-car screw conveyor at a higher pressure than the pressure, and uses the compressed air pressure and the screw conveyor at the same time to separate or transfer different powder and granular materials without causing contamination. The present invention relates to a method for transporting powder and granular materials.

Furthermore, if necessary, the pressure can be maintained for a predetermined period of time even after the operation of both screw conveyors has ended.

Conventional technology Powder transport equipment that is mounted on a transportation vehicle such as a car to transport feed and other powder and granular materials generally has a storage tank for the powder and granular material mounted on the transportation vehicle, and a storage tank for the powder and granular material is mounted on the transportation vehicle. is equipped with a horizontal screw conveyor.

Further, a vertical screw conveyor is installed at the rear of the storage tank, and both screw conveyors are connected by a connecting casing.

In this case, if the storage facility at the shipping destination is high, it is desirable to be able to fold the upper half of the vertical screw conveyor and store it in the upper part of the storage tank.

In this powder transport device, the powder is transported by aligning the outlet of the upper half of the vertical screw conveyor with the entrance of the storage facility at the shipping destination and then operating both conveyors.

However, when transporting powder and granules for screw conveyors and conveyors, powder and granules may remain in areas where screws are not provided, such as in the gap between the casing of the screw conveyor and the screw, or in the connecting casing. Therefore, when transferring different types of powder and granules, the remaining powder and granules can cause contamination (
The disadvantage was that it caused pollution.

In addition, in order to eliminate the drawbacks of the conventional method, a method has been developed in which cleaning pieces such as rubber are attached to the outer periphery of the screw conveyor to remove residual powder. Since the casing is bent by the pressure of the granules and the rubber is constantly in contact with the inner periphery of the casing, its service life is short and it becomes unusable within a short period of time.

Furthermore, the use of air pressure to transfer such powder and granular materials has also been developed.

In this case, since there is no complicated structural part such as a screw conveyor, cleaning is easy and it is conveniently used for transporting powder and granular materials of a single component.

However, in the case of powder or granules such as feed, which is a mixture of various ingredients, the transport force of air pressure varies depending on the specific gravity of the ingredients, so the uniformly blended granules may separate due to the difference in specific gravity after being transferred. There were drawbacks that negatively affected quality.

Means for Solving the Problems This invention consists of a powder storage tank, a horizontal screw conveyor provided at the bottom of the storage tank, and a vertical screw conveyor attached to the outlet of the horizontal screw conveyor via a connecting casing. In a method of transporting powder using a powder transport device equipped with a screw conveyor and mounted on a transportation vehicle such as an automobile, the pressure at the inlets of both screw conveyors is reduced to 1 by the injection of compressed air pressure. By increasing the height of the powder and granular materials by operating both screw conveyors and simultaneously using the transporting force of the compressed air pressure and the screw conveyor to transport the powder and granular materials, it is possible to This method eliminates the drawbacks of the transfer method.

According to this invention, most of the powder and granules are transferred by the screw conveyor, so even if the powder and granules are mixed with Kameda ingredients, the components do not separate, and the inlet and outlet of both screw conveyors are Since there is a pressure difference between them, the powder and granules between the screw conveyor and the casing are not transferred by air pressure, and no powder remains, so cleaning inside the device is also omitted. It is possible to handle different types of powder and granules without causing separation or contamination, and the amount of air required is significantly lower than when only compressed air is used. Furthermore, due to the pressure difference, the transfer time can be shortened compared to when a screw conveyor is operated alone. Furthermore, since there are no parts that wear out, the service life of the device parts is greatly extended, which is extremely useful.

Example The invention will now be explained with reference to the drawings.

FIG. 1 is a front side view illustrating an embodiment of a powder transport device used in the powder transport method according to the present invention, and FIG. 1 is a cross-sectional view taken along the line I-I in FIG. Figures 3 and 3 are side views of a powder and granular transport device according to another embodiment, and the reference figures are Figures J and I.
A tI line sectional view is shown.

In the drawing, a storage tank (2) for powder and granular material is mounted on a transport vehicle (1) such as a car, and a horizontal screw conveyor (32) is attached to the bottom of the storage tank (2).
A part of it is shown in cross section. ) Also, a vertical screw conveyor (4) is installed at the rear of the storage tank (2). (Part of it is shown in cross section.) Both screw conveyors (#31) (Only the external appearance is shown.) (Only the external appearance is shown.) (6) shows the storage facility at the shipping destination and its height is high.In this way, the storage facility at the shipping destination (For those with a high 61, the vertical screw conveyor (the upper half of 41 (see a) is folded up and the storage tank
2) It is desirable to be able to store it in the upper part.

In the powder transport device shown in this example, a vertical screw conveyor ((transfer)
After aligning the outlet of the upper half (67), the powder and granules are transported by operating both screw conveyors.

When transferring powder or granular material under such conditions, powder or granular material may remain in the gap between the casing of the screw conveyor and the screw or in areas without screws such as the connecting casing, which cannot be easily cleaned. Therefore, when transferring powders and granules of different types S, there was a drawback that this remaining powder and granules caused contamination CM.In addition, in order to eliminate this drawback, conventional methods It has been developed to attach rubber, etc. to the outer periphery of the screw to prevent powder particles from remaining, but during transportation, the rubber, etc. is constantly bent by the pressure of the powder particles, etc. □ Since it comes into contact with the inner station of the casing, its service life is short and it becomes unusable in a short period of time, which is a drawback.

Furthermore, in the past, pneumatic pressure was often used to transfer powder and granules, and since there were no complicated structural parts such as screw conveyors, cleaning was easy, and single-component powders were It is conveniently used for transporting bodies.However,
When producing powder and granules containing various ingredients, such as feed, the transfer force of air pressure varies depending on the specific gravity of the ingredients.
There is a drawback that, after being uniformly blended and transported, the powder and granules are separated by layers of their specific gravity, which adversely affects their quality.

In contrast, the present invention comprises a powder storage tank (21), a horizontal screw conveyor installed at the bottom of the storage tank (21), and a subsequent screw conveyor attached to the outlet of the storage tank (21) via a connecting casing. A powder transport device mounted on a transportation vehicle such as a car is used, and compressed air pressure is introduced into this device to make the pressure at the inlet of both screw conveyors higher than the pressure at the outlet. At the same time, by operating both screw conveyors and, if necessary, maintaining the air pressure for a predetermined period of time even after both screw conveyors have finished operating, the transport force of pneumatic pressure and the transport force of the screw conveyor can be simultaneously achieved. It can be used to transport powder and granular materials.

According to this invention, most of the powder and granules are transported by the screw conveyor, so even if the powder and granules are mixed with multiple components, the components do not separate, and the inlet and outlet of both screw conveyors are Since there is a pressure difference between the screw conveyor and the casing, the powder and granules are transferred by air pressure, so no powder remains.
Therefore, cleaning inside the device can be omitted, and there is no fear of separation or contamination even when handling different types of powder or granules.

Furthermore, compared to the case where only air pressure is used for pressure feeding, the required air amount and air pressure are extremely small, and since there is a pressure difference, the transfer time can also be shortened compared to the case where the screw conveyor is operated alone.

Also, in this invention, there are no parts that wear out, so the service life of the device parts is also significantly extended.

In order to create a pneumatic pressure layer between the inlet and the outlet in this invention, in the embodiment shown in FIG. In the embodiment shown in FIG. 3, a pneumatic injection nozzle (76) is provided in the upper part of the storage tank (2) in place of this nozzle (7α).

These Knots A/(7g) and 1i(7j) are connected to a compressed air source (not shown) such as a blower, co/Grötzner, etc. by piping (not shown).

The powder and granular material is transferred by appropriately operating the drive device for this compressed air pressure source, the valves, etc., and the drive devices for both screw conveyors.

Effects of the Invention The present invention uses a powder transport device mounted on a transportation vehicle such as an automobile to transport powder and granules by appropriately utilizing the transport force of pneumatic pressure and the transport force of a screw conveyor. This provides the following extremely excellent effects.

(l) Cleaning of the powder transport device is extremely easy, and there is no risk of contamination even when handling different types of powder.

(2) Even in granular materials containing multiple components, there is a risk that the components will separate.

(3) The service life of the device parts is extended.

(41, Transfer time can be shortened.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view taken along the line I--I in FIG. 1, and FIG. , FIG. 3 is a side view with main parts cut away of another embodiment, and FIG. 3 is a sectional view taken along the line II--II of FIG. J. In the drawings, the same reference numerals indicate the same or equivalent parts. In the drawings, (IJ is a transport vehicle, (2) is a storage tank for powder and granules, (3) is a structural screw conveyor, (41 is a vertical screw conveyor, and (4'a) is a vertical screw conveyor (4). In the upper half, (51 is the connecting casing, (6) is the storage equipment, (7a) and (7b) are the pneumatic injection nozzles, respectively. Inventor: Masa Hori
Tree Patent Applicant: Seiko Giken Co., Ltd. 1;",,,:'l"j Figure 2

Claims (4)

[Claims] (1) It has a powder storage tank, a horizontal screw conveyor provided at the bottom of the storage tank, and a vertical screw conveyor that communicates with the horizontal screw conveyor, and is mounted on a transportation vehicle such as a car. In this method, the pressure at the inlet portions of both screw conveyors is made higher than the pressure at the outlet portions of both screw conveyors by injecting compressed air pressure, and both screw conveyors are operated. A method for transferring powder and granular materials using a powder and granular material transport device, characterized in that the compressed air pressure and the screw conveyor are used simultaneously to separate different powder and granular materials or to transfer them without causing contamination. . (2) After the operation of both screw conveyors is finished, the pressure is maintained for a predetermined period of time, and the air pressure and the screw conveyor are used simultaneously to separate or transfer different powders and granules without causing contamination. A method for transporting powder or granular material using the powder or granular material transporting device according to claim 1. (3) Pressurized air is injected by a nozzle connected to a compressed air source near the end opposite to the connecting end with the vertical screw conveyor that communicates with the horizontal screw conveyor. A method for transporting powder and granular materials using a powder and granular material transport device. (4) A method for transporting powder or granular material using the powder or granular material transporting device according to claim 1, wherein compressed air pressure is introduced into the upper part of the storage tank by a nozzle connected to a compressed air source.