JPH0777926B2 - Method and apparatus for sending powder or granular material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to fly ash from ships, freight cars, trucks, and the like.
The present invention relates to a method and an apparatus for feeding powder or granular material that can be used for unloading earth and sand.

[Prior Art] Conventionally, when a cargo such as fly ash or earth and sand loaded on a ship is carried to a predetermined location, after adding a large amount of water to the cargo, a sand pump may be used to pump the cargo to the predetermined location. Alternatively, a method of directly picking up a conveyed item with a grab bucket and loading the conveyed item on a truck or a belt conveyor to convey it to a predetermined place has been adopted.

[Problems to be Solved by the Invention] However, the former method has a drawback that a large amount of water is required, and spillage treatment is required.
On the other hand, the method of loading on a truck etc. with a grab bucket is
Dust tends to stand up when stacking. Further, in the case of using a belt conveyor, since its machine length is invariable, the number of places to be thrown out is limited, and it is not possible to throw to any place in a wide range.

[Means for Solving the Problems] In the method for delivering powder or granular material according to the first aspect of the present invention, first, water is added to a powdery or granular material to form a high-concentration mud, and the mud is obtained. Is stirred and lifted with a vertical screw conveyor. Then, a method of sending powder or powdery granules for sending the lifted mud in a pipe, wherein the vertical screw conveyor is
With a screw inside the cylinder that extends in the vertical direction,
An agitating member is provided at a lower portion of the vertical screw conveyor, the agitating member protruding laterally from the outer peripheral surface of the cylindrical body, and rotated by a drive device around the axis of the vertical screw conveyor. The agitating member is rotated. Thus, the powdery or powdery substance was mixed with water and stirred to form the high-concentration mud.

Further, the powder or powdery granular material sending device of the second invention is a device for carrying out the method of the first invention, and is provided on the vertical screw conveyor and at the tip end side of this vertical screw conveyor. The stirring device, and a water supply pipe for supplying water into the powdery or granular material around the vertical screw conveyor,
A powder or powdery granular material feeder having a pipe connected to a discharge port of the vertical screw conveyor, wherein the vertical screw conveyor includes a screw in a cylinder extending in a vertical direction, An agitating member is provided at a lower portion of the vertical screw conveyor so as to project laterally from the outer peripheral surface of the cylindrical body and is rotated around a shaft center of the vertical screw conveyor by a driving device.

In the second invention, an ejector may be provided in this pipe.

[Operation] In the present invention, since the water from the nozzle is only poured until the powdery or powdery substance becomes a high-concentration mud, the amount of water need not be so large, and therefore, No need for water treatment. Further, it is not necessary to re-load the powdery or powdery substance loaded on a ship or the like. By stirring the powdery or powdery substance with the stirring member, the powdery or powdery substance can be efficiently made into a high-concentration mud.
This high-concentration mud is agitated and lifted by a vertical screw conveyor as it is, and is discharged to a predetermined location through a pipe, so there is no dust and it is easy to select the ejection point. is there.

If an ejector is provided, the high-concentration mud can be continuously and smoothly sent.

[Examples] Hereinafter, the present invention will be described in detail with reference to the examples shown in the drawings.

FIG. 1 is a schematic configuration diagram showing an embodiment of a powder or powdery granular material delivery apparatus according to the present invention. FIG. 2 is an enlarged cross-sectional view of the main part,
FIG. 3 is a plan view of the bar screen.

The vertical screw conveyor 1 is configured to include a cylindrical tubular body 2 and a screw 2A that is rotatably housed in the tubular body 2, and the screw 2A transports the cargo 4 inside the hull 3 by the screw 2A. (Dry state or fly ash in a state containing a little water, earth and sand, etc.) can be unloaded. The screw 2A is connected to a motor 5 arranged on the upper end side of the tubular body 2 and is configured to be rotationally driven by the motor 5. Further, an inlet device 6 is provided on the front end side of the vertical screw conveyor 1 for stirring the transported object 4 and scraping the transported object 4 into the vertical screw conveyor 1. The inlet device 6 is a cylindrical body 7 attached to the tip of the vertical screw conveyor 1 coaxially with the vertical screw conveyor 1 and rotatable about an axis.
And a tapered canopy member 7a fixed to the lower end of the cylindrical body 7.
And an inner blade 7b and an outer blade 7c for digging in a conveyed object suspended from the canopy member 7a, and a bar formed in a substantially triangular ring and arranged in multiple stages (three stages in this embodiment) vertically. A screen 9 (a plan view of which is shown in FIG. 3) is provided. The bar screen 9 is for each blade
It is fixed to 7b and 7c by welding or the like.

The tubular body 7 can be rotationally driven by a drive device 7A provided at a middle height portion of the screw conveyor 1, and by rotating the tubular body 7, each blade 7a is passed through the canopy member 7a. , 7c and the bar screen 9 rotate integrally. The tip of the screen 9 is a rake portion 9a, and when the screen is rotated, the transported material around it is crushed and agitated. Then, it is taken in through the opening 8 at the tip of the tubular body 2 by the blades 7b and 7c. In addition, screen 9
Prevents large rocks and foreign matter from being taken into the screw conveyor 1.

The lower ends of these blades 7b, 7c are fixed to the block 7d,
The block 7d is engaged with the tip of the screw shaft 2A via a bearing 7e. Bearings are also provided between the cylinder 2 and the block 7d and between the tip of the cylinder 2 and the screw shaft 2A.
7f and 7g are installed.

A nozzle 10 is provided around the vertical screw conveyor 1. The nozzle 10 has its upper end fixed to the tubular body 7, and its tip extends downward toward the hull 3 side.
Water can be jetted and added to the goods 4 in the hull 3.

Further, a discharge pipe 12 is connected to the discharge port 11 of the vertical screw conveyor 1, and a front end opening portion of the discharge pipe 12 faces a predetermined dropping place (not shown). Further, an ejector 14 connected to a compressor (not shown) is attached between the discharge pipe 12 and the discharge port 11, and the ejector 14 is connected to the inside of the discharge pipe 12 via the ejector 14. It is designed to deliver compressed air 15.

The vicinity of the upper end of the cylindrical body 2 of the vertical screw conveyor 1 is connected to the arms 16a of the crane vehicle 16 and the tip ends of the cylinders 16b. The crane vehicle 16 allows the vertical screw conveyor 1 to move up and down and tilt. It has a flexible structure.

Next, the operation will be described. First, after the hull 3 loaded with the goods 4 berths, the arm 16a of the crane vehicle 16
The vertical screw conveyor 1 is lowered via the and the inlet device 6 is thrust into the transported object 4. After this, water is poured from the nozzle 10 into the conveyed article 4 and the inlet device 6 is driven to rotate. Then, the transported material 4 is made into a high-concentration mud, and the transported material 4 in the mud is taken into the screw conveyor 1. The goods 4 are vertically conveyed in the cylindrical body 2 of the vertical screw conveyor 1, and are conveyed to a predetermined dropping place through the discharge pipe 12. At this time, in the discharge pipe 12,
Since the compressed air 15 is introduced from the ejector 14, the article 4 is smoothly and forcibly conveyed in the discharge pipe 12 in a so-called plug flow state.

Although an inlet device having a stirring and scraping function is adopted in the above-mentioned embodiment, a stirring device having only a stirring function may be adopted in the present invention.

In the embodiment, the water supply pipe is provided as a nozzle for water injection directly fixed around the vertical screw conveyor, but this is different from the vertical screw conveyor for water and the supply hose. It can also be pulled out and used.

[Effect] As described above, according to the present invention, it is possible to efficiently feed powder or powder particles as a high-concentration mud. Since this mud has a high concentration, no sewage treatment is required. Moreover, since the transported goods are directly transported from a ship or the like to a predetermined place and do not need to be reloaded on the way, dust does not stand. Furthermore, since the transfer is done by piping, it is easier to select and move the ejection point compared to the case of using a belt conveyor. In addition, if compressed air is sent into the discharge pipe by an ejector, it is possible to smoothly and easily convey a conveyed object to a long distance.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a powder or powdery granular material delivery apparatus according to the present invention, and FIG. 2 is an enlarged sectional view of an essential part.
FIG. 3 is a plan view of the bar screen. 1 ... Vertical screw conveyor, 4 ... Transported goods, 6 ... Inlet device, 10 ... Nozzle, 11 ... Discharge port, 12 ... Discharge pipe, 14 ... Ejector, 52 ... Compressed air.

Continuation of front page (56) Reference JP-A-57-29798 (JP, A) JP-A-53-87480 (JP, A) JP-A-53-87479 (JP, A)

Claims (3)

[Claims] 1. A high-concentration mud-like material obtained by adding water to a powdery or powdery substance, stirring and lifting the mud-like material with a vertical screw conveyor, and then continuously sending it through a pipe. The vertical screw conveyor is provided with a screw in a cylinder extending in the vertical direction, and the outer peripheral surface of the cylinder is provided at the bottom of the vertical screw conveyor. Is provided with a stirring member that protrudes more to the side than that of the vertical screw conveyor and is rotated by a drive device about the axis of the vertical screw conveyor. By rotating the stirring member, the powdery or powdery substance is mixed with water. A method for feeding powder or granular material, which comprises mixing and stirring to form the high-concentration mud. 2. A vertical screw conveyor, a stirrer provided on the tip side of the vertical screw conveyor, and water for supplying water into the powdery or granular material around the vertical screw conveyor. What is claimed is: 1. A powder or granular material transport device comprising a supply pipe and a pipe connected to a discharge port of the vertical screw conveyor, wherein the vertical screw conveyor has a screw in a cylinder extending in a vertical direction. And a stirring member that protrudes laterally from the outer peripheral surface of the cylindrical body at the lower portion of the vertical screw conveyor and is rotated around the axis of the vertical screw conveyor by a drive device. A powder or granular material delivery device. 3. The powder or powdery granular material sending device according to claim 2, wherein an ejector for continuously sending compressed air is attached to the pipe.