JPH06312819A - Powder deposit scraping and eliminating device for flow conveyor - Google Patents

Abstract

PURPOSE:To scrape the powder material adhered to the bottom of a casing or the like and prevent the happening of impossibility of chain traveling by fitting plural claw-type scraping and eliminating devices, which is formed by cutting a round steel obliquely, to scraping plates of a flow conveyor. CONSTITUTION:A flow conveyor carries the powder 8 to be carried, scraping the powder 8 to be carried, which is placed on the central surface and the bottom surface of a trough having a rectangular cross section, with scraping plates 9 fitted to a carrying chain 7 arranged in the lower side. The upper half of the trough is formed into a zone for passing the returning chain 6 similarly with the conventional structure. This scraping plate 9 is provided with a scraping and eliminating device 10. The scraping and eliminating device 10 has a small contact area so as to bite the power 8 to be carried, scrape it and carry it, and the device 10 is made of hard material and of which tip is sharpened to facilitate the bite. For example, round steel or WC-Co superhard material especially having the excellent abrasion resistance and a high degree of hardness and Al2O3, Cr2O3, lA2O3.Cr2O3 solid solution is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for scraping and removing powder deposits on a flow conveyor used for powder transportation.

[0002]

2. Description of the Related Art Flow conveyors are often used as means for transporting coal, iron ore and the like in steelworks and the like. During the use of such a flow conveyor, the material to be carried adheres to the belt, and if it is left unattended, it will hinder the transportation.
Adhesion is being removed. FIG. 7 is a cross-sectional view showing a conventional scratch plate device for a flow conveyor. As shown in FIG. 7, the flow conveyor sends the powder powder 8 placed on the central and bottom surfaces of the trough having a rectangular cross section while scraping it with the scraping plate 9 attached to the transport chain 7, which is the lower chain. Also,
The upper half of the trough is a zone through which the return chain 6 passes. That is, the lower half chamber is the transfer zone.

[0003]

However, in the conventional device for scraping and removing the powder adhered substances on the flow conveyor, when the powder has moisture and the temperature is higher than the atmospheric temperature, the outer surface of the trough casing is exposed to the atmospheric temperature. The casing iron shell cools below the internal powder temperature, the water content of the casing and the vapor in the trough condenses on the inside surface of the iron shell, and the powder begins to adhere. Space is getting smaller,
The load on the motor becomes large, and the problem of uncarrying such as overload stop often occurs. Further, the adhering matter absorbs water and is constantly pressed against the iron skin by the scraping plate, and becomes a hard plate-like state which cannot be easily removed. Moreover, a problem occurs especially when the powder retains water at a temperature higher than room temperature.

The present invention has been made in view of the above circumstances, and an object thereof is to solve the problems of the prior art and to scrape off powder adhering to the bottom and left and right walls of a casing to remove adhering powder. An object of the present invention is to provide a device for scraping and removing powder deposits on a flow conveyor that prevents the chain from being unable to run due to growth.

[0005]

In order to achieve the above-mentioned object, the apparatus for scraping and removing powder deposits according to the present invention has the following construction. That is, the gist of the present invention is that in a device for scraping and removing powder deposits on a flow conveyor used for powder transportation, a scraper of a flow conveyor has a nail-shaped scraper obtained by obliquely cutting round steel or the like. Powder on a flow conveyor characterized by comprising a plurality of removing devices, scraping off the powder adhering to the bottom and left and right walls of the casing, and preventing the chain from being unable to run due to the growth of adhering material. It is in the device for scraping off adhered substances.

[0006]

The present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory diagram showing an example of a coke manufacturing process using a flow conveyor. As shown in FIG. 1, it is a flow conveyor used as a conveying means of pulverized coal especially in the coke manufacturing process, in which the raw coal is discharged from the lower part of the coal dryer 3 and the coarse coal is discharged from the upper part of the coal dryer 3. The discharged powder is collected by the dust collector 2 and the pulverized coal is conveyed by the flow conveyor 1 according to the present invention to the agglomerator 4.
The agglomerated coal and the coarse-grained coal, which have been made into a lump, are blended and dry-distilled in the coke oven 5. The present invention relates to a chain conveyor that conveys pulverized coal collected from the dust collector 2 in this step.

FIG. 2 is a cross-sectional view showing a device for scraping and removing powder deposits from a flow conveyor according to the present invention. As shown in FIG. 2, the flow conveyor is similar to the conventional flow conveyor in that the carrier powder 8 placed on the center surface and the bottom surface of the trough having a rectangular cross section is attached to the transfer chain 7 which is the lower chain.
The carrying powder 8 is carried while being scraped by. Further, the upper half of the trough is a zone through which the return chain 6 passes, which is the same as in the conventional FIG. In this case, the scraping / removing device 10, which is a feature of the present invention, is installed on the scraping plate 9.

This scraping and removing device has conventionally been provided with a blade made of a hard material with knife edge processing at the tip of a scraping plate for scraping solids, but it is not effective enough to bite solids. Therefore, the scraping-removing device of the present invention has a small contact area in order to take a large amount of surface pressure for biting into the adhered matter so that the scraping-removing device of the present invention bites, cuts out, and conveys it with a scraping plate. In addition, it is made of a hard material such as a round steel or a WC-Co cemented carbide or Al ₂ which has a high hardness and is particularly excellent in wear resistance.
O ₃ , Cr ₂ O ₃ , or Al ₂ O ₃ .Cr ₂ O ₃ solid solution is used.

FIG. 3 is a cross-sectional view of a flow conveyor built in the trough casing according to the present invention. As shown in FIG. 3, the trough casing includes an iron skin wall plate 11 and a bottom plate 1.
The upper half chamber of the trough casing is a zone through which the return-side flow conveyor passes, and the lower half chamber is composed of a powder transfer zone. The flow conveyor having the scraping and removing device 10 welded to the scraping plate 9 in the lower half chamber is run.

FIG. 4 is a view showing a state where the scraping and removing device according to the present invention is in contact with the wall plate and the bottom plate. As shown in FIG. 4, the scraping-removing device 10 welded to the scraping plate 9 is in contact with the iron skin wall plate 11 and the bottom plate 12, and particularly, the iron skin wall plate 11 and the bottom plate 1
It was possible to scrape off the adhered powder even at the corners of 2. Reference numeral 13 is a liner, and 14 is a chain. FIG. 5 is a view showing a state where the scraping and removing device is welded to the scraping plate according to the present invention. That is, the scraping-removing device 10 having a claw shape is welded to the scraping plate 9 by welding 15 and fixed to the scraping plate 9. If the material is not weldable, it may be attached with bolts.

FIG. 6 is a view showing an example of a claw-shaped scraping and removing device according to the present invention. As shown in FIG. 6, the scraping-removing device is made into a round shape by using the above-mentioned hard material, for example, and the tip 16 is cut obliquely to form a claw shape 16 so as to eat the fixed powder. In order to make it easier to insert, the tip has a sharpened claw shape, which reduces the pressing area of the tip, and the pressing surface pressure becomes extremely large, so that it firmly bites into the adhered matter. In other words, like a plow for cultivating farmland, the sticks do not harden by scraping the sticky material and then carrying the scraping board.
Further, it is possible to carry without adhering. In this way, due to the adhesion, growth, and fixation of the powder, the space for passing the scraping plate in the lower half chamber was narrowed, and the motor load was increased. As a result, it was possible to prevent an untransportable trouble called overload stop.

[0012]

As described above, according to the present invention, it is possible to prevent the occurrence of troubles due to the adhesion of powder on the flow conveyer and the inability to convey the powder, and the extremely stable operation is possible. It is an environmentally excellent transport device that prevents the generation of dust.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a coke manufacturing process using a flow conveyor.

FIG. 2 is a cross-sectional view showing a device for scraping and removing powder deposits from a flow conveyor according to the present invention,

FIG. 3 is a cross-sectional view of a flow conveyor built in a trough casing according to the present invention,

FIG. 4 is a diagram showing a state in which the scraping removal device according to the present invention is in contact with a wall plate and a bottom plate;

FIG. 5 is a view showing a state in which the scraping removal device according to the present invention is in contact with a wall plate and a bottom plate;

FIG. 6 is a diagram showing a claw-shaped scraping and removing device according to the present invention;

FIG. 7 is a cross-sectional view showing a scratch plate device in a conventional flow conveyor.

[Explanation of symbols]

 1 Flow Conveyor 2 Dust Collector 3 Coal Dryer 4 Agglomerator 5 Coke Oven 6 Return Chain 7 Transport Side Chain 8 Conveyed Powder 9 Scratch Plate 10 Scraping Removal Device 11 Iron Skin Wall Plate 12 Bottom Plate 13 Liner 14 Chain 15 Welding 16 Claw shape

Claims (1)

[Claims] 1. A device for scraping and removing powder deposits on a flow conveyor used for powder transportation, comprising a plurality of claw-shaped scraping and removing devices obtained by obliquely cutting round steel or the like on a scraping plate of the flow conveyor. Scraping and removing powder deposits on a flow conveyor, which is equipped with a device configured to scrape powder attached to the bottom of the casing and left and right walls and prevent chain run due to growth of deposits. apparatus.