JPH0127872Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a scraper for a crusher that crushes concrete aggregates for civil engineering construction, industrial raw materials, etc. to produce fine aggregates and fine particles of raw materials for the chemical industry. FIG. 1 is an explanatory cross-sectional view of the crusher to which the present invention is applied, in which 1 is a table with a crushing surface on the top surface, 2
a plurality of rollers surrounding the crushing surface and arranged on the table 1; 3 a drive shaft for driving the table 1; 4 a drive shaft for driving the table 1;
is a raw material input port, 5 is a product discharge port, 6 is a separator, 7 is a scraper plate for product discharge, 8 is an air intake port,
9 is a casing. The raw material inputted into the crusher from the raw material input port 4 falls onto the rotating table 1, from which it moves to the periphery due to centrifugal force and gets caught in the gap between the crushing surface of the roller 2 and the crushing surface of the table 1. crushed and crushed. Among the pulverized raw materials, the generated fine powder is discharged to the outside of the system through the separator 6 by a required amount of air supplied from the air intake port 8. The pulverized raw materials other than fine powder fall below the periphery of the table 1 and are passed through the scraper plate 7 which is rotated by the drive shaft 3.
The product is collected by the product outlet 5 and recovered from the product outlet 5. In the raw material crushing process using the crusher, the movement of the raw materials inside the crusher, especially on the table 1, is regulated by the rotation speed of the table 1 and a dam ring provided around the periphery of the table 1, but this is not always the case. This was not satisfactory, and when the raw material input amount or raw material particle size changed, the operating conditions of the crusher and product properties were affected, leading to unfavorable results. The present invention has been made in view of the above circumstances, and aims to provide a scraper for a crusher that can solve the problems of the crusher and efficiently produce products of desirable quality with high yield. That is, in the present invention, in the crusher, a guide plate that guides and discharges the raw material along the periphery of the table and a guide plate that guides the raw material inside the table can be adjusted between the plurality of rollers. This is a scraper for a crusher, which is characterized by being installed in series. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same members as those in the conventional example are given the same reference numerals, and the description thereof will be omitted. In Figures 2 and 3, 1 is a table;
2 is a roller, 9 is a casing, and 20 is a scraper. The scraper 20 is located above the table 1 in the space between the rollers, and is supported and fixed to the inner wall of the casing 9. That is, 2
1 is a support frame whose end portion is fixed to the casing 9; 22 and 23 are guide plates that are connected to each other at a predetermined angle and are supported by the support frame 21; This guide plate 22,2
3 is configured to be movable in the radial direction of the table 1 by conventional means, and is also configured to be extendable and retractable to the position shown by the chain line in FIG. Further, the angle formed by both guide plates 22 and 23 can be changed as appropriate. Furthermore, this scraper 20
An adjustable gap a is provided between the lower end 24 and the crushing surface 10 of the table 1. The raw materials supplied on table 1 are
As it rotates, centrifugal force causes it to be carried to its outer periphery and crushed by a plurality of rollers 2. The crushed raw material is distributed around the periphery of the table 1 and the casing 9.
In order to avoid over-pulverization, the raw material that falls below the table 1 but has not yet moved to the periphery of the table 1 even though it has been crushed into fine powder is moved to the scraper 20 to avoid over-pulverization.
is guided in the direction shown by arrow A by the guide plate 22, and is caused to fall below the periphery of the table 1. On the other hand, the coarse material M that has passed through the rollers 2 but still needs to be crushed again is guided to the inside of the table 1 by the guide plate 23 extending in the space between the adjacent rollers 2, and is guided to the inside of the table 1. It is bitten by the next roller 2. Such an operation is repeated between each roller 2 and each scraper 20 on the table 1 to obtain a product of the desired quality. That is, according to the device of the present invention, by adjusting the guide plate 22 of the scraper 20 by moving it in and out in the direction shown by the chain line in FIG. Among the raw materials to be produced, those that can be recovered as products or those that can be avoided from being over-pulverized can be discharged from the periphery of the table 1 as appropriate. Further, by adjusting the guide plate 23 of the scraper 20 in the same manner, raw materials that need to be re-pulverized can be held in the table 1 as appropriate. Then, the gap a between the lower end 24 of the scraper 20 and the crushing surface 10 of the table 1 is adjusted according to the raw material particle size and the product particle size, the thickness of the raw material layer on the table 1 is determined, and the product most suitable for the specifications is obtained. be able to. As a result of a comparative crushing test using hard andesite (raw material grain size 5-40) with and without the device attached to the crusher according to the present invention, very good results were obtained as shown in the following table. I got it.

[Table] As mentioned above, conventionally, the movement of raw materials on the table in a crusher is regulated simply by the number of rotations of the table and the dam ring installed around the periphery of the table. If the crusher changes or the rollers or table liner wear out, the operating conditions of the crusher and product properties will be affected, leading to unfavorable results, but the present invention solves these problems. This makes it possible to efficiently produce products of the most desirable quality with high yield.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view of a crusher to which the present invention is applied, FIG. 2 is an explanatory plan view when the scraper according to the present invention is attached to the crusher, and FIG. 3 is an explanatory side view of the same. 1...Table, 2...Roller, 20...Scraper, 22, 23...Guide plate.

Claims (1)

[Scope of utility model registration request] In a crusher equipped with a rotating table having a crushing surface and a plurality of rollers each having a crushing surface facing the crushing surface of the table and crushing the raw material, a portion of the table is disposed between the plurality of rollers. a guide plate that guides and discharges the raw material along the periphery;
A scraper for a crusher, characterized in that a guide plate for guiding raw materials to the inside of the table is arranged in an adjustable manner.