JPH0717382Y2 - Roll crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a roll crusher, and more particularly to a roll crusher for continuously crushing brittle materials such as cement raw materials and cement clinker.

b. Conventional Technology Conventionally, a roll crusher having a pair of columnar or conical crushing rolls has been used for continuously crushing brittle materials such as cement raw materials and cement clinker.

FIGS. 4 and 5 show an example of the above roll crusher. The roll crusher 1 has a large number of linear projections extending on the surface of the rolls 2 and 2 over the entire width thereof in parallel to the roll axis. 4 is provided. With this linear protrusion 4,
Sliding of the powder layer on the surface of the rolls 2, 2 is prevented, abrasion of the roll surface is suppressed, and the raw material 3
The biting of the rolls to the rolls 2 and 2 has been improved (Actually open Sho 62-1746).
No. 37).

Further, as another conventional example, there is one in which the projection 4 is formed in a "F" shape or a striped shape.

c. Problem to be Solved by the Invention Generally, in the roll crusher 1, as can be seen from FIG. 6, there is a large difference in the pressing force acting on the processing raw material 3a between the central portion of the roll 2 and its both ends. Occurs. Because of this, the roll
At both ends of 2 and 2, the pressure applied by the roll did not act effectively on the raw material.

Further, in the conventional roll crusher 1, since the protruding members having various shapes are uniformly provided in the roll width direction, the movement of the processing raw material in the roll circumferential direction is restricted, and the raw material is caught between the rolls. It was effective in improving the inclusion. However, since the restraining force against the movement of the raw material in the width direction of the roll is small, the pressure force of the roll does not act effectively on the raw material to be treated at both end portions of the roll, and therefore the projection 4 of the roll 2
There was a risk that the raw material 3a would flow in the direction of both ends of the roll 2 along, and part of the raw material 3a during the pulverization process would leak to the side from both ends.

Therefore, the product produced from the roll crusher 1 is rolled into a roll.
There was a problem that the raw materials that had not been sufficiently pulverized and leaked from both ends of 2, 2 were mixed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a roll crusher in which raw materials that have not been sufficiently crushed do not mix into the product.

d. Means for Solving the Problems In the present invention, in order to achieve the above-mentioned object, in a roll crusher provided with streak-shaped projections on the surface of the roll, the projections are applied from the center part in the roll width direction to both end parts. The configuration is such that the density is increased stepwise.

e. Operation In the roll crusher according to the present invention, the effective gap between the pair of rolls gradually decreases toward both ends of the roll due to the above-mentioned stepwise densely formed protrusions. The flow toward both ends is restricted. As a result, the pressure applied by the pair of rolls acts substantially uniformly on the raw material to be treated in the axial direction of the rolls, and the crushing is performed at both ends of the roll as in the case of the central portion. As a result, a product having a substantially uniform size over the entire width of the roll can be obtained and the grinding efficiency is improved.

f. Embodiment Hereinafter, one embodiment of the roll crusher according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show an embodiment of the present invention.

The roll crusher 10 of this embodiment has a pair of rolls 11, 11. Three kinds of streak-like protrusions 12a, 12b, 12c are provided on the surfaces of these rolls 11, 11. These protrusions are formed by welding up a wear resistant material on the surfaces of the rolls 11, 11.

Each of the protrusions 12a is formed to have a height of 5 to 10 mm, and is provided in parallel with the roll width direction at an angle of 10 ° at intervals of 50 mm over the entire width of the roll 11. These protrusions 12a eliminate slippage in the circumferential direction on the surface of the roll 11 and allow the raw material to be caught therein.

In addition, a protrusion 12b having a height of 5 to 10 mm is provided 25 mm apart from the protrusion 12a in the roll width direction in a portion from the both ends of the roll 11 to a place about 100 mm into the center side (a region where the pressing force is remarkably reduced). It is provided. 50m from both ends of roll 11
In the part up to the center about m, the protrusion 1
A protrusion 12c having a height of 5 to 10 mm is provided in a direction intersecting with 2a and 12b.

Of these protrusions 12a, 12b, 12c, particularly 12b and 12c prevent the escape of the raw material toward both ends of the roll 11 and the reduction of the crushing pressure.

FIG. 3 shows the distribution of the pressing force acting on the processing raw material over the entire width of the roll 11. In the roll crusher 10, as shown in the figure, a substantially uniform pressure can be obtained over the entire width of the roll.

In FIGS. 1 and 2, 13 is a raw material supply chute, 14 is a bearing for supporting the rolls 11 and 11 in the housing 15, 16 is a hydraulic cylinder, and 17 and 17 are rolls 11 and 11.
Is a drive device that rotationally drives each of these through shafts 18, 18.

g. Effect of the Invention As described above, according to the roll crusher according to the present invention, the protrusions are provided on the surface of the roll in a stepwise high density along the axial direction from the center to both ends. Therefore, it is possible to prevent the pressure applied to the raw material at both ends of the roll from being reduced, and to apply the pressure almost uniformly over the entire width of the roll, and to regulate the escape of the raw material toward both ends of the roll. You can Therefore, leakage from both ends of the roll is eliminated, raw materials that have not been sufficiently crushed are prevented from mixing into the product, and the crushing performance of the roll crusher can be significantly improved.

[Brief description of drawings]

1 and 2 show an embodiment of a roll crusher according to the present invention, and FIG. 1 is a plan view conceptually showing it, and FIG.
FIG. 3 is a view conceptually showing streak-like projections on the roll surface, FIG. 3 is a view showing distribution of a pressing force acting on a raw material to be crushed in the roll width direction, and FIGS. 4 and 5 are conventional drawings. FIG. 4 shows a crusher, and FIG. 4 is a front view conceptually showing it.
FIG. 5 is a plan view conceptually showing it, and FIG. 6 is a view showing a distribution of a pressing force acting on the raw material to be pulverized in the roll width direction. 10 …… Roll crusher, 11 …… Roll, 12a, 12b, 12c ……
Protrusion.

Claims (1)

[Scope of utility model registration request] 1. A roll crusher having streaky protrusions on the surface of the roll, wherein the protrusions are provided with a high density stepwise from the center to both ends in the roll width direction.