JPH02207849A - Roll crusher - Google Patents

Abstract

PURPOSE:To obtain pulverized powdery material by forcedly rotating a crushing roll around a rotary axial center and pushing it on the other crushing roll and also freely rotating the other crushing roll around a rotary axial center and freely movably supporting this roll so as to be moved back and forth to the direction of the rotary shaft. CONSTITUTION:Brittle material 8 contained in a supply shute 7 falls toward the lower gap S and is pressed on the outer circumferential face of the driven crushing roll 2 because a driving crushing roll 1 rotated by a motor 6 is pushed by the hydraulic cylinders 3. Since the driven roll 2 is rotated, shearing force directed to the circumferential directions of both crushing rolls 1, 2 is allowed to act on the brittle material 8 in the interval of the gap S. On the other hand, since the driven crushing roll is moved back and forth to the direction of the rotary shaft by a hydraulic cylinder 4, shearing force directed to the longitudinal directions of both crushing rolls 1, 2 is simultaneously allowed to act on the brittle material 8. This brittle material 8 being compressed and crushed is effectively disintegrated by synergistic effect of these shearing forces and made pulverized material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pulverizer, and particularly to a roll pulverizer that continuously pulverizes brittle materials such as cement raw materials and cement tarinkers.

[Conventional technology]

As is well known, a roll crusher having two cylindrical crushing rolls is used to continuously crush fragile materials such as cement raw materials and cement barrels. As an example of such a roll crusher, Japanese Patent Application Laid-Open No. 62-27044
The device disclosed in Publication No. 8 will be explained below with reference to FIGS. 3 and 4.

This roll crusher separates powder from one side and the other to prevent the generation of plate-shaped flakes and powder aggregates. By changing the circumferential speed of the crushing roll, the brittle material is compressed and crushed, and at the same time, a shearing force is applied in the circumferential direction of the crushing roll. As shown, the crushing rolls (51) and (52) are truncated conical canes, and are parallel to each other so that the large diameter side of one crushing roll (51) and the small diameter side of the other crushing roll (52) are on the same side. , and each of these is rotatably supported around a horizontal axis, and a predetermined gap (S) is provided between their opposing outer peripheral surfaces.

In addition, as another example other than the above, as shown in FIG. 4, which is a schematic side view, the crushing rolls (51) and (52) are both cylindrical, and each of them is connected to a separate rotating device F.
Also disclosed is one in which the rotational speed is made different by (53) and (54).

Therefore, when the brittle material (55) is supplied between these re-grinding rolls (51) and (52), this brittle material (55)
Since it is compressed and pulverized and simultaneously receives a shearing force based on the difference in the peripheral speed of the pulverizing rolls, the occurrence of flakes is reduced.

[Problem to be solved by the invention]

The roll crusher described above is useful in its own way because shearing force acts on the brittle material during compression and crushing due to the difference in the peripheral speed of the two crushing rolls, but from the viewpoint of crushing performance and economic efficiency of brittle materials, it is still below. There are problems as explained in .

In other words, there is the problem that it is not always possible to obtain a sufficiently powdered product simply by the difference in peripheral speed between the two grinding rolls, and since each grinding roll is rotated by an individual drive device, equipment costs are increased. There is also the problem of being economically disadvantaged.

Therefore, it is an object of the present invention to provide an economical roll crusher that can produce a sufficient amount of crushed material.

[Means to solve the problem]

The present invention has been made to solve the above-mentioned problems, and therefore the roll crusher according to the present invention has a pair of crushing rolls rotated about horizontal and parallel axes. In a roll crusher for material crushing, one of the pair of crushing rolls is forcibly rotated around the rotational axis by a drive device, and is pressed against the other crushing roll, and the one crushing roll is The other crushing roll is supported so as to be rotatable around the rotational axis and reciprocated in the axial direction within a range that does not displace the other crushing roll in the longitudinal direction.

[Effect]

According to the roll crusher of the present invention, the other crushing roll does not come off in the longitudinal direction of one of the crushing rolls, so that the brittle material is crushed between these re-grinding rolls. The rotation of one grinding roll is transmitted to the other grinding roll via the brittle material supplied between the re-grinding rolls, and this brittle material is horizontally moved by the reciprocating motion of the other grinding roll in the direction of the rotational axis. Subject to directional shear forces.

〔Example〕

An embodiment of the roll crusher according to the present invention will be described below based on FIG. 1, which is a schematic plan view of the roll crusher, and FIG. 2, which is a side view thereof.

That is, the reference numeral (1) shown in the figure is a driving pulverizing roll, and this driving pulverizing roll (1) is rotated by an electric motor (6) via a speed reducer (5). A hydraulic cylinder (4) is placed at a position apart from the driving crushing roll (1) by a predetermined gap (3) so that the driving crushing roll (1) can be reciprocated by a predetermined distance in the direction of its rotation axis. Also, only the moving range of the bone rotatably supported the long driven crushing roll (2).

Furthermore, the drive crushing roll (the hydraulic cylinder (3)
Accordingly, the gap (S) between this and the driven crushing roll (2) can be adjusted, and a compressive crushing force can be applied to the brittle material (8) supplied between this gap (S).

In addition, as shown in Fig. 2, re-grinding rolls (1) and (2)
) and at a position corresponding to the gap (S) is a supply chute (7) for supplying the brittle material (8).
Moreover, bearings (b) support both ends of each of the re-grinding rolls (1) and (2).

The operation mode of the roll crusher configured as described above will be explained below. The brittle material (8) supplied into the supply unit (7) continues to fall toward the gap (S) below, and then continues to fall. The brittle material (8) is crushed by a hydraulic cylinder (
By being pushed by the pressing force of 3), it is pushed in the direction of the arrow shown in FIG. 2 and continues to be pressed against the outer peripheral surface of the driven grinding roll (2).

Then, the driven crushing roll (2) continues to be rotated through the fragile material (8) due to this pressing force, but in order to rotate this driven crushing roll (2), the fragile material ( 8) is subjected to shearing force in the circumferential direction of the re-grinding rolls (1) and (2), while the driven crushing roll (2) is driven by the hydraulic cylinder (4), as shown by the arrow in FIG. As it continues to be reciprocated in the direction of its rotation axis, this brittle material (8) is further crushed by re-grinding rolls (1) and (2).
A shearing force in the longitudinal direction also acts.

Due to the synergistic effect of these shear forces, the brittle material (8) being compressed and crushed is effectively loosened and becomes a crushed material.
Next, the manufactured pulverized material is transported to a predetermined position by, for example, a belt conveyor (not shown) provided below the roll pulverizer.

In this way, the shearing force in both the circumferential direction and the longitudinal direction of the crushing roll acts on the brittle material (8) that continues to be compressed and pulverized between the gaps (S), so that the particles of this brittle material (8) This prevents the bonds between them, making it possible to crush them more effectively.

Therefore, even if plate-shaped flakes are generated, the bonding force between the particles of the brittle material (8) is weak, so these flakes can be easily pulverized without using any particular crushing equipment. .

Above, we have explained an example in which the length of the driven grinding roll (2) is longer than that of the driving grinding roll (1) by the travel range, but this is only an economic issue; Even if the rolls (1) and (2) have the same length, the shape of the feed supply (7) should be considered so that the brittle material (8) can be supplied between the gap (S) in the range where they face each other. Then, there will be no problem in compressing and crushing the brittle material (8).

The above-mentioned embodiment is only one specific example of the present invention, and therefore, the scope of the technical idea of the present invention is not limited by this embodiment, and furthermore, design changes, etc. may not be made within the scope of this technical idea. It's free.

[Effects of the Invention] According to the roll crusher of the present invention, the shearing force is not only generated based on the difference in circumferential speed of two crushing rolls as in the conventional roll crusher, but also in the direction of the rotational axis of the other crushing roll. Since the brittle material is also subjected to horizontal shearing force due to the reciprocating motion of the machine, it has become possible to obtain a pulverized material that is sufficiently pulverized into powder.

In addition, only one crushing roll rotating device is required to rotate one crushing roll, which is extremely advantageous economically when comparing the cost difference between a hydraulic cylinder that reciprocates the other crushing roll and a crushing roll rotating device. Ta.

Furthermore, the structure of the roll crusher itself has become simpler, which has become advantageous in terms of maintenance.

Therefore, according to the present invention, it has been possible to realize an extremely economical and useful roll pulverizer that can produce a sufficient amount of pulverized material.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a schematic roll crusher according to an embodiment of the present invention, FIG. 2 is a side view of a schematic roll crusher according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of a conventional roll crusher. A plan view of the machine, FIG. 4 is a side view of another conventional roll crusher. (1)-driving grinding roll, (2)-0 driven grinding roll,
(3), (4) - Hydraulic cylinder, (5) - Reducer, (6
) - electric motor, (7) - feed chute, (8) - brittle material. Figure 1 Figure 2 Patent applicant Kobe Steel, Ltd.

Claims (1)

[Claims] (1) In a roll crusher for crushing brittle materials, which has a pair of crushing rolls that are rotated horizontally and parallel to each other around their axes, one of the pair of crushing rolls is rotated around its rotation axis by a drive device. Forcibly rotate the crushing roll and press it against the other crushing roll, and at the same time, the other crushing roll can freely rotate around the rotation axis within a range that does not dislodge the one crushing roll in the longitudinal direction, and in the direction of the axis. A roll crusher characterized by being supported so that it can freely reciprocate.