RU2634954C2 - Roller crusher, wherein at least one roll provided with flange - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: roller crusher comprises two parallel rolls rotatably mounted in opposite directions towards each other and separated by a gap. Each of the rolls having the first end and the second end comprises a flange attached to at least one of the ends of one of the rolls and extending in radial axis of the roll. The height of the flange above the outer surface of the roll is sufficient to cover the mentioned gap substantially along the crusher gripping angle. In this case, the flange on its inner side has a feeding structure which extends from the inside of the flange towards the other end of the roll.

EFFECT: pressure reduction at the edges of the rolls is prevented.

9 cl, 5 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to a roll crusher having two, as a rule, parallel rolls mounted rotatably in opposite directions towards each other and separated by a gap, with each roll having a first and second end.

BACKGROUND OF THE INVENTION

For crushing or grinding rocks, ore, clinker and other solid materials, roll crushers can be used, having two, as a rule, parallel rolls rotating in opposite directions towards each other and separated by a gap. The material to be ground is fed into the gap by gravity or in bulk. Roller crushers of one type are called high-pressure roller presses or high-pressure roller crushers. In this type of crusher, crushing is performed using the interaction between particles of crushed material. That is, the crushing of the material is carried out not only through the crushing surfaces of the rolls, but through the interaction of the particles themselves of the crushed material.

One example of a high-pressure roll press is disclosed in EP-516952, which describes an improved roll for a roll press that can withstand very large compressive forces in the gap between the rolls for crushing using particle interaction. The roller press has several spaced apart elements with a wear-resistant surface embedded in the pressing surface of the roll, the hardness of the material of these inserts being greater than the hardness of the material of the surface of the roll surrounding them. By changing the size, quantity and material properties of the embedded elements, the abrasion of the press roll is brought into conformity with crushable materials to minimize wear and to ensure that the abrasion profile along the roll corresponds to pressure during prolonged use.

The main problem associated with existing high-pressure roll presses is that the relationship between the roll diameter and its width plays an important role due to the significant edge effect, that is, there is a deterioration in the quality of crushing at the edges of the rolls. This is due to the fact that the material can be rolled over the edges of the rolls, thereby reducing the crushing pressure on the material along the edges of the rolls in the direction of the gap. Thus, the specified parameters of the rolls cannot be changed properly.

SUMMARY OF THE INVENTION

The purpose of this invention is to improve the known crushers. In particular, it is an object of the invention to provide a roll crusher in which the diameter and width of the roll can be changed over a wider range without compromising the quality of crushing.

These and other objectives, as well as the advantages of the invention, which will become clear from its description below, are achieved by means of a roller crusher, made in accordance with the independent claim.

A roll crusher is proposed having two, as a rule, parallel rolls mounted rotatably in opposite directions towards each other and separated by a gap. Each roll has a first and second end. The crusher comprises a flange attached to at least one of the ends of one of the rolls. The flange extends in the radial direction of the roll and its height above the outer surface of the roll is sufficient to close the gap substantially along the angle of capture of the roll crusher. An advantage of the invention is that the presence of a flange eliminates the formation of a problem area at the edges of the rolls, where an edge effect takes place. Thanks to the flange, the material will remain on the outer surface of the roll. That is, the flange prevents the material from being rolled over the edge of the roll. This helps to increase the pressure on the material at the edges of the rolls in the direction of the gap between the rolls. Due to the absence of a problem zone at the edge of the rolls, the diameter and width of the roll can be changed over a wider range without affecting the quality of crushing. In addition, the flanges will contribute to the formation on the rolls of their own protective layer consisting of crushed material.

The flange height may be sufficient to cover the gap substantially along the grip angle of the roll crusher when the gap is set to the maximum operating value. Thus, these advantages will be achieved at the most critical moment of crushing.

The flange on the inner side may contain a feed structure extending from its inner side towards the other end of the roll. The feed design ensures that the pressure on the material at the edges of the rolls is further increased towards the gap between the rolls. The design will come into contact with the material moved within the crushing zone, and the pressure will be optimized.

The feed structure can be made arcuate, continuous, with gaps or combine these configurations. These configurations are preferred for performing the feed structure.

The flange may be made of the first material, and the construction of the second material, harder than the first material. Thus, the feed design will work as a wear-resistant element and provide protection for the flange from abrasion. In addition, the feed design will facilitate the formation and retention of its own protective layer on the flange.

The flange can be divided into several segments, which facilitates its manufacture and installation. The flange can be attached to the roll using glue, bolts, screws, welding, soldering or other suitable fixing methods.

To each end of one of the rolls of the roll crusher can be attached on the flange. In this case, these advantages will be provided at both ends of the roll.

All terms used in the claims should be interpreted in their usual meaning, adopted in the technical field, unless otherwise specified. References to the terms “element, device, component, means, etc.” should be understood simply as references to at least one example of the indicated element, device, component, means, etc., unless otherwise specified. The word “comprising” means “comprising, inter alia.” Further, the "capture angle" is defined as the angle between the horizontal plane passing through the centers of the first roll and the second roll parallel to it, and the straight line passing from the center of the first roll through the point on the second roll parallel to it, in which active contact interaction between the first roll begins and ground material. In the literature related to this field, two different capture angles are distinguished. One capture angle refers to crushing only by means of the surfaces of the rolls, and the other capture angle refers to crushing when the interaction between the particles of the material is also used. Obviously, the capture angle in the second case is smaller than in the first case. This application refers to the angle of capture related to crushing using the interaction between the particles of the material.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objectives of the invention, as well as its features and advantages will become more apparent from the detailed description of the preferred embodiments of the invention, not limiting its scope. The description is accompanied by drawings, where the same elements are denoted by the same digital positions. In the drawings:

FIG. 1 is a perspective view of a roller mill according to one exemplary embodiment of the invention,

FIG. 2a shows in perspective a roll of a roll crusher provided with two flanges extending in the radial direction of the roll,

FIG. 2b is a perspective view of a segment of one of the flanges shown in FIG. 2a

FIG. 3a shows in perspective a roll of a roll crusher provided with two flanges extending in the radial direction of the roll,

FIG. 3b is a perspective view of a segment of one of the flanges of FIG. 3a

FIG. 4a shows a perspective view of a roll crusher roll provided with two flanges extending in the radial direction of the roll,

FIG. 4b is a perspective view of a segment of one of the flanges of FIG. 4a and

FIG. 5 is a side view of the roller mill according to FIG. 1 having only one flange.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In FIG. 1 shows a roll crusher 1 made in accordance with one typical embodiment of the invention. Roll crusher 1 has two, usually parallel to the roll 2, mounted with the possibility of rotation in opposite directions towards each other and separated by a gap. Each roll 2 has a first end 3 and a second end 4. The crusher 1 contains flanges 5 attached to the first and second ends 3, 4 of one of its two rolls 2. Flanges 5 extend in the radial direction of the rolls 2 and their height H above the outer surface 6 the roll is sufficient to cover the gap essentially along the angle α of the capture of the roll crusher 1 when the maximum working value of the gap is set. Flanges 5 are made flat and contribute to the retention of crushed material on the outer surface 6 of the roll. In other words, the flanges 5 prevent the material from passing over the edge of the roll 2. In addition, the flanges contribute to the formation on the rolls of their own protective layer consisting of crushed material. To facilitate the manufacture and installation of flanges 5, they are divided into several segments 7. Flanges 5 are attached to the roll 2, for example, with glue, bolts or screws.

In FIG. 2a shows a roll 2 of a roll crusher 1 having a flange 5 at each end 3, 4 extending in the radial direction of this roll. The flanges 5 are made flat and exclude the formation of a problem zone at the edges of the rolls 2. The flanges 5 hold the material on the outer surface 6 of the rolls 2 and prevent it from overflowing over the edge of the roll 2. This leads to an increase in pressure on the material towards the gap between the rolls 2 on them the edges.

In FIG. 2b shows a segment 7 of the flange 5 of FIG. 2a. The implementation of the flanges 5 of the individual segments 7 facilitates the manufacture and installation of flanges. However, the flanges 5 can be made in the form of a single part.

In FIG. 3a shows a second embodiment of the roll 2 of the crusher 1, in which the flanges 5 have a feeding structure 8 on their inner sides. This structure 8 extends from the inner side of the flange towards the other end 3, 4 of the roller 2. The structure 8 is solid and has an arcuate shape . The structure 8 will increase the pressure on the material in the direction of the gap between the rollers 2 at the edge of the roller 2. The material will come into contact with the structure 8 and extrude into the gap, that is, be fed into the gap in bulk.

In FIG. 3b shows a segment 7 of the flange 5 shown in FIG. 3a. It is understood that the flanges 5 in FIG. 3a, the second embodiment can also be made as a single part.

In FIG. 4a shows a third embodiment of the roll 2 of the crusher 1, where on the inner side of the flanges 5 there is also a feeding structure 8, but it is made at intervals.

In FIG. 4b shows segment 7 of the flange 5 of FIG. 4a. Of course, the flanges 5 in this embodiment can also be made as a single part.

In FIG. 5 is a side view of the roll crusher 1, giving a better view of the capture angle α. From the center of the right roll 2, the first straight line passes through the point at which the active contact interaction between the left roll 2 and the material to be crushed starts, located on the left roller 2. The capture angle α is measured between a horizontal plane passing through the centers of the left and right rolls and the first straight line. This angle is less than two possible angles that can be obtained in accordance with the above definition. In the embodiment of FIG. 5, the height Η of the flange 5 above the outer surface 6 of the roll 2 is sufficient to close the gap substantially along the angle α of gripping the roll crusher 1.

During crushing, the material to be crushed is transported to the crusher 1 by means of a loading device and introduced into the funnel of this device. Then the material is fed into the gap between the two rolls 2 of the crusher 1. The flange 5 of the crusher 1 will help to hold the material on the outer surface 6 of the rolls 2 and increase the pressure on the material towards the gap between the rolls over the entire width of the rolls 2, especially at their edges. After the material has been crushed by two parallel rotating rolls 2, it, under the action of gravity, leaves the gap and is transported from the device.

Although some embodiments of the invention have been described above, those skilled in the art will recognize that other than those described are possible embodiments of the invention within the scope of the claims.

For example, the feed design may be of any suitable size and shape, for example straight, inclined, curved, annular, double or single.

In addition, the size and shape of the flanges can be modified to accommodate multiple feed structures. If the flanges contain several conveying structures, the latter may have different sizes and shapes.

Claims (9)

1. Roll crusher (1) having two rotatably mounted in opposite directions towards each other and separated by a gap, essentially parallel to the roll (2), each of which has a first end (3) and a second end (4), containing a flange (5) attached to at least one of the ends (3, 4) of one of the rolls (2) and extending in the radial direction of the roll (2), and the height (H) of the flange (5) above the outer surface (6) of the roll (2) sufficient to overlap the specified gap essentially along the angle (α) of the grip of the crusher (1), I distinguish ayasya in that the flange (5) at its inner side has a feeding structure (8) extending from the inner side of the flange (5) towards the other end (3, 4) of the roll (2). 2. Roll crusher (1) according to claim 1, wherein the flange height is sufficient to overlap said gap substantially along the crusher grip angle (α) when the gap is set to the maximum operating value. 3. Roller crusher (1) according to claim 1, wherein said structure (8) has an arcuate shape. 4. Roller crusher (1) according to claim 1, wherein said structure (8) is solid. 5. Roll crusher (1) according to claim 1, wherein said structure (8) is made at intervals. 6. Roll crusher (1) according to claim 1, in which the flange is made of the first material, and the structure is made of a second material harder than the first material. 7. Roll crusher (1) according to claim 1, in which the flange (5) is divided into several segments (7). 8. Roll crusher (1) according to claim 1, in which the flange (5) is attached to the roll (2) with glue, bolts, screws, welding, soldering or other suitable fixing methods. 9. Roll crusher (1) according to any one of paragraphs. 1-8, in which to each end (3, 4) of one of the rolls (2) is attached along the flange (5).

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