DE202019103103U1 - roll crusher - Google Patents

Abstract

Roller crusher with at least one rotatably mounted in a crusher housing, motor-driven roller (1), or two-roll crusher with rotatably mounted in a crusher housing, motor driven counter-rotating rollers (1) whose central longitudinal axes are directed parallel to each other, wherein on the shell (2) of each roller (1) crushing teeth (3) or other refractive means such as weld beads are arranged, which protrude beyond the jacket (2), wherein in each case between the free end of each crushing tooth (3) or each weld bead of a roll (1) and the opposite shell (2 ) of the other roller (1) or the opposite crushing wall, a small gap is formed, which forms the crushing gap and determines the maximum grain size, characterized in that the roller (1) or the rollers (1) different areas (5,6,) for producing different target particle sizes, wherein the regions (5, 6) over the course of the length of the roller (1) on each other f are arranged olgend.

Description

The invention relates to a roll crusher with at least one rotatably mounted in a crusher housing, motor-driven roller, or two-roll crusher with rotatably mounted in a crusher housing, motor driven counter-rotating rollers whose central longitudinal axes are directed parallel to each other, wherein on the shell of each roller crushing teeth or other refractive agents such Welding beads are arranged, which protrude beyond the jacket, wherein in each case between the free end of each crushing tooth or each bead of a roll and the opposite shell of the other roll or the opposite crushing wall, a small gap is formed, which forms the crushing gap and determines the maximum grain size ,

Such roll crushers are known in the art for the comminution of various materials in many different designs.

Such roll crushers or two-roll crushers serve to shred a material to be comminuted to a desired target grain size. For this purpose, two rollers are often provided, which are arranged parallel to each other and on the lateral surfaces of suitable refractive means, such as crushing teeth or weld beads are arranged, which protrude beyond the lateral surface. The maximum target grain size is formed in such roll crushers or two-roll crushers by the distance between the respective refractive means such as crushing tooth or weld bead of the first roll and the mantle surface of the second roll or the refractive wall. In order to ensure effective collection of the material to be comminuted crushing ratios between 1: 2 to 1:10 are known. Higher crushing ratios are usually not possible in a rolling process. However, since the roll crushers or two-roll crushers known in the prior art have a static crushing gap between the roll shells, which corresponds to the smallest distance, ie the distance between teeth of one roll and the surface of the other roll, a grain size which is already smaller than the existing one Crushing gap, only insignificantly or not further crushed and thus retains the grain size at the exit from the crushing gap. For this reason, such roll crushers or two-roll crushers are not suitable for repeatedly circulating the same material in order to arrive at a larger comminuting ratio. Therefore, in order to obtain a larger crushing ratio, further roll crushers or two-roll crushers having a smaller crushing gap are used to obtain a smaller target grain size. Often, three different roll crushers or two roll crushers may be needed to achieve a desired fine target grain. These cause high costs. In addition, such roll crushers or two-roll crushers require a lot of space.

Due to the above-mentioned prior art, the present invention has the object, a roll crusher or two-roll crusher of the type mentioned in such a way that compared to known solutions significantly increased crushing ratio can be achieved with only a roll crusher or two-roll crusher, so that only very small footprint and can be dispensed with only a small cost on the use of a second or third roll crusher or two-roll crusher with a deviating from the first target grain size.

In order to achieve this object, the invention proposes that the roller or the rollers have different regions for producing different target particle sizes, the regions being arranged successively over the course of the length of the roller.

By means of such a roll crusher or two-roll crusher according to the invention can be achieved with only one machine, a comparison with the prior art solutions significantly increased crushing ratio. Due to the arrangement of different areas to produce different target grain sizes on only one roll or a pair of rolls to be comminuted material in the same machine several times, that is successively in a first crushing stage and then the crushed material in the same machine in a second and optionally a third crushing stage be fed and crushed. Thus, by means of such a roll crusher with only one machine to be stocked, a crushing ratio, for example, in a two-stage process of 1:25 to a three-stage process of about 1: 100 possible. This means in practice on site that not as before several machines, so roll crushers or two-roll crushers must be prepared to achieve appropriate crushing ratios. Since productivity in the field of roll crushers or two-roll crushers is determined by the height of the crushing ratio, such a machine according to the invention significantly increases the productivity compared with existing roll crushers. This is done with minimal additional effort. Only a space requirement for a roll crusher has to be made available in order to achieve particularly high comminution ratios of material to be comminuted. The material to be crushed is in an inventive Roll crusher first fed to the first area, which allows a collection even of coarse pieces of material, the target grain size does not yet correspond to the final target grain size. Subsequently, the material shredded in this region is fed to a second region of the same roll crusher, which has or produces a smaller target grain size than the first region.

Optionally, a further, third crushing region may be provided, to which the material shredded with the second region is fed in order to pass through it again with regard to the target grain size to be achieved and to comminute it accordingly. All crushing stages are coordinated with each other. This means that they can be successively traversed by the material to be shredded to be crushed to the target grain size. The respective next crushing stage is suitable for picking up shredded material from the previous crushing stage and reducing it again to a smaller target grain size. The individual crushing stages can also be used independently if only the respective crushing ratio to be achieved with this crushing stage is sufficient.

By means of such a roll crusher, the use of a second or third roll crusher with differing comminution ratio can be dispensed with in many applications, so that overall significant cost savings are possible. In addition, several machines require significantly more space than just a machine according to the invention, by means of which two or three machines can be replaced.

In particular, it can be particularly preferably provided that in a first region for generating a first target grain size of the crushing gap, which is formed by the distance between crushing tooth of the first roller and shell of the second roller or crushing wall, is greater than the crushing gap in a second region for generating a second target grain size.

The different crushing gaps serve to produce different target grain sizes. Preferably, in the area of the roll used first for comminution, the crushing gap will be significantly larger than the crushing gap of a second or even a third area for producing a second or optionally a third target grain size.

In addition, it can be particularly preferably provided that the regions for generating different target grain sizes are delimited from each other, for example by means of a partition wall or a separating web, which is or is arranged between two adjoining areas.

By arranging such demarcations between the individual areas, it is always ensured that the supplied material is also supplied only to the desired area in order to be crushed there to a corresponding target grain size.

Furthermore, it can be particularly preferably provided that two or three different regions for generating different target grain sizes are arranged successively on each crushing roller.

In addition, it can be particularly preferably provided that a bunker is provided for feeding the material to be comminuted, which can be positioned over the respective region of the roller for generating the respective target particle size.

By means of such, known in the art bunker, the supply of the material to be shredded on fast and easy and thereby accurately positioned position over the respective crushing area of the roller is possible.

It can also be provided in particular that the bunker is held displaceably on housing parts, wherein the bunker can be fixed in a feed position over the respective area of the roller, so that material to be shredded is supplied exclusively to this area.

As a result, a quick and easy and accurate positioning of the bunker is possible.

Furthermore, it can be provided in a particularly preferred manner that a catchment area for receiving the comminuted material is arranged below the roll or the rolls, wherein a screen is arranged between the roll or the rolls and the catch area, which screens the comminuted material in accordance with the desired target grain size.

The arrangement of such a screen between collecting area below the roller and roller, it is always possible to separate the already crushed material with respect to its target grain size. This means that the sieve surface only lets through material with the desired target grain size, which does not have to be reduced further. The material collected by the sieve surface is fed to the machine in a further comminution area in order then to be optionally screened again, so that it is ensured at any time during the comminution process is that only grain with the desired target grain size is generated and removed. The screen surface thus provides a cost-effective and simple, yet extremely safe means of separating and classifying the already comminuted material, thereby effectively preventing oversize particles in the final grain.

In roll crushers or two-roll crushers according to the invention having more than two crushing regions, it is also possible to use different sieves, ie with different mesh sizes for sieving different target grain sizes, so that, for example, after a first crushing of the material, a sieve with a larger or coarser filter stage than when sieving the material, which is generated by the second crushing stage is used.

Finally, it can be particularly preferably provided that the distance between the roller and the crushing wall or the distance between the first and the second roller is adjustable.

By adjusting the roll distance directly the crushing gap can be influenced. This means that, for example, by reducing the crushing gap, the target grain size achieved is reduced, and increasing the crushing gap increases the target grain size. As a result, the range of application of a roll crusher or two-roll crusher according to the invention is again increased.

An embodiment of the invention is shown in the figure and described in more detail below.

• 1 eine erfindungsgemäße Walze mit verschiedenen Brechbereichen und darunter angeordnetem Sieb in Seitenansicht.

It shows:

• 1 a roller according to the invention with different crushing areas and arranged below sieve in side view.

In the figure, essential parts of a roll crusher or a two-roll crusher are shown. A roll crusher has only one roller 1 on, which comminutes the material to be supplied against a crushing wall. In a two-roll crusher are two rotatably mounted in a crusher housing, motor driven in opposite directions rollers 1 provided, whose central longitudinal axes are directed parallel to each other. The rollers 1 show on her coat 2 Emulsifier for crushing the supplied material. These emetics are in the embodiment by crushing teeth 3 educated. Depending on the embodiment and not shown in the figure, other emery agents, such as weld beads on the mantle 2 a roller 1 serve for shredding and be arranged there. The crushing teeth 3 protrude over the coat 2 the roller 1 in front. In each case, between the free end of each crushing tooth 3 a roller 1 and the jacket opposite this 2 the other roller 1 or the opposite crushing wall formed a small gap which forms the crushing gap and determines the maximum grain size in the crushing process.

According to the invention, the rollers 1 or the roller 1 different areas 5,6 to produce different target grain sizes. As can be seen from the figure, the areas 5, 6 are over the course of the length of the roller 1 consecutive, so next to each other, arranged.

To achieve a particularly high comminution ratio, the material to be comminuted first becomes the first region 5 supplied to generate a first target grain size and then in a further pass the second area 6 same roller 1 fed, which achieves a much smaller target grain size when crushing, as the first area 5 ,

In the figure, in the embodiment, a roller 1 shown with two different crushing areas 5,6. Not shown in the figure and also possible it is more than two areas 5,6, for example, three or more than three different areas for crushing and achieving different target particle sizes on a roller 1 train.

It is in the first area 5 for generating the first target grain size of the crushing gap by the distance between crushing tooth 3 the first roller 1 and coat 2 the second roller 1 or the crushing wall is formed, larger than the crushing gap in the second region 6 for generating a second target grain size.

It is not apparent from the figure that the regions 5, 6 and optionally a third or further region are spatially separated from one another for producing different target grain sizes. This can be done by means of a partition wall or a separating web, which is or between adjacent areas 5,6 and optionally a third or further area, take place. For positionally accurate and secure feeding of the material to be shredded, a bunker, not shown in the figure, is provided, which is above the respective region 5, 6 of the roller 1 can be positioned to produce the respective target grain size and feeds the product to be shredded exclusively to this area.

The bunker can be slidably held on housing parts, so that the bunker in a first feed position over the first area 5 the roller 1 is fixable and in a second position over the second area 6 the roller 1 can be fixed, so that only the respective area 5.6 material to be shredded is supplied.

To ensure that the desired target grain size is reached, is below the roller 1 or the rollers 1 a catchment area 7 formed or arranged, which serves to receive the crushed material. Between the roller 1 or the rollers 1 and the catchment area 7 is a sieve 4 second, which screens the shredded material according to the desired target grain size and separates them. Only the material having the target grain size falls through the sieve 4 and can be taken away. The from the sieve 4 Sifted material becomes another crushing process in a second area 6 or, if appropriate, fed to a third region in order to achieve the target grain size or to reduce the grain size of the supplied material.

By means of such a roll crusher or two-roll crusher according to the invention, an extremely high comminution ratio can be achieved with only one machine with extremely small space requirements and low investment costs.

The invention is not limited to the embodiment, but in the context of the disclosure often variable.

All disclosed in the description and / or drawing single and combination features are considered essential to the invention.

LIST OF REFERENCE NUMBERS

1

roller

2

coat

3

crushing teeth

4

screen

5

first area

6

second area

7

catch area

Claims (8)

Roller crusher with at least one rotatably mounted in a crusher housing, motor-driven roller (1), or two-roll crusher with rotatably mounted in a crusher housing, motor driven counter-rotating rollers (1) whose central longitudinal axes are parallel to each other, wherein on the shell (2) of each roller (1) crusher teeth (3) or other refractive means such as weld beads are arranged, which protrude beyond the jacket (2), wherein in each case between the free end of each crushing tooth (3) or each weld bead of a roller (1) and the opposite shell (2 ) of the other roller (1) or the opposite crushing wall, a small gap is formed, which forms the crushing gap and determines the maximum grain size, characterized in that the roller (1) or the rollers (1) different areas (5,6,) for producing different target particle sizes, wherein the regions (5, 6) over the course of the length of the roller (1) to each other are arranged following. Roll crusher or two-roll crusher after Claim 1 , characterized in that in a first region (5) for generating a first target grain size, the crushing gap formed by the distance between breaking tooth 83 of the first roll (1) and jacket (2) of the second roll (1) or crushing wall, is greater than the crushing gap in a second region (6) for generating a second target grain size. Roll crusher or two-roll crusher after Claim 1 or 2 , characterized in that the regions (5,6) are delimited from each other for generating different target grain sizes, for example by means of a partition wall or a separating web, which is or between two adjoining areas (5,6) is arranged. Roll crusher or two-roll crusher after one of Claims 1 to 3 , characterized in that two or three or more than three different regions for generating different target grain sizes are arranged successively on each crushing roller (1). Roll crusher or two-roll crusher after one of Claims 1 to 4 , characterized in that a bunker is provided for supplying the material to be comminuted, which can be positioned above the respective region (5, 6) of the roller (1) to produce the respective target particle size. Roll crusher or two-roll crusher after Claim 5 , characterized in that the bunker is slidably supported on housing parts, wherein the bunker in a feed position over the respective region (5,6) of the roller (1) is fixable, so that only this area (5,6) is fed to shredded material , Roll crusher or two-roll crusher after one of Claims 1 to 6 , characterized in that below the roller (1) or the rollers (1) a collecting area (7) for receiving the crushed material is arranged, wherein between the roller (1) or the rollers (1) and the collecting area (7) Sieve (4) is arranged, which is the crushed material according to the desired target grain size sieves. Roll crusher or two-roll crusher after one of Claims 1 to 7 , characterized in that the distance between the roller (1) and crushing wall or the distance between the first and the second roller (1) is adjustable.

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