DE212012000029U1 - shredder - Google Patents

Abstract

A crusher comprising: a box-like frame of the crusher (1) including two back walls (2) and two side walls (3) connecting the back walls; two juxtaposed rotors of the crusher (4, 5) which are supported for rotational movement within the frame of the crusher (1) on the rear walls (2) thereof; the peripheries of the two rotors of the crusher (4, 5) having a plurality of crusher teeth (6, 7), and the sidewalls (3) of the frame of the crusher (1) having counterpart structures (8, 9) corresponding to the respective crusher teeth (6, 7) of both rotors of the crusher (4, 5), and the material (F) to be fed to the shredder is arranged between the crusher teeth (6, 7) of the rotors of the crusher (4, 5) and the counterpart structures ( 8, 9) to be crushed when the rotors of the crusher (4, 5) are rotated; a feed point (12) for the material to be shredded in the upper part of the frame of the crusher (1); and sieve sets (10, 11) below each rotor of the crusher (4, 5), at a selected distance from the teeth (6, 7) of the rotors of the crusher (4, 5) and arranged in a selected angular range of each rotor of the crusher (4, 5) to sift the shredded material of a predetermined particle size out of the crusher, characterized in that one rotor of the crusher (4) for coarse crushing and another rotor of the crusher (5 ) is provided for fine crushing, and the different rotors of the crusher (4, 5) are provided with crusher teeth (6, 7) of different sizes, and accordingly, different counterpart structures (8, 9) are provided with counterparts of different sizes, and Mesh size in sieve sets (10, 11) below the rotors of the crusher (4, 5) are chosen with the intention of producing a product corresponding to that for the final particle size to create set requirements.

Description

Background of the invention

The invention relates to a crusher comprising: a box-like frame of the crusher, which frame includes two back walls and two side walls connecting the back walls; two juxtaposed rotors of the crusher, which rotors are supported for rotational movement within the frame of the crusher on the rear walls thereof; the peripheries of the crusher's two rotors having a plurality of comminuting teeth, and the sidewalls of the comminuting frame having counterpart structures cooperating with the comminuting teeth of both crusher rotors, and the material to be fed into the comminutor being interposed between the comminuting teeth of the rotors the crusher and the counterpart structures are crushed when the rotors of the crusher are rotated; a feed point for the material to be shredded in the upper part of the frame of the crusher; and sieve sets below each rotor of the crusher, which are located at a selected distance from the teeth of the rotor of the crusher and arranged to extend in a predetermined angular range of each rotor of the crusher to the shredded material in a predetermined particle size from the crusher to sift out.

There are known crushers with two rotors, the rotors being identical in the crusher. In that case, the rotors may be mirror images of each other, rotate at the same speed, and operate independently at the same time (in the same direction, in different directions, changing direction, etc.).

Typically, the material to be shredded, such as the starting material, is comminuted with a large dimension or large particle size in a slow speed shredder. This crusher provided with coarse-toothed rotors of the crusher does not provide a sufficiently small particle size in the final product, although the gripping in the feedstock and the capacity are good.

Wherein, if a crusher provided with finely toothed rotors of the crusher is used, the rotors are poorly gripping the starting material in most cases, which is often large in size, such as logs or stumps. In addition, a finer toothing is weaker, taking into account impurities, such as stones or the like, which are often present in the starting material. Fine material, such as sand, unnecessarily uses the gearing, which sifted fine material in a coarse-toothed crusher in the earliest initial stages.

In order to compensate for poor gripping, it is often necessary to feed an additional amount of feedstock to the rotors which serves as a weight. This causes additional wear of the rotors and power consumption. In addition, shutdown of the crusher caused by impurities results in a cumbersome cleaning operation of the crusher jaw. Summary of the invention

The object of the invention is to develop a crusher of the type described above in such a way that the aforementioned problems are solved. This is achieved with a crusher according to the invention, characterized in that a rotor of the crusher for comminuting and a rotor of the crusher for fine comminuting is provided, and that the different rotors of the crusher are provided with comminuting teeth of different sizes, and accordingly , Various counterpart structures are provided with counterparts of different sizes, and that the mesh size of the sieve sets are chosen below the rotors of the crusher with the intention to produce a product according to the requirement for the final particle size requirement. The preferred embodiments of the invention are disclosed in the dependent claims.

The invention is thus based on a combination of a coarse shredder and a fine crusher. The crushing of a source material is performed against the counterpart structures located on the sidewalls of the frame of the crusher, the rotors rotating in the direction of the sidewalls. The rotors are only rotated in the direction of the center in order to break up resulting material arcs, if any, or to remove overloading. The particle size of the final product is determined by the sieve sets below the rotors.

The material to be crushed is fed on the side of the rotor with the coarser teeth. Oversized material that has not passed through the sieve set below the rotor rises up from the center of the rotor and undergoes similar comminution treatment with the finer tooth rotor.

List of figures

The invention will now be described in greater detail by means of a preferred embodiment with reference to the attached drawing, which shows a simplified cross-sectional view of a crusher according to the invention.

Detailed description of the invention

With reference to the drawing, a crusher according to the invention is shown, by way of example and in a highly simplified manner, wherein the crusher comprises a box-like frame 1 with two back walls 2 (of which only the rearmost is visible) and two, the back walls connecting side walls 3 having. Inside the frame of the crusher 1 on the back walls 2 two juxtaposed rotors of the crusher 4 and 5 are operated with conventional triggers, that is rotated, which are not shown. On the circumferences of the two rotors of the crusher 4 and 5 is a variety of crusher teeth 6 and 7 present, and on the side walls 3 the frame of the crusher 1 are counterpart structures 8th and 9 present, with the respective crusher teeth 6 and 7 each rotor of the crusher 4 and 5 interact. The material to be fed into the shredder, for example the starting material F, should be between the crusher teeth 6 and 7 the rotors of the crusher 4 and 5 and the counterpart structures 8th and 9 be crushed while the rotors of the crusher 4 and 5 are rotated in the direction of the arrows shown in the drawing. The feed point 12 for the material to be shredded is located in the upper part of the frame of the crusher 1 , In addition, sieve sets are 10 and 11 below each rotor of the crusher 4 and 5 at a chosen distance from the teeth 6 and 7 the rotors of the crusher 4 and 5 present, and they are arranged to be in a selected angular range of each rotor of the crusher 4 and 5 extend to sift the shredded material in a predetermined particle size from the crusher out.

The special feature of this shredder is that a first rotor of the crusher 4 for coarse crushing and a second rotor of the crusher 5 is intended for fine crushing, and consequently these rotors of the crusher 4 and 5 with crusher teeth 6 and 7 of different sizes, and correspondingly are counterpart structures 8th and 9 provided with counterparts of different sizes, which cooperate with the above-mentioned Zerkleinerzähne 6 and 7 are suitable; and that the mesh size of the sieve sets 10 and 11 below each rotor of the crusher 4 and 5 with the intention of producing a product according to the set final particle size requirement. Of course, that's the feed point 12 for the material to be shredded, for example the starting material F, thus at and above the rotor of the crusher 4 placed for coarse crushing.

As already stated above, the comminution of the starting material F against the counterpart structures 8th and 9 performed, with the rotors 4 and 5 towards the side walls 3 rotate. The rotors 4 and 5 are only rotated in the direction of the center, in order to break up resulting material sheets, if any, or to remove overloading. The particle size in the final product is determined by the sieve sets 10 and 11 certainly. Oversized material that does not pass through the sieve 10 below the rotor 4 gone through, rises from the center of the rotors 4 and 5 upward and becomes a similar crushing treatment with the rotor 5 subjected to the finer toothing.

Preferably, the sieve sets stretch 10 and 11 from below the counterpart structures 8th and 9 to the area between the rotors 4 and 5 approximately up to the height of the axes of the rotors 4 and 5 and they are with a shaped central beam 13 connected between the rotors 4 and 5 extends and at the end walls 2 the frame of the crusher 1 are supported.

Every rotor of the crusher 4 and 5 can be arranged to function independently, whose diameter can be substantially the same size, or, if desired, be of different sizes. Accordingly, their rotational speeds may be the same or different. Also, the mutual axis plane of the rotors of the crusher 4 and 5 be modified. All the parameters mentioned above are chosen according to each particular starting material F, the desired end product and the situation in question.

The above description of the invention is intended only as an illustration of the basic idea of the invention. A person skilled in the art can thus vary their details within the scope of the appended claims.

Claims (10)

A crusher comprising: a box-like frame of the crusher ( 1 ), the two back walls ( 2 ) and two side walls connecting the rear walls ( 3 ) includes; two juxtaposed rotors of the crusher ( 4 . 5 ), which for rotating movement within the frame of the crusher ( 1 ) on the back walls ( 2 ) are supported by the same; the circumferences of the two rotors of the crusher ( 4 . 5 ) a plurality of crusher teeth ( 6 . 7 ), and the side walls ( 3 ) of the frame of the Crusher ( 1 ) Counterpart structures ( 8th . 9 ), which with the respective comminuting teeth ( 6 . 7 ) of both rotors of the crusher ( 4 . 5 ), and the material (F) to be supplied to the comminutor is arranged between the comminution teeth ( 6 . 7 ) of the rotors of the crusher ( 4 . 5 ) and the counterpart structures ( 8th . 9 ) to be comminuted when the rotors of the crusher ( 4 . 5 ) are rotated; a feed point ( 12 ) for the material to be shredded in the upper part of the frame of the crusher ( 1 ); and sieve sets ( 10 . 11 ) below each rotor of the crusher ( 4 . 5 ), at a selected distance from the teeth ( 6 . 7 ) of the rotors of the crusher ( 4 . 5 ) and which are arranged in a selected angular range of each rotor of the crusher ( 4 . 5 ) in order to sieve the comminuted material in a predetermined particle size out of the comminutor, characterized in that a rotor of the comminutor ( 4 ) for coarse crushing and another rotor of the crusher ( 5 ) is intended for fine crushing, and the different rotors of the crusher ( 4 . 5 ) with crusher teeth ( 6 . 7 ) of different sizes, and correspondingly, different counterpart structures ( 8th . 9 ) are provided with counterparts of different sizes, and that the mesh size in sieve sets ( 10 . 11 ) below the rotors of the crusher ( 4 . 5 ) are chosen with the intention of producing a product according to the requirements set for the final particle size. The crusher according to claim 1, characterized in that the feed point ( 12 ) for the material to be shredded at and above the rotor of the crusher ( 4 ) for coarse crushing. The crusher according to claim 1 or 2, characterized in that the sieve sets ( 10 . 11 ) from below the counterpart structures ( 8th . 9 ) up to an area between the rotors ( 4 . 5 ) approximately at the height of the axes of the rotors ( 4 . 5 ) and that they are provided with a shaped central beam ( 13 ) connected between the rotors ( 4 . 5 ) and at the back walls ( 2 ) of the frame of the crusher ( 1 ) is supported. The crusher according to one of the preceding claims, characterized in that both rotors of the crusher ( 4 . 5 ) are arranged to function independently. The crusher according to one of the preceding claims, characterized in that the diameters of the rotors of the crusher ( 4 . 5 ) are substantially the same size. The crusher according to one of claims 1 to 4, characterized in that the diameters of the rotors of the crusher ( 4 . 5 ) are of different sizes. The crusher according to one of the preceding claims, characterized in that the rotational speeds of the rotors of the crusher ( 4 . 5 ) are substantially the same. The crusher according to one of claims 1 to 6, characterized in that the rotational speeds of the rotors of the crusher ( 4 . 5 ) are different. The crusher according to one of the preceding claims, characterized in that the axes of the rotors of the crusher ( 4 . 5 ) are essentially at the same level. The crusher according to one of the preceding claims, characterized in that the axes of the rotors of the crusher ( 4 . 5 ) are on different levels.

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