Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
  • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
  • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/16—Details
  • B02C18/18—Knives; Mountings thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
  • B07B1/04—Stationary flat screens
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
  • B07B1/12—Apparatus having only parallel elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
  • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/16—Details
  • B02C18/18—Knives; Mountings thereof
  • B02C2018/188—Stationary counter-knives; Mountings thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
  • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
  • B02C2023/165—Screen denying egress of oversize material

Definitions

• the invention relates to a screening device consisting of a comb extension with a plurality of combs formed of flexible material, which are arranged parallel to each other.
• Such screening devices are known, they are used for example on roll crushers, which are used for the comminution of garbage, bulky waste, waste wood and so on.
• the roller shredders have teeth which work against a counter-comb and thereby shred the material.
• baskets with a specific perforation are placed under the crushing roller. These baskets are usually rigidly arranged. With the size and type of perforation, the grain size of the final material is determined. By using the rigid baskets, the shredders become susceptible to interfering substances such as stones, iron pieces and so on. Large parts that have not been crushed and do not fall through the basket are repeatedly taken around the roller and can thereby destroy the cutting unit or the cutting tools or the basket. For fine grinders with a basket perforation of 20 mm to about 80 mm and a speed of the roller of about 100 revolutions per minute, it is therefore absolutely necessary to feed the input material to the comminution free of contaminants. This means that this material must be pretreated.
• screening devices have hitherto been used which have a so-called smooth comb extension in order to screen off the comminuted material and to feed material which has not been comminuted once again over the roller in the comminuting process.
• the advantage of this known from the prior art solution over a rigid basket is that the individual combs of the comb extension are movable in some way and therefore can escape when unzerkleinertes material passes through the comb. This means that the comb can dodge when very large contaminants such as iron get into the funnel. The individual combs of the comb extension can be replaced relatively easily when damaged.
• the disadvantage of the smooth bars is that thin and long material can fall through the gaps between the combs and thus the desired grain accuracy can not be achieved.
• the object of the invention is therefore to propose a screening device which no longer has the disadvantages of the prior art described above.
• the invention is based on the prior art described above and proposes a screening device consisting of a comb extension with a plurality of combs formed of flexible material, which are arranged parallel to one another, which is characterized in that the combs are provided with bends or rounding which serve to form a grid for defining the grain size of the screened material. Because of this solution, it is now possible to form a specific grid for the definition of grain size and thus to achieve a very high accuracy and accuracy of the crushing of the material to be shredded.
• the advantages of the sieve tions, which work with a so-called smooth comb extension, thereby obtained, namely, the combs are effectively flexible. Preferably, these are formed of resilient material such as spring steel.
• the combs have trapezoid bends.
• trapezoidal bends By these trapezoidal bends, a honeycomb-shaped grid is formed, which allows a very good definition of the screen size to be achieved for the comminuted material.
• the distances between the individual combs are variable so that larger or smaller pitches can be obtained. It is also possible to exchange the combs of the comb extension and thereby cause a larger grid is formed. Of course, the entire comb extension can be held up with different comb designs to do so.
• a development of the invention provides that the bends are angled in opposite directions, so that the grid is specified as the already described honeycomb sieve. Furthermore, as mentioned above, an embodiment of the invention is characterized in that the grid is different due to Licher comb sizes is changeable, such that different grains are defined by different sizes.
• a further variant of the screening device according to the invention provides that the bends are offset relative to each other, so that the slots are formed unevenly. Even with this, a specific grid can be produced and certain screening tasks can be better solved.
• Another aspect of the invention is characterized in that the combs have rounded portions which are formed in opposite directions or in parallel, such that the grid is formed in a hole-shaped or serpentine shape.
• the invention also provides a screening device, in which the combs are mutually angled or bent.
• the combs are angled at their free ends, angled upwards, in particular in the installation direction of the roller crusher.
• the combs of the comb extension can be formed from flat material or from round material.
• the combs are formed from spring steel.
• the combs can be formed in one piece or from two or more layers stacked spring steel comb elements.
• the distances between the combs to each other are, according to a development of the invention, changeable or variable.
• the invention also relates to a roller shredder with a screening device as described above.
• An advantageous development of the roller shredder according to the invention provides that the roller is designed for a rotational speed of 20 to 100 revolutions per minute, preferably of 40 revolutions per minute.
• the combs of the comb extension are preferably arranged in the working position under the counter-combs of the roller crusher and furthermore preferably in the intermediate spaces or under the spaces between the counter-combs.
• a development of the invention also provides that the combs of the comb extension are connected directly to the counter-combs of the roller shredder.
• This storage is arranged in the housing of the roller crusher and is preferably pivotally mounted.
• the storage of hydraulic cylinders that engage the storage is movable. This ensures, on the one hand, that the comb extension is in each case in an optimum position with respect to the roller and, on the other hand, the distance between the cutting tools of the roller and the counter-combs can thus also be influenced, for example while the counter combs are mounted on the mounting.
• Fig. 1 embodiment of the invention with honeycomb grid of
• FIG. 2 further embodiment of the invention with trapezoidal co-rotating angled combs and
• Fig. 3 is a known from the prior art screening device with straight ridges.
• Fig. 1 shows an embodiment of the invention with honeycomb grid 3 of the comb extension I.
• the combs 1 are trapezoidal angled in opposite directions to each other, so that a honeycomb pattern 3 is formed.
• By the arrangement of the counter-trapezoidal bent combs 1 creates the grid 3.
• the counter combs 5 of the roller crusher which is not shown, arranged.
• These counter-combs 5 cooperate with the cutting tools arranged on the roller, such that the cutting tools engage in the interstices of the counter-combs and thus the material conveyed in by the roller is comminuted between the cutting tools of the roller and the counter-combs 5.
• the storage is designated, to which the comb extension I and the counter combs 5 are attached.
• This storage 6 is preferably pivotally or rotatably mounted and has at its two ends receiving points where, for example hydraulic cylinders can attack to move the storage including counter comb 5 and comb extension I or exert pressure on this, so that the comb extension I or the counter combs 5 always remain in the desired setting.
• the setting can also be changed by means of these hydraulic cylinders, whereby a change in the grain size of the comminuted material can be achieved.
• the combs 1 of the comb extension I for example, interchangeable, so that in case of failure or destruction of a single comb 1 this can be easily replaced.
• Fig. 2 shows another embodiment of the invention with a trapezoidal shape.
• This training also creates a grid 3, which is formed by serpentine spaces between the combs 1.
• the other reference numerals have already been presented in FIG. 1 and will not be described again.
• Fig. 3 shows a comb extension I, as known from the prior art.
• the individual combs 1 are straight, so that also straight spaces or a concurrently parallel grid 3 is formed.
• the disadvantages of this solution have been described at the beginning.
• the reference numerals also refer to the same technical features, so that not all the reference numbers are presented again.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Combined Means For Separation Of Solids (AREA)
• Crushing And Pulverization Processes (AREA)
• Crushing And Grinding (AREA)
• Food-Manufacturing Devices (AREA)
• Preliminary Treatment Of Fibers (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=36955452

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (9)

Family Cites Families (12)

• 2006
  • 2006-03-03 DE DE202006003533U patent/DE202006003533U1/de not_active Expired - Lifetime
  • 2006-06-07 AT AT06761978T patent/ATE549098T1/de active
  • 2006-06-07 EP EP06761978A patent/EP1909976B1/fr not_active Not-in-force
  • 2006-06-07 WO PCT/EP2006/005419 patent/WO2006131333A2/fr not_active Ceased
  • 2006-06-07 CA CA2610974A patent/CA2610974C/fr not_active Expired - Fee Related
  • 2006-06-07 US US11/921,765 patent/US7992812B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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