EP4344783A1 - Pièce de stator d'un broyeur à impact et procédé de fixation - Google Patents

Pièce de stator d'un broyeur à impact et procédé de fixation Download PDF

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Publication number
EP4344783A1
EP4344783A1 EP23193524.8A EP23193524A EP4344783A1 EP 4344783 A1 EP4344783 A1 EP 4344783A1 EP 23193524 A EP23193524 A EP 23193524A EP 4344783 A1 EP4344783 A1 EP 4344783A1
Authority
EP
European Patent Office
Prior art keywords
stator
spring element
impact mill
tool
holding plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23193524.8A
Other languages
German (de)
English (en)
Inventor
Mario ZÖLLIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swissrtec AG
Original Assignee
Swissrtec AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swissrtec AG filed Critical Swissrtec AG
Publication of EP4344783A1 publication Critical patent/EP4344783A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/185—Construction or shape of anvil or impact plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C2013/1878—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate radially adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C2013/2825—Shape or inner surface of mill-housings with fastening means for fixing lining members to the inner surface of mill-housings

Definitions

  • the present invention describes a stator part of an impact mill, attached to an inner surface of an impact mill housing wall, comprising a plurality of reusable stator tools, which are indirectly releasably attached to the impact mill housing wall distributed along the inner surface, wherein the stator tools, a plurality of rotor tool knives of a rotatable rotor part within the Impact mill housing opposite each other at a defined distance, are operatively connected to the rotor tool knives, so that a grinding chamber in between is formed, and a method for releasably indirect attachment of a stator tool to an inner surface of an impact mill housing wall.
  • Impact mills or rotor mills have been known for a long time and are becoming increasingly important in the treatment of used materials for their recycling. Such impact mills are used to crush soft, medium-hard and fibrous, brittle materials.
  • the input material is fed into the impact mill from above and moved within an impact mill housing between a stator part and a rotor part.
  • the rotor part rotates with its rotor tools along the rigid stator part with appropriately fixed stator tools, high impact forces act on the material, the adhering black mass comes off and the anode and cathode material is simultaneously crushed and takes the form of Balls.
  • Typical diameters of rotor parts are in the range of one to two meters, the number of rotor tools is between 10 and 30 and rotor speeds of 40 to 100 m/s are achieved, with rotors with left and right rotation being preferred.
  • rotor parts 2 are used in different levels, which can be mounted offset.
  • the EP1960109 The applicant's invention provides an impact mill which has the ability to replace the stator tools in the form of tiles from outside the grinding chamber or the interior of the impact mill.
  • the aim was to create an impact mill for lighter input materials, so that the impact mill of the EP1960109 This is disadvantageous, especially for cost reasons.
  • the input materials cause a lot of wear.
  • the choice of materials is limited, with cast iron offering the best cost/benefit ratio.
  • the construction must be solid, especially because of the contaminants that are regularly introduced.
  • the present invention has for its object to optimize a stator part of an impact mill, whereby the arrangement and exchangeability of the stator tools is simplified.
  • an impact mill 0 with an impact mill housing 1 comprising an impact mill housing wall 10 with an inner surface 11, a rotor part 2 with a knife fastening plate 21, rotor part fastening sleeve 22 and a plurality of rotor tool knives 23, and a stator part 3 in Figure 1 shown.
  • the decisive factor is that a sufficiently stable attachment of the rotor tool knives 23 is ensured at an equal distance from the center of the knife fastening plate 21 or the longitudinal axis L on the knife fastening plate 21 at a constant distance from the stator part 3 attached to the inner surface 11 of the impact mill housing wall 10.
  • the stator part 3 is designed in an improved manner, comprising at least one spring element 30, preferably several spring elements 30, attached at least along the circumference of the inner surface 11.
  • the at least one spring element 30 is sufficiently flexible and can be bent, in particular made from a metal sheet.
  • an upper holding plate 31 designed as a ring plate with a plurality of stator tool recesses 310, is arranged.
  • stator tools 32, 33 of different widths can be stored partially threaded.
  • the spring elements 30 are fastened in the edge area of the top of the impact mill housing 1 along the upper circumference.
  • the spring elements 30 are placed on the upper holding plate 31 and fastened there, for example.
  • the at least one spring element 30 or the plurality of spring elements 30 are glued to or on the upper holding plate 31.
  • the fastening can take place on the inner surface 11 of the impact mill housing wall 10 or on the upper holding plate 31.
  • the spring elements 30 have spring element recesses 300 of different sizes, in which narrow stator tools 32 and wide stator tools 33 are mounted in a partially operative connection.
  • the at least one or more spring elements 30 along the circumference of the impact mill housing wall 10 hold the stator tools 32, 33 in position, but are easy to install and remove.
  • a wear disk is usually molded or attached to the cover, which closes the gap between the rotor part 2 and the stator part 3.
  • the wear disk is designed in such a way that it points towards the interior when installed.
  • a lower holding plate 31' is arranged, preferably permanently attached.
  • Stator tool recesses 310' are also provided in the lower holding plate 31', to which narrow Stator tools 32 and wide stator tools 33 adapted, recessed.
  • Both types of stator tools 32, 33 can be detachably attached to the impact mill housing wall 10 by means of spring element 30, upper holding plate 31 and lower holding plate 31' and can be easily and quickly replaced individually without the use of tools. Overall, a clamping connection of the stator tools 32, 33 is achieved supported by gravity.
  • the narrow stator tools 32 are inserted and guided through the stator tool recesses 310 provided for this purpose in the upper holding plate 31 and the spring element recesses 300.
  • the above-mentioned cover prevents them from slipping upwards when the impact mill housing 1 is closed.
  • the narrow stator tools 32 are designed here throughout with a constant width b and can be inserted linearly from the top of the impact mill housing 1 through the spring element recesses 300 in the spring element 30 and the stator tool recesses 310.
  • the narrow stator tools 32 can, as shown by the dashed arrow in Figure 2 indicated, are inserted until their bottom tip is inserted partially immersed into the stator tool recesses 310 'provided for this purpose. Once fully inserted, the stator tools 32 hold releasably in the stator tool recesses 310, 310 'and are positively attached to the impact mill housing wall 10.
  • a grinding chamber is formed between the stator tools 32, 33 and the rotatable rotor tool knives 23, in which recycling material to be separated is separated, with defined distances between the stator tool tips and tips of the rotor tool knives 23.
  • wide stator tools 33 are used, they mainly have a width B, which is larger than the width b of the narrow stator tools 32.
  • the spring elements 30 are used.
  • a transverse groove 330 is arranged on the top of the stator tool on the wide stator tools 33 and an end pin 331, a partial taper of the wide stator tool 33, is arranged on the bottom of the stator tool.
  • the underside of the stator tool with its end pin 331 is inserted into the desired stator tool recess 310 'in the lower holding plate 31' and the stator tool 33 is pivoted upwards, with the upper side of the stator tool in the direction of the spring element 30, as indicated by the dashed arrow. If the stator tool 33 is pivoted vertically, the spring element 30 can engage in the transverse groove 330 of the stator tool 33 in the area of the spring element recess 300. As a result, the wide stator tool 33 is held replaceably on the top of the impact mill housing 1 by the spring element 30. This process is repeated for all wide stator tools 33.
  • the spring elements 30 can be seen as an assembly aid, with the stable attachment taking place by placing the cover of the impact mill 0, preferably with a wear disk, and the cover closing off the open area.
  • stator tool recesses 310, 310 'on the upper and lower holding plates 31, 31' can be arranged differently offset from the center of the holding plate 31, 31'.
  • stator tools 32, 33 are designed with different widths b, B, which can be operatively connected to and held by the spring element 30, the upper holding plate 31 and the lower holding plate 31', wherein the spring elements 30 fulfill an auxiliary holding task.
  • stator tools 32, 33 of different widths, particularly preferably with alternating widths, as shown here, so that directly adjacent stator tools 32, 33 have different widths.
  • stator tools 32, 33 with the same width can be used and correspondingly adapted spring elements 30 and holding plates 31, 31' or correspondingly offset stator tool recesses 310, 310' so that a toothing is achieved.
  • the plurality of spring elements 30 can be fastened to the top of the impact mill housing 1 along the inner surface 11 of the impact mill housing wall 10 by spring element fastening means 301, preferably the spring elements 30 are screwed and at least four spring elements 30 should be used.
  • the spring element 30 is designed in one piece and bent according to the circumferential line of the inner surface 11 of the impact mill housing wall 10. Fastening recesses are arranged in the area of the center of the spring element 30, in which the fastening means 301 can be fastened. In order to fasten and partially thread the stator tools 32, 33, the spring element 30 must have a springy elastic effect.
  • the individual spring element recesses 300, 300 must be matched to the width of the stator tools 32, 33 or to the transverse groove 330 of the wide stator tools 33. In Figure 3 the spring element 30 is shown, whereby no stator tools 32 are shown.
  • the upper holding plate 31 with Stator tool recesses 310 and the lower holding plate 31' with stator tool recesses 310' enable simple and quick assembly of the stator tools 32, 33.
  • stator part 3 with all its stator tools 32, 33 is firmly fixed in the impact mill housing 1 and the distance to the rotatable rotor tool blades 23 is defined on the blade mounting plate 21. If the stator tools 32, 33 wear out after a long period of operation, the stator tools 32, 33 can be replaced individually, easily and quickly.
  • spring elements 30 together with the inserted or pivoted stator tools 32, 33 could also be changed, whereby the undersides of the stator tools 32, 33 must be pulled out of the stator tool recesses 310' in the lower holding plate 31' and each spring element 30 can be removed after loosening the spring element fastening means 301 together with the inserted or pivoted stator tools 32, 33.
  • the spring element 30 or the at least one spring element 30 is so flexible that it can easily be lifted upwards so that the wide stator tool 33 can be easily removed.
  • the holding plate 31 on the bottom of the impact mill housing 1 is designed as an annular plate with a central recess through which parts of the rotor part 2 or the drive can be guided.
  • a circumferential groove running along the inner surface 11 of the impact mill housing wall 10 can be left out, into which the spring elements 30 can be partially inserted and fastened therein.
  • a completely circumferential spring element 30 could also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP23193524.8A 2022-09-29 2023-08-25 Pièce de stator d'un broyeur à impact et procédé de fixation Pending EP4344783A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH001123/2022A CH720075A1 (de) 2022-09-29 2022-09-29 Statorteil einer Prallmühle und Befestigungsverfahren.

Publications (1)

Publication Number Publication Date
EP4344783A1 true EP4344783A1 (fr) 2024-04-03

Family

ID=85556271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23193524.8A Pending EP4344783A1 (fr) 2022-09-29 2023-08-25 Pièce de stator d'un broyeur à impact et procédé de fixation

Country Status (3)

Country Link
US (1) US20240109074A1 (fr)
EP (1) EP4344783A1 (fr)
CH (1) CH720075A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1960109A1 (fr) 2005-12-09 2008-08-27 Swissrtec GMBH Stator de broyeur a percussion
KR101336713B1 (ko) * 2013-05-28 2013-12-04 성안이엔티주식회사 스크류콘 파·마쇄기

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1960109A1 (fr) 2005-12-09 2008-08-27 Swissrtec GMBH Stator de broyeur a percussion
KR101336713B1 (ko) * 2013-05-28 2013-12-04 성안이엔티주식회사 스크류콘 파·마쇄기

Also Published As

Publication number Publication date
CH720075A1 (de) 2024-04-15
US20240109074A1 (en) 2024-04-04

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