EP0380952A2 - Paroi de séparation pour broyeur tubulaire - Google Patents

Paroi de séparation pour broyeur tubulaire Download PDF

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Publication number
EP0380952A2
EP0380952A2 EP90100762A EP90100762A EP0380952A2 EP 0380952 A2 EP0380952 A2 EP 0380952A2 EP 90100762 A EP90100762 A EP 90100762A EP 90100762 A EP90100762 A EP 90100762A EP 0380952 A2 EP0380952 A2 EP 0380952A2
Authority
EP
European Patent Office
Prior art keywords
wall
tube mill
partition according
wear
rear wall
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.)
Granted
Application number
EP90100762A
Other languages
German (de)
English (en)
Other versions
EP0380952A3 (en
EP0380952B1 (fr
Inventor
Ralph Michelsen
Udo Schulze-Brockhausen
Herbert Dr. Weit
Erwin Schmitz
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.)
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Original Assignee
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
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 Christian Pfeiffer Maschinenfabrik GmbH and Co KG filed Critical Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Publication of EP0380952A2 publication Critical patent/EP0380952A2/fr
Publication of EP0380952A3 publication Critical patent/EP0380952A3/de
Application granted granted Critical
Publication of EP0380952B1 publication Critical patent/EP0380952B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/06—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments

Definitions

  • the invention relates to a tube mill partition according to the preamble of claim 1.
  • Such tube mill partitions are generally known, reference being made only to DE-PS 24 47 262, for example.
  • the partitions usually consist of a front, upstream diaphragm wall and a downstream rear wall, which in the present case is considered to be largely closed.
  • An air passage opening extends in the central area between the diaphragm wall and the rear wall and is largely closed for guiding the air flow in the axial direction.
  • the interior space between the diaphragm and rear wall, in which the lifting blades for the regrind are attached, is therefore easy to assemble and difficult to access for maintenance purposes.
  • the invention is therefore based on the object , in particular a tube mill partition as a transfer or discharge wall in particular to design their diaphragm wall with improved wear protection and ease of assembly and maintenance.
  • An essential idea of the invention is directed to equipping the walls and in particular the diaphragm wall with a plurality of segmented wall rings which are assigned to one another radially. Due to this construction it is e.g. possible to keep the radial extension of the wall rings different and to be able to adapt the ring segments or slotted plates specifically to the wear. Since the maximum wear ranges are approximately known to the person skilled in the art due to the material to be ground, the size of the grinding ball and the other parameters of the exact intended use of a tube mill, e.g. the slotted plates of the radially central ring have a radial dimension which corresponds approximately to the maximum wear range.
  • This measure therefore allows only the slotted plates of the middle ring to be replaced after a corresponding operating time, without the outer or inner ring of the slotted wall being affected.
  • these wear bars have an approximately rectangular shape in axial section and are made of a hard, wear-resistant material.
  • Other forms, e.g. Sloping surface for better rejection of regrind and balls are possible.
  • the wear bars are kept relatively narrow in comparison to the extent of the individual slotted plates in the circumferential direction and are primarily attached along the lifting blades fixed in the partition. It can expediently be fastened with a tear-off screw which runs from the diaphragm wall to the rear wall and is provided with a nut on the rear wall side.
  • a screw with e.g. Hexagon head understood, this hexagon head is turned with the appropriate torque when tightening the screw and a circular countersunk head as the head of the screw in a corresponding counterbore e.g. of the wear bar remains.
  • the diaphragm wall panels are usually designed as armor panels and suitably consist of a tough, shatterproof material, after a corresponding operating time, a replacement is necessary above all in the maximum wear range.
  • a replacement and the reinstallation of a single worn slotted plate has so far been carried out by burning out the corresponding countersunk head of the fastening screw and by knocking through the screw bolt, including on the back Mother in the interior of the partition.
  • To attach a newly inserted slotted plate it is therefore necessary to fix the corresponding nut on the rear wall of the mounting flange of the lifting blades using a hand tool via an opening in the central air passage. that an axial escape or rotation of the nut is prevented when the tear-off screw is screwed in from the front of the diaphragm wall.
  • considerable disassembly work is required in order to be able to carry out such a nut fixation.
  • the invention goes the way to cage-like fixing the nuts on the inside of the corresponding wall structure or the mounting flange of a lifting blade.
  • This is suitably done with a polygonal socket adapted to the nut contour, which e.g. is spot welded against the mounting flange. This secures the nut against twisting.
  • a pin made of wire or plastic can preferably be inserted into the socket transversely to the axial direction of the screw. The nut is inserted into the socket and secured with a pin.
  • Socket and pin for holding the nut can also be realized by a cage or, for example, two wires attached to the inside of the fastening flanges in a bow-like manner.
  • the pin or wire thickness is to be interpreted so that a slight axial penetration of the bolt with the mother is possible. With the worn slotted plate removed, it is then possible, for example, to weld a renewed mounting of the nut on the inside of the fastening flanges via this exposed area and to hold the corresponding nut in a cage-like manner.
  • the design of the lifting blades which is curved in the radial direction, also has a wear-reducing effect, with an axial oblique position also being preferred.
  • This axial inclination ensures that the regrind that has entered the partition wall is rapidly diverted from the inside of the diaphragm wall towards the inside of the rear wall and thus the material flow to the rear wall is promoted.
  • this rapid discharge of the ground material reduces the risk of the slots in the slot wall becoming blocked.
  • the wear effect on the inside of the diaphragm wall can therefore be reduced.
  • the arcuate structure is particularly advantageous in the case of poorly flowing regrinds, the stability of the partition wall construction also being improved by the deviation from the strictly radial construction principle.
  • flange regions extending approximately parallel to the surface of the diaphragm wall are preferably provided on the axial edge regions of the lifting blades. These flange areas are suitably adapted to the corresponding fastening areas.
  • the slabs of the diaphragm and rear wall as well as the wear bars are attached.
  • the wear bars are preferably arranged in the radial direction of the corresponding plate edge in the area of the main wear zones. To increase the stability of the partition, it is fastened with bolts extending through the rear wall. Since one can assume that the rear wall is accessible, a corresponding nut holder is not absolutely necessary there. However, taking into account a more frequent replacement of the wear bars. so there is also a slot-side fastening with a short tear-off screw and nut holder.
  • the concept according to the invention achieves a high degree of serviceability, and cost savings are also achieved by designing the essential wear zones with wear bars.
  • a diaphragm wall is fragmentary e.g. shown with a central ring segment 1 in plan view in the flow direction.
  • the middle ring segment 1 which can be connected radially inward and radially outward analog segments, has two arc-segment slit plates 2 and 3.
  • the plate edge 16 therefore merges into the edge area of the wear bar 10.
  • the wear bar 10 made of hard, wear-resistant material is via an upper fastening flange 23 and the lower fastening flange 24 by means of a bolt-like tear-off screw 15 against the rear wall 20 or in a corresponding recess 18 in the rear wall against a wall frame 19 connected thereto.
  • the continuous screw bolt therefore contributes to the better stability of the correspondingly constructed tube mill partition.
  • three screw bolts with their countersunk heads 12 are used to fasten the wear bar 10.
  • the wear block 10, which is approximately cuboid in section, has a countersunk bore 11 on the diaphragm wall side, into which the corresponding head 12 engages with the tear-off screw 15.
  • the slotted plates 2, 3 are fixed with similar tear-off screws 25 (FIG. 3) against the flange fastenings 23 of the lifting blades 22. Adjacent to the wear bar 10, for example, two tear-off screws 25 are used to fasten the respective slotted plate 3.
  • the countersunk head 13 of the tear-off screw 25 is positively in the countersunk bore 14 of a slotted plate.
  • a cage-like bush 27 is e.g. provided welded at 18. A spot or multipoint weld is sufficient for this.
  • this bushing 27 is first fixed against the mounting flange. Subsequently, the nut 26 is inserted therein and held in it in a cage-like manner by a pin 29 lying transversely to the axis, twisting and axial displacement of the nut being excluded.
  • the nut 26 held in this way can then be fastened easily from the front of the diaphragm wall and without having to hold the nut with tools in the interior of the partition.
  • the pin 29, for example made of plastic, is usually broken when screwing, which is interrupted ne line is indicated at the latest, however, when dismantling the individual slotted plate 3 and after the corresponding countersunk head 13 of the tear-off screw 25 has been burned out, the axial securing means provided by the pin 29 is destroyed by the application of axial force and penetration of the screw bolt.
  • the socket 27 is of course adapted to the outer contour of the nut used.
  • the use of the wear bars 10 therefore leads to a reduction in wear e.g. for slotted panels. Due to the maintenance-friendly bracket, there is the possibility of a relatively simple, uncomplicated exchange of individual slotted plates without having to create larger mounting openings in the partition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Connection Of Plates (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP90100762A 1989-02-03 1990-01-15 Paroi de séparation pour broyeur tubulaire Expired - Lifetime EP0380952B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE8901231U DE8901231U1 (fr) 1989-02-03 1989-02-03
DE3903255A DE3903255A1 (de) 1989-02-03 1989-02-03 Rohrmuehlen-trennwand
DE3903255 1989-02-03

Publications (3)

Publication Number Publication Date
EP0380952A2 true EP0380952A2 (fr) 1990-08-08
EP0380952A3 EP0380952A3 (en) 1990-10-10
EP0380952B1 EP0380952B1 (fr) 1993-05-26

Family

ID=39363846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100762A Expired - Lifetime EP0380952B1 (fr) 1989-02-03 1990-01-15 Paroi de séparation pour broyeur tubulaire

Country Status (7)

Country Link
US (1) US5016826A (fr)
EP (1) EP0380952B1 (fr)
JP (1) JPH0729065B2 (fr)
DE (2) DE3903255A1 (fr)
DK (1) DK0380952T3 (fr)
ES (1) ES2042079T3 (fr)
IT (1) IT1229453B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000127A1 (fr) * 1994-06-24 1996-01-04 Slegten Societe Anonyme Dispositif de fixation des rapes de fonte standard des batis de cloisonnement existants d'un broyeur tubulaire
CN108704722A (zh) * 2018-06-08 2018-10-26 中信重工机械股份有限公司 一种大型自磨机/半自磨机用耐磨衬板

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960016970A (ko) * 1994-11-14 1996-06-17 야시마 사부로 분말체 처리장치 및 그 장치에 이용되는 슬릿부재의 제조방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507604A1 (de) * 1966-12-22 1969-07-17 Miag Muehlenbau & Ind Gmbh UEberfuehrungswand einer Rohrmuehle
FR2122251A5 (fr) * 1971-01-15 1972-08-25 Smidth & Co As F L
FR2345213A1 (fr) * 1976-03-26 1977-10-21 Polysius Ag Cloison elevatrice pour broyeur tubulaire
FR2565850A1 (fr) * 1984-06-14 1985-12-20 Panissod Dominique Paroi a fentes pour broyeur tubulaire
WO1986004526A1 (fr) * 1985-02-08 1986-08-14 Slegten, Societe Anonyme Dispositif de regulation du temps de sejour d'un materiau dans un broyeur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1440002A (en) * 1920-02-18 1922-12-26 Francis Dean Bradley Grinding mill
US1769823A (en) * 1928-11-26 1930-07-01 Born Leon Grinding machine
US2405059A (en) * 1943-10-11 1946-07-30 Smidth & Co As F L Indicating device for material treating apparatus
BE793531A (fr) * 1972-02-02 1973-04-16 Koppers Co Inc Perfectionnements aux broyeurs
SU1065015A1 (ru) * 1982-05-05 1984-01-07 Научно-Исследовательский Институт Тяжелого Машиностроения Производственного Объединения "Уралмаш" Корпус барабанной мельницы

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507604A1 (de) * 1966-12-22 1969-07-17 Miag Muehlenbau & Ind Gmbh UEberfuehrungswand einer Rohrmuehle
FR2122251A5 (fr) * 1971-01-15 1972-08-25 Smidth & Co As F L
FR2345213A1 (fr) * 1976-03-26 1977-10-21 Polysius Ag Cloison elevatrice pour broyeur tubulaire
FR2565850A1 (fr) * 1984-06-14 1985-12-20 Panissod Dominique Paroi a fentes pour broyeur tubulaire
WO1986004526A1 (fr) * 1985-02-08 1986-08-14 Slegten, Societe Anonyme Dispositif de regulation du temps de sejour d'un materiau dans un broyeur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000127A1 (fr) * 1994-06-24 1996-01-04 Slegten Societe Anonyme Dispositif de fixation des rapes de fonte standard des batis de cloisonnement existants d'un broyeur tubulaire
BE1008467A3 (fr) * 1994-06-24 1996-05-07 Slegten Sa Dispositif de fixation de grilles coulees standards sur chassis de cloisons existants pour tube broyeur et procede a cet effet.
US5829693A (en) * 1994-06-24 1998-11-03 Slegten Societe Anonyme Device for holding standard cast grates of existing partitions frames in tube mills
CN108704722A (zh) * 2018-06-08 2018-10-26 中信重工机械股份有限公司 一种大型自磨机/半自磨机用耐磨衬板

Also Published As

Publication number Publication date
EP0380952A3 (en) 1990-10-10
ES2042079T3 (es) 1993-12-01
US5016826A (en) 1991-05-21
JPH0729065B2 (ja) 1995-04-05
DE8901231U1 (fr) 1989-03-23
EP0380952B1 (fr) 1993-05-26
DE3903255A1 (de) 1990-08-09
DE3903255C2 (fr) 1991-09-05
IT1229453B (it) 1991-08-08
DK0380952T3 (da) 1993-10-04
JPH02233154A (ja) 1990-09-14
IT8920796A0 (it) 1989-06-06

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