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EP0380952B1 - Paroi de séparation pour broyeur tubulaire - Google Patents

Paroi de séparation pour broyeur tubulaire Download PDF

Info

Publication number
EP0380952B1
EP0380952B1 EP90100762A EP90100762A EP0380952B1 EP 0380952 B1 EP0380952 B1 EP 0380952B1 EP 90100762 A EP90100762 A EP 90100762A EP 90100762 A EP90100762 A EP 90100762A EP 0380952 B1 EP0380952 B1 EP 0380952B1
Authority
EP
European Patent Office
Prior art keywords
slotted
wall
tube mill
nut
partition according
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.)
Expired - Lifetime
Application number
EP90100762A
Other languages
German (de)
English (en)
Other versions
EP0380952A3 (en
EP0380952A2 (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 as a transfer or discharge wall according to the preamble of claim 1.
  • Such a tube mill partition is known from WO-A-86/04 526.
  • a slot and a rear wall form a discharge chamber in which lifting blades are arranged almost radially. Since the mill works in the wet process and with a ball filling, for example, the central opening on the slot wall is sealed with a disk.
  • the regrind is discharged via an axially arranged discharge blade which interacts with the lifting blades and projects into the discharge chamber.
  • the concentric ring segments of the diaphragm wall are wedged with radially oriented, protector-like and protruding elements which, together with protruding ribs, are intended to counter wear of the diaphragm wall segments. In the area of the wedge-like wear bars, continuous screw fastenings are provided up to the rear wall.
  • a lifting wall for installation in a tube mill with a central transfer cone in an air passage opening is known, in which the individual lifting blades are provided with radially adjustable lifting blades between a diaphragm wall and a substantially closed rear wall.
  • the transfer cone consists of segments on which side plates are attached for fastening the adjustable lifting blades. It is fastened with the help of a countersunk screw and a nut to be subsequently secured, which is arranged in a correspondingly large hole. An actuation of the screw fastening solely from the screw head side is not possible with this construction.
  • the invention has for its object to develop a generic tube mill partition, which in particular has improved wear protection, so that it is particularly easy to install and maintain.
  • this object is achieved in a tubular mill partition with a front diaphragm wall and a downstream, essentially closed rear wall and with approximately radially oriented lifting blades between the diaphragm and rear wall, the diaphragm and rear wall in each case are constructed in the manner of a ring segment and at least the diaphragm wall has a plurality of concentric ring segments made of diaphragm plates, with approximately radially oriented wear bars between the diaphragm plates, which protrude at least slightly from the plane of the diaphragm wall and with screw fastenings for the wear bars which extend through to the rear wall in such a way that the lifting vanes for the slot - And rear wall have surface-parallel mounting flanges, in the area of which the ring segments of the slotted and rear wall and the wear bars are fastened, with screw fastenings ending with at least for the slotted plates in the interior of the partition being provided with a lock nut.
  • 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 countersunk hole e.g. of the wear bar remains.
  • the solution according to the invention is discussed with respect to the diaphragm wall.
  • 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.
  • larger diameters of a partition for example approx. 5 m, 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 mother 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 arched structure is particularly advantageous in the case of poorly flowing regrinds, the deviation from the strictly radial construction principle also improving the stability of the partition construction.
  • 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, if one takes into account a more frequent replacement of the wear bars, 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.
  • This type of anti-rotation device can also be used for screw fastening the wear bars.
  • 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 by the Line is indicated. However, at the latest when disassembling 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)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Connection Of Plates (AREA)

Claims (10)

  1. Cloison séparatrice de tube broyeur, jouant le rôle de cloison de transfert ou de décharge, comprenant :
    - une paroi à rainures (1) et, lui faisant face, une paroi arrière sensiblement fermée (20) ;
    - des pales de poussée (22) orientées sensiblement radialement entre les parois à rainures et arrière (1) et (20) qui sont constituées chacune de segments annulaires, au moins la paroi à rainures (1) comprenant plusieurs segments annulaires concentriques constitués de plaques rainurées (2, 3) ;
    - des barrettes d'usure (10) orientées sensiblement radialement entre les plaques rainurées (2, 3) et dépassant, au moins faiblement, le plan de la paroi à rainures (1) ;
    - des moyens de fixation (15), vissés traversant jusqu'à la paroi arrière (20) pour les barrettes d'usure (10) ;
    caractérisée en ce que :
    - les pales de poussée (22) comportent des portées de fixation planes (23, 24), s'étendant parallèlement par rapport aux parois à rainures et à la paroi arrière (1 et 20) et dans la zone desquelles sont fixés les segments annulaires des parois (1, 20) ainsi que les barrettes d'usure (10), tandis qu'il est prévu, au moins pour les plaques à rainures (2, 3) des fixations (25), se terminant par vis, à l'intérieur de la cloison séparatrice par un écrou (26) équipé d'une sécurité antirotation.
  2. Cloison séparatrice selon la revendication 1, caractérisée en ce que les écrous (26) équipés d'une sécurité antirotation comportent une sécurité axiale (29), démontable.
  3. Cloison séparatrice selon l'une des revendications 1 ou 2, caractérisée en ce que les fixations par vis (15, 25) comportent, du côté de la paroi à rainures, des vis d'usure à têtes noyées.
  4. Cloison séparatrice selon l'une des revendications 1 à 3, caractérisée en ce que la sécurité antirotation (27) et la sécurité axiale (29) des écrous (26) sont constituées par une cage d'écrou et fixée sur la face interne de la paroi à rainures, en particulier sur les portées de fixation.
  5. Cloison séparatrice selon l'une des revendications 1 à 4, caractérisée en ce que la sécurité antirotation (27), de l'écrou (26) est constituée par une douille (27) polygonale ajustée au contour de l'écrou qui est fixée sur la face interne de la paroi à rainures, en particulier par soudure, ou que l'écrou lui-même soit fixé par soudure.
  6. Cloison séparatrice selon l'une des revendications 1 à 5, caractérisée en ce que la sécurité axiale (29) de l'écrou (26) est constituée par une tige (29), perpendiculaire à l'axe de la vis de fixation, montée en particulier dans la sécurité antirotation (27), la tige étant une broche en matière plastique ou un fil métallique.
  7. Cloison séparatrice selon l'une des revendications 1 à 6, caractérisée en ce que les pales de poussée (22) sont inclinées par rapport à la direction axiale.
  8. Cloison séparatrice selon l'une des revendications 1 à 7, caractérisée en ce que des barrettes d'usure (10) sont prévues également sur la paroi arrière (20).
  9. Cloison séparatrice selon l'une des revendications 1 à 8, caractérisée en ce que les barrettes d'usure (10) sont faites d'un matériau dur, résistant à l'usure, en particulier de l'acier trempé.
  10. Cloison séparatrice selon l'une des revendications 1 à 9, caractérisée en ce que les bords radiaux (7, 8) des plaques annulaires, des plaques rainurées (2, 3) et/ou des barrettes d'usure (10) ont leurs formes adaptées au tracé courbe des pales de poussée (22).
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
DE3903255 1989-02-03
DE3903255A DE3903255A1 (de) 1989-02-03 1989-02-03 Rohrmuehlen-trennwand
DE8901231U DE8901231U1 (de) 1989-02-03 1989-02-03 Rohrmühlen-Trennwand

Publications (3)

Publication Number Publication Date
EP0380952A2 EP0380952A2 (fr) 1990-08-08
EP0380952A3 EP0380952A3 (en) 1990-10-10
EP0380952B1 true 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) DE8901231U1 (fr)
DK (1) DK0380952T3 (fr)
ES (1) ES2042079T3 (fr)
IT (1) IT1229453B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
US5769338A (en) * 1994-11-14 1998-06-23 S Fimatec Ltd. Pulverulent body processing apparatus and method of manufacturing a slit member to be used for the same
RU2236299C1 (ru) * 2003-01-15 2004-09-20 Пенкин Николай Семенович Гуммированный диск бисерной мельницы
RU2283181C2 (ru) * 2004-07-08 2006-09-10 Виктор Михайлович Сербин Гуммированный ротор бисерной мельницы
CN108704722B (zh) * 2018-06-08 2020-02-04 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

Family Cites Families (10)

* 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
DE1507604A1 (de) * 1966-12-22 1969-07-17 Miag Muehlenbau & Ind Gmbh UEberfuehrungswand einer Rohrmuehle
GB1312553A (en) * 1971-01-15 1973-04-04 Smidth & Co As F L Grinding mills
BE793531A (fr) * 1972-02-02 1973-04-16 Koppers Co Inc Perfectionnements aux broyeurs
DE2613062B2 (de) * 1976-03-26 1979-03-01 Polysius Ag, 4720 Beckum Hubwand
SU1065015A1 (ru) * 1982-05-05 1984-01-07 Научно-Исследовательский Институт Тяжелого Машиностроения Производственного Объединения "Уралмаш" Корпус барабанной мельницы
CH657074A5 (fr) * 1984-06-14 1986-08-15 Dominique Panissod Paroi a fentes pour broyeur tubulaire.
LU85767A1 (fr) * 1985-02-08 1986-09-02 Communition Tech Comminutec Dispositif de reglage du temps de retention du materiau dans un broyeur

Also Published As

Publication number Publication date
ES2042079T3 (es) 1993-12-01
DE8901231U1 (de) 1989-03-23
EP0380952A3 (en) 1990-10-10
EP0380952A2 (fr) 1990-08-08
US5016826A (en) 1991-05-21
DE3903255A1 (de) 1990-08-09
IT1229453B (it) 1991-08-08
JPH0729065B2 (ja) 1995-04-05
DK0380952T3 (da) 1993-10-04
JPH02233154A (ja) 1990-09-14
IT8920796A0 (it) 1989-06-06
DE3903255C2 (fr) 1991-09-05

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