EP0532145B1 - Désintégrateur - Google Patents

Désintégrateur Download PDF

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Publication number
EP0532145B1
EP0532145B1 EP92301537A EP92301537A EP0532145B1 EP 0532145 B1 EP0532145 B1 EP 0532145B1 EP 92301537 A EP92301537 A EP 92301537A EP 92301537 A EP92301537 A EP 92301537A EP 0532145 B1 EP0532145 B1 EP 0532145B1
Authority
EP
European Patent Office
Prior art keywords
ribs
macerator
side rail
cutters
slots
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
EP92301537A
Other languages
German (de)
English (en)
Other versions
EP0532145A1 (fr
Inventor
Robert Pepper
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.)
NOV Process and Flow Technologies UK Ltd
Original Assignee
Mono Pumps Ltd
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 Mono Pumps Ltd filed Critical Mono Pumps Ltd
Publication of EP0532145A1 publication Critical patent/EP0532145A1/fr
Application granted granted Critical
Publication of EP0532145B1 publication Critical patent/EP0532145B1/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
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
    • 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
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/142—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with two or more inter-engaging rotatable cutter assemblies

Definitions

  • the present invention relates to a macerator.
  • One form of macerator as shown, for example, in GB-A-1569672, includes first and second parallel contra rotating shafts, each having a plurality of alternate cutters and spacers of the same axial thickness, the cutters of the first shaft being interleaved with those of the second shaft.
  • Each cutter has a plurality of teeth arranged around its periphery and circumferentially spaced locations.
  • side rails Mounted adjacent to the cutters, on the side walls of the housing, are side rails which have radially inner surfaces which are arcuate and closely adjacent to the teeth of the cutters as they rotate. While this has proved to be reasonably satisfactory, the flow rate, particularly of a liquid-borne, in particular water-borne, material to be macerated is reduced rather severely because of the general blockage provided by the cutters and the side rails.
  • the ribs and slots are angled at between 15°and 45° with respect to the planes of the cutting discs.
  • the present invention there is provided a design of the side rails in which the ribs, and the slots therebetween, are angled relative to the planes of the cutter discs, whereby the cutter teeth of the cutter discs each pass in close proximity to a plurality of ribs.
  • the shafts While it is practical for the shafts to be mounted in any orientation, they are preferably mounted in a generally vertical plane.
  • the angling of the ribs and slots therebetween is such as to extend downwardly in the direction of flow, that is to say in the direction of peripheral movement of the cutters as they pass the side rail.
  • the side rail has a top wall and a bottom wall which extends substantially in the same plane as the uppermost and the lowermost of the cutting discs respectively and that rib or those ribs which would normally intersect the top and bottom walls are made shorter, at their upper and lower ends, to define "header channels" thereby ensuring that each of the angled slots has an inlet and an outlet.
  • each of the ribs is chamfered or bevelled at its free edge, the bevelling preferably extending downwardly at the free edge.
  • one of a pair of slotted side rails is indicated by the general reference numeral 2 and has a rear wall 4.
  • a plurality of ribs 6 of the side rail have corresponding slots 8 therebetween, the ribs having arcuate front edges 10.
  • the slots 8 and the ribs 6 are parallel to cutting elements 16 and 18 of the macerator shown in Figure 2. While Figure 2 only shows one side rail, there will be a mirror image side rail mounted on the other side with the ribs 6 in facing relation to the cutter discs 18.
  • the macerator 12 illustrated in Figure 2 has two drive shafts 14 upon which cutting elements 16 and 18 are mounted. Planar spacers 20 and 22 are mounted between the cutting discs and are of the same thickness as the cutting discs.
  • the discs 16, 18 are mounted opposite the ribs 6 and that the spacers 20, 22 are mounted opposite the slots 8. It will be appreciated that the cutting elements 16, 18 are spaced apart by the planar spaces 20, 22 respectively and these are fixedly mounted on the shaft 14.
  • the cutting elements 16 and 18 are interleaved and the teeth 24 of the cutting elements are in close proximity to the bases of the other stack and in close proximity to the front edges 10 of the ribs 6.
  • the ribs are aligned with the flow direction of liquid through the comminuting chamber and spaced to allow passage of liquid through the slots between the ribs. Liquid borne fine particles of solid material find passage through the slots 8 but the ribs prevent passage of larger pieces of unreduced material.
  • a side rail according to the present invention is indicated by the general reference numeral 30 in which it is shown on Figure 3, in an exploded perspective view of the rail and a macerator stack 42.
  • Angled ribs 32 formed in the side rail define slots 34, the ribs 32 ensuring that liquid borne solid material flowing through a slot crosses a plane of at least two cutting elements 44. Crossing the plane of several cutting elements increases the likelihood that a piece of solid material will contact the cutting elements 44 several times and be adequately reduced to a manageable particle side.
  • the angled ribs 32 present arcuately angled side rail surfaces 36 to the periphery of the macerator stack 42 which is mounted on shaft 40.
  • the cutters 44 of the macerator stack 42 are each spaced from their neighbour by a spacer 46 defined by the thickness of the spacers 52 as shown in Figure 4.
  • the angled ribs 32 are angled so that the surfaces 36 extend at an angle of between 15° and 45° to the planes of the cutting discs.
  • the angle may be varied with arc length of the angled side rails 30 to ensure that a maximum number of recesses will cross the plane of more than one cutting element 44.
  • a shorter arc length will require a steeper angle to ensure that sufficient crossings of the cutters and the ribs occurs, i.e. so that there are at least two and preferably several cutting planes.
  • each rib 32 is at least partly bevelled.
  • the bevelled front edges 38 allow for a smaller space between the front edge of the ribs and the periphery of the teeth of the cutting elements without increasing the likelihood that solid material will become lodged between the angled ribs and the cutting elements.
  • the shafts 40 are vertical, as shown, the bevelled front edges 38 are preferably bevelled downwardly which serves to channel solid material within the slot of a lower angled rib and into contact with the cutting element 44.
  • angled ribs 32 and angled slots 34 are shown in a partial sectional view of the macerator stack in phantom, positioned in an operation mode, with the angled ribs of the side rail being shown in full lines.
  • the angled ribs 32 along with the bevelled front edges 38 and the angled recesses 32 are shown differently in Figure 5 with the associated shaft 40 and macerator stack 42 along with cutting elements 44 and cutting teeth 48.
  • Figure 5 provides a view of the improved macerator of the invention, and shows the angled slots 34 that ensure liquid borne solid material passing through a slot crosses the plane of at least two cutting elements 44 and its cutting teeth 48. It can be seen that the upper and lower faces 30a and 30b of the side rails are chamfered.
  • each cutter of the stack is illustrated as having 5 circumferentially spaced teeth 48a, 48b, 48c, 48d and 48e. It can be seen that each tooth has a tip 49a, 49b, 49c, 49d and 49e respectively and a generally arcuate concave front face 50a, 50b, 50c, 50d and 50e.
  • the front face 50a and tip 49a extends substantially parallel to the axis of the cutter, so that it is essentially "square".
  • the front faces 50b and 50d are angled to one side of the axis of the cutter and the alternate front faces 50c and 50e are angled to the other side of the axis.
  • the rear faces 51 are inclined to provide a ramp like configuration and are each provided with serrations 52, the angle of the serrations being approximately 60°.
  • the rear faces 51 are arcuately convex between the serrations 52 and the tips 49.
  • the front faces 50b, 50c, 50d and 50e are inclined at approximately 30° to the axis in alternately opposite directions.
  • a good scissor action and it will be observed that the cutting action takes place only in the one direction of rotation. This is bound to make the cutter strong and not too prone to damage.
  • the one tooth 48a has a "square" cutting face and this improves the catchment of the solids and the drag of the item being macerated into the bank of cutters. Because the other teeth have alternate angles, this tends to equal out any side thrust and reduces the possibility of breakage.
  • angled ribs 32 and angled recesses 34 may be formed of cast metal these elements may be metal stamped or formed by other metallurgical processes. Rather than being unitary, the elements may be formed of component metal parts welded together but taking substantially the form shown.
  • the macerator with the angled ribs and slots is shown as having a generally rectangular housing which is transversely elongate, the housing could be generally cylindrical and the angle side rails and supporting wall could be semi-cylindrical in form.
  • the side rails 30, it will be seen, have concave arcuate front edges 36 the curvature of which conforms substantially to the curvature of the locus of the teeth 48 so that the angled ribs 32 are only spaced a short distance from the path of movement of the teeth 48.
  • the provision of the angled ribs and slots ensures a far better maceration and reduces the likelihood of larger, particularly sheet like solid material, bypassing the cutters.
  • the apparatus of the present invention is equally mountable in an open topped channel with the axis of the cutter stacks extending vertically and the side rails mounted on either side of the channel.
  • the structure of the present invention is designed particularly to deal with raw sewage, sewage cleaning and sludge maceration and can, as indicated, be used in a channel or in a pipeline. It is believed that the structure of the present invention can operate over a wide range of capacities. For example, a capacity of up to 500 cubic meters per hour having a throat size ranging from 300 mm to 1500 mm can be provided wherein various sizing of the apparatus is taken into consideration when determining the dimensions of the side rails according to the invention. Any size of apparatus can be supplied to operate in a vertical or horizontal orientation or in an intermediate position between the vertical and horizontal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Seal Device For Vehicle (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Secondary Cells (AREA)

Claims (15)

  1. Un désintégrateur comprenant une chambre de désintégration, des parois latérales de ladite chambre, un premier et un deuxième arbres parallèles tournant en sens inverses (14, 40) s'étendant à travers ladite chambre entre lesdites parois latérales, une pluralité de fraises (16, 18, 44) et d'entretoises (20, 22, 46) alternées de la même épaisseur axiale montées sur chacun desdits premier et deuxième arbres, les fraises du premier arbre étant interfoliées avec celles du deuxième arbre et portant au moins une dent (24, 48), chaque dent ayant une face frontale coupante (50), des rails latéraux (2, 30) associés avec chaque paroi latérale, chaque rail latéral comprenant une pluralité de nervures parallèles espacées (6, 32), les nervures formant entre elles des encoches (8, 34), des faces latérales (10, 36) desdites nervures en proximité rapprochée des dents sur les fraises quand les dents passent à côté, caractérisé en ce que les nervures parallèles (32) de chaque rail latéral sont inclinées à un angle aigu par rapport au plan des fraises de l'arbre adjacent.
  2. Un désintégrateur selon la revendication 1, caractérisé en ce que l'angle aigu est entre 15° et 45°.
  3. Un désintégrateur selon les revendications 1 ou 2, caractérise, en ce que les surfaces latérales radialement internes (36) des nervures (32) sont concaves par rapport à l'axe de rotation de l'arbre adjacent (40), les faces latérales concaves des nervures se conformant au chemin de déplacement des pointes des dents des fraises.
  4. Un désintégrateur selon la revendication 3 quand elle dépend de la revendication 2, caractérisé en ce que la longueur de la surface concave, telle que mesurée sur la circonférence de la fraise, est inversement proportionnelle à l'angle d'inclinaison.
  5. Un désintégrateur selon n'importe quelle revendication précédente, caractérisé en ce que les premier et deuxième arbres (40) sont montés verticalement et que les nervures (32) des rails latéraux sont inclinées en descendant dans la direction de mouvement des dents de fraises adjacentes.
  6. Un désintégrateur selon la revendication 5, caractérisé en ce que chaque rail latéral inclut une paroi supérieure (39) et une paroi inférieure (37), en ce que au moins quelques unes des encoches (34) s'ouvrent dans une surface latérale du rail latéral pour permettre le passage dans les encoches de matière sortant du rail, et en ce que la paroi supérieure (39) et la paroi inférieure (37) de chaque rail latéral sont espacées des bords supérieur et inférieur de celles des nervures inclinées qui ne s'étendent pas jusqu'au côté du rail latéral, fournissant ainsi un passage collecteur (35, 35a) pour la matière qui s'écoule dans les encoches qui y sont associées.
  7. Un désintégrateur selon n'importe quelle revendication précédente, caractérisé en ce que les bords libres des nervures sont biseautés (en 38).
  8. Un désintégrateur selon la revendication 7, caractérisé en ce que les premier et deuxième arbres (40) sont montés verticalement et les biseaux (38) sont formés sur les bords supérieurs des nervures.
  9. Un désintégrateur selon n'importe quelle revendication précédente, caractérisé en ce que chaque fraise (44) comprend plusieurs dents espacées circonférentiellement (50), chaque dent ayant une face arrière inclinée (51) en forme générale de rampe, et la face frontale (50a) d'au moins une dent s'étendant essentiellement parallèle à l'axe de la fraise et les faces frontales (50b-50d) de plusieurs des autres dents étant inclinées par rapport à l'axe de la fraise.
  10. Un désintégrateur selon n'importe quelle revendication précédente, caractérisé en ce que la chambre de désintégration comprend les parois latérales d'un canal.
  11. Un désintégrateur selon n'importe laquelle des revendications 1 à 9 caractérisé en ce que la chambre de désintégration comprend l'intérieur d'un carter qui a un orifice d'entrée et un orifice de sortie sur les côtés opposés de l'étranglement formé entre les fraises rotatives.
  12. Un rail latéral (2, 30) pour utilisation dans un désintégrateur ayant un premier et un deuxième arbres parallèles (14, 40), chaque arbre ayant une pluralité de fraises alternées (16, 18, 44) et d'entretoises (20, 22, 46) de la même épaisseur axiale, les fraises du premier arbre étant interfoliées avec celles du deuxième arbre, ledit rail latéral (2, 30) comprenant un corps de rail latéral (4, 30) ayant des surfaces parallèles supérieure et inférieure, une pluralité de nervures essentiellement parallèles (6, 32) en saillie dudit corps pour définir entre elles une pluralité d'encoches (8, 34), caractérisé en ce que lesdites nervures ont un bord libre courbé qui peut se positionner contre les fraises rotatives du désintégrateur, lesdites nervures étant inclinées à un angle aigu par rapport auxdites surfaces supérieure et inférieure pour définir entre elles des encoches inclinées.
  13. Un rail latéral selon la revendication 12, caractérisé en ce que l'angle aigu est entre 15° et 45°.
  14. Un rail latéral selon les revendications 12 ou 13, caractérisé en ce que les surfaces latérales radialement internes (36) des nervures (32), par rapport à l'axe de rotation de l'arbre adjacent (40), sont concaves, les faces latérales concaves des nervures se conformant au chemin de déplacement des pointes des dents des fraises.
  15. Un rail latéral selon la revendication 14 quand elle dépend de la revendication 13, caractérisé en ce que la longueur de la surface concave, telle que mesurée sur la circonférence de la fraise, est inversement proportionnelle à l'angle d'inclinaison.
EP92301537A 1991-09-09 1992-02-24 Désintégrateur Expired - Lifetime EP0532145B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9119258 1991-09-09
GB9119258A GB2259260A (en) 1991-09-09 1991-09-09 Macerator.

Publications (2)

Publication Number Publication Date
EP0532145A1 EP0532145A1 (fr) 1993-03-17
EP0532145B1 true EP0532145B1 (fr) 1995-07-26

Family

ID=10701142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92301537A Expired - Lifetime EP0532145B1 (fr) 1991-09-09 1992-02-24 Désintégrateur

Country Status (6)

Country Link
EP (1) EP0532145B1 (fr)
AT (1) ATE125469T1 (fr)
AU (1) AU649877B2 (fr)
DE (1) DE69203681T2 (fr)
ES (1) ES2074820T3 (fr)
GB (1) GB2259260A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9423623D0 (en) * 1994-11-23 1995-01-11 Mono Pumps Ltd Macerator
GB2297927A (en) * 1995-02-17 1996-08-21 Mono Pumps Ltd Macerator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1434360A (en) * 1919-04-18 1922-11-07 William F Bach Self-scouring crushing machine
DE1459459A1 (de) * 1963-12-07 1968-11-14 Condux Werk Zerkleinerer fuer Schlachtabfaelle und sonstige in Abwaessern enthaltene Schwimmstoffe
GB1569672A (en) * 1976-02-04 1980-06-18 Chambers J Solid waste comminutor
DE3041395A1 (de) * 1980-01-04 1981-07-09 Disposable Waste Systems, Inc., Santa Ana, Calif. Schneidmesser fuer einen feststoff-abfallzerkleinerer
US4702422A (en) * 1986-09-19 1987-10-27 Disposable Waste Systems, Inc. Solid waste comminutor with slotted slide rails and side rails for same
GB2243561B (en) * 1990-04-30 1993-05-19 Mono Pumps Ltd Macerating machine

Also Published As

Publication number Publication date
AU2280292A (en) 1993-03-11
ATE125469T1 (de) 1995-08-15
AU649877B2 (en) 1994-06-02
DE69203681D1 (de) 1995-08-31
ES2074820T3 (es) 1995-09-16
EP0532145A1 (fr) 1993-03-17
GB2259260A (en) 1993-03-10
DE69203681T2 (de) 1996-01-11
GB9119258D0 (en) 1991-10-23

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