WO2018033192A1 - Système de contre-pression pour une presse à vis à contre-pression réglée automatiquement et presse à vis comprenant un tel système de contre-pression - Google Patents

Système de contre-pression pour une presse à vis à contre-pression réglée automatiquement et presse à vis comprenant un tel système de contre-pression Download PDF

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Publication number
WO2018033192A1
WO2018033192A1 PCT/DK2017/050265 DK2017050265W WO2018033192A1 WO 2018033192 A1 WO2018033192 A1 WO 2018033192A1 DK 2017050265 W DK2017050265 W DK 2017050265W WO 2018033192 A1 WO2018033192 A1 WO 2018033192A1
Authority
WO
WIPO (PCT)
Prior art keywords
counter pressure
pressure system
screw
counter
press
Prior art date
Application number
PCT/DK2017/050265
Other languages
English (en)
Inventor
Søren ROSSEN BECH
Original Assignee
Runi A/S
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 Runi A/S filed Critical Runi A/S
Publication of WO2018033192A1 publication Critical patent/WO2018033192A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3025—Extrusion chambers with adjustable outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/18—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing with means for adjusting the outlet for the solid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3089—Extrusion presses

Definitions

  • the present invention relates to a counter pressure system for a screw press for compaction of solid materials, such as for instance reusable waste products, and to a screw press comprising such a counter pressure system.
  • the present invention relates to a counter pressure system for a screw press for compaction of materials, such as for instance reusable waste products, which counter pressure comprises at least one moveable pressure jaw, the position of which determines the size of an opening through the counter pressure system through which the compacted material passes, wherein the counter pressure system is arranged so that the size of the opening and, thereby, the counter pressure exerted by the counter pressure system onto the material passing through it is automatically adjusted depending on the forward pressure exerted onto the material entering the counter pressure system by a press screw of a screw press, of which the counter pressure system forms part, and wherein the counter pressure adjustment is either a passive adjustment directly and mechanically depending on the forward pressure exerted by the press screw or an active adjustment based on a measurement of the forward pressure exerted by the press screw.
  • Counter pressure systems with counter pressure adjustment configured as in the present invention are advantageous, because the regulation of the counter pressure depends directly on the forward pressure exerted by the press screw onto the material to be compacted.
  • the counter pressure system is arranged so that, when the forward pressure exerted by the press screw exceeds a certain predefined level, the counter pressure system moves away from the remaining parts of the screw press in the axial direction of the press screw, and the position of the at least one pressure jaw changes in a direction increasing the size of the opening through the counter pressure system, whereby the counter pressure exerted by the at least one pressure jaw and thereby also the forward pressure exerted by the press screw is reduced and the counter pressure system moves back towards the remaining parts of the screw press again.
  • the position of the counter pressure system relatively to the remaining parts of the screw press is mechanically controlled at least partly by means of one or more springs with spring bolts fixed at one end to the remaining parts of the screw press, which springs and spring bolts are arranged so that, when the counter pressure system is in its position closest to the remaining parts of the screw press, the springs are in their most expanded position defining the predefined pressure level above which the counter pressure system moves away from the remaining parts of the screw press and, the position of the counter pressure system furthest away from the remaining parts of the screw press being defined by a mechanical stop.
  • the position of the counter pressure system relatively to the remaining parts of the screw press is controlled at least partly by means of one or more hydraulic cylinders connected to a hydraulic accumulator in such a way that the hydraulic cylinders and the hydraulic accumulator together work as a hydraulic spring, the predefined pressure level above which the counter pressure system moves away from the remaining parts of the screw press being defined by an air pressure within the hydraulic accumulator when the counter pressure system is in its position closest to the remaining parts of the screw press.
  • the counter pressure system is supported by a support tower, the position relatively to the remaining parts of the screw press is fixed, and wherein the pressure jaw is rotatably connected to the remaining parts of the counter pressure system at one end and rotatably connected to a guide bar at the other end, and the guide bar is also rotatably connected to the support tower in such a way that, when the counter pressure system moves relatively to the support tower in a direction away from the remaining parts of the screw press, the guide bar forces the position of the pressure jaw to change in a direction increasing the size of the opening through the counter pressure system, and when the counter pressure system moves relatively to the support tower in a direction towards the remaining parts of the screw press, the guide bar forces the position of the pressure jaw to change in a direction narrowing the opening through the counter pressure system.
  • the length of the guide bar is made variable, for instance through insertion of a spring load or a controlled actuator between its two connection points.
  • the position of the at least one pressure jaw is controlled by one or more hydraulic jaw cylinders arranged between the one or more hydraulic cylinders controlling the position of the counter pressure system relatively to the remaining parts of the screw and the hydraulic accumulator in such a way that, when the counter pressure system moves away from the remaining parts of the screw press, hydraulic oil moves between the one or more hydraulic cylinders controlling the position of the counter pressure system and the one or more hydraulic jaw cylinders causing the position of the pressure jaw to change in a direction increasing the size of the opening through the counter pressure system, and when the counter pressure system moves towards the remaining parts of the screw press, hydraulic oil moves between the one or more hydraulic cylinders controlling the position of the counter pressure system and the one or more hydraulic jaw cylinders in the opposite direction causing the position of the pressure jaw to change in a direction narrowing the opening through the counter pressure system.
  • This embodiment combines the well-known and reliable use of hydraulic cylinders for controlling the position of pressure jaws with the above-described use of hydrauli c springs for controlling the position of the counter pressure system relatively to the remaining parts of the screw press.
  • the counter pressure system further comprises one or more pressure sensors arranged to measure the pressure exerted onto the material entering the counter pressure system by the press screw and to send signals representative of the magnitude of the exerted pressure to one or more power sources, such as hydraulic cylinders, pneumatic cylinders or electric actuators, which power sources are arranged to control the position of the at least one pressure jaw depending on the received signals in accordance with predefined dependencies between the measured exerted pressures and the position of the at least one pressure jaws.
  • power sources such as hydraulic cylinders, pneumatic cylinders or electric actuators
  • This embodiment requires electronic control but reduces the number of moving parts, because the counter pressure system is stationary relatively to the remaining parts of the screw press.
  • a screw press for compaction of materials such as for instance reusable waste products, comprising a counter pressure system as described above.
  • Fig. 1 is a partly cross-sectional view of a screw press according to an
  • Fig. 2 is a perspective view of a counter pressure system for a screw press according to an embodiment of the invention
  • Fig. 3a is a cross-sectional view of the counter pressure system shown in Fig. 2 in a fully contracted position
  • Fig. 3b is a cross-sectional view of the same counter pressure system in a fully expanded position.
  • Fig. 1 is a partly cross-sectional view of a screw press 1 according to an embodiment of the invention.
  • the material to be compacted is filled into a hopper 3, from which it passes through a conical connection part 5 into a counter pressure system 6 before leaving the screw press I in compacted form.
  • the connection part between the hopper 3 and the counter pressure system 6 may not be conical.
  • An auger 4 within the hopper 3 and a press screw 7 within the conical connection part 5 extending partly into the counter pressure system 6 is mounted on a common shaft for being rotated by an electric motor 2.
  • the auger 4 moves the material to be compacted from the hopper 3 to the conical connection part 5 and the press screw 7 presses the material through the conical connection part 5 and further into the counter pressure system 6, in which a moveable pressure jaw 8 is used to vary the opening of the passage through the counter pressure system 6 and, thereby, the counter pressure exerted onto the material and the degree to which the material is compacted.
  • Fig. 2 is a perspective view of a counter pressure system 6 for a screw press 1 according to an embodiment of the invention.
  • the counter pressure system 6 is supported by a support tower 9, the position of which is fixed relatively to the remaining parts of the screw press 1 (not shown in this figure), whereas the counter pressure system 6 is moveable relatively to the remaining parts of the screw press 1.
  • Two spri ng bolts 12 are fixed at one end to the remai ning parts of the screw press 1 (typically to a conical connection part 5 as illustrated in Fig. 1).
  • the counter pressure system 6 can slide along the spring bolts 12 depending on the forward pressure exerted by the press screw 7 shown in Fig. 1 onto the material being compacted and, thereby, onto the counter pressure system 6.
  • FIGS. 3a and 3b are cross-sectional views of the same counter pressure system 6 illustrating schematically the function thereof.
  • the counter pressure system 6 is in a fully contracted position, i .e. in the position closest possible to the conical connection part 5 of the screw press 1.
  • the compression of the springs 12 in this position determines the pressure level above which the counter pressure system 6 will start moving away from the conical connection part 5.
  • the pressure jaw 8 is in the position narrowing the opening of the passage through the counter pressure system 6 as much as possible, thereby exerting maximum counter pressure onto the material passing through the counter pressure system 6.
  • the counter pressure system 6 is in a fully expanded position, i.e. the position furthest away from the conical connection part 5 of the screw press 1. This position i s reached when the counter pressure system 6 reaches a mechanical stop (not shown).
  • the axial motion of the counter pressure system 6 relatively to the remaining parts of the screw press 1 including the support tower 9 has caused the guide bar 10 to rotate into a more horizontal position thereby lifting the pressure jaw 8 and increasing the size of the opening of the passage through the counter pressure system 6.
  • the increased size of the opening reduces the counter pressure exerted onto the material passing through the counter pressure system 6 and, thereby, the pressure exerted by the press screw 7 onto the material for pushing it through.
  • This causes the counter pressure system 6 to move back towards the remaining parts of the screw press 1, thereby causing the pressure jaw 8 to rotate and narrow the opening through the counter pressure system 6.
  • an increase of the forward pressure exerted by the press screw 7 immediately results in a reduction of the counter pressures exerted by the counter pressure system 6 and vice versa, and a direct and reliable regulation of the pressure exerted by the press screw 7 is obtained.
  • the springs 1 1 and spring bolts 12 may be replaced by on ore more hydraulic cylinders, which are pushed in or out when the counter pressure system 6 moves relatively to the remaining parts of the screw press 1 .
  • the displaced hydraulic oil is conducted in hoses to an air-filled hydraulic accumulator, the air pressure within which determined the pressure level above which the counter pressure system 6 starts to move.
  • one or more hydraulic jaw cylinders are arranged between the hydraulic cylinders controlling the position of the counter pressure system 6 and the hydraulic accumulator in a so-called master-slave configuration so that a movement of the counter pressure system 6 causes hydraulic oil to be displaced between the hydraulic cylinders so that this motion is directly connected to a movement of the pressure jaw 8.
  • one hydraulic port of a hydraulic jaw cylinder is connected to a hydraulic port of a hydraulic cylinder controlling the position of the counter pressure system, whereas the other hydraulic port of the hydraulic jaw cylinder is connected to the hydraulic accumulator, which ensures a hydraulic spring function for both the hydraulic jaw cylinders and the hydraulic cylinders controlling the position of the counter pressure system 6.
  • inventions include electronic control of one or more power sources, for instance in the form of hydraulic cylinders, pneumatic cylinders or electric actuators, regulating the position of the one or more pressure jaws 8, on the basis of electric signals representing the forward pressure exerted by the press screw 1 onto the material to be compacted.
  • This pressure may, for instance, be measured by one or more pressure sensors arranged between the counter pressure system 6 and the remaining parts of the screw press 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

L'invention concerne un système de contre-pression (6) pour une presse à vis (1) servant au compactage de matériaux, comme par exemple des déchets réutilisables. Le système de contre-pression comprend au moins une mâchoire de pression mobile (8), dont la position détermine la taille d'une ouverture à travers le système de contre-pression à travers lequel passe le matériau compacté. Le système de contre-pression est disposé de telle sorte que la taille de l'ouverture et, par conséquent, la contre-pression exercée par le système de contre-pression sur le matériau qui passe à travers celui-ci est automatiquement ajustée en fonction de la pression directe exercée sur le matériau entrant dans le système de contre-pression par une vis de pression (7) de la presse à vis, dont fait partie le système de contre-pression. L'ajustement est soit un ajustement passif qui dépend directement et mécaniquement de la pression exercée par la vis de pression, soit un ajustement actif basé sur une mesure de la même pression.
PCT/DK2017/050265 2016-08-17 2017-08-16 Système de contre-pression pour une presse à vis à contre-pression réglée automatiquement et presse à vis comprenant un tel système de contre-pression WO2018033192A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201670631 2016-08-17
DKPA201670631A DK201670631A1 (en) 2016-08-17 2016-08-17 A counter pressure system for a screw press with automatically adjusted counter pressure and a screw press comprising such a counter pressure system

Publications (1)

Publication Number Publication Date
WO2018033192A1 true WO2018033192A1 (fr) 2018-02-22

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Family Applications (1)

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PCT/DK2017/050265 WO2018033192A1 (fr) 2016-08-17 2017-08-16 Système de contre-pression pour une presse à vis à contre-pression réglée automatiquement et presse à vis comprenant un tel système de contre-pression

Country Status (2)

Country Link
DK (1) DK201670631A1 (fr)
WO (1) WO2018033192A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022175887A1 (fr) * 2021-02-19 2022-08-25 Shark Containers A/S Compacteur et procédé de compactage de déchets en un bloc en fonction de la température et de la dureté

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1275477A (fr) * 1960-09-28 1961-11-10 A Blachere & Ses Fils Ets Pressoir continu à alimentation indépendante
GB1170315A (en) * 1967-03-02 1969-11-12 Stork & Co Nv Improvements in and relating to a Low Pressure Fruit Press, particularly for Oil Palm Fruits
US4709628A (en) * 1985-05-10 1987-12-01 Tad Glowacki Screw press for dewatering sludge and fiber suspensions
US5012731A (en) * 1985-06-26 1991-05-07 Yves Maisonneuve Device for pressing heterogeneous mixtures with regulated pressing force for separating liquid and solid fractions thereof, in particular fruit juices
WO2007057293A1 (fr) * 2005-11-15 2007-05-24 C.M.S. S.P.A. Appareil de reglage automatique des moyens d'obturation positionnes sur l'ouverture d'evacuation des presses a vis

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US3989433A (en) * 1974-11-18 1976-11-02 General Electric Company Apparatus for controlling resistance to extrusion of a rod-like body through a die
US4049390A (en) * 1974-11-18 1977-09-20 General Electric Company Method for extrusion of coal containing body
DE4041541A1 (de) * 1990-12-22 1992-06-25 Fan Engineering Gmbh Vorrichtung zur geregelten pfropfenentwaesserung in pressschneckenseparatoren
GB2306132B (en) * 1992-09-26 1997-06-25 Marshall Spv Ltd Compaction methods and apparatus
AU681596B2 (en) * 1992-09-26 1997-09-04 Robin Hamilton Compaction methods and apparatus
DE4232449B4 (de) * 1992-09-28 2005-06-23 Fan Separator Gmbh Preßschneckenseparator mit Ausstoßregler
DK9500220U3 (da) * 1995-06-06 1995-07-28 Kristensen Niels Dysager Regulerbar holdeanordning til sneglekomprimator
EP1631446A4 (fr) * 2003-01-29 2008-12-03 Kurt Mfg Co Inc Appareil de compactage de materiaux
DE202005014151U1 (de) * 2005-09-07 2007-01-18 Strautmann Maschinenbau Gmbh Schneckenpresse
WO2013033770A1 (fr) * 2011-09-06 2013-03-14 Anaeco Limited Procédé et appareil d'assèchement
AU2014360603A1 (en) * 2013-12-05 2016-06-09 Greenfield Specialty Alcohols Inc. Backpressure control for solid/fluid separation apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1275477A (fr) * 1960-09-28 1961-11-10 A Blachere & Ses Fils Ets Pressoir continu à alimentation indépendante
GB1170315A (en) * 1967-03-02 1969-11-12 Stork & Co Nv Improvements in and relating to a Low Pressure Fruit Press, particularly for Oil Palm Fruits
US4709628A (en) * 1985-05-10 1987-12-01 Tad Glowacki Screw press for dewatering sludge and fiber suspensions
US5012731A (en) * 1985-06-26 1991-05-07 Yves Maisonneuve Device for pressing heterogeneous mixtures with regulated pressing force for separating liquid and solid fractions thereof, in particular fruit juices
WO2007057293A1 (fr) * 2005-11-15 2007-05-24 C.M.S. S.P.A. Appareil de reglage automatique des moyens d'obturation positionnes sur l'ouverture d'evacuation des presses a vis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022175887A1 (fr) * 2021-02-19 2022-08-25 Shark Containers A/S Compacteur et procédé de compactage de déchets en un bloc en fonction de la température et de la dureté

Also Published As

Publication number Publication date
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