EP4046788A1 - Presse - Google Patents

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Publication number
EP4046788A1
EP4046788A1 EP21158101.2A EP21158101A EP4046788A1 EP 4046788 A1 EP4046788 A1 EP 4046788A1 EP 21158101 A EP21158101 A EP 21158101A EP 4046788 A1 EP4046788 A1 EP 4046788A1
Authority
EP
European Patent Office
Prior art keywords
chamber
shaft
pressing
holes
lateral surface
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
EP21158101.2A
Other languages
German (de)
English (en)
Other versions
EP4046788B1 (fr
Inventor
Ermanno Prati
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.)
Babbini SpA
Original Assignee
Babbini SpA
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 Babbini SpA filed Critical Babbini SpA
Priority to EP21158101.2A priority Critical patent/EP4046788B1/fr
Publication of EP4046788A1 publication Critical patent/EP4046788A1/fr
Application granted granted Critical
Publication of EP4046788B1 publication Critical patent/EP4046788B1/fr
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    • 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
    • B30B9/121—Screw constructions
    • 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
    • B30B9/16—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 operating with two or more screws or worms

Definitions

  • the present invention relates to a pressing apparatus, for the removal of water and other liquids from agroalimentary products, industrial processing waste and other material of various kinds.
  • each screw feeder comprises a rotating shaft about which a sort of helicoid is wound: the material to be pressed is introduced in the chamber at a terminal portion of the screw feeders and is pushed to the opposite end by the helicoids, until it exits from a discharge opening provided at the opposite end.
  • the material to be pressed is introduced in the chamber at a terminal portion of the screw feeders and is pushed to the opposite end by the helicoids, until it exits from a discharge opening provided at the opposite end.
  • the material is forced to pass through progressively decreasing passage sections (formed between the screw feeders and the walls that delimit said chamber) and is indeed pressed.
  • the shaft in fact typically has a central body around which perforated cylindrical or conical metal plates are arranged which are intended for contact with the material to be pressed: channels form between the body and the plates, receive the extracted water and allow to evacuate it separately.
  • each hole having a variable diameter
  • the portion of the perforated metal plates on which the helicoid is welded is easily subject to cracks, which, due to the stresses to which the shaft is subjected during operation, over time grow and propagate until they cause the failure of the shaft itself.
  • the aim of the present invention is to solve the problems described above, providing a pressing apparatus that ensures an optimum draining capacity and is at the same time reliable over time.
  • an object of the invention is to provide a pressing apparatus capable of preventing and avoiding effectively the clogging of the passage sections intended for the evacuation of water and other liquids.
  • Another object of the invention is to provide an apparatus in which the elements designed for the movement and pressing of the material of interest are mechanically strong, with no risk of failures or cracks.
  • Another object of the invention is to propose a pressing apparatus that adopts a technical and structural architecture that is alternative to those of presses of the known type.
  • Another object of the invention is to provide a pressing apparatus that can be obtained easily starting from commonly commercially available elements and materials.
  • Another object of the invention is to provide a pressing apparatus that is simple to provide in practice, has low costs and is safe in application.
  • a pressing apparatus for the removal of liquids from material of various kinds, comprising a pressing chamber, provided with at least one intake opening for the material to be pressed and with at least one discharge opening for the pressed material, and at least one rotating screw feeder, which is accommodated in said chamber and comprises a shaft and a helicoid which is stably wound around said shaft, which delimit, together with said chamber, a path with a progressively decreasing cross-section for the forced movement of the material, pushed by the action of said screw feeder from said intake opening toward said discharge opening, characterized in that said shaft comprises at least one at least partially hollow tubular body which has, along its own lateral surface, a plurality of first passage holes for the liquids extracted by pressing from the material, and at least one additional filtering screen, which is applied externally to at least one fraction of said lateral surface of said body and has a plurality of second passage holes for the liquids extracted by pressing from the material, which have a diameter that is
  • the reference numeral 1 generally designates a pressing apparatus for the removal of liquids from material of various kinds.
  • the material from which liquids are extracted by means of the apparatus 1 is constituted by agroalimentary products of various kinds, which are indeed supplied to the apparatus 1 impregnated with water (the liquid to be removed) as a result of previous industrial processes.
  • the apparatus 1 finds its particularities (described hereinafter) enhanced in the sugar sector, in which the treated material is beet pulp (or also leaves or other complementary substances).
  • the apparatus 1 is used to remove water or other liquids from other agroalimentary products or byproducts (fishmeal, alfalfa, meat processing waste, etc.), as well as from waste, biomasses, raw materials and intermediate products in the alternative energy sector or others still, without thereby abandoning the protective scope claimed herein.
  • agroalimentary products or byproducts fishmeal, alfalfa, meat processing waste, etc.
  • the liquid to be removed is preferably water
  • the protection claimed herein is to be understood as extended to the use of the assembly 1 also for the removal (by pressing and therefore expression) various solutions or different liquids as a function of the specific practical requirements.
  • the apparatus 1 comprises a pressing chamber 2, which is provided with at least one intake opening 3 for the material to be pressed and with at least one discharge opening 4 for the pressed material (the regions that corresponds to the intake and the discharge are designated schematically by the reference numerals 3 and 4 in Figure 1 , but the shape and arrangement may be any).
  • the apparatus 1 comprises at least one rotating screw feeder 5, which is accommodated in the chamber 2 and comprises in turn a shaft 6 and a helicoid 7 which is stably wound around the shaft 6 (in practice, the helicoid 7 is the thread of the screw to which the screw feeder 5 can be likened).
  • the openings 3, 4 can be simple nozzles or apertures of various kinds, provided in any case along the chamber 2 and preferably (but not exclusively) facing end regions of the screw feeder 5, so as to define a path that substantially extends along the entirety of said screw feeder 5, maximally enhancing the capacities for pressing and expressing the material.
  • the screw feeder 5 pushes the material along the forced path, imposing on it a progressively decreasing useful volume (by sizing and shaping appropriately the screw feeder 5 and the chamber 2), on at least one portion of adequate length of the screw feeder 5. This indeed allows to obtain the desired pressing/expression of the material and therefore the removal of at least part of the water (or other liquids) contained therein.
  • the apparatus 1 operates in traditional manners, which are well known to the person skilled in the art and which will not be dwelt upon further.
  • the shaft 6 comprises at least one tubular body 8 which is at least partially hollow.
  • the body 8 has, along its lateral surface, a plurality of first (through) passage holes 9 for the liquids extracted by pressing from the material.
  • the shaft 6 comprises at least one additional filtering screen 10; the screen 10 is applied externally on at least one fraction of the lateral surface of the body 8 and has a plurality of second (through) passage holes 11 for the liquids extracted by pressing from the material.
  • the second holes 11 have a diameter that is smaller than the diameter of the first holes 9.
  • the water (or other liquid) extracted from the pressed material can thus be evacuated from the chamber 2 by virtue of the holes 9, 11: in greater detail, the liquid abandons the area reserved for the transit of the material by passing in sequence first through the second holes 11 of the screen 10 and then through the first holes 9 of the body 8, ending inside the latter.
  • the internal compartment of the body 8 (which will be discussed again later) can in turn be connected to the outside for the permanent evacuation of the liquid, independently and even on the opposite side with respect to the discharge opening 4, which is instead intended for the discharge of the material that by then has been expressed.
  • the apparatus 1 comprises two screw feeders 5, which are accommodated in the chamber 2 and rotate about respective longitudinal axes A which are mutually parallel.
  • said screw feeders 5 are arranged at the same vertical height (at the same height from the ground when the apparatus 1 is in use). It is specified in any case that the apparatus 1 can provide any number of screw feeders 5, arranged with an axis A that is vertical, horizontal or other, and in any mutual arrangement.
  • the respective helicoids 7 can be simply arranged side by side or arranged so that during the rotation the turns of one helicoid enter and exit at least partially between the turns of the other.
  • the path available to the material during pressing is preferably defined by the space comprised between the two screw feeders 5 and the (common) chamber 2.
  • apparatuses 1 provided with two (or more) chambers 2, each of which accommodates one or more screw feeders 5.
  • the tubular body 8 has a circular transverse cross-section (correspondingly, the screen 10 also assumes a similar shape).
  • the shaft 6 has a double layer structure, wherein the two layers (which are superimposed but provided separately) are indeed constituted by the body 8 and by the screen 10.
  • the helicoid 7 is wound around the body 8 at a continuous helicoid portion 8a of the lateral surface of the latter, without first holes 9.
  • the lateral surface of the body 8 is not affected uniformly and integrally by the first holes 9.
  • it is ideally divided into at least two mutually complementary portions 8a, 8b, which extend with a helicoid shape around the longitudinal axis A and which together indeed form the entire lateral surface (or at least a main portion thereof).
  • the two portions 8a, 8b it is possible to obtain both the desired evacuation of the water through the first holes 9 (at the perforated portion 8b) and, simultaneously, a high mechanical strength of the screw feeder 5, since the helicoid 7 is fixed to the shaft 6 at a non-perforated continuous area which is indeed constituted by the continuous helicoid portion 8a.
  • the perforated portion 8b substantially corresponds to the entire useful area of the body 8, which is interposed between the turns of the helicoid 7 and faces (albeit with the interposition of the screen 10) the path reserved to the material to be pressed. Draining efficiency is therefore kept maximum.
  • the helicoid 7 is welded to the shaft 6 (although other coupling methods are not excluded), preferably indeed at the lateral surface of the body 8 (and even more preferably, as shown, at the continuous helicoid portion 8a).
  • the lateral surface of the body 8 has a greater thickness than the screen 10. This choice turns out to be of particular interest if one indeed chooses to couple the helicoid 7 (by welding or in other manners) on the body 8, since the increased thickness ensures high mechanical strength and a greater capacity to withstand the mechanical stresses, but can be adopted also in other configurations.
  • the shaft 6 has a substantially frustum-like shape, with a progressively increasing transverse cross-section from the intake opening 3 to the discharge opening 4 (this progression is clearly visible in Figure 1 ).
  • the chamber 2 has a transverse cross-section which is constant or in turn increases or decreases (the transverse cross-section is the one that is obtained with a sectional plane that is perpendicular to the axis A).
  • the protective scope claimed herein includes any shape or contour of the screw feeder 5 and of the chamber 2.
  • the screw feeder 5 comprises an axial stem 12, which is accommodated coaxially within the body 8, so as to form (between the body 8 and said stem 12), at least one interspace 13, which can be crossed by the liquids removed from the material introduced in the chamber 2.
  • the water extracted from the material therefore collects within the interspace 13, after passing through the second holes 11 and then the first holes 9. From the interspace 13, the water is then evacuated externally through appropriate drains adequately provided in the apparatus 1.
  • the stem 12 has a polygonal transverse cross-section; furthermore, respective longitudinal crests 14 protrude externally from the lateral edges of the stem 12 and define respective resting bases for the body 8.
  • the tubular body 8 comprises (or is constituted by) a plurality of cylindrical or conical tubular modules, each of which has respective first holes 9; the modules are coaxially aligned and are mutually fixed in pairs along respective end margins.
  • the possibility is provided not only to provide the body 8 as a monoblock but also to obtain it by assembling in sequence a plurality of coaxially aligned tubular modules (each of which, evidently smaller in longitudinal dimensions than the entire body 8 and therefore easier to provide in practice).
  • the screen 10 comprises (or is constituted by) a plurality of curved panels, each of which has the second holes 11; the panels are applied externally on respective parts of the lateral surface of the body 8.
  • the chamber 2 is provided with at least partially perforated boundary walls (so as to indeed form openings through which the liquids extracted from the material, in cooperation with the holes 9, 11, are made to flow out).
  • the operation of the pressing apparatus according to the invention is as follows.
  • the material to be pressed can be introduced in the chamber 2 through the intake opening 3, thus being forced by the screw feeder 5 to pass through a forced path which is delimited by the latter and by said chamber 2.
  • the liquid progressively removed can thus abandon the area reserved for the path of the material and then the chamber 2 (as well as through any openings in the boundary walls of the latter) by passing through said shaft 6 of the screw feeder 5, which as shown has a particular configuration with two superimposed layers (preferably made of metal plate), both of which are perforated and constituted respectively by the (internal) tubular body 8 and by the (external) screen 10.
  • the liquid abandons the area reserved to the material in transit by passing in sequence through the second holes 11 of the screen 10 and therefore the first holes 9 of the body 8, thus ending inside the shaft 6 (preferably in the interspace 13), from which it can then be evacuated independently of the material.
  • Said structure in fact ensures (with respect to known solutions) a greater performance of the pressing action (in particular in terms of greater draining capacity) and a smaller (or no) risk of clogging of the holes 9, 11 (due to pulp residues, material being processed, sand or other debris).
  • a reduction or the elimination of the risk of clogging is noted also in the compartment inside the shaft 6 assigned to water evacuation (whether constituted by the interspace 13 or other), by virtue of the double-layer structure and of the double holes 9, 11 that the water crosses.
  • a shaft 6 according to the invention ensures the preservation over time of a high draining capacity, far greater than traditional draining shafts, provided with monoblock metal plates, which instead over time become clogged due to the presence of pulp slurry or material being pressed and sand.
  • the apparatus 1 fully achieves the intended aim and objects, since the double-layer structure of the shaft 6 allows to obtain an apparatus 1 that ensures an optimum draining capacity, turning out to be at the same time reliable over time.
  • Said apparatus 1 is indeed capable of preventing and avoiding in an effective manner the clogging of the passage sections (the holes 9, 11, and also the interspace 13 or in any case the compartment inside the shaft 6) intended for the evacuation of water and other liquids.
  • the structure with double perforated layer (not monoblock) can be provided in a constructively simple and easy manner, requiring processes which are more practical and economical to provide with respect to solutions that resort to a monoblock shaft in which holes with variable cross-section are provided.
  • the invention therefore, it is possible to provide an apparatus 1 that is simple to provide in practice, has low costs and is safe in application.
  • the invention also ensures high mechanical strength, overcoming the problems of the background art, in which by welding the helicoids on entirely perforated metal plates the onset of cracks (at the root of the helicoid, where indeed a weakening of the strength occurred) and consequent failures of the shaft was facilitated.
  • the only partial perforation of the body 8 ensures that in the apparatus 1 according to the invention the elements intended for movement and pressing of the material of interest are mechanically strong, with no risk of failures or cracking.
  • the screw feeder 5 can be provided by preparing first of all the body 8 with the stem 12 inside it (and therefore defining the water discharge interspace 13). As shown, the body 8 can be obtained in a particularly easy manner by aligning and fixing to each other a plurality of tubular modules.
  • the body 8 be it monoblock or composed of multiple modules, provides for a perforated portion 8b and a continuous portion 8a (which is helicoid and complementary to the first one): the helicoid 7 can thus be welded onto the continuous portion 8a.
  • the assembly of the screw feeder 5 is completed by applying to the body 8 (on the perforated portion 8b, between the turns of the helicoid 7) the screen 10, which is preferably composed in turn of a plurality of panels.
  • the materials used, as well as the dimensions, may be any according to the requirements and the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
EP21158101.2A 2021-02-19 2021-02-19 Presse Active EP4046788B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21158101.2A EP4046788B1 (fr) 2021-02-19 2021-02-19 Presse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21158101.2A EP4046788B1 (fr) 2021-02-19 2021-02-19 Presse

Publications (2)

Publication Number Publication Date
EP4046788A1 true EP4046788A1 (fr) 2022-08-24
EP4046788B1 EP4046788B1 (fr) 2024-05-29

Family

ID=75339389

Family Applications (1)

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EP21158101.2A Active EP4046788B1 (fr) 2021-02-19 2021-02-19 Presse

Country Status (1)

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EP (1) EP4046788B1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1303397A (fr) * 1960-10-15 1962-09-07 Weigelwerk G M B H Filtre-presse à vis
JPS59113997A (ja) * 1982-12-17 1984-06-30 Masakatsu Ozawa スクリユウプレス
JPS60111798A (ja) * 1983-11-22 1985-06-18 Masakatsu Ozawa スクリユウプレス
EP0565714A1 (fr) * 1991-09-24 1993-10-20 Ishigaki Mechanical Industry Co. Ltd. Presse a vis
CN2303867Y (zh) * 1997-08-22 1999-01-13 苏继民 空心螺旋挤压真空抽滤装置
EP0930152A1 (fr) * 1998-01-15 1999-07-21 Lionello Babbini Presse à vis pour la déshydratation de produits humides
CN201325189Y (zh) * 2008-12-11 2009-10-14 何全民 一种挤压式脱水机
KR101437908B1 (ko) * 2013-04-17 2014-09-04 김혜안 물과 응집 슬러지의 비중 차이를 이용한 수직형 스크류 탈수기
KR20170050746A (ko) * 2015-10-30 2017-05-11 임병천 스크류축에 여과기능을 구비한 저동력 저탄소 스크류 프레스
EP3228444A1 (fr) * 2016-04-04 2017-10-11 Babbini S.P.A. Unité de compression servant à éliminer des liquides
CN207240943U (zh) * 2017-08-08 2018-04-17 河北国惠环保科技有限公司 一种高效螺旋挤压脱水机

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1303397A (fr) * 1960-10-15 1962-09-07 Weigelwerk G M B H Filtre-presse à vis
JPS59113997A (ja) * 1982-12-17 1984-06-30 Masakatsu Ozawa スクリユウプレス
JPS60111798A (ja) * 1983-11-22 1985-06-18 Masakatsu Ozawa スクリユウプレス
EP0565714A1 (fr) * 1991-09-24 1993-10-20 Ishigaki Mechanical Industry Co. Ltd. Presse a vis
CN2303867Y (zh) * 1997-08-22 1999-01-13 苏继民 空心螺旋挤压真空抽滤装置
EP0930152A1 (fr) * 1998-01-15 1999-07-21 Lionello Babbini Presse à vis pour la déshydratation de produits humides
CN201325189Y (zh) * 2008-12-11 2009-10-14 何全民 一种挤压式脱水机
KR101437908B1 (ko) * 2013-04-17 2014-09-04 김혜안 물과 응집 슬러지의 비중 차이를 이용한 수직형 스크류 탈수기
KR20170050746A (ko) * 2015-10-30 2017-05-11 임병천 스크류축에 여과기능을 구비한 저동력 저탄소 스크류 프레스
EP3228444A1 (fr) * 2016-04-04 2017-10-11 Babbini S.P.A. Unité de compression servant à éliminer des liquides
CN207240943U (zh) * 2017-08-08 2018-04-17 河北国惠环保科技有限公司 一种高效螺旋挤压脱水机

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Publication number Publication date
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