Classifications

• • 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
  • B30B9/26—Permeable casings or strainers
  • B30B9/262—Permeable casings or strainers means disposed in the casing facilitating the squeezing-out of liquid
• • 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
  • B30B9/04—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 press rams
  • B30B9/047—Control arrangements
• • 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
  • B30B9/04—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 press rams
  • B30B9/08—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 press rams co-operating with a rotary casing
• • 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
  • B30B9/26—Permeable casings or strainers

Definitions

• the present invention relates to a press for extracting fruit juices and more particularly for pressing grape harvests.
• a mechanical horizontal press with plates has a cylindrical cage, provided over its entire surface with very small slots, inside which are arranged two circular plates crossed by an endless screw with inverted pitch; the relative movement of rotation of the worm with respect to the plates making them approach or move apart according to the direction of rotation.
• the physical actions exerted on the harvest directly condition the quality of the soft and moreover they represent a significant risk of releasing the poor quality elements contained in the stalks (vegetable tastes), in the crushed seeds, in the torn dandruff (phenolic compounds bitter taste).
• the elements of good quality are mainly contained in the pulp of the grapes.
• the drainage means arranged in the median plane of the cylindrical cage are hollow tubes, made of perforated stainless steel sheet.
• press wines have a quality equal to that of "flowing wines”; pressing times are cut by more than half; there is no longer a cage break; the energy consumption is lower and there is practically no more wear of the mechanical parts.
• the present invention constitutes a third stage in the improvement of the press.
• the press according to the invention is a horizontal press with plates comprising a cylindrical cage having a multiplicity of openings, inside which is axially disposed a screw with inverted pitch, carrying two circular plates which approach one of the 'other to press the harvest which is between the two end trays each arranged on the inside of a tray characterized by the fact that it comprises: a), a device for controlling the means for pressurizing the harvest carrying out pressurization by successive pressure stages, of the order of only 0.25 to 0.5 bar, the maximum pressure being less than 2 bars ; b).
• drainage means made of perforated stainless steel sheet with a thickness of the order of 2 mm arranged inside the cylindrical press cage, at least in the median vertical plane thereof and possibly against the faces interior of the trays; vs).
• a cylindrical cage made of perforated stainless steel sheet wound with a thickness of between 3 and 5 mm, the total area of the perforations being between 15% and 25% of the surface of the cylindrical wall of said cage.
• the cage is provided at one end with a removable ferrule
• the cage is provided at its other end with a ferrule which is welded, - each ferrule is provided with an orifice for the evacuation of the pressed liquid,
• the central screw is made of stainless steel and the draining plates are fitted with food nylon nuts, without lubrication,
• the central drainage means consist of hollow tubes arranged in the median vertical plane of the press cage, - the additional drainage means consist of boxes placed against the internal faces of the plates.
• the problem to be solved is to make a press entirely made of stainless steel, so this supposes that the cylindrical cage is also made of steel. stainless and therefore to realize the cylindrical cage of the press in a sheet 1 of stainless steel wound and pierced with a multitude of orifices 2 so that the juice from the pressed grapes can flow.
• a rolled and drilled sheet does not have sufficient strength to withstand the considerable pressures which are developed in a usual horizontal press, especially if it has a large flow surface. It is in fact physically impossible to use a perforated sheet of rolled stainless steel, of small thickness, to produce the cage of a press such as those which are currently in use.
• the pressures implemented in the known presses are of the order of 8 bars and it follows that the forces acting on the walls are of the order of 70 to 80 tonnes.
• the cages of current presses are made by juxtaposing against each other slats reinforced by means of glass fibers, which are held by a plurality of straps.
• the present invention is in complete break with the evolution of the prior art: it consists in reducing the pressure while increasing the surface of the flow openings.
• the press is on the one hand provided with means controlling the pressure build-up gradually, in steps of approximately 0.25 bar without exceeding a maximum pressure of 2 bars and is on the other hand provided with means internal drainage, which facilitates the flow of juice and therefore allows to lower the pressure a little more.
• a circular casing with a thickness of about 10 cm is used which is welded to the cage 1 and stiffens it in its middle part.
• the two faces 3 a and 3 b of the housing 3 are provided with a multiplicity of bores and the interior of the housing 3 opens into the interior of the cage 1 through orifices 4.
• each drainage box 7 is, as described in the application Patent No. 01.14244, consisting of a box, placed in abutment against the inner face of plate 5 and whose face in contact with the harvest is pierced with a multiplicity of orifices.
• the cage 1 has two ferrules 10 and 11.
• One of the ferrules, the ferrule 11 in the example shown, is removable, which is necessary to be able to intervene inside the cage 1, if necessary.
• the other shell is welded.
• the two ferrules 10 and 11 as well as the central drainage box 3 increase the rigidity of the cage 1 and its resistance to warping.
• the ferrules 10 and 11 are curved and have internal reinforcements 12 to be more resistant and to stiffen the cage 1.
• the two ferrules 10 and 11 have orifices for draining the juice which would have interfered between the plates and the ferrules.
• the cage 1 As in any horizontal press, the cage 1 is rotated; but to avoid any twisting effect, it is rotated at its two ends.
• the press according to the invention has a drainage surface, at the center of the cage, at the level of the plates and at the level of the cage, much greater than those of all the presses currently existing.
• the quality of the press juices is such that they can be incorporated directly into the runoff juices which is also a considerable advantage.
• the press according to the invention comprises a pressure sensor, placed inside the grape mass and a speed variator of the motor for driving the draining plates so that the speed of approach of said plates is controlled by the pressure on the harvest.
• the press also includes a tray position sensor.
• the sensors are connected by radio to the control means of the variable speed drive.
• the screw is made of stainless steel and the plates are provided with food nylon nuts.
• the openings 2 which are made through the stainless steel sheet, are rectangular in shape with a width of around 2 mm and a length of around 15 mm, and contrary to what is shown in Figure 1, they are oriented perpendicular to the axis of the cylinder forming the cage 1.
• the possible elastic deformations of the sheet will not have the effect of widening the opening, which could allow passage to solids.
• known mechanical horizontal presses one proceeds by successive cycles, each cycle comprising a pressurization phase by bringing the two plates together, followed by a reset phase during which the plates are brought back to their starting position. .
• these chains and these hoops are illustrated in FIG. 1 of French patent 2,800,974 with the references 12 and 17.
• these chains sink into the mass of the material to be pressed; so that when the two plates 8 move away from each other they are stretched and are extracted from the mass of materials by crumbling it: this is what is designated by "re-drafting".
• these members 20 are fixed to the inner face of a plate by a base 21, and have an elongated body 22 at the end of which is fixed perpendicularly a part 23 which has the shape of a dihedron .
• the central drain, placed in the cage 1 of the press is a cylindrical housing which cuts the volume of said cage 1 into two parts, the part 23 will come to bear against this housing; the pressure exerted against the corresponding plate 8 will increase, this increase in pressure will be detected by the sensors which will cause the plates 8 to stop.
• the crumbling members 20 will be arranged to pass alongside and between the tubes, which will make their crumbling action even more effective.
• the elongated body 22 and the part 23 have a length of 300 mm.
• the elongated body can be a simple bar, but, as shown, it can be constituted by a hollow tube, provided with openings 24; so that the crumbling member 20 plays the role of an additional drain.
• FIG. 3 illustrates, by way of nonlimiting example, the operation of a press according to the invention.
• the speed of rotation of tank 1 is 8.5 t / m, the pressure being 0.01 bar.
• the C00 cycle, or drip cycle is carried out at a pressure ranging from 0 to 0.10 bar and a speed of rotation decreasing from 8.5 rpm to 0.5 rpm.
• this pressing operation will last approximately thirty minutes (depending on the nature of the material to be pressed) whereas with a usual press the pressing lasts 2 hours to 2 and a half hours, with pressures oscillating between zero and 7 to 8 bars, which causes degradation of the quality of the juices and rapid wear of the mechanical elements of the press.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
• Beans For Foods Or Fodder (AREA)

Applications Claiming Priority (5)

Publications (1)

Family

ID=29217329

Family Applications (1)

Country Status (4)

Families Citing this family (6)

Citations (2)

Family Cites Families (8)

• 2003
  • 2003-02-05 FR FR0301317A patent/FR2839007B1/fr not_active Expired - Fee Related
  • 2003-04-28 WO PCT/FR2003/001323 patent/WO2003092990A1/fr not_active Ceased
  • 2003-04-28 AU AU2003264883A patent/AU2003264883A1/en not_active Abandoned
  • 2003-04-28 EP EP03740675A patent/EP1499493A1/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (1)

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