BE495961A

BE495961A -

Info

Publication number: BE495961A
Authority: BE
Priority date: 1948-07-14
Also published as: FR1022329A; DE828483C

Description

       

  PRESSE POUR L'EXPULSION DU LIQUIDE D'UNE-MASSE LIQUIDIFERE,

  
L'invention concerne une presse pour l'expulsion du liquide d'une masse liquidifère., applicable par exemple&#65533; dans la préparation d'huile de hareng pour expulser l'huile et l'eau de la masse de harengs cuits. On a déjà obtenu de bons résultats en employant des presses à toile dites hydrauliques, mais actuellement elles ne sont plus considérées comme pratiques, vu leur faible rendement. 

  
Il s'ensuit que les usines intéressées ont cherche d'utiliser des  presses à vis automatiques, mais celles-ci présentent. l'inconvénient qu'une par-

  
 <EMI ID=1.1> 

  
cité de ces dispositifs est faible, mais un inconvénient encore plus grand en consiste que les substances séparées (fibres) de la masse sont déformées. La masse frotte contre les parois extérieures de la chambre de la pressée une très grande partie en est expulsée entre les ouvertures de la presses et l'expulsion n'est pas aussi grande et efficiente qu'on le désire.

  
Afin de remédier à cet inconvénient différents mécanismes sont em-

  
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Dans de telles presses cependant, les'filets des vis ne sont pas intégralement en contact mutuel sur toute leur longueur comme on le remarque-

  
 <EMI ID=3.1> 

  
que chacune des deux vis à axes parallèles présente un filet dont le diamètre diminue progressivement vers la sortie de la massee ce qui n'est pas appliqué actuellement dans les presses à double vis, dans lesquelles les diamètres du noyau augmentent graduellement vers la sortie, le pas diminuant préférablement vers la sortie. Ainsi tout rapport désiré peut être obtenu entre l'espace de section libre dans la chambre de la presse à sa sortie et à son entrée, et ce combiné avec un engrènement complet des filets des deux vis même sur le noyau de la vis voisine sur toute la longueur.

  
Selon l'invention, le même résultat peut également être atteint en disposant les deux vis en sorte que leurs axes forment un angle réduit l'un avec



  PRESS FOR THE EXPULSION OF LIQUID FROM A LIQUIDIFERING MASS,

  
The invention relates to a press for expelling liquid from a liquid mass., Applicable for example &#65533; in the preparation of herring oil to expel the oil and water from the mass of cooked herring. Good results have already been obtained by using so-called hydraulic fabric presses, but at present they are no longer considered practical, given their low efficiency.

  
It follows that the factories concerned have sought to use automatic screw presses, but these present. the disadvantage that one part

  
 <EMI ID = 1.1>

  
The quotation of such devices is small, but an even greater disadvantage is that the separated substances (fibers) from the mass are deformed. The mass rubs against the outer walls of the press chamber much of it is expelled between the openings of the press and the expulsion is not as large and efficient as desired.

  
In order to remedy this drawback, various mechanisms are used.

  
 <EMI ID = 2.1>

  
In such presses, however, the threads of the screws are not fully in contact with each other along their entire length as will be noted.

  
 <EMI ID = 3.1>

  
that each of the two screws with parallel axes has a thread whose diameter gradually decreases towards the exit of the mass, which is not currently applied in twin screw presses, in which the diameters of the core gradually increase towards the exit, the not decreasing preferably towards the exit. Thus any desired ratio can be obtained between the free section space in the chamber of the press at its exit and at its entry, and this combined with a complete engagement of the threads of the two screws even on the core of the neighboring screw on any the length.

  
According to the invention, the same result can also be achieved by arranging the two screws so that their axes form a reduced angle one with

Claims

the other, and that they converge towards the exit of the pressed mass or pulp and

using cylindrical or conical core screws in combination with

core diameters gradually decreasing towards the exit, preferably also with steps decreasing towards the exit.

However, in this case the screws can be executed so that

their diameters increase towards the exit, if the 'pitch along the screws is established

appropriately, but in all cases one or more of the fillets

screws near the outlet can be made with a greatly reduced pitch,

so that they present a suitable resistance to the evacuation of the mass.

The appended drawing shows schematically three exemplary embodiments according to the invention.

According to figure 1, the two screw axes 1 and 2 are arranged by- <EMI ID = 4.1>

from input 2. to output 6 of the mass. The outer diameter of

nets respectively 7 and � decreases towards the exit. It follows that the space

of free cross section of press chamber 2 (i.e. its cross section minus the cross section of the two screw cores) decreases towards the exit, even if the thread pitch was constant over the entire length of the opinion.

Preferably the pitch will decrease in the known manner towards the exit, as shown in FIG. 1. By varying the aforementioned ratios one can obtain any desired degree of expulsion.

As shown in Figure 2, the screw axes 1 and 2 are arranged so that they converge slightly towards the outlet 6, and the cores 10 and 11 respectively of the two screws are cylindrical. The press room

converges towards the exit. In this case it will be advantageous to perform both

screw so that their pitch decreases towards the exit.,

FIG. 3 represents a variant, in which the screw cores 12 and 13 respectively have a decreasing section, the diameter

decreasing towards the exit.

Good results can also be obtained, if the screw cores

are conical in the opposite direction if their diameter increases towards the exit.

Also in this case any desired degree of expulsion can be obtained by a

and not.

We will therefore notice that we obtain a large distance between the

the two transmission gears which can therefore be produced with

sufficiently strong teeth.

A characteristic common to all of the above executions is

that one or more threads near the outlet 6 may have a very small pitch in order thus to obtain the same resistance as elsewhere in the press. Furthermore,

the threads of each screw. mesh perfectly with the core of the other screw.

short cylindrical or short parts of cylindrical core screws for

the supply or discharge of: the pressed mass, can be arranged

entry and / or exit. In addition, it will be better to make part of the screws near the exit in the form of a movable end piece

and suitably tubular, preferably but not necessarily cylindrical.

The purpose of this possibility of displacement is to allow the insertion of end pieces with different screw threads, so that the expulsion ratio

can be varied easily and that only one press can be used for the treatment of various raw materials.

CLAIMS.

poured out and disposed in a perforated chamber to expel the liquid from a

liquid mass or pulp, for example to express oil and water from a

mass of cooked herring, characterized by the fact that each of the two screws

parallel axes presents a thread whose diameter gradually decreases towards the outlet of the massée the diameter of the core increasing and the pitch of the thread decreasing towards the outlet $ so that the threads of each screw mesh fully towards the inside with the core of the other screw along the entire length of the screw.

the axes of the two screws are arranged so that they form a reduced angle with each other, thus converging towards the exit of the mass or expelled pulp $,

and having cylindrical or conical cores in combination with gradually decreasing core diameters towards the exit preferably also, in known manner, with decreasing pitches towards the exit.

stantially as described and illustrated.