• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a screw press (1) with a shaft (4) and helical coil (5) mounted thereon. It is characterized in that the helix (5) merges into a freely projecting helix (8) in the inlet region (2) of the screw press (1), wherein a tube (9) is preferably provided in the inlet region (2) of the screw extruder (1) is. As a result, on the one hand the sieve surface can be greatly enlarged, on the other hand the co-rotation of the suspension with the shaft can be reduced or avoided.
    公开号:AT511982A1
    申请号:T1475/2011
    申请日:2011-10-11
    公开日:2013-04-15
    发明作者:Roland Dipl Ing Zuschnig；Rudolf Ing Stadlauer；Johannes Knafl；Wolfgang Dipl Ing Magor
    申请人:Andritz Ag Maschf；
    IPC主号:
    专利说明:

    * * * ······························································· *
    The invention relates to a Schnecken'npresse'rrrit eSner ^ / Velte'und attached thereto spiral helix.
    Generally, dewatering screw presses are used to separate liquids and solids suspended therein. Many of these thickening and dewatering units are used particularly in the pulp and paper industry, since in this industrial sector water / pulp mixtures or in other words, suspensions are always used. Drainage screw presses have proved to be very efficient machines, especially in the thickening of suspensions of 3.5% to 4% solids content in the feed to 25 to 35% solids content in the outlet. Such a screw press is u.a. described in AT398,090. In the case of dewatering screw presses in the prior art, the available screen surface proves to be particularly problematic. It represents the limiting factor in drainage. The larger the sieve area, the greater the dewatering performance of the press. The screen area is currently determined almost exclusively by diameter and length.
    The aim of the invention is therefore to increase the screen area at a given length and diameter.
    This is done according to the invention in that the helix in the inlet region of the screw press merges into a freely projecting helix, wherein in the inlet region of the screw press, a tube may be provided over which sweeps the cantilevered helix, and preferably a gap between the tube and helix is provided. As a result, the available screen area in the inlet area of the dewatering screw press can be increased by a factor of the order of 1.5 to 1.8. Both the drainage and throughput of the screw press are increased.
    An advantageous development of the invention is characterized in that the tube is fixed and connected to the frame of the screw press. This gives a good discharge of the liquid without sealing problems.
    A favorable embodiment of the invention is characterized in that the shaft journal of the screw press is guided by the freely projecting helix, wherein the shaft journal can be guided by the fixed tube. 1
    2598-AT
    A favorable development of the invention is that the fixed tube is a sieve tube, wherein the stationary tube may also have grooves or microscopic / macroscopic surfaces which counteract the co-rotation.
    An advantageous embodiment of the invention is characterized in that the fixed tube has at least one filtrate channel, wherein the filtrate channel can be formed by a further tube between the fixed tube and the shaft journal.
    An advantageous development of the invention is characterized in that the filtrate channel is divided by means of web plates into a plurality of separate filtrate channels.
    The invention will now be described by way of example with reference to the drawings, in which FIG. 1 is an illustration of a screw press according to the invention,
    Fig. 2 shows the inlet part of a screw press according to the invention and
    Fig. 3 shows a worm shaft according to the invention.
    A screw press 1 as in FIG. 1 consists of an inlet housing 2, an outlet housing 3, a worm shaft 4 with one or more helical worm spirals 5 mounted on the worm shaft, these worm spirals 5 being able to be both continuous and interrupted, and a worm shaft 4 This creates between the housing shell 6, the screw shaft 4 and the spiral screw helix 5 a Förderspa / f 7 for the suspension to be dehydrated. This Förderspa / f 7 can change its geometry along the axis of the tapping shaft 4, but this need not necessarily.
    The principle of the screw press 1 is as follows: The worm shaft 4, which is mounted within the housing shell 6 is set by a drive of any kind in a rotary motion. About the connected to the housing shell 6 inlet housing 2, a suspension is supplied. The rotating shaft 4 moves this suspension through the spiral worm 5 within the second
    2598-AT »conveying gap 7 in the direction of the discharge housing 3 connected to the demo-housing element β. The housing casing 6 of a dewatering screw press 1 is usually designed as a sieve. The conveying gap 7 formed by the shaft 4, the worm gear 5 and the housing jacket 6 changes its geometry along the shaft axis, in the direction of the outlet housing 3, in a dehydrating manner. In most cases, the available volume along the shaft axis is reduced in order to achieve this so to force the drainage of the suspension. The liquid thus released is discharged through the housing jacket 6 designed as a sieve. In the region of the inlet housing 2, the screw helix 5 merges into a freely projecting spiral helix 8. The coil 8 is not necessarily zweigängig (as shown) executed. To increase the strength of the helix, this could also be stiffened with a U-profile. The freely projecting helix 8 passes with a sufficient gap over a fixed tube 9 in the inlet region of the screw press 1. This tube 9 is firmly connected to the frame of the screw press 1 and performs no rotational movement. The attached to the frame of the press 1 tube 9 is preferably designed as a sieve which in the inlet region of the press 1, the screen area is increased enormously. The tube 9 need not be designed as a sieve tube, but may also have any grooves or a macroscopic or microscopic rough surface. Through this surface, as well as by grooves or a sieve of the co-rotation is counteracted. This causes in addition to better drainage that the solid suspension (pulp suspension) no longer adheres to the metallic surface and thereby an axial transport of solids is ensured.
    The shaft 10 of the conventional worm shaft 4 is performed by the attached to the frame of the press 1 tube 9 and stored conventionally after the housing feedthrough.
    FIG. 2 shows the inlet part 2 of a screw press 1 according to the invention. The suspension enters into the inlet connection 11. The entire inlet part is connected in the illustrated embodiment by means of flange 12 with the housing shell 6. Of course, the inlet part can also be designed differently. The inlet part 2 has a tube 9, which is firmly connected thereto, as shown here by way of example by means of screws. Here, too, it is shown that a concentric tube 13, which has a larger diameter, than the shaft journal 10, 3 (not shown)
    2598-AT is provided. Pipe 9 and pipe 13'tJilden * somiterinen portrait channel 14. This filtrate channel 14 can also be divided by web plates into several separate Fiitratkanäie. The filtrate collected in the tube 9 is then passed through the filtrate channel 14 in the Filtratsammelflansch 15 and passed in this embodiment, for example, a Filtratsammelpfanne 16 in the filtrate tray 17 (Fig. 1) of the screw press 1.
    FIG. 3 shows a section through a worm shaft 4. One recognizes here the (conventional) worm spiral 5 as well as the projecting helix 8 and the stub shaft 10.
    The present invention offers two advantages over conventional screw presses:
    The sieve surface in the inlet region 2 of the screw press 1 is increased by a factor of 1.5 to 1.8. This significantly increases the drainage performance of the press 1.
    Furthermore, the co-rotation of the pulp is reduced. Fibers show a tendency to adhere to the rotating shaft. If the fiber adheres to the worm shaft 4, the axial transport is reduced or even comes to a standstill. The decisive factors for this co-rotation are the friction conditions inside the press. In conventional presses as well as in the conventional part of the screw extruder 1 4 1, the pulp is prevented by the designed as a sieve housing shell 6 of the press 1 to the co-rotation. However, the worm shaft 4 itself tries to put the pulp in a rotary motion. In addition, the pulp adheres to the surface of the worm shaft 4 and then co-rotates at the shaft speed without experiencing substantial axial feed. In the present invention, the adhesion of the pulp to the rotating worm shaft 4 in the inlet region is prevented by the fact that only a stationary pipe 9 is installed in the inlet region 2. The tube 9 is preferably designed as a sieve, but may also have any grooves or a macroscopically or microscopically rough surface. These grooves or macroscopically or microscopically rough surface can also be mounted on a tube 9 designed as a sieve. The worm shaft 4 or actually the pin 10 rotates within this tube 9. Both the sieve-like housing jacket 6 and the sieve tube 9 inserted in the inlet region 2 prevent the fibrous material from rotating. The cantilever 4
    2598-AT 5 «·· · ·
    Spiral 8 passes over the sieve tube 9 * Lincf transports the fibrous material purely axially forward. This leads to a considerable increase in the transport efficiency and thus to an increased material removal from the inlet region 2 of the press 1, whereby the inlet mass flow is increased. 5
    2598-AT
    权利要求:
    Claims (10)
    [1]
    A screw extruder with a shaft and spiral helix mounted thereon, characterized in that the helix (5) in the inlet region (2) of the screw press (1) merges into a freely projecting helix (8). 5
    [2]
    2. Screw press according to claim 1, characterized in that in the inlet region (2) of the screw press (1), a tube (9) is provided, over which the freely projecting coil (8) sweeps, preferably a gap between the tube (9) and Spiral (8) is provided. 10
    [3]
    3. screw press according to claim 2, characterized in that the tube (9) is fixed and connected to the frame of the screw press (1).
    [4]
    4. screw press according to one of claims 1 to 3, characterized in that the shaft journal (10) of the screw press (1) by the freely projecting coil (8) is guided. 15
    [5]
    5. screw press according to claim 4 with a fixed tube (9), characterized in that the shaft journal (10) through the fixed tube (9) is guided.
    [6]
    6. screw press according to one of claims 2 to 5, characterized in that the fixed tube (9) is a screen tube. 20
    [7]
    7. screw press according to one of claims 2 to 6, characterized in that the fixed tube (9) has grooves or microscopic / macroscopic surfaces which counteract the co-rotation.
    [8]
    8. screw press according to one of claims 2 to 7, characterized in that the fixed tube (9) has at least one filtrate channel (14).
    [9]
    9. screw press according to claim 6, characterized in that the filtrate channel (14) by a further tube (13) between the fixed tube (9) and the shaft journal (10) is formed. 6 2598-AT 25 • 9 «I · * · * Ι ·» 14 * · »·» «* * ··» ♦ * φ · 4 ««,, r
    [10]
    10. Screw extruder according to claim ίϊ by * marked that the filtrate channel (14) is divided by means of web plates into a plurality of separate filtrate channels. 7 2598-AT
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    US10005252B2|2018-06-26|
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    CN103946017A|2014-07-23|
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    引用文献:
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    SE507499C2|1996-10-07|1998-06-15|Spirac Engineering Ab|Separation device provided with transport coil and screen means|
    DE19805451A1|1998-02-11|1999-08-19|Bormet Maschinenbau Gmbh|Refuse washer for the removal of toxic substances|
    RU2162726C1|1999-07-05|2001-02-10|Рязанская государственная сельскохозяйственная академия им. П.А. Костычева|Press-filter for separation of suspensions and pressing-out of sediment|
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    CA2328810A1|2000-12-19|2002-06-19|Kvaerner Pulping Inc.|Screw press inlet section|
    SE0201184D0|2002-04-18|2002-04-18|Coriarius Ab|Screw compressor for compression of moist material and method for compression and washing|
    JP2004314130A|2003-04-17|2004-11-11|Ngk Insulators Ltd|Screw-press dehydrator|
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    CN2868659Y|2005-12-13|2007-02-14|天津百利机电发展有限公司|Organic-matter-dewatering squeezer|
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    法律状态:
    2021-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20201011 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1475/2011A|AT511982B1|2011-10-11|2011-10-11|SCREW PRESS|ATA1475/2011A| AT511982B1|2011-10-11|2011-10-11|SCREW PRESS|
    CN201280050308.6A| CN103946017B|2011-10-11|2012-09-10|Fly press|
    EP12768712.7A| EP2766177B1|2011-10-11|2012-09-10|Screw press|
    JP2014534953A| JP6147260B2|2011-10-11|2012-09-10|Screw press|
    US14/351,342| US10005252B2|2011-10-11|2012-09-10|Screw press|
    BR112014008559A| BR112014008559A2|2011-10-11|2012-09-10|helical press|
    RU2014116883A| RU2606820C2|2011-10-11|2012-09-10|Screw press|
    CA2851289A| CA2851289C|2011-10-11|2012-09-10|Screw press|
    PCT/EP2012/003785| WO2013053418A1|2011-10-11|2012-09-10|Screw press|
    CL2014000907A| CL2014000907A1|2011-10-11|2014-04-10|Screw press with a shaft and a helical blade mounted on it, in which the blade becomes a blade that projects freely in the inlet area of the screw press comprising a pipe in the inlet area of the press of screw on which the freely projecting blade sweeps and in which a gap is preferably provided between the pipe and the blade.|
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