• 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 present invention relates to a method for densifying pulverized material conveyed by a conveying screw (3) in a screw housing (2), which is vacuumed and compressed through a filter (11) on the inner circumference of the screw housing (2). Air is applied to the shift.
    公开号:KR20020029381A
    申请号:KR1020027002052
    申请日:2000-08-23
    公开日:2002-04-18
    发明作者:이글레시아스요안；아리사요셉
    申请人:에프. 아. 프라저, 에른스트 알테르 (에. 알테르), 한스 페터 비틀린 (하. 페. 비틀린), 피. 랍 보프, 브이. 스펜글러, 페. 아에글러；시바 스페셜티 케미칼스 홀딩 인크.；
    IPC主号:
    专利说明:

    Method and device for densifying pulverized material
    [2] Techniques for densifying pulverized material between two pressure rollers are known, for example by means of two conveying screws arranged in parallel with one another in a housing and rotatably arranged in said housing. Pressurized by the gap between them, the ground material in the housing is filled through the filling hopper under gravity action. Gas or air contained in the pulverized material has a disturbing effect and may worsen the densification work between the two rollers.
    [3] It is known to provide a filter in the periphery of the conveying screws to which filter vacuum can be applied in the screw housing in order to remove the air contained in the crushed material before entering the roller clearance.
    [1] The present invention relates to a method and apparatus for densifying and compacting ground or powdered materials.
    [6] 1 is a schematic side view of an assembly for densifying pulverized material;
    [7] FIG. 2 is a plan view of the housing partially broken away from the direction of the arrow C of FIG. 4 on the transfer screw; FIG.
    [8] 3 is a side view seen from the direction of arrow A of FIG.
    [9] 4 is a sectional view taken along the line B-B in FIG.
    [10] 5 is an enlarged cross-sectional view corresponding to FIG. 4.
    [11] 6 is a plan view of a preferred embodiment.
    [12] FIG. 7 is a longitudinal sectional view taken along the line F-F in FIG. 6; FIG.
    [13] 8 is a cross-sectional view taken along the line A-A of FIG.
    [14] 9 is a cross-sectional view taken along the line L-L of FIG.
    [15] 10 is a sectional view taken along the line B-B in FIG.
    [16] FIG. 11 is an enlarged view of portion X of FIG. 8 in detail. FIG.
    [17] Explanation of symbols on the main parts of the drawings
    [18] 1: filling hopper 2: screw housing
    [19] 3: feed screw 4: press roller
    [20] 5 agitator 6 inlet opening
    [21] 7: cooling means 8: chamber
    [22] 9 connection opening 10 shoulder
    [23] 11 filter 12 plate
    [24] 13: insert 14: sealing ring
    [25] 15 flange 16 connection opening
    [26] 17 line 18 switch means
    [27] 19: vacuum source 20: compressed air source
    [28] 21 ring element 22 mouthpiece
    [29] 23 Channel 24: Bore
    [30] 25: inner surface 26: duct
    [31] 27: connection bore 28: arrow
    [32] 30: lower housing 31: upper housing
    [33] 32: front part 33: rear part
    [34] 34: bar 35: screw
    [35] 36 bar 37: passage
    [36] 38: connection passage 39: passage
    [37] 40: connecting passage
    [4] It is an object of the present invention to increase the efficiency of the device for densifying the milled material.
    [5] This purpose essentially increases the densification efficiency of the press rollers by applying alternating vacuum and compressed air through the filter on the conveying path between the filling hopper and the roller clearance to achieve increased precompression of the ground material in the conveying screw. Is achieved according to the invention.
    [38] The invention is explained in more detail by means of examples relating to the accompanying drawings.
    [39] 1 shows the compaction of a pulverized material comprising a vertically arranged filling hopper 1 positioned over an inlet opening of a horizontally arranged screw housing 2 with a conveying screw 3 rotatably disposed therein. A schematic illustration of the assembly is shown. At the outlet of the screw housing opposing press rollers 4, 4 ′ are arranged, and the ground material conveyed by the conveying screw 3 into the roller gap between the rollers is compressed and densified. The filling hopper 1 may be arranged with an agitator 5 which assists in filling the ground material from the filling hopper 1 into the screw housing under gravity action. For example, the assembly is used to granulate the ground material and further means that can be installed in front of the hopper 1 and behind the roller pairs 4, 4 ′ are omitted in FIG. 1.
    [40] In one embodiment, two chambers 8 are formed in the screw housing, each chamber via a line 17 to a switch means 18 arranged between the vacuum source 19 and the compressed air source 20. Connected. In this way it is possible to apply a vacuum to one chamber 8 or vice versa to apply compressed air or pressurized air to another chamber 8.
    [41] In FIG. 1, only one screw is shown in the screw housing 2, but a plurality of screws can be arranged next to each other to increase the carrying capacity. FIG. 2 shows an example with two transfer screws 3, 3 ′ arranged parallel to each other, which screws are rotatably arranged in the screw housing. The inlet opening 6 is provided on the upper side of the screw housing 2 in FIGS. 2 to 4. A hopper 1 is arranged above this inlet opening 6, which inlet opening 6 spans the width of two screws 3, 3 ′ arranged substantially parallel to each other, as shown in FIG. 4. Is extended.
    [42] In the embodiment shown in FIGS. 2 to 5, the opposite sides of the screw housing 2 are provided with three chambers 8 spaced apart from each other along the conveying path. The chamber 8 is, for example, made of a rectangle, the long side of the rectangle extending in the longitudinal axis direction of the conveying screw. The transition between the chamber 8 and the inner circumference of the screw housing 2 is provided with a generally rectangular connection opening 9 as shown by the dashed lines in FIG. 3. This connection opening 9 is surrounded by a shoulder 10 of the housing 2, which shoulder abuts against a plate-shaped filter 11, which may for example consist of a sintered material or a filter fleece. Form the mold surface. In FIG. 5, a ring element 21 is provided between the shoulder 10 and the filter 11 to support the filter. The ring element 21 can be replaced with a perforated plate for supporting the inner side of the filter 11 when pressurized air is supplied. The filter 11 is supported on the outside by a perforated plate 12 which is fixed by the insert 13 in the chamber 8. The outer circumference of the tubular portion of the insert 13 protruding into the chamber 8 is provided with a sealing ring 14 which seals the chamber 8 against the outside. On the closed outer side of the insert 13, a connecting opening 16 and a flange 15 are formed, through which the insert 13 is gas-tight to the screw housing 2, for example by means of a screw. Is fastened.
    [43] During operation, vacuum and compressed air are applied alternately through the connecting openings 16 on the chamber 8 arranged one after the other in the conveying direction. The ground material conveyed by the conveying screw 3 is deaerated through the filter 11 by the vacuum applied as above, the filter is cleaned by compressed air, and the ground material in the conveying screw is compressed. .
    [44] The amount of vacuum and the interval of application of vacuum and compressed air can be varied and the degree of deaeration can be adjusted according to the type of milled material used. Similarly, the order of applying vacuum and compressed air to successive chambers can also be changed. In one embodiment, vacuum is applied to the two chambers 8 and compressed air is applied to the third chamber.
    [45] By alternately applying vacuum and compressed air to the chamber 8, the compacted material is clearly degassed and pre-compressed with high efficiency in the conveying screw before reaching the roller clearance, thereby significantly higher densification or Compression efficiency is achieved in the pressure roller. According to the invention, high deaeration is achieved with a small filter surface.
    [46] In the embodiment shown, the chambers 8 are arranged along the sides of the screw housing 2. However, the chambers 8 may be provided on the lower side of the screw housing 2. For example, if three conveying screws are arranged side by side in the screw housing 2, the chamber may be provided in the region of the intermediate conveying screw on the lower side of the housing 2 and the chamber 8 for the two outer conveying screws. ) May be provided on their respective sides or on the lower side of the housing 2 as in the case of intermediate screws.
    [47] Instead of the three chambers 8 shown, additional chambers may be provided over the length of the conveying screw corresponding to the length of the conveying path. Only one chamber 8 may be provided around the conveying screw, in which vacuum and compressed air are alternately applied. However, higher efficiency is achieved by a plurality of chambers arranged side by side.
    [48] Vacuum and compressed air are simultaneously applied to the chamber 8 provided on the same side in the screw housing 2. In this way, for example, in FIGS. 2 and 3, the first chamber 8 is provided in an area in the conveying screw, in which a vacuum is applied, and the third chamber 8 is provided in an area in the conveying screw. Compressed air is applied to this area. These regions are sealed to each other by the periphery of the conveying screw 3. The distance between the chambers 8 arranged longitudinally side by side is selected depending on the pitch of the conveying screw 3 so that no shortcut occurs between neighboring chambers 8, one chamber being compressed air When operated by, the neighboring chamber is operated by vacuum.
    [49] Preferably, at least the first chamber 8 is provided adjacent to the area of the inlet opening 6. In the embodiment shown, two chambers 8 are provided in the region of the inlet opening 6, the diameter of the inlet opening extending over the two chambers 8.
    [50] According to an embodiment of the invention, vacuum is applied for a period longer than compressed air. Compressed air and vacuum may also be applied in the form of short pulses with respect to each other.
    [51] In an embodiment comprising three chambers 8, for example, the first and second chambers are operated by vacuum while compressed air is applied to the third chamber. When vacuum and compressed air are alternately applied to separate the chambers 8 arranged in the conveying direction in which one chamber is located behind the other, higher preliminary compression occurs than when only one chamber 8 is applied, Although these chambers extend over the same transport path, several individual chambers 8 are arranged at a constant distance from each other.
    [52] The conveying screw is provided with a reduced diameter part, which is confirmed from the top view shown in FIG. 2, in which the cooling means 7 are arranged. However, the conveying screws may all have the same diameter.
    [53] Figures 6 to 11 show another preferred embodiment of the device according to the invention, wherein like reference numerals are used for identical or corresponding elements.
    [54] According to this embodiment, the channel 23 is provided along the longitudinal extension of the conveying screw 3 instead of the chamber 8, so that perforations can be provided over the entire length of the conveying screw.
    [55] By way of example, the embodiment according to FIGS. 6 to 10 shows an apparatus comprising four conveying screws 3 arranged parallel to one another in a rectangular housing 2. In the top view of FIG. 6, a rectangular inlet opening 6 is provided on the upper side of the housing for connecting the housing 2 to the filling hopper 1 as shown in FIG. 1.
    [56] The longitudinal cross-sectional view of FIG. 7 corresponds to FIG. 1, which shows the mouthpiece 22 between the housing 2 and the pressure rollers 4, 4 ′ in more detail.
    [57] On the lower side of the housing 2 opposite the inlet opening 6 a channel 23 is provided inside the housing 2, which extends along the length of the housing 2. 8 and 9 show three channels 23 arranged parallel to one another in the region of a single conveying screw 3. Each channel 23 is connected to a plurality of small diameter bores 24, which extend between the inner surface 25 of the housing 2 and the channel 23 and the fabric in the plate 12 of FIG. 5. Cope with studying. In this embodiment, two rows of bores 24 are provided along a single channel 23 as shown in FIG.
    [58] In order to supply vacuum and compressed air to the channels 23, a duct 26 is provided which extends downwardly essentially perpendicular to the channels 23 at the bottom of the housing 2 as shown in FIG. 9. . Vacuum and compressed air are alternately supplied to the duct as indicated by arrow 28. Each duct 26 is connected to two channels 23 through connecting bores 27 extending vertically. The ducts 26 have different lengths and the longest duct 26 extends to the sixth channel 23 adjacent the longitudinal center axis of the housing 2. The other duct 26 extends from both sides of the housing 2 to the fifth channel 23, while the shortest duct 26 is the fourth channel from the outside of the housing 2 as shown in FIGS. 9 and 10. Extends to (23).
    [59] In the embodiment shown, six ducts 26 are provided on each side of the housing 2, and three ducts 26 with different lengths are each half of the longitudinal extension of the conveying screw 3. Is provided for. In this way, each channel 23 is connected to two ducts 26 via two connecting bores 27. In this way, vacuum and compressed air are supplied to all the bores 24 of the channel 23 in an efficient manner.
    [60] The housing 2 has at least four parts: a lower part 30 provided with a channel 23 and a duct 26, an upper part 31 provided with an inlet opening 6, and a front part as shown in FIG. 7. And rear portions 32 and 33. The inner surface 25 of the lower portion 30 (see FIG. 8) is provided with perforations in the form of bores 24. Fabric filter 11 extends above the perforation or bore 24. The fabric filter 11 is fixed under tension by fastening elements in the form of bars 34 extending on both sides of the housing bottom 30 along the grooves in the housing bottom 30 between the channels 23. The bar 34 is fastened by a screw 35 on the housing bottom 30 and the fabric filter 11 is clamped between the bar 34 and the housing bottom 30. A bar 34 consisting essentially of a triangular cross section is provided between the conveying screws 3 to fill the triangular space between adjacent conveying screws as shown in FIGS. 10 and 11. The fabric filter 11 is also clamped between the bar 36 and the housing bottom 30.
    [61] The plate-shaped housing bottom 30 is provided with a cooling passage 37 for circulation of the cooling medium in the housing bottom 30. In this embodiment, one passage 37 extends across the channel 23 to supply the cooling medium and the other passage 37 'is provided for the return flow. Between these passages 37, 37 ′, there is provided a connecting passage 38 extending vertically along the longitudinal axis of the housing bottom 30 as shown in FIG. 11.
    [62] In the upper part 31 of the housing, corresponding passages 39, 39 ′ and connecting passages 40 are provided for circulation of the cooling medium, as shown in FIGS. 6 and 10.
    [63] Notwithstanding the fact that vacuum and compressed air are applied alternately over the length of the conveying screw 3, in densification of the pulverized material, perforations in the form of bores 24 over the entire length of the conveying screw 3 and Due to the compact arrangement of the channels 23 very high efficiencies are achieved by the embodiment according to FIGS. 6 to 10.
    [64] Instead of the duct 26 extending across the channel 23, the duct may also be provided in the front and rear portions 32, 33 of the housing to supply vacuum and compressed air to the channel 23.
    [65] Alternating application methods of vacuum and compressed air through filters as described above can be applied to various devices for densifying and compacting ground material, for example packaging assemblies where the high packing weight of the package and the reduction of grinding volume are important. Similarly, the method and apparatus according to the present invention can be applied to the side conveyer of an extruder for a lightweight feed mill or the like.
    权利要求:
    Claims (11)
    [1" claim-type="Currently amended] In a method for densifying pulverized material conveyed by a conveying screw (3) in a screw housing (2),
    A method for densifying pulverized material in which vacuum and compressed air are alternately applied through the filter (11) to the inner circumference of the screw housing (2).
    [2" claim-type="Currently amended] 2. Method according to claim 1, wherein a plurality of chambers (8) are provided side by side over the length of the conveying path, and vacuum and compressed air are alternately applied to the chambers (8).
    [3" claim-type="Currently amended] 3. Method according to claim 2, wherein the vacuum is applied to one chamber while at the same time compressed air is supplied to the adjacent chamber (8).
    [4" claim-type="Currently amended] The method of claim 1 wherein the vacuum and compressed air are applied through a plurality of bores (24) provided in a channel (23) extending over the length of the conveying screw.
    [5" claim-type="Currently amended] 4. A method according to any one of the preceding claims, wherein the amount of vacuum and the interval of application of the vacuum and compressed air are varied.
    [6" claim-type="Currently amended] Apparatus for densifying pulverized material comprising at least one conveying screw (3) in a screw housing (2)
    On the periphery of the conveying screw in the screw housing a perforation covered by a filter 11 is provided, which filter lines the switch means 18 arranged between the vacuum source 19 and the compressed air source 20. Apparatus for densifying pulverized material connected via means (17).
    [7" claim-type="Currently amended] 7. The method according to claim 6, wherein at least two chambers (8) in the longitudinal direction of the conveying screw in the screw housing are provided spaced at a distance from each other, and the chambers (8) are provided by the switch means by vacuum and compressed air. Apparatus for densifying pulverized material which can be operated alternately individually by (18).
    [8" claim-type="Currently amended] 8. Apparatus according to claim 6 and 7, wherein each chamber (8) is provided with an insert (13) and the insert (13) is provided with a sealing ring (14).
    [9" claim-type="Currently amended] 10. The plate-shaped filter (11) according to claim 8, wherein the plate (12) provided with perforations is supported by the insert (13), on which the plate-shaped filter (11) abuts against the shoulder (10) of the screw housing (2). And the shoulders for densifying the milled material surrounding the connecting opening (9).
    [10" claim-type="Currently amended] The inner surface 25 of the housing 2 according to claim 6, wherein the at least one channel 23 extends along the length of the conveying screw 3 in the screw housing and through a drill in the form of a bore 24. A device for densifying pulverized material connected to and connected to a duct (26) for alternately supplying vacuum and compressed air.
    [11" claim-type="Currently amended] 11. Apparatus according to claim 10, wherein the fabric filter (11) is densified crushed material fastened to the inner surface of the housing (2) by fastening elements (34, 36).
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    同族专利:
    公开号 | 公开日
    EP1283169A3|2003-03-05|
    EP1206391B1|2003-10-15|
    AU6703000A|2001-03-19|
    DE60005972D1|2003-11-20|
    WO2001014210A1|2001-03-01|
    US6688345B1|2004-02-10|
    ES2207543T3|2004-06-01|
    DE60005972T2|2004-09-09|
    JP2003507272A|2003-02-25|
    CN1370123A|2002-09-18|
    EP1283169A2|2003-02-12|
    EP1206391A1|2002-05-22|
    TW495472B|2002-07-21|
    CA2382077A1|2001-03-01|
    AT252022T|2003-11-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1999-08-23|Priority to EP99116170.4
    1999-08-23|Priority to EP99116170
    2000-08-23|Application filed by 에프. 아. 프라저, 에른스트 알테르 (에. 알테르), 한스 페터 비틀린 (하. 페. 비틀린), 피. 랍 보프, 브이. 스펜글러, 페. 아에글러, 시바 스페셜티 케미칼스 홀딩 인크.
    2000-08-23|Priority to PCT/EP2000/008237
    2002-04-18|Publication of KR20020029381A
    优先权:
    申请号 | 申请日 | 专利标题
    EP99116170.4|1999-08-23|
    EP99116170|1999-08-23|
    PCT/EP2000/008237|WO2001014210A1|1999-08-23|2000-08-23|Method and device for densifying pulverized material|
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