EP2185287A1 - Vibratory grinding mill - Google Patents
Vibratory grinding millInfo
- Publication number
- EP2185287A1 EP2185287A1 EP08803948A EP08803948A EP2185287A1 EP 2185287 A1 EP2185287 A1 EP 2185287A1 EP 08803948 A EP08803948 A EP 08803948A EP 08803948 A EP08803948 A EP 08803948A EP 2185287 A1 EP2185287 A1 EP 2185287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- piston
- discharge
- mill according
- floor
- 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
Links
- 238000000227 grinding Methods 0.000 title claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/16—Mills provided with vibrators
Definitions
- the invention relates to a vibrating mill, in particular disc vibrating mill, with a grinding unit, wherein the grinding unit has a lowerable grinding floor and a discharge floor, further wherein the discharge floor has a circulating discharge chute for conveying the ground material to or through a discharge element.
- Vibratory mills or grinding units of the type in question are known and are used for example for grinding a sample of pourable, granular material in the course of preparation of the sample for desired analyzes.
- the discharge chute is continuously circumferentially sloping, with the exception of at least one step-shaped transition, in particular with the exception of at least one wall-like separation region between a gutter start region and a gutter end region, in which the gutter bottom is lower than in the gutter region.
- the discharge chute is preferably formed in the form of a helix.
- the discharge chute extends along the predominant circumference of the grinding floor, in particular along the substantially entire or even the entire circumference of the grinding floor.
- the sloping channel bottom or optionally the entire discharge chute can follow the inclined course of a helical or spiral turn or a section of such a turn.
- the discharge chute follows the outline of a circular line along the predominant circumference of the grinding floor and extends outwardly in a gutter end area from the circular line, in particular tangentially to the circular line.
- the boundary of the discharge channel in the channel end region to have an opening, wherein the opening can preferably lie in the channel bottom and / or in the region of the radially outer channel wall.
- the channel bottom is located in the channel start region below the surface of the grinding ground.
- the discharge chute is adjacent to the grinding floor in the radial direction or overlapping this in projection.
- the discharge tray is preferably fixedly connected, in particular in one piece, with a cylinder part in which a piston used for lowering or raising the grinding base, for example further pneumatically / fluidically actuated piston, is guided.
- a further improvement in terms of the grinding result is achieved in that the discharge tray can be blown out, so it can be cleaned further using a fluid, for example with air, but also by means of a fluid such as nitrogen.
- a fluid for example with air, but also by means of a fluid such as nitrogen.
- residual regrind is blown in the direction of the discharge chute.
- exhaust nozzles pointing tangentially into the discharge chute which support the transport of the ground material from the discharge tray in the direction of the discharge element.
- one or more, preferably uniformly spaced, tangentially oriented discharge nozzles can be provided.
- blowing nozzles are arranged in the discharge floor or, if appropriate, arranged for impinging the discharge gap and for blowing out ground material into the discharge chute.
- blowing nozzles in particular the further blowing nozzles acting on the discharge gap, are directed radially inward.
- one or preferably a plurality of preferably uniformly spaced, radially oriented blow-off nozzles can be provided.
- the piston has two piston sections of different diameters, wherein the piston walls of the piston sections overlap while leaving a vertically opening recess for a collar.
- the collar is formed coaxially to the cylinder part on the underside of the outlet bottom and sealingly comes against the upper piston portion of comparatively smaller diameter, wherein it is provided in particular that the insertion recess fits geometrically, in particular laterally positively, to the collar is.
- this is guided at the lower piston portion of comparatively larger diameter by means of at least one piston guide ring in the cylinder part.
- the described over-access formation for the upper piston edge enables a piston extension, whereby even if a piston guide ring and adjacent seals are arranged by said overlaps in the axial direction of the piston, a compact design is still possible. This also creates the possibility of existing existing vibrating mills with predetermined or limited space with corresponding components for upgrade the piston guide.
- the features relating to the piston guide in particular the use of a piston guide ring and / or features in connection with the described overlap inflection formation between piston and discharge base or cylinder part, can also be in the form of independent claims, ie also in the context of the invention without the features of claim 1, be of importance.
- the grinding wall is held positively.
- the grinding soil is sealed relative to a side wall of the discharge chute. This more preferably both in the lowered and in the raised position of the same.
- a new cleaning method for a vibrating mill of the type in question is hereby also indicated.
- a fluidic cleaning / blowing out of the discharge chute and suction preferably from top to bottom and / or by shaking.
- FIG. 1 is a sectional view through a fiction, contemporary vibratory mill according to a preferred embodiment along section line I-I in Figure 3 with lowered grinding floor ..;
- FIG. 1a shows the arrangement of FIG. 1, but with the grinding ground comparatively raised for the grinding operation
- Figure 2 is a side view of a discharge of the vibrating mill in an individual view. 3 shows the plan view for this purpose with a view to a discharge chute;
- FIG. 5 shows the sectional view along the line V-V in Fig. 3.
- FIG. 6 shows the sectional view according to the line VI-VI in Fig. 3.
- Fig. 12 is a sectional view taken along section line XII-XII in Fig. 3;
- Fig. 1 shows a cross section through the upper portion of a vibrating mill 1 according to the invention according to a preferred embodiment.
- This is a so-called disc vibrating mill whose grinding unit 2 represents an assembly that can be excited into vibrations by a separate oscillating drive.
- the grinding unit 2 includes a grinding chamber 3, which is externally bounded by a cylindrical grinding wall 4. At this closes below during the grinding operation, a substantially circular grinding soil 5 at. On this are as grinding elements a grinding ring 6 and a millstone 7. Between the grinding wall 4 and Mahlring 6 a grinding gap 8 is formed. Another grinding gap 9 is established between the grinding ring 6 and the grinding stone 7. This enables a lateral relative movement of grinding ring 6 and grinding stone 7 both relative to one another and with respect to the grinding wall 4.
- a housing ring 10 adjoins the grinding wall 4 radially outside and which is screwed to the underside with a housing base 11 which forms a discharge base 12 and is thereby connected to a drive flange 13.
- a housing base 11 which forms a discharge base 12 and is thereby connected to a drive flange 13.
- To the drive flange may be any, commonly used for vibrating mills and therefore not connected in the figures with oscillating drive.
- the housing ring 10 is screwed to a housing cover 14 which, when placed, is centered by means of an annular projection 32 in a form-fitting manner with respect to the housing ring.
- the grinding wall 4 is form gleichgehaltert the inside of the housing ring 10, held in the axial direction between an upper, radially inwardly projecting collar of the housing ring 10 and the underside by a provided support ring 29.
- a cylinder part 15 is formed on the underside.
- a piston 16 is guided by means of a piston guide ring 31, which enters the bottom of the grinding base 5 on the underside. Via a fluidic control of the piston 16, the grinding base 5 can be raised or lowered over it.
- the piston 16 has two successive piston sections 17 and 18 in axial extension. These have different diameters, wherein the piston head 18 facing the grinding base 5 is reduced in diameter relative to the piston section 17.
- the piston walls 19 and 20 of the piston sections 17 and 18 overlap, leaving a vertically upward opening, ring-like insertion recess 21.
- a pressure chamber 33 in the form of an annular cavity is formed between the cylinder part 15 and the piston 16.
- the pressure chamber 33 is connected via a line 35 with a connecting piece 36 in connection, so that can be applied to lower the grinding floor 5, an overpressure.
- the piston 16 has at its lower end face a radially inner annular projection which forms a limit stop with a plate 53 in the lower travel position shown in FIG. In this case remains radially adjacent to the annular projection serving as a further pressure chamber 50 annular gap.
- This is connected via a line 54 with a connecting piece 52 in connection, so that can be applied to raise the grinding floor 5 to the pressure chamber 50, a pressure.
- the pressure chamber 50 continues into the piston interior 51.
- the collar 22 in the exemplary embodiment, as can also be seen from the figures, is the ring section 22, so that in this context the terms collar and ring section are also interchangeable.
- the grinding base 5 exerted by the piston 16 on the underside, acts sealingly against the grinding wall 4 on the underside.
- FIG. 1a This situation is illustrated in FIG. 1a.
- a discharge gap 23 is circulatingly released, through which, according to further vibration excitation, the comminuted material to be ground passes into a discharge channel 24 that is annular in plan.
- the grinding base 5 is circumferentially covering with a ring seal 39 is provided.
- the Austragsrinne 24 is circumferentially sloping down to a discharge element 25, this further helically continuous falling continuously, with the exception of a step-shaped transition 26, see between the trough starting region lowest height and the discharge element 25 associated Gutter end of greatest height.
- FIG. 3 shows, in a top view, that the discharge chute 24 is designed to continuously descend, except for a wall-like separation region 26 'between a chute start region 40 and a chute end region 41, in which the chute bottom 42 is lower than in the chute start region 40.
- the level difference of the gutter bottom 42 between the gutter starting region and the gutter end region can be, for example, 10 mm, but may also assume different values.
- the discharge chute 24 extends following a circular line. Only in the gutter end region 41 does the discharge chute 24 deviate outward from the circular line along a tangential line 43, wherein the boundary 44 of the discharge chute 24 (see also FIGS.
- FIG. 12 shows that the opening 45 adjacent to the discharge element 25 is located in the gutter end region 41 at the lowest point of the gutter bottom 42.
- the discharge floor 12 or the discharge chute 24, moreover also the discharge gap 23 resulting after lowering the grinding floor 5, can be blown out by means of compressed air.
- blow-off nozzles 27 and 28 are provided, wherein the blow-off nozzles 27 point tangentially into the discharge chute 24, this further in the direction of inclination of the discharge chute 24.
- the blow-off nozzles 28 are directed radially, in particular for blowing out or for cleaning the area of the discharge gap 23, for example with compressed air.
- FIG. 3 illustrates that, in the example chosen, three blow-off nozzles 27 are provided on the delivery floor 12 for blowing out tangentially and three blow-off nozzles 28 are provided for radial blowing.
- three blow-off nozzles 28 are provided for radial blowing.
- along the circumference of the distance between two identical nozzles is many times greater than the distance between two closely adjacent nozzles 27 and 28.
- a port 46 for a radial exhaust nozzle 28 and a port 47 for a tangential exhaust nozzle 27 is shown.
- the piston 16 is fixed at its upper end wall 48 by means of a plurality of circumferentially distributed screws 49 with the grinding base 5.
- the entire device is essentially tight. It takes place at the same time on the Austragselement 25 an active suction instead.
- the extracted air quantity may be equal to or per unit of time also slightly larger than the amount of air blown. It is also a pulse-like bubbles possible.
- further cable routes 30 are provided for a cooling not shown. With regard to this cooling, reference is made to the German patent application with the file reference DE 10 2006 042 825 A1. The content of this patent application is hereby incorporated in full into the disclosure of the present invention, also for the purpose of including features of this patent application in claims of the present invention.
- the grinding unit 2 of the vibrating mill 1 can be supported via a sliding guide and furthermore optionally have speed-changing means.
- the vibrating mill 1 has distributed in the exemplary embodiment selected on the circumference of Austragsrinne 24 arranged a plurality, in the concrete example six, exhaust nozzles 27, 28.
- the respective positions of the exhaust nozzles along the circumference of the Austragsrinne Fig. 3 can be seen.
- the three tangentially oriented purging nozzles 27 are equidistantly spaced from each other along the circumference, so that the angle formed between two respectively adjacent positions is 120 degrees in each case.
- the blow-off nozzles 27 and 28 are each formed as recesses or bores in the discharge floor 12.
- the contour of the tangentially oriented blow-off nozzles 27 can also be taken schematically from FIG. 3 and comprises a side directly on the exit side Austragsrinne 24 opening, relatively narrow bore 55 and a subsequent thereto nozzle inlet side, compared with cross-section larger and provided with internal connection bore 56, to which the example.
- Fig. 1 visible port 47, which may be connected, for example. With a compressed air line, connectable is.
- the longitudinal contour of the radially oriented exhaust nozzles 28 can be seen in FIGS. 3 and 13.
- this contour also comprises a relatively narrower bore 57 at the nozzle exit side and a connecting bore 58, which is provided with an internal thread, adjoining the nozzle inlet side, into which the connection 46, for example a compressed air supply line, is connected by screwing.
- the nozzle-outlet-side bores 57 of the radially oriented outlet nozzles 28 open into a ventilation channel 59 which extends in the circumferential direction U (see FIG. 3) of the discharge channel. At this closes at the radially inner edge down to a vertically extending gap 60 at.
- the width of the ventilation channel 59 is a multiple of the width of gap 60.
- the diameter of the bore 57 is a multiple of the width of gap 60.
- the discharge chute 61 At its bottom joins the gap 60, the discharge chute 61 at , which is bounded below and on the sides of the discharge chute 24. It is also clear that the lower gap end 62 is adjacent to the radially outer boundary wall 63 of the discharge chute 24 at its upper end.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007043940 | 2007-09-14 | ||
DE102007057020 | 2007-11-27 | ||
DE102008035009A DE102008035009A1 (en) | 2007-09-14 | 2008-07-25 | vibratory mill |
PCT/EP2008/061981 WO2009037159A1 (en) | 2007-09-14 | 2008-09-10 | Vibratory grinding mill |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2185287A1 true EP2185287A1 (en) | 2010-05-19 |
EP2185287B1 EP2185287B1 (en) | 2011-05-11 |
EP2185287B8 EP2185287B8 (en) | 2011-09-28 |
Family
ID=40032473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08803948A Active EP2185287B8 (en) | 2007-09-14 | 2008-09-10 | Vibratory grinding mill |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2185287B8 (en) |
AT (1) | ATE508796T1 (en) |
DE (1) | DE102008035009A1 (en) |
WO (1) | WO2009037159A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107890912B (en) * | 2017-11-10 | 2019-07-26 | 周飞 | Grinding device is used in a kind of production of bio-fuel |
CN110694769B (en) * | 2019-09-25 | 2024-03-22 | 镇江市科瑞制样设备有限公司 | Novel sample preparation rubbing crusher |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU852354A1 (en) * | 1979-07-13 | 1981-08-07 | Предприятие П/Я В-8857 | Apparatus for treating dispersed materials |
DE8713602U1 (en) * | 1987-10-09 | 1988-02-04 | Pfaff Rohrpost GmbH, 5600 Wuppertal | Vibrating mill |
DE102006042825A1 (en) | 2006-09-08 | 2008-03-27 | PFAFF AQS GmbH automatische Qualitätskontrollsysteme | Mahleinheit with cooling device |
DE102007017131A1 (en) | 2006-09-08 | 2008-03-27 | PFAFF AQS GmbH automatische Qualitätskontrollsysteme | Disk vibration mill, has oscillating drive fastened to holding device for transmission of forces acting parallel to vibration plane to holding device, and grinding unit mounted plane-parallel to vibration plane by using sliding guide |
DE102006042823A1 (en) | 2006-09-08 | 2008-03-27 | PFAFF AQS GmbH automatische Qualitätskontrollsysteme | Vibratory mill and method for operating a vibratory mill |
-
2008
- 2008-07-25 DE DE102008035009A patent/DE102008035009A1/en not_active Withdrawn
- 2008-09-10 WO PCT/EP2008/061981 patent/WO2009037159A1/en active Application Filing
- 2008-09-10 AT AT08803948T patent/ATE508796T1/en active
- 2008-09-10 EP EP08803948A patent/EP2185287B8/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009037159A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2185287B1 (en) | 2011-05-11 |
WO2009037159A1 (en) | 2009-03-26 |
DE102008035009A1 (en) | 2009-05-20 |
EP2185287B8 (en) | 2011-09-28 |
ATE508796T1 (en) | 2011-05-15 |
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