EP2391454B1 - Broyeur de laboratoire muni de passages tournants pour le bol de broyage à alimenter en fluide - Google Patents

Broyeur de laboratoire muni de passages tournants pour le bol de broyage à alimenter en fluide Download PDF

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Publication number
EP2391454B1
EP2391454B1 EP10701818.6A EP10701818A EP2391454B1 EP 2391454 B1 EP2391454 B1 EP 2391454B1 EP 10701818 A EP10701818 A EP 10701818A EP 2391454 B1 EP2391454 B1 EP 2391454B1
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EP
European Patent Office
Prior art keywords
laboratory mill
rotary feedthrough
mill according
grinding
stationary part
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.)
Active
Application number
EP10701818.6A
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German (de)
English (en)
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EP2391454A1 (fr
Inventor
Stefan Reinhold MÄHLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Retsch GmbH
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Retsch GmbH
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Publication date
Application filed by Retsch GmbH filed Critical Retsch GmbH
Publication of EP2391454A1 publication Critical patent/EP2391454A1/fr
Application granted granted Critical
Publication of EP2391454B1 publication Critical patent/EP2391454B1/fr
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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
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/186—Adding fluid, other than for crushing by fluid energy
    • 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
    • B02C17/04—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 with unperforated container
    • B02C17/08—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 with unperforated container with containers performing a planetary movement
    • 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

Definitions

  • the invention relates to a laboratory mill having at least one rotary motion about its central axis performing Mahlbecher, wherein the Mahlbecher is connected to at least one line for passage of a liquid or gaseous medium, wherein the line via a rotary feedthrough with a stationary part and one to the movement of the Mahlbechers coupled moving part is guided.
  • a laboratory mill with the aforementioned features is known from GB 2 257 379 A known.
  • This laboratory mill is set up for grinding down a suspension containing the particles to be ground, the suspension also being supplied continuously from the tank via a stationary line to the rotating grinding bowl during the grinding process.
  • a rotary feedthrough is formed between the stationary line and arranged on the Mahlbecher supply by the end of the stationary line is brought as a stationary part in a sliding connection with the end of a coupled to the rotational movement of the Mahlbechers movable nozzle.
  • a mill is described with a grinding vessel, the jacket is cooled by supplying a coolant. Again, the coolant is fed from a stationary line in a rotating with the grinding vessel line section by means of a rotary feedthrough.
  • gases are released during the comminution of the ground material, which may be the subject of further analysis. These gases must therefore be continuously removed from the grinding bowl and it must be compensated for the extracted volume by a corresponding gas supply.
  • the invention provides in its basic idea that two lines for feeding and discharging the medium are connected to each grinding bowl and both lines are guided over the rotary feedthrough, wherein on the stationary part two external connections for the fixed lines and to the moving part of the rotary feedthrough two internal connections are formed for the lines leading to the grinding bowl.
  • the invention has the advantage that the connection of the grinding bowl with the supply or discharge line for the medium can be made via a substantially rigid conduit system, because the relative movement between the movable grinding bowl and the stationary supply or disposal system on the relative to stationary part movable movable part of the intermediate rotary feedthrough is compensated.
  • the respective movements occur within the rotary feedthrough reduces a smallest possible radius, so that because of the so minimized relative speed and relative movement between the stationary and the movable part of the rotary feedthrough a contact seal can be used, which is effective between the mutually aligned bore portions in the stationary as in the moving part of the rotary feedthrough.
  • both in the stationary part and in the movable part of the rotary feedthrough bores for the passage of the medium through the rotary feedthrough are formed and the holes in the stationary part and in the movable part each having a mutually aligned, extending in the axis of movement of the movable part section
  • the mutually aligned portions of the holes formed in the rotary feedthrough are each sealed between the stationary part and the movable part against each other.
  • a protruding proboscis is formed, which engages positively in a formed in the stationary part receptacle, wherein between the trunk and receiving a seal is arranged.
  • laboratory mills include a plurality of grinding bowls, according to one embodiment of the invention it is provided that correspondingly a plurality of grinding bowls can be provided, to each of which then a rotary feedthrough is assigned.
  • the at least one line connected to the grinding bowl holder and the Mahlbecherhalterung is fluidly connected to the grinding bowl. Accordingly, then the rotary feedthrough of grinding bowl holder is assigned.
  • the grinding bowls can perform different movements in different types of laboratory mills, according to one embodiment of the invention, it is provided that the grinding bowls perform only a pitch circle movement. Since in such an embodiment, the relative movement of the movable part of the rotary feedthrough is limited to the stationary part, may be provided in such an embodiment of the laboratory mill, that the formed on the stationary part of the terminals with the terminals on the movable part, is connected via flexible line sections ,
  • the grinding bowls execute a rotational movement in the associated holder, wherein accordingly a rotational movement has to be set up for the movable part of the rotary feedthrough.
  • the grinding bowls rotate with their central axis about a device axis spaced therefrom, wherein each rotation axis is associated with a rotary feedthrough.
  • a planetary mill is characterized in which the grinding cup concentrically rotates about the central axis of the planetary disc, while at the same time this planetary disc rotates about the center of the sun gear. In such superimposed circular movements then at least one rotary union must be used per rotation center.
  • the medium is a liquid nitrogen or that the liquid or gaseous medium used is tempered, for example to produce a heating or cooling effect for the grinding bowl, or that the medium consists of a special analysis gas.
  • FIG. 1 shows, the laboratory mill 10 shown only schematically a grinding bowl 11, to which a supply line 12 and a return line 13 are connected to supply the grinding bowl 11 with liquid nitrogen.
  • the conduits 12 and 13 are guided with respect to the movement of the grinding bowl 11 via a rotary feedthrough 14 with a stationary part 15 and a movable part 16.
  • the stationary part 15 consists of two, the movable part 16 between them enclosing parts 15a, 15b, which are held on a non-illustrated here, to be connected to the housing of the laboratory mill 10 holder to each other.
  • two holes 17 a and 17 b are formed, wherein the bore 17 a to the feed line 12 and the bore 17 b are connected to the return line 13.
  • the bores 17a and 17b bend outward by 90 degrees and here they find a connection to boreholes 18a and 18b respectively formed in the stationary parts 15a and 15b the mutually aligned line sections of the bores 17a and 18a or 17b and 18b are arranged in the axis of movement of the movable part 16 relative to the stationary part 15.
  • the supply line 19 is connected, which comes from a reservoir 21 for the liquid nitrogen, wherein in the supply line 19 corresponding valves 20 are turned on with control and safety functions.
  • the reservoir 21 is liquid nitrogen with a liquid level 22 at.
  • a return line 23 is connected, which is guided to a collecting vessel 24, in which also liquid nitrogen with a liquid level 25 is.
  • FIG. 2 The formation of the corresponding rotary feedthrough 14 in conjunction with the laboratory mill 10 is off FIG. 2 seen.
  • the supply line 19 for the liquid nitrogen is shown, which is connected via a correspondingly arranged valve 20 to a terminal 118a of the stationary part 15 of the rotary feedthrough 14.
  • a holder 30 connected to the housing of the laboratory mill 10. Accordingly, from the stationary part 15b or from its connection 118b, the return line 23 to the collecting vessel 24 from.
  • FIG. 2 is the movable part 16 with its terminals 117 a and 117 b for the connected lines, namely the supply line 12 and the Recirculation 13 recognizable, both of which are guided to a Mahlbecherhalterung 26 and connected thereto.
  • the Mahlbecherhalterung 26 is attached to a rotatably mounted rocker 27 and performs an oscillating movement about the movement axis 28;
  • the grinding-body movement is generated in the interior of a grinding bowl, which is not shown in detail and is inserted into the grinding bowl holder 26, which is fluidically connected to the grinding bowl holder 26.
  • the rotary feedthrough 14 is arranged so that its center or the mutually aligned bore portions 17a, 18a and 17b, 18b are aligned with the extended movement axis 28.
  • the liquid nitrogen is passed through the supply line 19 and the switching valve 20 and via the port 118a in the rotary feedthrough 14 and leaves the rotary feedthrough 14 via the connected to the terminal 117a of the movable member 16 feed line 12.
  • the nitrogen flow is to Mahlbecherhalterung 26 and from there again led back to the movable part 16 of the rotary feedthrough 14 and finally passes through the stationary part 15 of the rotary feedthrough 14 and the connected return line 23 into the collecting vessel 24.
  • the Switching valve 20 closed. After so much nitrogen has evaporated that the sensor is no longer wetted with, the switching valve 20 is opened again.
  • the movable part 16 in each case with a radially protruding proboscis 32, engages in a receptacle 33 formed on the two stationary parts 15a and 15b, a radial sealing ring 34 being arranged in the receptacle 33, which holds the proboscis 32 of the movable part 16 encloses and with its sealing lip the stationary part 15a and 15b relative to the movable part 16 seals.
  • this seal is formed in a radial arrangement, the seal can also be made on the front side.
  • no holes are formed in the interior of stationary part 15 and movable part 16, but the associated terminals 118a, 118b for the supply line 19 and return line 23 to the stationary parts 15a, 15b on the one hand and the terminals 117a, 117b for the Supply line 12 and the return line 13 on the movable part 16 on the other hand by flexible line sections 35, for example hose connections connected;
  • flexible line sections 35 for example hose connections connected

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Claims (15)

  1. Broyeur de laboratoire (10) comprenant au moins un bol de broyage (11) effectuant un mouvement rotatif autour de son axe central, le bol de broyage (11) étant raccordé à au moins une conduite (19, 12) pour transporter un fluide liquide ou gazeux, la conduite (19, 12) étant guidée via un passage tournant (14) avec une partie immobile (15) et une partie mobile (16) couplée au mouvement du bol de broyage (11), caractérisé en ce que sur chaque bol de broyage (11), deux conduites (12, 13) sont raccordées pour amener et pour évacuer le fluide et ces deux conduites (12, 13) sont guidées via le passage tournant (14), sur la partie immobile (15), deux raccords externes (118a, 118b) étant conçus pour les conduites fixes (19, 23) et, sur la partie mobile (16) du passage tournant (14), deux raccords internes (117a, 117b) étant conçus pour les conduites (12, 13) menant jusqu'au bol de broyage (11).
  2. Broyeur de laboratoire selon la revendication 1, caractérisé en ce que des alésages (17, 18) pour transporter le fluide dans le passage tournant (14) sont formés non seulement dans la partie immobile (15) mais aussi dans la partie mobile (16) du passage tournant (14) et les alésages (18) dans la partie immobile (15) et dans la partie mobile (16) présentent respectivement un segment qui est aligné avec l'autre et qui s'étend dans l'axe de mouvement de la partie mobile (16).
  3. Broyeur de laboratoire selon la revendication 2, caractérisé en ce que les segments mutuellement alignés des alésages (17, 18) formés dans le passage tournant (14) sont respectivement scellés l'un contre l'autre entre la partie immobile (15) et la partie mobile (16).
  4. Broyeur de laboratoire selon la revendication 3, caractérisé en ce qu'un nez saillant (32) est formé sur la partie mobile (16) du passage tournant (14), dans le prolongement du segment aligné de l'alésage (17, 18), ledit nez venant en prise par complémentarité de forme dans un creux (33) formé dans la partie immobile (15), un joint d'étanchéité (34) étant agencé entre le nez (32) et le creux (33).
  5. Broyeur de laboratoire selon la revendication 3 ou 4, caractérisé en ce que la partie immobile (15) du passage tournant (14) est scellée radialement par rapport à la partie mobile (16).
  6. Broyeur de laboratoire selon la revendication 3 ou 4, caractérisé en ce que la partie immobile (15) du passage tournant (14) est scellée frontalement contre la partie mobile (16).
  7. Broyeur de laboratoire selon l'une des revendications 1 à 6, caractérisé en ce qu'une pluralité de bols de broyage (11) est agencée de manière à ce qu'un passage tournant (14) soit associé à chaque bol de broyage (11).
  8. Broyeur de laboratoire selon l'une des revendications 1 à 7, caractérisé en ce que les bols de broyage (11) sont fixés dans des supports (26) de bols de broyage agencés sur le broyeur de laboratoire (10) et effectuant pour leur part le mouvement de rotation, la ou les conduites étant raccordées au support (26) de bol de broyage et le support (26) de bol de broyage étant en communication fluidique avec le bol de broyage (11).
  9. Broyeur de laboratoire selon l'une des revendications 1 à 8, caractérisé en ce que les bols de broyage (11) effectuent un mouvement en arc de cercle.
  10. Broyeur de laboratoire selon la revendication 9, caractérisé en ce que les raccords (118a, 118b) formés sur la partie immobile (15) sont reliés aux raccords (117a, 117b) formés sur la partie mobile (16) via des segments de conduite (35) flexibles.
  11. Broyeur de laboratoire selon l'une des revendications 1 à 8, caractérisé en ce que les bols de broyage (11) effectuent un mouvement de rotation.
  12. Broyeur de laboratoire selon l'une des revendications 1 à 8, caractérisé en ce que les bols de broyage (11), avec leur axe central, tournent autour d'un axe de dispositif qui en est éloigné, chaque axe de rotation étant respectivement associé à un passage tournant (14).
  13. Broyeur de laboratoire selon l'une des revendications 1 à 12, caractérisé en ce que le fluide est l'azote liquide.
  14. Broyeur de laboratoire selon l'une des revendications 1 à 12, caractérisé en ce que le fluide liquide ou gazeux est tempéré.
  15. Broyeur de laboratoire selon l'une des revendications 1 à 12, caractérisé en ce que le fluide est un gaz d'analyse.
EP10701818.6A 2009-01-28 2010-01-26 Broyeur de laboratoire muni de passages tournants pour le bol de broyage à alimenter en fluide Active EP2391454B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009006500 2009-01-28
PCT/EP2010/000427 WO2010086132A1 (fr) 2009-01-28 2010-01-26 Broyeur de laboratoire muni de passages tournants pour le bol de broyage à alimenter en fluide

Publications (2)

Publication Number Publication Date
EP2391454A1 EP2391454A1 (fr) 2011-12-07
EP2391454B1 true EP2391454B1 (fr) 2019-06-12

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ID=42144787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10701818.6A Active EP2391454B1 (fr) 2009-01-28 2010-01-26 Broyeur de laboratoire muni de passages tournants pour le bol de broyage à alimenter en fluide

Country Status (6)

Country Link
US (1) US8720806B2 (fr)
EP (1) EP2391454B1 (fr)
JP (1) JP2012516236A (fr)
CN (1) CN102369061B (fr)
RU (1) RU2501607C2 (fr)
WO (1) WO2010086132A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021043854A1 (fr) 2019-09-06 2021-03-11 Retsch Gmbh Broyeur vibrant de laboratoire
WO2021043739A1 (fr) 2019-09-06 2021-03-11 Retsch Gmbh Broyeur de laboratoire
DE102020119489A1 (de) 2020-02-07 2021-08-12 Retsch Gmbh Gerätemodul für ein Laborgerät und Verfahren zur Temperierung eines Laborgerätes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103861696A (zh) * 2012-12-12 2014-06-18 江苏森美铝颜料有限公司 一种球磨机的加气系统
CN103861699A (zh) * 2012-12-12 2014-06-18 江苏森美铝颜料有限公司 一种增压出料系统
US10518269B2 (en) 2017-10-13 2019-12-31 SPEX SamplePrep, LLC Grinding mill with securing frame
RU2760394C1 (ru) * 2020-11-23 2021-11-24 Федеральное государственное бюджетное образовательное учреждение высшего образования «Пензенский государственный университет» (ФГБОУ ВО «Пензенский государственный университет») Способ измельчения материалов в центробежной планетарной мельнице

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021043854A1 (fr) 2019-09-06 2021-03-11 Retsch Gmbh Broyeur vibrant de laboratoire
WO2021043739A1 (fr) 2019-09-06 2021-03-11 Retsch Gmbh Broyeur de laboratoire
DE102020119489A1 (de) 2020-02-07 2021-08-12 Retsch Gmbh Gerätemodul für ein Laborgerät und Verfahren zur Temperierung eines Laborgerätes
WO2021156285A1 (fr) 2020-02-07 2021-08-12 Retsch Gmbh Module de dispositif pour un dispositif de laboratoire et procédé de thermorégulation d'un dispositif de laboratoire

Also Published As

Publication number Publication date
JP2012516236A (ja) 2012-07-19
US20110303776A1 (en) 2011-12-15
RU2011130596A (ru) 2013-01-27
CN102369061B (zh) 2014-01-29
RU2501607C2 (ru) 2013-12-20
EP2391454A1 (fr) 2011-12-07
WO2010086132A1 (fr) 2010-08-05
CN102369061A (zh) 2012-03-07
US8720806B2 (en) 2014-05-13

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