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EP2666562B1 - Regeneration device - Google Patents

Regeneration device Download PDF

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Publication number
EP2666562B1
EP2666562B1 EP12004128.0A EP12004128A EP2666562B1 EP 2666562 B1 EP2666562 B1 EP 2666562B1 EP 12004128 A EP12004128 A EP 12004128A EP 2666562 B1 EP2666562 B1 EP 2666562B1
Authority
EP
European Patent Office
Prior art keywords
opening
container
regeneration device
bearing
flange
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
EP12004128.0A
Other languages
German (de)
French (fr)
Other versions
EP2666562A1 (en
Inventor
Mark Thienel
Domnick Dr. Dipl. -Ing. Dielmar
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.)
DOMNICK Verfahrens- und Anlagetechnik
Technofond Giessereihilfsmittel GmbH
Original Assignee
DOMNICK Verfahrens- und Anlagetechnik
Technofond Giessereihilfsmittel GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to PL12004128T priority Critical patent/PL2666562T3/en
Application filed by DOMNICK Verfahrens- und Anlagetechnik, Technofond Giessereihilfsmittel GmbH filed Critical DOMNICK Verfahrens- und Anlagetechnik
Priority to EP12004128.0A priority patent/EP2666562B1/en
Priority to CN201380027496.5A priority patent/CN104379274B/en
Priority to KR1020147036408A priority patent/KR101645116B1/en
Priority to PCT/EP2013/001367 priority patent/WO2013174479A1/en
Priority to JP2015513037A priority patent/JP2015517409A/en
Publication of EP2666562A1 publication Critical patent/EP2666562A1/en
Application granted granted Critical
Publication of EP2666562B1 publication Critical patent/EP2666562B1/en
Priority to US14/552,675 priority patent/US20150083837A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or armsĀ 
    • B01F27/906—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or armsĀ  with fixed axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B01F35/412—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting both extremities of the shaft
    • B01F35/4121—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting both extremities of the shaft at the top and at the bottom of the receptacle, e.g. for performing a conical orbital movement about a vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/044—Devices having a vertical stirrer shaft in a fixed receptacle

Definitions

  • the invention relates to a regeneration device according to the preamble of patent claim 1.
  • the object of the invention is to provide a device which further develops the prior art.
  • a regeneration apparatus for treating foundry old sands, the regeneration apparatus comprising a cylindrical container having a lid and a bottom and the container having a first opening and / or a second opening and a plurality of rotationally driven ones in the container formed frictional elements are provided and the friction elements are arranged on a first shaft, and a first formed on the first shaft first bearing is provided, and the first shaft has a spaced from the first bearing second bearing and the friction elements between the first bearing and the second Bearings are arranged and the container at the top has a first flange and at the bottom a second flange, wherein the first flange is frictionally connected to the lid and the second flange non-positively connected to the ground.
  • foundry sand used in particular refers to that sand which forms the casting molds for a metal casting.
  • the main components of the used sand are, in particular, the additives such as organic or inorganic binders and substances for increasing the thermal conductivity. Due to the addition of the aggregates, the used sand can not be used again in the foundry without treatment and must be disposed of. In addition to the significant environmental impact for the transport of large quantities of sand, additional significant disposal costs.
  • the shaft is preferably brought to a certain speed by an electric motor during or after the filling of the container with waste sand.
  • the friction elements arranged on the shaft perform crescent-shaped movements and transfer part of the mechanical energy into the sand to be regenerated.
  • the sand is regenerated and can be removed.
  • the degree of regeneration is above 60%, preferably above 85% and most preferably above 95%.
  • the degree of regeneration here is understood to mean the weight ratio of filled used sand to regenerated matter.
  • a batch operation ie supply of the total amount of regenerating sand at the beginning of the workup and removal of the regenerated amount of sand at the end of the workup is particularly advantageous and leads to the highest levels of regeneration.
  • inorganic bound sands can be achieved in addition to degrees of regeneration above 95% after the workup of used sand each new sand quality. It turned out that even a repeated workup leads to no loss of quality and the used sand can be worked up as often as desired.
  • the cover is connected by means of a first screw connection to the first flange and the bottom to a second screw connection to the second flange.
  • the parts can be easily disassembled and perform a revision of the system quickly and inexpensively.
  • the relays disposed on the shaft and the shaft itself are subject to closure and should be replaced from time to time.
  • the first bearing is flanged to the top of the lid, preferably secured by means of screw non-positively on the lid.
  • the first opening is designed as a filling device and / or as an exhaust air opening and the second opening as an outlet device and / or as a supply air opening.
  • the quality of the regenerate can be increased if a part of the fine dust formed during the treatment can be applied via the exhaust air opening.
  • a third opening which is at a distance from the first opening and which is designed as an exhaust air device
  • a fourth exhaust air opening which is at a distance from the second opening and which is designed as a supply air device.
  • the bottom is formed as a Anstrƶmkasten, wherein the Anstrƶmkasten relative to the container by means of a nozzle plate is delimited.
  • the fourth opening ie the supply air opening on the inflow box, in particular it is advantageous to form the fourth opening on an underside of the floor, preferably in the middle or in the vicinity of the center of the floor.
  • the first opening and the second opening are formed directly on the container and have a nozzle-shaped design on the outside of the container.
  • one or more temperature sensors are arranged on the container in order to determine the temperature of the sand.
  • hole-like formations for receiving the temperature sensors are provided in the container wall. It has been found that for a rapid and reliable determination of the sand temperature during the regeneration process, it is advantageous to guide the temperature sensors through the container wall and to attach them to the inside of the container.
  • the sensors are fastened to the container wall at different vertical positions. Studies have shown that the quality of the treated sand and the degree of regeneration depend, inter alia, on the duration of the regeneration and in particular on the continuous temperature-time profile in the regeneration, ie in the treatment.
  • the control unit can be connected to both at the connect first shut-off device formed as well as with a shut-off device formed on the second opening to allow automatic loading and unloading of the container. Automation can improve the quality of the regrind.
  • the second bearing forms a frictional connection with the ground. Furthermore, it is advantageous if the base has a first shape and the first shape receives the second bearing, so that the second bearing is arranged outside the housing outside. This increases the ease of maintenance of the system. It has been found that due to the high mechanical forces which are exposed to the bearings, it is advantageous if the first bearing and the second bearing each have a grease nipple to simply grease the bearings can.
  • a second shaft is provided with second friction strips.
  • this ensures uniform mixing and preparation.
  • this places high demands on the imbalance and the stability of the waves.
  • FIG. 1 shows a schematic cross section of a regeneration device 5 according to the invention, designed for the treatment of foundry old sands, with a cylindrical container 10 with a lid 12 and a bottom 14, a plurality of rotationally driven in the container 10 formed on a first shaft 30 arranged friction elements 40.
  • the longitudinal axis of the first shaft 30 is substantially aligned, preferably exactly parallel to the longitudinal axis of the container 10.
  • a drive in the form of an electric motor 20 and a first bearing 22 are arranged on the upper side of the shaft 30.
  • the second bearing 25 forms with the bottom 14 a frictional connection.
  • Both the first bearing 22 and the second bearing 25 each have a lubricating nipple 26.
  • the friction elements 40 are disposed between the first bearing 22 and the second bearing 25 within the container 10.
  • the container 10 has a first flange 42 and on the underside a second flange 44, wherein the first flange 42 frictionally with the cover 12 and the second flange 44 is frictionally connected to the bottom 14.
  • the container 10 On the outside, the container 10 has two receptacles 50 for temperature sensors.
  • the receptacles 50 each have recesses in the container wall, so that the temperature sensors measure the temperature within the container.
  • the container 10 has a first opening 60, which is designed as Eln Stirllvorrlchtung and a second opening 70, which is designed as an outlet device and a third opening 80, which is designed as an exhaust device or as an exhaust port on.
  • the first opening 60, the second opening 70 and the third opening 80 have on the outside of the container 10 a nozzle-like design.
  • Automatic shut-off devices 110 are provided both at the first opening 60 and at the second opening 70.
  • the cover 12 is connected in each case by means of a first screw 82 with the first flange 42 and the bottom 14 with a second screw 84 with the second flange 14 each frictionally engaged and each easily. Furthermore, the first bearing 22 is flanged to the cover 12. The first bearing 22 is covered with a sleeve. The sleeve is connected at the bottom with a third screw 86 with the cover 12 and at the top by means of a fourth screw 88 with the electric motor. In order to monitor the rotational speed of the shaft 30, a frequency converter 100 is provided. At the exhaust port, a suction device can be attached to create a slight negative pressure in the container 10 and to suck the resulting dust. By the first opening 60 and the second opening 70 are not made airtight air flows through both openings 60, 70 air.
  • the bottom 14 is formed as a Anstrƶmkasten, wherein the Anstrƶmkasten opposite the container 10 is delimited by means of a nozzle plate 115 and the fourth opening 125 is formed on the underside of the bottom 14 as Zu Kunststoffƶ rĆ©elle or supply air to the inflow. Furthermore, the Anstrƶmkasten an inspection opening 127 for lubricating the second bearing 25 on. the nozzle bottom 115 has a plurality of holes through which the supplied air flows. As a result, the sand is also held in suspension during regeneration.
  • a third embodiment of the regeneration device 5 is shown.
  • a second shaft 130 is provided with second friction strips 140.
  • the bottom 14 now has a first shape, wherein the first shape receives the second bearing 25, so that the second bearing 25 are arranged outside the housing outside.
  • a deflecting strip is provided on the inside of the container 10 is not shown.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Rolling Contact Bearings (AREA)
  • Processing Of Solid Wastes (AREA)
  • Accessories For Mixers (AREA)
  • Centrifugal Separators (AREA)
  • Sliding-Contact Bearings (AREA)
  • General Details Of Gearings (AREA)

Description

Die Erfindung betrifft eine Regenerationsvorrichtung gemƤƟ dem Oberbegriff des Patentanspruchs 1.The invention relates to a regeneration device according to the preamble of patent claim 1.

Aus der EP 0 343 272 A1 ist eine Regenerationsvorrichtung und ein Verfahren zur Aufbereitung von GieƟereisanden bekannt. Hierbei wird der Sand chargenweise in einen BehƤlter eingefĆ¼llt und mittels Reibelementen mechanisch aufbereitet. Des Weiteren ist aus der US 2006 / 0176 773 A1 eine Mischvorrichtung bekannt.From the EP 0 343 272 A1 For example, a regeneration device and a method for processing foundry sand is known. Here, the sand is filled in batches in a container and mechanically processed by means of friction elements. Furthermore, from the US 2006/0176 773 A1 a mixing device known.

Vor diesem Hintergrund besteht die Aufgabe der Erfindung darin, eine Vorrichtung anzugeben, die den Stand der Technik weiterbildet.Against this background, the object of the invention is to provide a device which further develops the prior art.

Die Aufgabe wird durch eine Regenerationsvorrichtung mit den Merkmalen des Patentanspruchs 1 gelƶst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand von UnteransprĆ¼chen.The object is achieved by a regeneration device having the features of patent claim 1. Advantageous embodiments of the invention are the subject of dependent claims.

GemƤƟ dem Gegenstand der Erfindung wird eine Regenerationsvorrichtung ausgebildet zur Aufbereitung von GieƟerei-Altsanden bereitgestellt, wobei die Regenerationsvorrichtung einen zylinderfƶrmigen BehƤlter mit einem Deckel und einen Boden umfasst und der BehƤlter eine erste Ɩffnung und / oder eine zweite Ɩffnung aufweist und mehrere rotierend angetriebene in dem BehƤlter ausgebildete Reibelemente vorgesehen sind und die Reibelemente an einer ersten Welle angeordnet sind, und ein erstes an der ersten Welle ausgebildetes erstes Lager vorgesehen ist, und die erste Welle ein von dem ersten Lager beabstandetes zweites Lager aufweist und die Reibelemente zwischen dem ersten Lager und dem zweiten Lager angeordnet sind und der BehƤlter an der Oberseite einen ersten Flansch und an der Unterseite einen zweiten Flansch aufweist, wobei der erste Flansch kraftschlĆ¼ssig mit dem Deckel und der zweite Flansch kraftschlĆ¼ssig mit dem Boden verbunden ist.According to the subject invention, a regeneration apparatus is provided for treating foundry old sands, the regeneration apparatus comprising a cylindrical container having a lid and a bottom and the container having a first opening and / or a second opening and a plurality of rotationally driven ones in the container formed frictional elements are provided and the friction elements are arranged on a first shaft, and a first formed on the first shaft first bearing is provided, and the first shaft has a spaced from the first bearing second bearing and the friction elements between the first bearing and the second Bearings are arranged and the container at the top has a first flange and at the bottom a second flange, wherein the first flange is frictionally connected to the lid and the second flange non-positively connected to the ground.

Es versteht sich, dass mit dem Begriff des GieƟerei-Altsands insbesondere derjenige Sand bezeichnet wird, der die GieƟformen fĆ¼r einen Metallguss ausbildet. Hauptgemengetelles des Altsands sind neben den Quarzkƶrnen, die sich einer bestimmten KorngrĆ¶ĆŸenfraktion zuordnen lassen, insbesondere die Zuschlagsstoffen wie organische oder anorganische Bindemittel und Stoffe zur Erhƶhung der WƤrmeleitfƤhigkeit. Durch die Beigabe der Zuschlagsstoffe lƤsst sich der Altsand ohne Aufbereitung nicht nochmals in der GieƟerei verwenden und muss einer Entsorgung zugefĆ¼hrt werden. Neben der erheblichen Umweltbelastung fĆ¼r den Transport der groƟen Sandmengen, entstehen zusƤtzlich erhebliche Endlagerungskosten.It is understood that the term foundry sand used in particular refers to that sand which forms the casting molds for a metal casting. In addition to the quartz grains, which can be assigned to a specific particle size fraction, the main components of the used sand are, in particular, the additives such as organic or inorganic binders and substances for increasing the thermal conductivity. Due to the addition of the aggregates, the used sand can not be used again in the foundry without treatment and must be disposed of. In addition to the significant environmental impact for the transport of large quantities of sand, additional significant disposal costs.

Es sei angemerkt, dass an dem BehƤlter wenigstens eine Ɩffnung zum Beladen des BehƤlters mit Altsand und zur Entnahme des regenerierten Sandes vorgesehen ist. Der regenerierte Sand wird auch als Regenerat bezeichnet. FĆ¼r eine Regernation des Sandes wird bei bzw. nach der BefĆ¼llung des BehƤlters mit Altsand, die Welle vorzugsweise von einem Elektromotor auf eine bestimmte Drehzahl gebracht. Hierdurch vollfĆ¼hren die an der Welle angeordneten Reibelemente krelsfƶrmige Bewegungen und Ć¼bertragen ein Teil der mechanlschen Energie in den zu regenerierenden Sand. Je nach Umdrehungszahl der Welle und Dauer wird der Sand dabei erhitzt und in dem BehƤlter in der Schwebe gehalten. Nach einem Zeitintervall ist der Sand regeneriert und lƤsst sich entnehmen. Um die Handhabung zu erleichtern ist es, an dem BehƤlter eine erste Ɩffnung zur ZufĆ¼hrung des Altsandes und eine zweite, von der ersten Ɩffnung beabstandeten zweite Ɩffnung zur Entnahme des Regenerats vorzusehen. Ein Vorteil der Ausbildung von zwei Ɩffnungen ist es, dass ohne Drehung des BehƤlters sich auf einfache Weise der Altsand dem BehƤlter zufĆ¼hren und das Regenerat aus dem BehƤlter entnehmen lassen. Auch hat sich gezeigt, dass durch die wenigstens zweifache Lagerung der Welle die StabilitƤt der Regenerationsvorrichtung erheblich steigern lƤsst.It should be noted that at least one opening for loading the container with waste sand and for removing the regenerated sand is provided on the container. The regenerated sand is also called regeneration. For a regernation of the sand, the shaft is preferably brought to a certain speed by an electric motor during or after the filling of the container with waste sand. As a result, the friction elements arranged on the shaft perform crescent-shaped movements and transfer part of the mechanical energy into the sand to be regenerated. Depending on the number of revolutions of the shaft and duration of the sand is heated and held in the container in suspension. After a time interval, the sand is regenerated and can be removed. In order to facilitate handling it is to provide on the container a first opening for supplying the used sand and a second, spaced from the first opening second opening for removal of the regenerate. An advantage of the formation of two openings is that, without rotation of the container, the old sand can easily be fed to the container and the regenerated material can be removed from the container. It has also been found that the stability of the regeneration device can be considerably increased by the at least double bearing of the shaft.

Ein anderer Vorteil der erfindungsgemƤƟen Vorrichtung ist es, dass sich die Altsande nahezu vollstƤndig regenerieren lassen. Der Regenerlerungsgrad liegt oberhalb 60%, vorzugsweise oberhalb 85% und hƶchst vorzugsweise oberhalb 95%. Unter dem Grad der Regenerierung wird hierbei das GewichtsverhƤltnis von eingefĆ¼lltem Altsand zu Regenerat verstanden. Untersuchungen haben gezeigt, dass ein Chargenbetrieb, d.h. ZufĆ¼hrung der zur gesamten regenerierenden Sandmenge am Beginn der Aufarbeitung und Entnahme der regenerierten Sandmenge am Ende der Aufarbeitung besonders vorteilhaft ist und zu hƶchsten Regenerierungsgraden fĆ¼hrt. Insbesondere bei der Aufarbeitung von sogenannten anorganisch gebundenen Sanden lƤsst sich neben Regenerierungsgraden oberhalb 95% nach der Aufarbeitung des Altsandes jeweils NeusandqualitƤt erreichen. Es zeigte sich, dass auch eine wiederholte Aufarbeitung zu keinen QualitƤtseinbuƟen fĆ¼hrt und der Altsand sich beliebig oft aufarbeiten lƤsst.Another advantage of the device according to the invention is that the used sands can be almost completely regenerated. The degree of regeneration is above 60%, preferably above 85% and most preferably above 95%. The degree of regeneration here is understood to mean the weight ratio of filled used sand to regenerated matter. Studies have shown that a batch operation, ie supply of the total amount of regenerating sand at the beginning of the workup and removal of the regenerated amount of sand at the end of the workup is particularly advantageous and leads to the highest levels of regeneration. In particular, in the processing of so-called inorganic bound sands can be achieved in addition to degrees of regeneration above 95% after the workup of used sand each new sand quality. It turned out that even a repeated workup leads to no loss of quality and the used sand can be worked up as often as desired.

In einer Weiterbildung sind der Deckel mittels einer ersten Schraubverbindung mit dem ersten Flansch und der Boden mit einer zweiten Schraubverbindung mit dem zweiten Flansch verbunden. Hierdurch lassen sich die Teile einfach zerlegen und eine Revision an der Anlage schnell und kostengĆ¼nstig durchfĆ¼hren. Insbesondere unterliegen die an der Welle angeordneten Relbelemente und die Welle selbst, einem VerschlieƟ und sollten von Zeit zu Zeit ausgewechselt werden. In einer anderen Welterbildung ist das erste Lager an der Oberseite des Deckels angeflanscht, vorzugsweise mittels Schraubverbindungen kraftschlĆ¼ssig an dem Deckel befestigt.In a development, the cover is connected by means of a first screw connection to the first flange and the bottom to a second screw connection to the second flange. As a result, the parts can be easily disassembled and perform a revision of the system quickly and inexpensively. In particular, the relays disposed on the shaft and the shaft itself are subject to closure and should be replaced from time to time. In another world formation the first bearing is flanged to the top of the lid, preferably secured by means of screw non-positively on the lid.

GemƤƟ einer bevorzugten AusfĆ¼hrungsform ist die erste Ɩffnung als EinfĆ¼llvorrichtung und / oder als Abluftƶffnung und die zweite Ɩffnung als Auslassvorrichtung und / oder als Zuluftƶffnung ausgebildet. Untersuchungen haben gezeigt, dass sich die QualitƤt des Regenerats steigern lƤsst, wenn sich ein Teil des wƤhrend des Aufbereitens gebildeten Feinstaubes Ć¼ber die Abluftƶffnung ausbringen lƤsst. HierfĆ¼r ist es vorteilhaft, eine von der ersten Ɩffnung beabstandete dritte als Abluftvorrichtung ausgebildete Ɩffnung und / oder eine vierte von der zweiten Ɩffnung beabstandete als Zuluftvorrichtung ausgebildete Abluftƶffnung vorzusehen. Insbesondere wenn zusƤtzlich zu der Abluftƶffnung auch eine Zuluftƶffnung ausgebildet wird, lƤsst sich besonders viel des anfallenden Feinstaubes aus dem Sand zu entfernen.According to a preferred embodiment, the first opening is designed as a filling device and / or as an exhaust air opening and the second opening as an outlet device and / or as a supply air opening. Studies have shown that the quality of the regenerate can be increased if a part of the fine dust formed during the treatment can be applied via the exhaust air opening. For this purpose, it is advantageous to provide a third opening which is at a distance from the first opening and which is designed as an exhaust air device, and / or a fourth exhaust air opening which is at a distance from the second opening and which is designed as a supply air device. In particular, if in addition to the exhaust opening and a supply air opening is formed, it is possible to remove a great deal of the resulting particulate matter from the sand.

In einer anderen AusfĆ¼hrungsform ist der Boden als Anstrƶmkasten ausgebildet, wobei der Anstrƶmkasten gegenĆ¼ber dem BehƤlter mittels eines DĆ¼senbodens abgegrenzt ist. Es ist vorteilhaft die vierte Ɩffnung, d. h. die Zuluftƶffnung an dem Anstrƶmkasten auszubilden, insbesondere ist es vorteilhaft die vierte Ɩffnung an einer Unterseite des Bodens, vorzugsweise in der Mitte oder in der NƤhe der Mitte des Bodens auszubilden. Des Weiteren ist es vorteilhaft, wenn die erste Ɩffnung und die zweite Ɩffnung unmittelbar an dem BehƤlter ausgebildet sind und an der AuƟenseite des BehƤlters eine stutzenfƶrmige Ausbildung aufweisen.In another embodiment, the bottom is formed as a Anstrƶmkasten, wherein the Anstrƶmkasten relative to the container by means of a nozzle plate is delimited. It is advantageous to form the fourth opening, ie the supply air opening on the inflow box, in particular it is advantageous to form the fourth opening on an underside of the floor, preferably in the middle or in the vicinity of the center of the floor. Furthermore, it is advantageous if the first opening and the second opening are formed directly on the container and have a nozzle-shaped design on the outside of the container.

GemƤƟ einer bevorzugten Weiterbildung sind an dem BehƤlter ein oder mehrere Temperatursensoren angeordnet, um die Temperatur des Sandes zu bestimmen. In einer anderen Weiterbildung sind in der BehƤlterwand lochartige Ausformungen fĆ¼r die Aufnahme der Temperatursensoren vorgesehen. Es hat sich gezeigt, dass fĆ¼r eine schnelle und zuverlƤssige Bestimmung des Sandtemperatur wƤhrend des Regenerationsprozesses es vorteilhaft ist, die die Temperatursensoren durch die BehƤlterwand zu fĆ¼hren und an der Innenseite des BehƤlters anzubringen. In einer anderen Weiterbildung werden die Sensoren an unterschiedlichen vertikalen Positionen an der BehƤlterwand befestigt. Untersuchungen haben gezeigt, das die QualitƤt des aufbereiteten Sandes sowie der Regenerationsgrad unter anderem von der Zeitdauer der Regeneration und insbesondere von dem durchlaufenden Temperatur-Zeit Profil bei der Regeneration, d.h. bei der Aufbereitung abhƤngen. Des Weiteren ist es vorteilhaft, die Umdrehungszahl der Welle, vorzugsweise mittels eines Frequenzumrichters, zu bestimmen und gegebenenfalls zu verƤndern. Hierdurch lƤsst sich die Temperatur des Sandes in dem BehƤlter sowohl erniedrigen als auch erhƶhen. Insbesondere ist es vorteilhaft, ein programmierbares SteuergerƤt zu verwenden, um anhand der gemessenen Temperatur des Sandes und der Zeitdauer die Umdrehungszahl der Welle durch Ansteuerung des Elektromotors zu regeln. Es hat sich gezeigt, dass bei einem gegebenen FĆ¼llmenge und einer gegebenen Altsandart eine vorgegebenes Regernationsprogramm durchlaufen lƤsst und mittels des SteuergerƤtes die Abweichung mittels eines Soll-Ist-Vergleichs, insbesondere der GrĆ¶ĆŸen wie Temperatur, Zeit und Umdrehungszahl, bestimmen und mittels einer VerƤnderung der Umdrehungszahl die Abweisung verringern lƤsst. Ferner lƤsst sich das SteuergerƤt mit sowohl mit einer an der ersten Ɩffnung ausgebildeten Absperrvorrichtung als auch mit einer an der zweiten Ɩffnung ausgebildeten Absperrvorrichtung verbinden, um eine automatische Be- und EntfĆ¼llung des BehƤlters zu ermƶglichen. Durch die Automatisierung lƤsst sich die QualitƤt des Regenerats verbessern.According to a preferred refinement, one or more temperature sensors are arranged on the container in order to determine the temperature of the sand. In another development, hole-like formations for receiving the temperature sensors are provided in the container wall. It has been found that for a rapid and reliable determination of the sand temperature during the regeneration process, it is advantageous to guide the temperature sensors through the container wall and to attach them to the inside of the container. In another development, the sensors are fastened to the container wall at different vertical positions. Studies have shown that the quality of the treated sand and the degree of regeneration depend, inter alia, on the duration of the regeneration and in particular on the continuous temperature-time profile in the regeneration, ie in the treatment. Furthermore, it is advantageous to determine the number of revolutions of the shaft, preferably by means of a frequency converter, and to change it if necessary. As a result, the temperature of the sand in the container can both lower and increase. In particular, it is advantageous to use a programmable controller in order to control the number of revolutions of the shaft by controlling the electric motor on the basis of the measured temperature of the sand and the time duration. It has been found that with a given filling quantity and a given old sand type, a predefined regernation program can be run through and the deviation determined by means of a setpoint-actual comparison, in particular the variables such as temperature, time and number of revolutions, and by means of a change in the number of revolutions reduce the rejection. Furthermore, the control unit can be connected to both at the connect first shut-off device formed as well as with a shut-off device formed on the second opening to allow automatic loading and unloading of the container. Automation can improve the quality of the regrind.

In einer anderen AusfĆ¼hrungsform bildet das zweite Lager mit dem Boden eine kraftschlĆ¼ssige Verbindung aus. Des Weiteren ist es vorteilhaft, wenn der Boden eine erste Ausformung aufweist und die erste Ausformung das zweite Lager aufnimmt, so dass das zweite Lager auƟerhalb der GehƤuseauƟenseite angeordnet ist. Hierdurch wird die Wartungsfreundlichkeit der Anlage gesteigert. Es hat sich gezeigt, dass aufgrund der hohen mechanischen KrƤfte welche die Lager ausgesetzt sind, es vorteilhaft ist, wenn das erste Lager und das zweite Lager jeweils einen Schmiernippel aufweisen, um die Lager einfach nachfetten zu kƶnnen.In another embodiment, the second bearing forms a frictional connection with the ground. Furthermore, it is advantageous if the base has a first shape and the first shape receives the second bearing, so that the second bearing is arranged outside the housing outside. This increases the ease of maintenance of the system. It has been found that due to the high mechanical forces which are exposed to the bearings, it is advantageous if the first bearing and the second bearing each have a grease nipple to simply grease the bearings can.

Um die mechanische Beanspruchung weiter zu verringen, ist es gemƤƟ einer anderen Weiterbildung vorteilhaft, die Welle parallel zu der LƤngsachse des Zylinders auszurichten. GemƤƟ einer alternativen AusfĆ¼hrungsform ist eine zweite Welle mit zweiten Reibleisten vorgesehen. Insbesondere fĆ¼r grĆ¶ĆŸere BehƤlter ist hierdurch eine gleichmƤƟige Durchmischung und Aufbereitung gewƤhrleistet. Gerade bei groƟen Durchmessern ist ein groƟer Geschwindigkeitsunterschied zwischen den tangentialen Enden an den Reibelementen und den wellennahen Bereichen an den Reibelementen gegeben. Dies stellt unter Anderem hohe Anforderungen an die Unwuchtfrelheit und die StabilitƤt der Wellen. Indem bei der AusfĆ¼hrung mit zwei oder mehreren Wellen bestimmte Bereiche in dem BehƤlter nicht von den Reibelementen Ć¼berstrichen werden, ist es insbesondere fĆ¼r eine Erhƶhung des Wirkungsgrades bei der Aufarbeitung vorteilhaft, an den Bereichen an der Innenseite des BehƤlters Umlenkleiste vorzusehen. Hierdurch wird der Sand wieder zu der BehƤltermitte umgelenkt und eine gleichbleibende QualitƤt erzielt.In order to further reduce the mechanical stress, it is advantageous according to another embodiment, to align the shaft parallel to the longitudinal axis of the cylinder. According to an alternative embodiment, a second shaft is provided with second friction strips. In particular for larger containers this ensures uniform mixing and preparation. Especially with large diameters, there is a large difference in speed between the tangential ends on the friction elements and the shaft-near regions on the friction elements. Among other things, this places high demands on the imbalance and the stability of the waves. By not being swept over by the friction elements in the embodiment with two or more waves certain areas in the container, it is particularly advantageous for increasing the efficiency in the work-up to provide at the areas on the inside of the container deflection bar. As a result, the sand is redirected to the center of the container and achieved a consistent quality.

Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnungen nƤher erlƤutert. Hierbei werden gleichartige Teile mit identischen Bezeichnungen beschriftet. Die dargestellte AusfĆ¼hrungsformen sind stark schematisiert, d.h. die AbstƤnde und laterale und vertikale Erstreckung sind nicht maƟstƤblich und weisen, sofern nicht anders angegeben auch keine ableitbare geometrische Relation zueinander auf. Darin zeigen die:

Figur 1
eine Querschnitt auf eine erfindungsgemƤƟe erste AusfĆ¼hrungsform,
Figur 2
einen Querschnitt auf eine erfindungsgemƤƟe zweite AusfĆ¼hrungsform,
Figur 3
einen Querschnitt auf eine erfindungsgemƤƟe dritte AusfĆ¼hrungsform.
The invention will be explained in more detail with reference to the drawings. Here similar parts are labeled with identical names. The illustrated embodiments are highly schematic, ie the distances and lateral and vertical extent are not to scale and, unless otherwise indicated, have no derivable geometric relation to each other. In it show:
FIG. 1
a cross section of a first embodiment according to the invention,
FIG. 2
a cross section of a second embodiment according to the invention,
FIG. 3
a cross section of a third embodiment according to the invention.

Die Abbildung der Figur 1 zeigt einen schematischen Querschnitt einer erfindungsgemƤƟen Regenerationsvorrichtung 5, ausgebildet zur Aufbereitung von GieƟerei-Altsanden, mit einem zylinderfƶrmigen BehƤlter 10 mit einem Deckel 12 und einen Boden 14, mehrere rotierend angetriebene in dem BehƤlter 10 ausgebildete an einer ersten Welle 30 angeordnete Reibelemente 40 auf. Die LƤngsachse der ersten Welle 30 ist im Wesentlichen, vorzugsweise exakt parallel zu der LƤngsachse des BehƤlters 10 ausgerichtet. An der ersten Welle 30 sind an der Oberseite der Welle 30 ein Antrieb in Form eines Elektromotors 20 und ein erstes Lager 22 angeordnet. An der Unterseite der Welle 30, welche den Boden 14 durchgreift ist ein von dem ersten Lager 22 beabstandetes zweites Lager 25 angeordnet. Das zweite Lager 25 bildet mit dem Boden 14 eine kraftschlĆ¼ssige Verbindung aus. Sowohl das erste Lager 22 als auch das zweite Lager 25 weisen jeweils einen Schmiernippel 26 auf. Die Reibelemente 40 sind zwischen dem ersten Lager 22 und dem zweiten Lager 25 innerhalb des BehƤlters 10 angeordnet. An der Oberseite weist der BehƤlter 10 einen ersten Flansch 42 und an der Unterseite einen zweiten Flansch 44 aufweist, wobei der erste Flansch 42 kraftschlĆ¼ssig mit dem Deckel 12 und der zweite Flansch 44 kraftschlĆ¼ssig mit dem Boden 14 verbunden ist.The picture of the FIG. 1 shows a schematic cross section of a regeneration device 5 according to the invention, designed for the treatment of foundry old sands, with a cylindrical container 10 with a lid 12 and a bottom 14, a plurality of rotationally driven in the container 10 formed on a first shaft 30 arranged friction elements 40. The longitudinal axis of the first shaft 30 is substantially aligned, preferably exactly parallel to the longitudinal axis of the container 10. On the first shaft 30, a drive in the form of an electric motor 20 and a first bearing 22 are arranged on the upper side of the shaft 30. On the underside of the shaft 30, which passes through the bottom 14 a spaced from the first bearing 22 second bearing 25 is arranged. The second bearing 25 forms with the bottom 14 a frictional connection. Both the first bearing 22 and the second bearing 25 each have a lubricating nipple 26. The friction elements 40 are disposed between the first bearing 22 and the second bearing 25 within the container 10. At the top, the container 10 has a first flange 42 and on the underside a second flange 44, wherein the first flange 42 frictionally with the cover 12 and the second flange 44 is frictionally connected to the bottom 14.

An der AuƟenseite weist der BehƤlter 10 zwei Aufnahmen 50 fĆ¼r Temperatursensoren auf. Die Aufnahmen 50 weisen jeweils Aussparungen in BehƤlterwand auf, so dass die Temperatursensoren die Temperatur Innerhalb des BehƤlters messen. Ferner weist der BehƤlter 10 weist eine erste Ɩffnung 60, die als ElnfĆ¼llvorrlchtung ausgebildet ist und eine zweite Ɩffnung 70, die als Auslassvorrichtung ausgebildet ist und eine dritte Ɩffnung 80, die als Abluftvorrichtung oder als Abluftƶffnung ausgebildet ist, auf. Die erste Ɩffnung 60 die zweite Ɩffnung 70 und die dritte Ɩffnung 80 weisen an der AuƟenseite des BehƤlters 10 eine stutzenfƶrmlge Ausbildung auf. Sowohl an der ersten Ɩffnung 60 als auch an der zweiten Ɩffnung 70 sind automatischen Absperrvorrichtungen 110 vorgesehen.On the outside, the container 10 has two receptacles 50 for temperature sensors. The receptacles 50 each have recesses in the container wall, so that the temperature sensors measure the temperature within the container. Furthermore, the container 10 has a first opening 60, which is designed as ElnfĆ¼llvorrlchtung and a second opening 70, which is designed as an outlet device and a third opening 80, which is designed as an exhaust device or as an exhaust port on. The first opening 60, the second opening 70 and the third opening 80 have on the outside of the container 10 a nozzle-like design. Automatic shut-off devices 110 are provided both at the first opening 60 and at the second opening 70.

Der Deckel 12 ist mittels einer ersten Schraubverbindung 82 mit dem ersten Flansch 42 und der Boden 14 mit einer zweiten Schraubverbindung 84 mit dem zweiten Flansch 14 jeweils kraftschlĆ¼ssig verbunden und jeweils leicht lƶsbar. Des Weiteren ist das erste Lager 22 an den Deckel 12 angeflanscht. Das erste Lager 22 ist mit einer HĆ¼lse abgedeckt. Die HĆ¼lse ist an der Unterseite mit einer dritten Schraubverbindung 86 mit dem Deckel 12 und an der Oberseite mittels einer vierten Schraubverbindung 88 mit dem Elektromotor verbunden. Um die Drehzahl der Welle 30 zu Ć¼berwachen ist ein Frequenzumrichter 100 vorgesehen. An der Abluftƶffnung lƤsst sich eine Absaugvorrichtung anbringen, um einen leichten Unterdruck in dem BehƤlter 10 zu erzeugen und den anfallenden Staub abzusaugen. Indem die erste Ɩffnung 60 und die zweite Ɩffnung 70 nicht luftdicht ausgefĆ¼hrt sind strƶmt durch beide Ɩffnungen 60, 70 Luft nach.The cover 12 is connected in each case by means of a first screw 82 with the first flange 42 and the bottom 14 with a second screw 84 with the second flange 14 each frictionally engaged and each easily. Furthermore, the first bearing 22 is flanged to the cover 12. The first bearing 22 is covered with a sleeve. The sleeve is connected at the bottom with a third screw 86 with the cover 12 and at the top by means of a fourth screw 88 with the electric motor. In order to monitor the rotational speed of the shaft 30, a frequency converter 100 is provided. At the exhaust port, a suction device can be attached to create a slight negative pressure in the container 10 and to suck the resulting dust. By the first opening 60 and the second opening 70 are not made airtight air flows through both openings 60, 70 air.

In der Abbildung der Figur 2 ist eine zweite AusfĆ¼hrungsform der Regenerationsvorrichtung 5 dargestellt. Nachfolgend werden nur die Unterschiede zu der AusfĆ¼hrungsform der Figur 1 erlƤutert. Aus GrĆ¼nden der Ɯbersichtlichkeit sind einige Details der AusfĆ¼hrung der Figur 1 nicht dargestellt. Der Boden 14 ist als Anstrƶmkasten ausgebildet, wobei der Anstrƶmkasten gegenĆ¼ber dem BehƤlter 10 mittels eines DĆ¼senbodens 115 abgegrenzt und die vierte Ɩffnung 125 an der Unterseite des Bodens 14 als Zuluftƶffnung oder Zuluftvorrichtung an dem Anstrƶmkasten ausgebildet ist. Ferner weist der Anstrƶmkasten eine Revisionsƶffnung 127 zum Abschmieren des zweiten Lagers 25 auf. der DĆ¼senboden 115 weist eine Vielzahl von Lƶchern auf durch die die zugefĆ¼hrte Luft hindurchstrƶmt. Hierdurch wird der Sand zusƤtzlich in der Schwebe bei der Regeneration gehalten.In the picture of the FIG. 2 a second embodiment of the regeneration device 5 is shown. Hereinafter, only the differences from the embodiment of FIG. 1 explained. For the sake of clarity, some details of the execution of the FIG. 1 not shown. The bottom 14 is formed as a Anstrƶmkasten, wherein the Anstrƶmkasten opposite the container 10 is delimited by means of a nozzle plate 115 and the fourth opening 125 is formed on the underside of the bottom 14 as Zuluftƶffnung or supply air to the inflow. Furthermore, the Anstrƶmkasten an inspection opening 127 for lubricating the second bearing 25 on. the nozzle bottom 115 has a plurality of holes through which the supplied air flows. As a result, the sand is also held in suspension during regeneration.

In der Abbildung der Figur 3 Ist eine dritte AusfĆ¼hrungsform der Regenerationsvorrichtung 5 dargestellt. Nachfolgend werden nur die Unterschiede zu der AusfĆ¼hrungsform der Figur 1 oder der Figur 2 erlƤutert. Aus GrĆ¼nden der Ɯbersichtlichkeit sind einige Details der AusfĆ¼hrung der Figur 1 oder der Figur 2 nicht dargestellt. Hierbei ist eine zweite Welle 130 mit zweiten Reibleisten 140 vorgesehen. Der Boden 14 weist nun eine erste Ausformung auf wobei die erste Ausformung die zweiten Lager 25 aufnimmt, so dass die zweiten Lager 25 auƟerhalb der GehƤuseauƟenseite angeordnet sind. Des Weiteren ist an der Innenseite des BehƤlters 10 eine Umlenkleiste vorgesehen nicht dargestellt.In the picture of the FIG. 3 If a third embodiment of the regeneration device 5 is shown. Hereinafter, only the differences from the embodiment of FIG. 1 or the FIG. 2 explained. For the sake of clarity, some details of the execution of the FIG. 1 or the FIG. 2 not shown. In this case, a second shaft 130 is provided with second friction strips 140. The bottom 14 now has a first shape, wherein the first shape receives the second bearing 25, so that the second bearing 25 are arranged outside the housing outside. Furthermore, a deflecting strip is provided on the inside of the container 10 is not shown.

Claims (14)

  1. Regeneration device (5) constructed for processing spent foundry sands, comprising:
    - a cylindrical container (10) with a lid (12) and a base (14), and
    - a first opening (60) and/or a second opening (70), and
    - a plurality of friction elements (40) constructed to be rotationally driven in the container (10), wherein the friction elements (40) are arranged at a first shaft (30), and
    - a first bearing (22) constructed at the first shaft (30),
    characterised in that
    the first shaft (30) has a second bearing (25) spaced from the first bearing (22) and the friction elements (40) are arranged between the first bearing (22) and the second bearing (25) and the container (10) has a first flange (42) at the upper side and a second flange (44) at the lower side, wherein the first flange (42) is non-positively connected with the lid (12) and the second flange (44) is non-positively connected with the base (14).
  2. Regeneration device (5) according to claim 1, characterised in that the lid (12) is connected by means of a first screw connection (82) with the first flange (42) and the base (14) is connected with the second flange (44) by a second screw connection (84).
  3. Regeneration device (5) according to claim 1 or 2, characterised in that the first opening (60) is formed as a filling device and/or as a ventilating opening and the second opening (70) is formed as an outlet device and/or as an air feed opening.
  4. Regeneration device (5) according to any one of claims 1 to 3, characterised in that a third opening (80) spaced from the first opening (60) is formed as an exhaust air device and/or a fourth exhaust air opening (125) spaced from the second opening (70) and formed as an air feed device is or are provided.
  5. Regeneration device (5) according to any one of claims 1 to 4, characterised in that the base (14) is formed as an incident flow box and wherein the incident flow box is bounded relative to the container by means of a nozzle base (115) and the fourth opening (125) is formed at the incident flow box.
  6. Regeneration device (5) according to any one of claims 1 to 4, characterised in that the fourth opening (125) is formed at a lower side of the base (14).
  7. Regeneration device (5) according to any one of claims 1 to 6, characterised in that the first opening (60) and the second opening (70) are formed at the container (10) and have a stepped construction at the outer side of the container (10).
  8. Regeneration device (5) according to any one of the preceding claims, characterised in that a temperature sensor is arranged at the container (10).
  9. Regeneration device (5) according to any one of the preceding claims, characterised in that the second bearing (25) forms a non-positive connection with the base (14).
  10. Regeneration device (5) according to any one of the preceding claims, characterised in that the base (14) has a first formation and the first formation receives the second bearing (25) so that the second bearing (25) is arranged outside the housing outer side.
  11. Regeneration device (5) according to any one of the preceding claims, characterised in that the shaft (30) is oriented parallelly to the longitudinal axis of the cylinder.
  12. Regeneration device (5) according to any one of the preceding claims, characterised in that a second shaft (130) is provided with second friction strips (140).
  13. Regeneration device (5) according to claim 12, characterised in that a deflecting strip is provided at the inner side of the container (10).
  14. Regeneration device (5) according to any one of the preceding claims, characterised in that the bearings (22, 25) have a lubricant nipple (26).
EP12004128.0A 2012-05-25 2012-05-25 Regeneration device Active EP2666562B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP12004128.0A EP2666562B1 (en) 2012-05-25 2012-05-25 Regeneration device
PL12004128T PL2666562T3 (en) 2012-05-25 2012-05-25 Regeneration device
KR1020147036408A KR101645116B1 (en) 2012-05-25 2013-05-08 Regeneration device
PCT/EP2013/001367 WO2013174479A1 (en) 2012-05-25 2013-05-08 Regeneration device
CN201380027496.5A CN104379274B (en) 2012-05-25 2013-05-08 Regenerating unit
JP2015513037A JP2015517409A (en) 2012-05-25 2013-05-08 Playback device
US14/552,675 US20150083837A1 (en) 2012-05-25 2014-11-25 Regeneration device

Applications Claiming Priority (1)

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EP12004128.0A EP2666562B1 (en) 2012-05-25 2012-05-25 Regeneration device

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EP2666562A1 EP2666562A1 (en) 2013-11-27
EP2666562B1 true EP2666562B1 (en) 2014-07-23

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US (1) US20150083837A1 (en)
EP (1) EP2666562B1 (en)
JP (1) JP2015517409A (en)
KR (1) KR101645116B1 (en)
CN (1) CN104379274B (en)
PL (1) PL2666562T3 (en)
WO (1) WO2013174479A1 (en)

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EP2666562A1 (en) 2013-11-27
CN104379274A (en) 2015-02-25
US20150083837A1 (en) 2015-03-26
JP2015517409A (en) 2015-06-22
KR20150018838A (en) 2015-02-24
KR101645116B1 (en) 2016-08-12
CN104379274B (en) 2017-03-01
PL2666562T3 (en) 2014-12-31
WO2013174479A1 (en) 2013-11-28

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