EP1454679B1 - Screening device - Google Patents
Screening device Download PDFInfo
- Publication number
- EP1454679B1 EP1454679B1 EP04450042A EP04450042A EP1454679B1 EP 1454679 B1 EP1454679 B1 EP 1454679B1 EP 04450042 A EP04450042 A EP 04450042A EP 04450042 A EP04450042 A EP 04450042A EP 1454679 B1 EP1454679 B1 EP 1454679B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vibrating body
- screening apparatus
- eccentric
- elastic
- crossmembers
- 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.)
- Expired - Lifetime
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- 238000012216 screening Methods 0.000 title claims description 64
- 230000008878 coupling Effects 0.000 claims description 85
- 238000010168 coupling process Methods 0.000 claims description 85
- 238000005859 coupling reaction Methods 0.000 claims description 85
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007873 sieving Methods 0.000 description 4
- 239000013590 bulk material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/48—Stretching devices for screens
- B07B1/485—Devices for alternately stretching and sagging screening surfaces
Definitions
- the invention relates to a screening device with a first oscillating body, which is provided with first cross members, and a second oscillating body, which is provided with second cross members, which first and second cross members are arranged alternately and have clamping devices, so that elastic Siebbeläge between each first and ever a second cross member can be clamped, and a drive unit which is directly coupled to the first oscillating body and over which the first oscillating body is forcibly guided, so that the clamped elastic Siebbeläge between a stretched and a compressed position are reciprocated.
- Such a sieve device such as in the AT 379 088 B is shown prevented by the generation of vibrations in the Siebbelägen an otherwise with time taking place the sieve holes through the material to be screened.
- the Siebbeläge juxtaposed to a Siebbahn periodically change between the stretched and the compressed layer back and forth and thereby cause an extraordinary high acceleration of the screenings in the vertical direction, which ensures that the Siebbeläge constantly kept free of deposits even at high moisture content and long sieve duration become.
- a first oscillating body forming support structure is excited with first cross members by a drive unit to circular movements, wherein the support structure is connected to a mass portion, which forms the second vibrating body and is provided with second cross members, via a spring element.
- the second vibrator is positively urged against the first vibrator by means of an eccentric shaft, and the first vibrator and the second vibrator are interconnected by at least one elastic coupling which elastically elastically couples the first and second vibrators substantially along a coupling axis vibration coupling.
- Such screening devices are from the DE 1 206 372 B and the EP 0 208 221 A2 known.
- each driving torque exerted on the first oscillating body always acts with respect to the second oscillating body, and therefore the amplitude of the movement remains substantially constant regardless of the load.
- the object of the invention is therefore to provide a screening device of the aforementioned type, with which also elastic couplings between two oscillating bodies are possible, whose relative movements go beyond a linear movement. According to the invention, this is achieved in that the at least one elastic coupling element elastically couples the first and the second oscillating body along at least one further coupling axis.
- a simple design of the inventive coupling element can be achieved if the further coupling axis is oriented normal to the coupling axis.
- a possible embodiment of the inventive coupling element may now consist in that the at least one elastic coupling element comprises a leaf spring and two shear elastic elements, wherein the two shear elastic elements at one end of the leaf spring and on opposite sides thereof with this and with one of the outer cheeks of the first oscillating body are connected and the other end of the leaf spring is connected to one of the inner cheeks of the second oscillating body or vice versa. Movements normal to the leaf spring axis are compensated by this during movements along the leaf spring axis of the leaf spring end mounted shear elastic elements compensate.
- the at least one elastic coupling element comprises an annular, elastic element which is surrounded on its outer circumference by a ring outer diameter adapted, hollow cylindrical holder and engages in its inner circumference adapted to the ring inner diameter cylindrical Konsolelement wherein the hollow cylindrical holder is connected to one of the outer cheeks of the first oscillating body and the cylindrical Konsolelement with one of the inner cheeks of the second oscillating body or vice versa.
- the annular elastic element may be formed as a cylindrical ring whose thickness between the ring inner diameter and the ring outer diameter has a constriction, wherein the ratio of outer ring diameter to inner ring diameter greater than 2.5 is. With the help of the constriction, the spring stiffness can be influenced.
- the at least one elastic coupling element may comprise an outer console element and a coaxially arranged inner console element projecting therein, wherein tension and compression springs are arranged parallel to the coupling axis and parallel to the normal further coupling axis of the elastic coupling element between opposing surfaces of the inner coupling element. and outer console element.
- a further embodiment of the invention may consist in that the at least one elastic coupling element comprises a bracket angle and an intermediate frame enclosing this, wherein shear elastic elements along the coupling axis of the elastic coupling element between opposing surfaces of the bracket angle and the intermediate frame are arranged, and further shear elastic Elements along the further coupling axis of the elastic coupling element between opposing surfaces of the intermediate frame and positioned outside the intermediate frame support brackets are arranged, and that the bracket angle with one of the inner cheeks of the second oscillating body and the support brackets are connected to one of the outer cheeks of the first oscillating body.
- Console angle, intermediate frame and support bracket allow the clamping of the push-elastic elements effectively along the two coupling axis.
- the use of shear elastic elements results in a very robust and reliable coupling between the two oscillating bodies.
- a technically simple to implement form of the drive unit can be formed in a further development of the invention by a rotary drive unit, preferably by a motor.
- the drive shaft of the motor is connected to an eccentric shaft, and that the eccentric shaft comprises at least one eccentric crank comprehensive single eccentric, and that the eccentric crank is coupled to the first oscillating body and the Eccentric shaft is guided in the second oscillating body.
- a single eccentric can be made relatively narrow, whereby the overall width of the device according to the invention can be kept small.
- a stock exchange can be carried out in a simple manner, but the bearing diameter is relatively large and requires correspondingly large recesses.
- An alternative embodiment of the invention may be that, furthermore, the second oscillating body is directly coupled to the drive unit or another drive unit and positively guided by it.
- the positive guidance of the two oscillating bodies required for the sieving process can be produced according to a further embodiment of the invention in that the drive shaft of the motor is connected to an eccentric shaft, which is directly coupled to both the first and the second oscillating body.
- both oscillating bodies can be driven via a common drive shaft, so that the provision of a further drive unit is not necessary.
- the eccentric shaft may comprise at least one of a first and a second eccentric crank composite double eccentric, wherein the first eccentric crank with the first oscillating body and the second eccentric crank is coupled to the second oscillating body.
- the double eccentric With the help of the double eccentric, the circular movements of the two oscillating bodies are offset from one another such that the cross members connected to them cause the screening of the screen coverings in a suitable manner.
- the use of a double eccentric brings compared to a single eccentric smaller diameter dimensions, bearing replacement is more complex. Single eccentric and double eccentric but cause the same relative movement between the two oscillating bodies.
- the eccentricity e of the at least one single eccentric or double eccentric can be adjusted in a predetermined range.
- first and the second eccentric crank of the double eccentric are offset by 180 ° relative to the eccentric shaft, the relative movement between the two oscillating bodies can be maximized. However, if necessary, another value of the offset between the eccentric cranks may be selected.
- a further variant of the invention can consist in that the second oscillating body is arranged within the first oscillating body.
- the first oscillating body is formed by two parallel outer cheeks, which are interconnected by the first cross member
- the second oscillating body is formed by two arranged inside the parallel outer cheeks, parallel inner cheeks, which through the second Cross members are interconnected and which in turn are arranged parallel to the two outer cheeks.
- the upper edges of the two inner cheeks in each case angled, and rest the second cross member on the angled upper edges.
- a development of the invention may consist in that the eccentric shaft is normal to the two outer cheeks and the two inner cheeks through this extends through and has two double eccentric, wherein the first cranks of the double eccentric are received in first bearings of the outer cheeks and the second cranks of the double eccentric in second bearings of the inner cheeks.
- the introduction of the drive torque takes place approximately in the center of gravity of the inventive device, the eccentric shaft with the two double eccentrics approximately in the longitudinal center and at half the height of the screening device transverse to the longitudinal extent of the same.
- a structurally simple and yet effective bearing of the first oscillating body can be achieved in that the two outer cheeks of the first oscillating body are supported by support spring elements against the ground.
- each screening device is subjected to a heavy load by the material to be screened in from above, which results in a very great wear of the screen lining, which leads to a deterioration of the screen quality.
- an at least partially unperforated, preferably concavely curved feed surface can be provided in the feed area, against which the screen coverings clamped in the alternately arranged cross members of the first and second oscillating bodies are directly adjacent.
- the first oscillating body in the task area have at least two task cross member between which one or more coverings, preferably unperforated Siebbelägen can be clamped, which the task area form.
- the dispensing area is also subject to increased mechanical stress, which is why it is advantageous if, in the dispensing area, a substantially horizontal support surface is formed on which a screen covering is clamped on one side in one of the transverse beams of the first vibrating body.
- the in the 3, 4 and 5 The screening device shown has a first oscillating body 1 with first transverse beams 8 and a second oscillating body 2 with second transverse beams 9 which, during operation, set a screen web formed from a plurality of screen linings 21 into oscillation.
- each two Siebbeläge 21 are mounted with their ends equipped for this purpose and fixed by driving a wedge strip 22 each form-fitting.
- a drive unit which is formed by a rotary drive unit, preferably a motor 3, is coupled directly to the first oscillating body 1.
- a drive form of this kind is in fig.20 shown as a detail, the remaining part of the device corresponds to that of 3, 4 and 5 ,
- the drive shaft 13 of the motor 3 is connected to an eccentric shaft 6, which has at least one simple eccentric comprising an eccentric crank 33, which is coupled to the first oscillating body 1 via a bearing 35.
- the eccentric shaft 6, however, is guided in a bearing 36 of the second oscillating body 2, so that the torque acting on the first oscillating body 1 is exerted correspondingly with respect to the second oscillating body 2.
- Figure 21 shows the reversal of the in fig.20 shown drive principle, which also falls under the Schutzunmfang the invention, wherein the eccentric crank 33 is coupled via the bearing 36 with the second oscillating body 2 and the eccentric shaft 6 is guided in the bearing 35 of the first oscillating body 1.
- a double eccentric is used, wherein the second vibrating body 2 with the drive unit, the motor 3 is directly coupled and forcibly guided over this.
- the second oscillating body 2 can be forcibly guided via another drive unit, a movement of the two Oscillating body 1, 2 via a common drive unit 3 is less expensive and results in a better vibration behavior of the screening device.
- the preferred operating frequency of the screening device according to the invention is achieved at a speed of rotation of the motor 3 in the range of 400 to 1000 U / min.
- the drive shaft 13 of the motor 3 is in 3 and 4 connected to the eccentric shaft 6, which is directly coupled to both the first 1 and the second vibrating body 2.
- the arrangement of the second oscillating body 2 within the first oscillating body 1 no additional openings for the cross member bushings are required and it is therefore a dustproof and waterproof design of the screening device according to the invention possible.
- the first oscillating body 1 by two parallel outer cheeks 11, which are interconnected by the first cross member 8, and the second oscillating body 2 by two arranged within the parallel outer cheeks 11, parallel inner cheeks 12, which are interconnected by the second cross member 9 and which in turn are arranged parallel to the two outer cheeks 11.
- the first 1 and the second oscillating body 2 can be parallel Perform rotational movements, so that a suitable stretching and compression movement of the individually clamped Siebbeläge 21, which may be made of plastic, rubber or a similar material, can be caused, whereby highest accelerations of the Siebbelägen 21 can be transferred to the screenings.
- a peculiarity of the construction of the 3, 4 and 5 shown device is given by the attachment of the first and second cross member 8, 9. While the first cross member 8 are connected with their front side blunt on the inside of the outer cheeks 11 with these, the second cross member 9 are on the angled upper edges of the two inner cheeks 12 and are connected by transverse plates with the inside of the inner cheeks 12. As a result, the structure of the inner cheeks 12 is simplified insofar as no recesses for the movement stroke of the first cross member 8 must be provided in these.
- the eccentric shaft 6 extends normal to the two outer cheeks 11 and the two inner cheeks 12 therethrough and has two double eccentric 4, 5 with first cranks 30 and second cranks 31, which with the first and the second oscillating body. 1 , 2 are coupled. Any other mechanically equivalent arrangement may be chosen which serves the same purpose.
- the first cranks 30 of the double eccentrics 4, 5 are received in first bearings 35 of the outer cheeks 11 and the second cranks 31 of the double eccentrics 4, 5 in second bearings 36 of the inner cheeks 12.
- the double eccentrics 4, 5 connected to both oscillating bodies 1, 5 introduce a circular, positively driven movement into each of them.
- the first 30 and the second eccentric crank 31 are offset relative to the eccentric shaft 6 by 180 °.
- These Displacement causes in the operating state of the screening device according to the invention an increased relative movement or amplitude of the oscillating body 1, 2.
- Per revolution of the eccentric shaft 6, there is ever once for upsetting and stretching the Siebbeläge 21st This process causes the so-called trampoline effect, by which acceleration values up to 55g are transferred to the screenings. Measured variables for the screening performance and the screening quality can be derived from the accelerations achieved.
- the eccentricity e ( Figure 4 ) of the double eccentric 4, 5 is adjustable in a predetermined range by the double eccentric 4, 5 are attachable as interchangeable sockets on the eccentric shaft 6.
- the operating point of the device according to the invention can be adjusted as needed.
- the right choice of the frequency and the vibration amplitude of the screen vibration is decisive for the quality of the screening result.
- the eccentricity e1 can be varied, the use of the single eccentric results in a narrower design, but requires a larger bearing diameter than a double eccentric.
- eccentric shaft 6 for driving the first and second oscillating bodies 1, 2, but it has been found that an eccentric shaft 6 extending approximately through the center of gravity causes no or only a few disturbing oscillation resonances.
- the eccentric shaft 6 therefore preferably extends with the two double eccentrics 4, 5 approximately in the longitudinal center and on half height of the screening device transverse to the longitudinal extent of the same.
- the two outer cheeks 11 of the first oscillating body 1 are supported by support spring elements 20 with respect to the ground, which receive the oscillatory movement of the first oscillating body 1.
- an at least partially uncalculated, preferably concavely curved feed surface 39 is provided, to which the in the alternately arranged cross member 8, 9 of the first 1 and second oscillating body 2 clamped screen coverings 21 directly adjacent, as from Figure 6 evident. Due to the concave shape of the feed surface 39, the material to be screened from above (arrow 16) is moved in the direction of the screen coverings 21. In order to avoid laying or ingrowth of sieve holes in this highly stressed part of the device, the application surface 39 is executed without being perforated.
- the first oscillating body 1 has for this purpose in the task area 17 at least two task cross member 15 ( Fig.6, 7 ), between which one or more coverings, preferably unperforated screen coverings 22 can be clamped, which form the task surface 39.
- the delivery area 18 in which a substantially horizontal support surface 26 is formed, on which a one-sided in one of the cross member 8 of the first oscillating body 1 clamped screen covering 27 extends, over which the remaining in the screening process oversize in the direction of arrow 28th is transported away.
- Fig.1 and 2 show an embodiment in which the entire screening device according to the invention is held by support bracket 38 in an inclined position to promote the movement of the screenings from the feeding area 17 through the screening device in the direction of the discharge area 18.
- the motor 3 is positioned on a support frame 39 in an elevated position relative to the ground.
- the realization of a defined movement sequence of the second oscillating body 2, which is anchored only via the shaft bearing, is achieved by a coupling of the first and second oscillating bodies 1, 2 via one or more elastic coupling elements 70, 71, 72, 73, as in FIGS Fig.12 to 19 exemplified, guaranteed.
- the spring constant of the coupling elements is defined.
- the coupling of the second oscillating body 2 to the first oscillating body 1 by the elastic coupling element 70, 71, 72, 73 causes the forces resulting from the oscillating body movements to be recorded, stored and in turn delivered to the oscillating bodies 1, 2, which minimizes the driving forces is being used.
- the first and the second vibrating body 1, 2 by the elastic coupling element 70, 71, 72, 73, as shown in the Fig.12 to 19 is coupled along a coupling axis 107 and along at least one further coupling axis 108 elastically coupled.
- the elastic coupling element 70 has a leaf spring 80, which is arranged with its main sides normal to one of the inner cheeks 12 of the second oscillating body 2 and one of the outer cheeks 11 of the first oscillating body 1 and two shear elastic elements 82, for example Schubgummiblöcke, wherein the two shear elastic elements 82 are connected at one end of the leaf spring 80 and on opposite sides thereof with this and with the one outer cheek 11.
- two shear elastic elements 82 are connected at one end of the leaf spring 80 and on opposite sides thereof with this and with the one outer cheek 11.
- bolted to the outer cheek 11 angles 81 are bolted to the push-elastic elements 82 and the intermediate leaf spring end.
- the other end of the leaf spring 80 is connected via a bracket 83 with an inner cheek 12, preferably screwed.
- the other end of the leaf spring 80 with the one outer cheek 11 and the one end of the leaf spring 80 may be connected together with the two shear elastic elements 82 with the one inner cheek 12.
- the elastic coupling element 71 comprises an annular, elastic element 90, which is surrounded on its outer periphery by a hollow cylindrical holder 91, 94 adapted to the ring outer diameter. In its inner circumference engages a matched to the ring inner diameter cylindrical bracket member 92, wherein the hollow cylindrical bracket 91, 94 with one of the outer cheeks 11 of the first oscillating body 1 and the cylindrical bracket member 92 with one of the inner cheeks 12 of the second oscillating body 2 or vice versa, in particular screwed is.
- the annular, elastic element 90 is formed as a cylindrical ring whose thickness between the ring inner diameter d and the outer ring diameter D has a constriction, wherein the ratio of outer ring diameter D to inner ring diameter d is greater than 2.5.
- this can be vulcanized outwardly and inwardly onto an outer 98 and inner metal ring 99, for example, so that a non-detachable connection results, wherein the inner metal ring 99, for example, by a light press fit is firmly connected to the cylindrical bracket member 92.
- the outer metal ring 99 is so pressed with the annular elastic member 90 in the hollow cylindrical holder 91, 94, that the outer metal ring 99 is fixedly connected thereto and in the annular elastic member 90 a along its outer circumference radially inwardly directed Adjusting bias, which ensures that the annular elastic element 90 is set in the plane of motion by the relative movement of the two oscillating bodies 1, 2 in any direction under a tensile stress.
- the movement stroke can be eg 5 to 20mm.
- the oscillating body 1 with the annular member 90 and this with the vibrating body 2 is firmly connected, so that the annular member 90 while operating the device according to the invention absorbs and releases energy by the relative movements, but does not perform any rotational movement relative to the vibrating body 1 and 2.
- a plurality of openings 97 for influencing its spring stiffness are formed in the annular, elastic element 90 in the thickness direction.
- the elastic coupling element 72 comprises a box-shaped mecanickonsolelement 101 and projecting into this, coaxially arranged tubular mecanickonsolelement 102, wherein parallel to the coupling axis 107 and parallel to the normal further coupling axis 108 of the elastic coupling element 72 compression and compression springs 103, 104 are disposed between opposite surfaces of the inner 102 and mecanickonsolelements 101.
- the tension and compression springs 103, 104 thus run perpendicular to one another, so that both components of the movement in the vertical and in the horizontal direction are formed as elastic deformations in the direction of the normal axes 107, 108 corresponding to the respective elastic constants of the tension and compression springs 103, 104 ,
- the embodiment according to the Fig.18, 19 oriented to elastic shear deformation of the elastic coupling element 73, which comprises a bracket angle 113 and an intermediate frame 112 enclosing this wherein along the coupling axis 107 of the elastic coupling member 73 between opposing surfaces of the bracket 113 and the intermediate frame 112, shear elastic elements 114 are arranged, and along the further coupling axis 108 of the elastic coupling member 73 between opposing surfaces of the intermediate frame 112 and outside of the intermediate frame 112nd Positioned support brackets 110 more shear elastic elements 111 are arranged.
- the bracket angle 113 is connected to one of the inner cheeks 12 of the second oscillating body 2, in particular screwed and it are the support bracket 110 connected to one of the outer cheeks 11 of the first oscillating body 1, in particular screwed.
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- Combined Means For Separation Of Solids (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Description
Die Erfindung betrifft eine Siebvorrichtung mit einem ersten Schwingkörper, welcher mit ersten Querträgern versehen ist, und einem zweiten Schwingkörper, welcher mit zweiten Querträgern versehen ist, welche erste und zweite Querträger alternierend angeordnet sind und Einspannvorrichtungen aufweisen, sodaß elastische Siebbeläge zwischen je einem ersten und je einem zweiten Querträger einspannbar sind, und einer Antriebseinheit, welche mit dem ersten Schwingkörper direkt gekoppelt ist und über welche der erste Schwingungskörper zwangsgeführt ist, sodaß die eingespannten elastischen Siebbeläge zwischen einer gestreckten und einer gestauchten Lage hin- und herbewegt werden.The invention relates to a screening device with a first oscillating body, which is provided with first cross members, and a second oscillating body, which is provided with second cross members, which first and second cross members are arranged alternately and have clamping devices, so that elastic Siebbeläge between each first and ever a second cross member can be clamped, and a drive unit which is directly coupled to the first oscillating body and over which the first oscillating body is forcibly guided, so that the clamped elastic Siebbeläge between a stretched and a compressed position are reciprocated.
Eine solche Siebvorrichtung, wie sie etwa in der
Weiters ist bei der erfindungsgemäßen Siebvorrichtung der zweite Schwingkörper gegenüber dem ersten Schwingkörper mittels einer Exzenterwelle zwangsgeführt und es sind der erste Schwingkörper und der zweite Schwingkörper durch zumindest ein elastisches Kopplungselement miteinander verbunden, das den ersten und den zweiten Schwingkörper im wesentlichen entlang einer Kopplungs-Achse elastisch schwingungskoppelt.Further, in the strainer of the present invention, the second vibrator is positively urged against the first vibrator by means of an eccentric shaft, and the first vibrator and the second vibrator are interconnected by at least one elastic coupling which elastically elastically couples the first and second vibrators substantially along a coupling axis vibration coupling.
Derartige Siebvorrichtungen sind aus der
Dadurch, dass der zweite Schwingkörper gegenüber dem ersten Schwingkörper zwangsgeführt ist, bleibt die Amplitude der Siebschwingung weitgehend unabhängig von der Höhe der Siebbeladung, und ermöglicht ein von äusseren Einwirkungen unbeeinflusstes Siebergebnis und ein wirkungsvolles Sieben, insbesondere von siebschwierigem Siebgut bei einfachem und kompaktem Aufbau der Siebvorrichtung.The fact that the second oscillating body is forcibly guided relative to the first oscillating body, the amplitude of the Siebschwingung remains largely independent of the height of the Siebbeladung, and allows an unaffected by external effects Siebergebnis and effective sieving, in particular Siebschwierigem Siebgut with a simple and compact design of the screening device ,
Es wirkt daher jedes Antriebsdrehmoment, welches auf den ersten Schwingkörper ausgeübt wird, immer in Bezug auf den zweiten Schwingkörper, weswegen die Bewegungsamplitude unabhängig von der Beladung im wesentlichen konstant bleibt.Therefore, each driving torque exerted on the first oscillating body always acts with respect to the second oscillating body, and therefore the amplitude of the movement remains substantially constant regardless of the load.
Bei herkömmlichen Siebvorrichtungen erfolgt eine Kopplung des ersten und des zweiten Schwingkörpers durch ein elastisches Kopplungselement, um die Bewegung des ersten Schwingkörpers zum phasenverschobenen Antrieb des zweiten Schwingkörpers zu verwenden. Die dabei verwendeten schubelastischen Kopplungselemente sind aber nur für eine Schwingungsbelastung in einer Richtung ausgelegt, und sind daher für die Aufnahme von Bewegungen, die auch ausserhalb dieser Kopplungs-Achse verlaufen, wie dies bei kreisförmigen Bewegungen der Fall ist, nicht geeignet. Derartige bekannte Kopplungselemente halten einer solchen Belastung nicht stand.In conventional screening devices, a coupling of the first and the second oscillating body by an elastic coupling element takes place in order to use the movement of the first oscillating body for the phase-shifted drive of the second oscillating body. However, the shear elastic coupling elements used are designed only for a vibration load in one direction, and therefore are not suitable for the absorption of movements that extend outside this coupling axis, as is the case with circular movements. Such known coupling elements do not withstand such a burden.
Aufgabe der Erfindung ist daher, eine Siebvorrichtung der vorstehend genannten Art anzugeben, mit der auch elastische Kopplungen zwischen zwei Schwingkörpern möglich sind, deren Relativbewegungen über eine lineare Bewegung hinausgehen. Erfindungsgemäss wird dies dadurch erreicht, dass das zumindest eine elastische Kopplungselement den ersten und den zweiten Schwingkörper entlang zumindest einer weiteren Kopplungs-Achse elastisch schwingungskoppelt.The object of the invention is therefore to provide a screening device of the aforementioned type, with which also elastic couplings between two oscillating bodies are possible, whose relative movements go beyond a linear movement. According to the invention, this is achieved in that the at least one elastic coupling element elastically couples the first and the second oscillating body along at least one further coupling axis.
Auf diese Weise können alle Bewegungen in der durch die beiden Kopplungs-Achsen aufgespannten Ebene vom elastischen Kopplungselement aufgenommen, gespeichert und wiederum abgegeben werden, was insbesondere für eine kreisförmige Relativbewegung von Vorteil ist. Durch Kopplung der beiden Schwingkörper miteinander über ein erfindungsgemässes zumindest zweiachsiges, elastisches Kopplungselement können die kreisförmigen Relativbewegungen zwischen den Schwingkörpern in geeigneter Weise aufeinander abgestimmt werden.In this way, all movements in the plane spanned by the two coupling axes plane can be picked up by the elastic coupling element, stored and delivered again, which is particularly advantageous for a circular relative movement. By coupling the two vibrating bodies together via an inventive at least biaxial, elastic coupling element, the circular relative movements between the vibrating bodies can be suitably coordinated with one another.
Eine einfache Bauform des erfindungsgemässen Kopplungselements kann erzielt werden, wenn die weitere Kopplungs-Achse normal zur Kopplungs-Achse orientiert ist.A simple design of the inventive coupling element can be achieved if the further coupling axis is oriented normal to the coupling axis.
Eine mögliche Ausführungsform des erfindungsgemässen Kopplungselements kann nun darin bestehen, dass das zumindest eine elastische Kopplungselement eine Blattfeder und zwei schubelastische Elemente umfasst, wobei die zwei schubelastischen Elemente an einem Ende der Blattfeder und an gegenüberliegenden Seiten derselben mit dieser und mit einer der Aussenwangen des ersten Schwingkörpers verbunden sind und das andere Ende der Blattfeder mit einer der Innenwangen des zweiten Schwingkörpers verbunden ist oder umgekehrt. Bewegungen normal zur Blattfederachse werden von dieser ausgeglichen während Bewegungen entlang der Blattfederachse von den am Blattfederende angebrachten schubelastischen Elementen einen Ausgleich erfahren.A possible embodiment of the inventive coupling element may now consist in that the at least one elastic coupling element comprises a leaf spring and two shear elastic elements, wherein the two shear elastic elements at one end of the leaf spring and on opposite sides thereof with this and with one of the outer cheeks of the first oscillating body are connected and the other end of the leaf spring is connected to one of the inner cheeks of the second oscillating body or vice versa. Movements normal to the leaf spring axis are compensated by this during movements along the leaf spring axis of the leaf spring end mounted shear elastic elements compensate.
Eine sehr günstige Bewegungskopplung für kreisförmige Relativbewegungen lässt sich erreichen, wenn das zumindest eine elastische Kopplungselement ein ringförmiges, elastisches Element umfasst, das an seinem Aussenumfang von einer dem Ringaussendurchmesser angepassten, hohlzylindrischen Halterung umgeben ist und in seinen Innenumfang ein an den Ringinnendurchmesser angepasstes zylindrisches Konsolelement eingreift, wobei die hohlzylindrische Halterung mit einer der Aussenwangen des ersten Schwingkörpers und das zylindrische Konsolelement mit einer der Innenwangen des zweiten Schwingkörpers oder umgekehrt verbunden ist. Um die Kopplung der beiden Schwingkörper bei grösstmöglicher Lebensdauer des elastischen Elements zu verbessern, kann das ringförmige, elastische Element als Zylinderring ausgebildet sein, dessen Dicke zwischen dem Ringinnendurchmesser und dem Ringaussendurchmesser eine Einschnürung aufweist, wobei das Verhältnis von Ringaussendurchmesser zu Ringinnendurchmesser grösser als 2,5 beträgt. Mit Hilfe der Einschnürung kann die Federsteifigkeit beeinflusst werden.A very favorable motion coupling for circular relative movements can be achieved if the at least one elastic coupling element comprises an annular, elastic element which is surrounded on its outer circumference by a ring outer diameter adapted, hollow cylindrical holder and engages in its inner circumference adapted to the ring inner diameter cylindrical Konsolelement wherein the hollow cylindrical holder is connected to one of the outer cheeks of the first oscillating body and the cylindrical Konsolelement with one of the inner cheeks of the second oscillating body or vice versa. In order to improve the coupling of the two vibrating body with the greatest possible life of the elastic member, the annular elastic element may be formed as a cylindrical ring whose thickness between the ring inner diameter and the ring outer diameter has a constriction, wherein the ratio of outer ring diameter to inner ring diameter greater than 2.5 is. With the help of the constriction, the spring stiffness can be influenced.
In weiterer Ausbildung kann das zumindest eine elastische Kopplungselement ein Aussenkonsolelement und ein in dieses ragendes, koaxial angeordnetes Innenkonsolelement umfassen, wobei parallel zu der Kopplungs-Achse und parallel zu der dazu normalen weiteren Kopplungs-Achse des elastischen Kopplungselements Zugund Druckfedern zwischen gegenüberliegenden Flächen des Innen- und Aussenkonsolelements angeordnet sind. Die Verwendung von nur zwei Konsolelementen und den zwischen diesen eingespannten Federn ermöglicht eine technisch einfache und kostengünstige Realisierung.In a further embodiment, the at least one elastic coupling element may comprise an outer console element and a coaxially arranged inner console element projecting therein, wherein tension and compression springs are arranged parallel to the coupling axis and parallel to the normal further coupling axis of the elastic coupling element between opposing surfaces of the inner coupling element. and outer console element. The use of only two console elements and the springs clamped between them allows a technically simple and cost-effective implementation.
Schliesslich kann eine weitere Ausgestaltung der Erfindung darin bestehen, dass das zumindest eine elastische Kopplungselement einen Konsolwinkel und einen diesen umschliessenden Zwischenrahmen umfasst, wobei schubelastische Elemente entlang der Kopplungs-Achse des elastischen Kopplungselements zwischen gegenüberliegenden Flächen des Konsolwinkels und des Zwischenrahmens angeordnet sind, und weitere schubelastische Elemente entlang der weiteren Kopplungs-Achse des elastischen Kopplungselements zwischen gegenüberliegenden Flächen des Zwischenrahmens und ausserhalb des Zwischenrahmens positionierten Stützwinkeln angeordnet sind, und dass der Konsolwinkel mit einer der Innenwangen des zweiten Schwingkörpers und die Stützwinkel mit einer der Aussenwangen des ersten Schwingkörpers verbunden sind.Finally, a further embodiment of the invention may consist in that the at least one elastic coupling element comprises a bracket angle and an intermediate frame enclosing this, wherein shear elastic elements along the coupling axis of the elastic coupling element between opposing surfaces of the bracket angle and the intermediate frame are arranged, and further shear elastic Elements along the further coupling axis of the elastic coupling element between opposing surfaces of the intermediate frame and positioned outside the intermediate frame support brackets are arranged, and that the bracket angle with one of the inner cheeks of the second oscillating body and the support brackets are connected to one of the outer cheeks of the first oscillating body.
Konsolwinkel, Zwischenrahmen und Stützwinkel ermöglichen die Einspannung der schubelastischen Elemente auf wirkungsvolle Weise entlang der beiden Kopplungs-Achse. Die Verwendung von schubelastischen Elementen ergibt eine sehr robuste und zuverlässige Kopplung zwischen den beiden Schwingkörpern.Console angle, intermediate frame and support bracket allow the clamping of the push-elastic elements effectively along the two coupling axis. The use of shear elastic elements results in a very robust and reliable coupling between the two oscillating bodies.
Eine technisch einfach zu verwirklichende Form der Antriebseinheit kann in Weiterbildung der Erfindung durch eine Rotations-Antriebseinheit, vorzugsweise durch einen Motor gebildet sein.A technically simple to implement form of the drive unit can be formed in a further development of the invention by a rotary drive unit, preferably by a motor.
Dabei kann vorgesehen sein, dass die Antriebswelle des Motors mit einer Exzenter-Welle verbunden ist, und dass die Exzenter-Welle zumindest einen eine Exzenter-Kurbel umfassenden Einfach-Exzenter aufweist, und dass die Exzenter-Kurbel mit dem ersten Schwingkörper gekoppelt ist und die Exzenter-Welle im zweiten Schwingkörper geführt ist. Ein Einfach-Exzenter kann relativ schmal aufgebaut werden, wodurch die Gesamtbreite der erfindungsgemässen Vorrichtung klein gehalten werden kann. Ein Lagertausch kann auf einfache Weise durchgeführt werden, dafür ist der Lagerdurchmesser relativ gross und erfordert entsprechend grosse Ausnehmungen.It can be provided that the drive shaft of the motor is connected to an eccentric shaft, and that the eccentric shaft comprises at least one eccentric crank comprehensive single eccentric, and that the eccentric crank is coupled to the first oscillating body and the Eccentric shaft is guided in the second oscillating body. A single eccentric can be made relatively narrow, whereby the overall width of the device according to the invention can be kept small. A stock exchange can be carried out in a simple manner, but the bearing diameter is relatively large and requires correspondingly large recesses.
Eine alternative Ausführungsform der Erfindung kann darin bestehen, dass weiters der zweite Schwingkörper mit der Antriebseinheit oder einer anderen Antriebseinheit direkt gekoppelt und über diese zwangsgeführt ist.An alternative embodiment of the invention may be that, furthermore, the second oscillating body is directly coupled to the drive unit or another drive unit and positively guided by it.
Es wird somit in beide Schwingkörper Bewegungsgrösse und Bewegungsrichtung eingeleitet, wodurch sowohl der erste als auch der zweite Schwingungskörper zueinander zwangsgeführt sind und die Siebschwingungsamplitude damit auch bei ansteigender Beladung der Siebbeläge annähernd konstant bleibt. Eine Veränderung der Siebqualität ist daher auch bei wechselnden äusseren Verhältnissen und Einflüssen nicht festzustellen.It is thus introduced in both oscillating body movement size and direction of movement, whereby both the first and the second vibrating body are constrained to each other and the Siebschwingungsamplitude thus remains approximately constant even with increasing loading of Siebbeläge. A change in the quality of the sieve can therefore not be determined even with changing external conditions and influences.
Die für den Siebvorgang erforderliche Zwangsführung der beiden Schwingkörper kann gemäss einer weiteren Ausführungsform der Erfindung dadurch erzeugt werden, dass die Antriebswelle des Motors mit einer Exzenter-Welle verbunden ist, die sowohl mit dem ersten als auch dem zweiten Schwingkörper direkt gekoppelt ist. Dadurch können beide Schwingkörper über eine gemeinsame Antriebswelle angetrieben werden, sodass das Vorsehen einer weiteren Antriebseinheit nicht notwendig ist.The positive guidance of the two oscillating bodies required for the sieving process can be produced according to a further embodiment of the invention in that the drive shaft of the motor is connected to an eccentric shaft, which is directly coupled to both the first and the second oscillating body. As a result, both oscillating bodies can be driven via a common drive shaft, so that the provision of a further drive unit is not necessary.
Zur Erzielung einer erhöhten Relativbewegung zwischen dem ersten und dem zweiten Schwingkörper kann die Exzenter-Welle zumindest einen aus einer ersten und einer zweiten Exzenterkurbel zusammengesetzten Doppel-Exzenter aufweisen, wobei die erste Exzenterkurbel mit dem ersten Schwingkörper und die zweite Exzenterkurbel mit dem zweiten Schwingkörper gekoppelt ist. Mit Hilfe des Doppel-Exzenters sind die kreisförmigen Bewegungen der beiden Schwingkörper so zueinander versetzt, dass die mit diesen verbundenen Querträger die Siebschwingung der Siebbeläge in geeigneter Weise hervorrufen. Die Verwendung eines Doppel-Exzenters bringt gegenüber einem Einfach-Exzenter geringere Durchmesserdimensionen, ein Lagerwechsel ist allerdings aufwendiger. Einfach-Exzenter und Doppel-Exzenter bewirken aber die gleiche Relativbewegung zwischen den beiden Schwingkörpern.To achieve an increased relative movement between the first and the second oscillating body, the eccentric shaft may comprise at least one of a first and a second eccentric crank composite double eccentric, wherein the first eccentric crank with the first oscillating body and the second eccentric crank is coupled to the second oscillating body. With the help of the double eccentric, the circular movements of the two oscillating bodies are offset from one another such that the cross members connected to them cause the screening of the screen coverings in a suitable manner. The use of a double eccentric brings compared to a single eccentric smaller diameter dimensions, bearing replacement is more complex. Single eccentric and double eccentric but cause the same relative movement between the two oscillating bodies.
Um die Schwingungsamplitude der Siebbeläge und damit die Belagsdehnung und Beschleunigung des Siebgutes verändern zu können, kann in weiterer Ausbildung der Erfindung die Exzentrizität e des zumindest einen Einfach-Exzenters bzw. Doppel-Exzenters in einem vorbestimmten Bereich einstellbar sein.In order to change the oscillation amplitude of the Siebbeläge and thus the covering elongation and acceleration of the material to be screened, in a further embodiment of the invention, the eccentricity e of the at least one single eccentric or double eccentric can be adjusted in a predetermined range.
Wenn die erste und die zweite Exzenterkurbel des Doppelexzenters relativ zur Exzenter-Welle um 180° versetzt sind, so kann die Relativbewegung zwischen den beiden Schwingkörpern maximiert werden. Es kann aber, falls erforderlich ein anderer Wert der Versetzung zwischen den Exzenterkurbeln gewählt werden.If the first and the second eccentric crank of the double eccentric are offset by 180 ° relative to the eccentric shaft, the relative movement between the two oscillating bodies can be maximized. However, if necessary, another value of the offset between the eccentric cranks may be selected.
Eine weitere Variante der Erfindung kann darin bestehen, dass der zweite Schwingkörper innerhalb des ersten Schwingkörpers angeordnet ist. Durch den Wegfall von sonst erforderlichen Durchbrüchen für Querträgerdurchführungen ist die staub- und wasserdichte Ausführung der erfindungsgemässen Siebvorrichtung gewährleistet.A further variant of the invention can consist in that the second oscillating body is arranged within the first oscillating body. The elimination of otherwise required breakthroughs for cross member bushings, the dustproof and waterproof design of the inventive screening device is guaranteed.
Es stellt eine vorteilhafte Fortbildung der Erfindung dar, wenn der erste Schwingkörper durch zwei parallele Aussenwangen gebildet ist, die durch die ersten Querträger miteinander verbunden sind, und der zweite Schwingkörper durch zwei innerhalb der parallelen Aussenwangen angeordneten, parallelen Innenwangen gebildet ist, die durch die zweiten Querträger miteinander verbunden sind und die ihrerseits parallel zu den beiden Aussenwangen angeordnet sind. Damit ist die Erregung des ersten und zweiten Schwingkörpers durch eine allein auf einer Seite positionierte Antriebseinheit möglich.It represents an advantageous development of the invention, when the first oscillating body is formed by two parallel outer cheeks, which are interconnected by the first cross member, and the second oscillating body is formed by two arranged inside the parallel outer cheeks, parallel inner cheeks, which through the second Cross members are interconnected and which in turn are arranged parallel to the two outer cheeks. Thus, the excitation of the first and second oscillating body is possible by a drive unit positioned alone on one side.
Um Ausnehmungen für den Bewegungshub der zweiten Querträger in den Aussenwangen des ersten Schwingkörpers zu vermeiden, können die Oberkanten der beiden Innenwangen gemäss einer weiteren Ausbildung der Erfindung jeweils abgewinkelt sein, und die zweiten Querträger auf den abgewinkelten Oberkanten aufliegen.To avoid recesses for the movement stroke of the second cross member in the outer cheeks of the first oscillating body, the upper edges of the two inner cheeks according to a further embodiment of the invention in each case angled, and rest the second cross member on the angled upper edges.
Da beide Schwingkörper bei Ankopplung über Doppel-Exzenter direkt an die Antriebseinheit angekoppelt sind und eine möglichst zentrale Einleitung der Antriebsdrehmomente vorteilhaft ist, kann eine Weiterbildung der Erfindung darin bestehen, dass die Exzenter-Welle sich normal zu den beiden Aussenwangen und den beiden Innenwangen durch diese hindurch erstreckt und zwei Doppel-Exzenter aufweist, wobei die ersten Kurbeln der Doppel-Exzenter in ersten Lagern der Aussenwangen und die zweiten Kurbeln der Doppel-Exzenter in zweiten Lagern der Innenwangen aufgenommen sind.Since both oscillating bodies are coupled directly to the drive unit when coupled via double eccentric and as central as possible introduction of the drive torque is advantageous, a development of the invention may consist in that the eccentric shaft is normal to the two outer cheeks and the two inner cheeks through this extends through and has two double eccentric, wherein the first cranks of the double eccentric are received in first bearings of the outer cheeks and the second cranks of the double eccentric in second bearings of the inner cheeks.
In besonders bevorzugter Weise erfolgt die Einleitung des Antriebsdrehmoments ungefähr im Massenschwerpunkt der erfindungsgemässen Vorrichtung, wobei die Exzenter-Welle mit den beiden Doppel-Exzentern ungefähr in Längsmitte und auf halber Höhe der Siebvorrichtung quer zur Längserstreckung derselben verläuft.In a particularly preferred manner, the introduction of the drive torque takes place approximately in the center of gravity of the inventive device, the eccentric shaft with the two double eccentrics approximately in the longitudinal center and at half the height of the screening device transverse to the longitudinal extent of the same.
Eine konstruktiv einfache und dennoch wirkungsvolle Lagerung des ersten Schwingkörpers kann dadurch erreicht werden, dass die beiden Aussenwangen des ersten Schwingkörpers durch Stützfeder-Elemente gegenüber dem Untergrund abgestützt sind.A structurally simple and yet effective bearing of the first oscillating body can be achieved in that the two outer cheeks of the first oscillating body are supported by support spring elements against the ground.
Der Aufgabebereich jeder Siebvorrichtung ist einer starken Belastung durch das von oben zugeführte Siebgut unterworfen, die eine sehr grosse Abnutzung des Siebbelages zur Folge hat, die zu einer Verschlechterung der Siebgüte führt. Um dem abzuhelfen, kann gemäss einer Variante der Erfindung im Aufgabebereich eine zumindest bereichsweise ungelochte, vorzugsweise konkav gekrümmte Aufgabefläche vorgesehen sein, an welche die in die alternierend angeordneten Querträger des ersten und zweiten Schwingkörpers eingespannten Siebbeläge unmittelbar angrenzen. Damit ist der vom Aufprall des aus einer Schüttvorrichtung zugeführten Siebgutes betroffene Teil der Siebvorrichtung nicht am Aussiebungsprozess beteiligt, weshalb dieser Bereich das Siebergebnis nicht negativ beeinflussen kann.The task area of each screening device is subjected to a heavy load by the material to be screened in from above, which results in a very great wear of the screen lining, which leads to a deterioration of the screen quality. To remedy this, according to a variant of the invention, an at least partially unperforated, preferably concavely curved feed surface can be provided in the feed area, against which the screen coverings clamped in the alternately arranged cross members of the first and second oscillating bodies are directly adjacent. Thus, the part of the screening device affected by the impact of the bulk material fed from a bulk material is not involved in the screening process, which is why this range can not adversely affect the sieving result.
Es kann dabei die gleiche Einspanntechnik für die Realisierung der ungelochten Aufgabefläche Verwendung finden wie für die gelochten Siebbeläge, insbesondere kann der erste Schwingkörper im Aufgabebereich zumindest zwei Aufgabe-Querträger aufweisen, zwischen denen ein oder mehrere Beläge, vorzugsweise ungelochte Siebbeläge einspannbar sind, welche die Aufgabefläche ausbilden.It may be the same clamping technique for the realization of the non-perforated task surface use as for the perforated screen coverings, in particular, the first oscillating body in the task area have at least two task cross member between which one or more coverings, preferably unperforated Siebbelägen can be clamped, which the task area form.
Auch der Abgabebereich ist einer erhöhten mechanischen Beanspruchung unterworfen, weshalb es vorteilhaft ist, wenn im Abgabebereich eine im wesentlichen waagrechte Stützfläche ausgebildet ist, auf der sich ein einseitig in einem der Querträger des ersten Schwingkörpers eingespannter Siebbelag erstreckt.The dispensing area is also subject to increased mechanical stress, which is why it is advantageous if, in the dispensing area, a substantially horizontal support surface is formed on which a screen covering is clamped on one side in one of the transverse beams of the first vibrating body.
Nachfolgend wird die Erfindung anhand des in den beigeschlossenen Zeichnungen dargestellten Ausführungsbeispiels erläutert. Es zeigt dabei
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Fig.1 einen Aufriss einer Ausführungsform der erfindungsgemässen Siebvorrichtung; -
Fig.2 einen Seitenriss der inFig.1 gezeigten Siebvorrichtung; -
Fig.3 einen schematischen Aufriss einer weiteren Ausführungsform der Erfindung; -
Fig.4 einen schematischen Seitenriss der inFig.3 gezeigten Siebvorrichtung; -
Fig.5 einen schematischen Grundriss der inFig.3 gezeigten Siebvorrichtung; -
Fig.6 ein Detail des Aufgabebereiches der Vorrichtung gemässFig.3 im Längsschnitt; -
Fig.7 einen Grundriss des Details nachFig.6 ; -
Fig.8 ein Detail des Abgabebereiches der Vorrichtung gemässFig.3 ; -
Fig.9 einen Grundriss des Details nachFig.8 ; -
Fig.10 eine vergrösserte Darstellung eines Querschnitts durch einen Querträger der Vorrichtung nachFig.3 ; -
Fig.11 einen Grundriss der Darstellung inFig.10 ; -
Fig.12 ein Detail der Ausführungsform der erfindungsgemässen Vorrichtung nachFig.3 im Aufriss; -
Fig.13 einen Seitenriss des Details nachFig.12 ; -
Fig.14 einen Aufriss eines Details der Ausführungsform der erfindungsgemässen Vorrichtung nachFig.1 ; -
Fig.15 einen Querschnitt des Details nachFig.14 ; -
Fig.16 einen Aufriß eines Details einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung; -
Fig.17 einen Seitenriß des Details nachFig.16 ; -
Fig.18 einen Aufriß eines Details einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung; -
Fig.19 einen Seitenriß des Details nachFig. 18 ; -
Fig. 20 ein Detail einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung und -
Fig. 21 ein Detail einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung.
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Fig.1 an elevation of an embodiment of the inventive sieve device; -
Fig.2 a side view of the inFig.1 shown screening device; -
Figure 3 a schematic elevation of another embodiment of the invention; -
Figure 4 a schematic side elevation of theFigure 3 shown screening device; -
Figure 5 a schematic floor plan of inFigure 3 shown screening device; -
Figure 6 a detail of the task of the device according toFigure 3 in longitudinal section; -
Figure 7 a floor plan of the detail afterFigure 6 ; -
Figure 8 a detail of the delivery area of the device according toFigure 3 ; -
Figure 9 a floor plan of the detail afterFigure 8 ; -
Figure 10 an enlarged view of a cross section through a cross member of the device according toFigure 3 ; -
Figure 11 a floor plan of the representation inFigure 10 ; -
Figure 12 a detail of the embodiment of the inventive device according toFigure 3 in the elevation; -
Figure 13 a side view of the detail afterFigure 12 ; -
Figure 14 an outline of a detail of the embodiment of the inventive device according toFig.1 ; -
Figure 15 a cross section of the detail afterFigure 14 ; -
Figure 16 an elevation of a detail of another embodiment of the device according to the invention; -
Figure 17 a side view of the detail afterFigure 16 ; -
Figure 18 an elevation of a detail of another embodiment of the device according to the invention; -
Figure 19 a side view of the detail afterFig. 18 ; -
Fig. 20 a detail of another embodiment of the device according to the invention and -
Fig. 21 a detail of another embodiment of the device according to the invention.
Die in den
Um die elastischen Siebbeläge 21 (strichliert gezeichnet) zwischen je einem ersten 8 und je einem zweiten Querträger 9 einspannen zu können, sind diese alternierend mit gleichen Abständen zueinander angeordnet und mit Einspannvorrichtungen 23 versehen, wie dies in den
Durch dichtendes Aneinanderreihen von mehreren Siebbelägen 21 auf den Querträgern 8, 9 entsteht die durch die Siebvorrichtung sich erstreckende Siebbahn, entlang der das Siebgut während des Siebprozesses vom Aufgabebereich 17 zum Abgabebereich 18 bewegt wird. Während dieser Bewegung findet eine Trennung zwischen dem Überkorn, das am Ende der Siebbahn über den Abgabebereich 18 abgeführt wird und dem Feinkorn statt, welches durch die Lochung der Siebbeläge 21 hindurch auf die darunterliegende Ebene gelangt und von dort weiterbewegt wird.By sealing juxtaposition of
Eine Antriebseinheit, die durch eine Rotations-Antriebseinheit, vorzugsweise einen Motor 3 gebildet ist, ist direkt mit dem ersten Schwingkörper 1 gekoppelt.A drive unit, which is formed by a rotary drive unit, preferably a
Erfindungsgemäß ist nun der zweite Schwingkörper 2 gegenüber dem ersten Schwingkörper 1 zwangsgeführt. Jedes auf den ersten Schwingkörper 1 wirkende Drehmoment ist immer auf den zweiten Schwingkörper 2 bezogen, weshalb im Betrieb die Schwingungsamplitude der Siebbeläge weitgehend konstant gehalten werden können.According to the second
Ein Antriebsform dieser Art ist in
Bei dem in
Aus der zwangsgeführten Bewegung des ersten Schwingkörpers 1 und des zweiten Schwingkörpers 2 werden die in den ersten 8 und zweiten Querträgern 9 eingespannten Siebbeläge 21 periodisch zwischen einer gestreckten und einer gestauchten Lage hinund herbewegt, woraus sich die Siebschwingung ergibt, welche sicherstellt, daß die Löcher der Siebbeläge 21 durch das Siebgut nicht verlegt werden. In
Als Antriebseinheit für die erfindungsgemäße Siebvorrichtung können elektrische oder hydraulische Motoren eingesetzt werden, die bevorzugte Betriebsfrequenz der erfindungsgemäßen Siebvorrichtung wird bei einer Umdrehungszahl des Motors 3 im Bereich von 400 bis 1000 U/min erreicht.As a drive unit for the screening device according to the invention electrical or hydraulic motors can be used, the preferred operating frequency of the screening device according to the invention is achieved at a speed of rotation of the
Die Antriebswelle 13 des Motors 3 ist in
Vorzugsweise ist der erste Schwingkörper 1 durch zwei parallele Außenwangen 11, die durch die ersten Querträger 8 miteinander verbunden sind, und der zweite Schwingkörper 2 durch zwei innerhalb der parallelen Außenwangen 11 angeordnete, parallele Innenwangen 12 gebildet, die durch die zweiten Querträger 9 miteinander verbunden sind und die ihrerseits parallel zu den beiden Außenwangen 11 angeordnet sind. Dadurch können der erste 1 und der zweite Schwingkörper 2 parallele Drehbewegungen ausführen, sodaß eine geeignete Streck- und Stauchbewegung der einzeln eingespannten Siebbeläge 21, die aus Kunststoff, Gummi oder einem ähnlichen Material hergestellt sein können, hervorgerufen werden kann, wodurch höchste Beschleunigungen von den Siebbelägen 21 auf das Siebgut übertragen werden können.Preferably, the first oscillating body 1 by two parallel
Da beide Schwingkörper 1, 2 direkt angetrieben sind, bleibt die Amplitude des Schwingungsvorganges, welche die Siebbeläge 21 ausführen, von der Beladung durch Siebgut und von dessen Zustand weitgehend unabhängig konstant.Since both
Eine Besonderheit der Konstruktion der in den
Die Exzenter-Welle 6 erstreckt sich normal zu den beiden Außenwangen 11 und den beiden Innenwangen 12 durch diese hindurch und weist zwei Doppel-Exzenter 4, 5 mit ersten Kurbeln 30 und zweiten Kurbeln 31 auf, die mit dem ersten bzw. dem zweiten Schwingkörper 1, 2 gekoppelt sind. Es kann jede andere mechanisch gleichwertige Anordnung gewählt werden, die den gleichen Zweck erfüllt. Die ersten Kurbeln 30 der Doppel-Exzenter 4, 5 sind in ersten Lagern 35 der Außenwangen 11 und die zweiten Kurbeln 31 der Doppel-Exzenter 4, 5 in zweiten Lagern 36 der Innenwangen 12 aufgenommen.The
Die mit beiden Schwingkörpern 1, 2 verbundenen Doppel-Exzenter 4, 5 leiten in diese jeweils eine kreisförmige, zwangsgeführte Bewegung ein. Bevorzugt sind die erste 30 und die zweite Exzenterkurbel 31 relativ zur Exzenter-Welle 6 um 180° versetzt. Diese Versetzung, die im Rahmen der Erfindung auch einen anderen Wert annehmen kann, bewirkt im Betriebszustand der erfindungsgemäßen Siebvorrichtung eine erhöhte Relativbewegung bzw. Amplitude der Schwingkörper 1, 2. Pro Umdrehung der Exzenter-Welle 6 kommt es je einmal zum Stauchen und Strecken der Siebbeläge 21. Dieser Vorgang bewirkt den sogenannten Trampolin-Effekt, durch den Beschleunigungswerte bis zu 55g auf das Siebgut übertragen werden. Aus den erreichten Beschleunigungen können Meßgrößen für die Siebleistung und die Siebgüte abgeleitet werden.The
Weiters kann vorgesehen sein, daß die Exzentrizität e (
Auch bei der Ausführungsform der erfindungsgemäßen Vorrichtung gemäß
Es können auch mehrere Exzenterwellen zum Antrieb des ersten und des zweiten Schwingkörpers 1, 2 vorgesehen sein, es hat sich aber herausgestellt, daß eine ungefähr durch den Schwerpunkt hindurchverlaufende Exzenter-Welle 6 keine oder nur wenige störende Schwingungsresonanzen hervorruft. Die Exzenter-Welle 6 verläuft daher vorzugsweise mit den beiden Doppel-Exzentern 4, 5 ungefähr in Längsmitte und auf halber Höhe der Siebvorrichtung quer zur Längserstreckung derselben.It is also possible to provide a plurality of eccentric shafts for driving the first and second
Die beiden Außenwangen 11 des ersten Schwingkörpers 1 sind durch Stützfeder-Elemente 20 gegenüber dem Untergrund abgestützt, welche die Schwingungsbewegung des ersten Schwingkörpers 1 aufnehmen.The two
Da die Siebbeläge im Aufgabebereich einer herkömmlichen Siebvorrichtung gewöhnlicherweise einer starken Belastung ausgesetzt sind, ist bei der in
Am gegenüberliegenden Ende der erfindungsgemäßen Siebvorrichtung befindet sich, wie in
Die Realisierung eines definierten Bewegungsablaufes des zweiten Schwingkörpers 2, der nur über die Wellenlagerung verankert ist, ist durch eine Kopplung des ersten und zweiten Schwingkörpers 1, 2 über ein oder mehrere elastische Kopplungselemente 70, 71, 72, 73, wie in den
Die Ankopplung des zweiten Schwingkörpers 2 an den ersten Schwingkörper 1 durch das elastische Kopplungselement 70, 71, 72, 73 bewirkt, daß die aus den Schwingkörperbewegungen resultierenden Kräfte aufgenommen, gespeichert und wiederum an die Schwingkörper 1, 2 abgegeben werden, was zur Minimierung der Antriebskräfte genutzt wird.The coupling of the second
Erfindungsgemäß ist der erste und der zweite Schwingkörper 1, 2 durch das elastische Kopplungselement 70, 71, 72, 73, wie es in den
Durch die zwei Kopplungs-Achsen 107, 108 des elastischen Kopplungselements 70, 71, 72, 73 können, unabhängig davon ob Einfach- oder Doppel-Exzenter Anwendung finden, alle bei den kreisförmigen Bewegungen des ersten 1 und des zweiten Schwingkörpers 2 auftretenden Bewegungskomponenten, unter der Voraussetzung, daß diese beiden Achsen 107, 108 normal auf die Exzenter-Welle 6 stehen, vom elastischen Kopplungselement 70, 71, 72, 73 aufgenommen werden.By the two
In der Ausführungsform gemäß
Ebenso kann umgekehrt das andere Ende der Blattfeder 80 mit der einen Außenwange 11 und das eine Ende der Blattfeder 80 zusammen mit den beiden schubelastischen Elementen 82 mit der einen Innenwange 12 verbunden sein.Similarly, conversely, the other end of the
Bei vertikaler Orientierung der Blattfeder 80, wie dies in der Ausführungsform gemäß
In der Ausführungsform gemäß
Das ringförmige, elastische Element 90 ist als Zylinderring ausgebildet ist, dessen Dicke zwischen dem Ringinnendurchmesser d und dem Ringaußendurchmesser D eine Einschnürung aufweist, wobei das Verhältnis von Ringaußendurchmesser D zu Ringinnendurchmesser d größer als 2,5 beträgt. Zur mechanischen Ankopplung des Innen- und Außenbereiches des ringförmigen Elements kann dieses nach außen und nach innen hin jeweils auf einen Außen- 98 und Innen-Metallring 99 z.B. aufvulkanisiert sein, sodaß sich eine unlösbare Verbindung ergibt, wobei der Innen-Metallring 99 z.B. durch einen leichten Preßsitz fest mit dem zylindrischen Konsolelement 92 verbunden ist. Der Außen-Metallring 99 wird so mit dem ringförmigen, elastischen Element 90 in die hohlzylindrische Halterung 91, 94 eingepreßt, daß der Außen-Metallring 99 fest mit dieser verbunden ist und sich im ringförmigen,elastischen Element 90 eine entlang seines Außenumfangs radial nach innen gerichtete Vorspannung einstellt, die sicherstellt, daß das ringförmige, elastische Element 90 in der Bewegungsebene durch die Relativbewegung der beiden Schwingkörper 1, 2 in keiner Richtung unter eine Zugspannung gesetzt wird. Der Bewegungshub kann dabei z.B. 5 bis 20mm betragen. Insgesamt ist der Schwingkörper 1 mit dem ringförmigen Element 90 und dieses mit dem Schwingkörper 2 fest verbunden, sodaß das ringförmige Element 90 im Betrieb der erfindungsgemäßen Vorrichtung zwar durch die Relativbewegungen Energie aufnimmt und wieder abgibt, selbst aber keinerlei Rotations-Bewegung gegenüber dem Schwingkörper 1 und 2 ausführt.The annular,
Weiters sind im ringförmigen, elastischen Element 90 in Dickenrichtung mehrere Durchbrechungen 97 zur Beeinflussung seiner Federsteifigkeit ausgebildet.Furthermore, a plurality of
Durch die ringförmige Ausbildung des elastischen Elements, z.B. Gummielements, werden Relativbewegungen zwischen dem ersten 1 und dem zweiten Schwingkörper 2 nicht nur in Richtung der Normalachsen 107, 108 sondern in allen Richtungen unmittelbar in radial wirkende Streckungen oder Stauchungen umgewandelt. Aufgrund der wirkenden Vorspannung wird das ringförmige, elastische Element 90 insgesamt nur gepreßt und nicht gezogen. Die Ankopplung des ringförmigen Elements 90 kann im Rahmen der Erfindung auch anders als es in
Ein weiteres Ausführungsbeispiel ist in
Schließlich ist das Ausführungsbeispiel gemäß den
Claims (23)
- Screening apparatus, having a first vibrating body (1) which is provided with first crossmembers (8), and having a second vibrating body (2) which is provided with second crossmembers (9), the first and second crossmembers (8, 9) being positioned in alternation and having clamping devices (23) so that elastic screen linings (21) may be clamped between one first crossmember (8) and one second crossmember (9) in each case, and having a drive unit (3) which is directly coupled to the first vibrating body (1) and by means of which the first vibrating body (1) is positively driven, so that the clamped elastic screen linings (21) are moved back and forth between a stretched position and a contracted position, the second vibrating body (2) being positively driven with respect to the first vibrating body (1) by means of an eccentric shaft (6), and the first vibrating body (1) and the second vibrating body (2) being connected to one another by at least one elastic coupling element (70, 71, 72, 73) which vibrationally couples the first and the second vibrating bodies (1, 2) in an elastic manner essentially along a coupling axis (107), characterized in that the at least one elastic coupling element (70, 71, 72, 73) vibrationally couples the first and the second vibrating bodies (1, 2) in an elastic manner along at least one further coupling axis (108).
- Screening apparatus according to Claim 1, characterized in that the further coupling axis (108) is oriented perpendicular to the coupling axis (107).
- Screening apparatus according to Claim 1 or 2, characterized in that the at least one elastic coupling element (70) includes a leaf spring (80) and two shear elastic elements (82), the two shear elastic elements (82) being connected to one end of the leaf spring (80) at its oppositely situated sides and connected to one of the outer faces (11) of the first vibrating body (1), and the other end of the leaf spring (80) being connected to one of the inner faces (12) of the second vibrating body (2), or vice versa.
- Screening apparatus according to Claim 1, characterized in that the at least one elastic coupling element (71) includes a ring-shaped elastic element (90) which on its outer circumference is enclosed by a hollow cylindrical mounting (91) which is adapted to the ring outer diameter (D), and which in its inner circumference engages with a cylindrical bracket element (92) which is adapted to the ring inner diameter (d), the hollow cylindrical mounting (91) being connected to one of the outer faces (11) of the first vibrating body (1), and the cylindrical bracket element (92) being connected to one of the inner faces (12) of the second vibrating body (2), or vice versa.
- Screening apparatus according to Claim 4, characterized in that the ring-shaped elastic element (90) is designed as a cylindrical ring whose thickness has a constriction between the ring inner diameter (d) and the ring outer diameter (D), the ratio of the ring outer diameter (D) to the ring inner diameter (d) being greater than 2.5.
- Screening apparatus according to Claim 1 or 2, characterized in that the at least one elastic coupling element (72) includes an outer bracket element (101) and a coaxially aligned inner bracket element (102) which projects into the outer bracket element, and tension springs and compression springs (103, 104), respectively, are situated between oppositely situated surfaces of the inner bracket element (102) and of the outer bracket element (101), respectively parallel to the coupling axis (107) and parallel to the further coupling axis (108) of the elastic coupling element (72) which is perpendicular to the coupling axis.
- Screening apparatus according to Claim 1 or 2, characterized in that the at least one elastic coupling element (73) includes an angle bracket (113) and an intermediate frame (112) which encloses the angle bracket, and shear elastic elements (114) are situated along the coupling axis (107) of the elastic coupling element (73), between oppositely situated surfaces of the angle bracket (113) and of the intermediate frame (112), and further shear elastic elements (111) are situated along the further coupling axis (108) of the elastic coupling element (73), between oppositely situated surfaces of the intermediate frame (112) and angle supports (110) positioned outside the intermediate frame (112), and the angle bracket (113) is connected to one of the inner faces (12) of the second vibrating body (2), and the angle supports (110) are connected to one of the outer faces (11) of the first vibrating body (1).
- Screening apparatus according to one of Claims 1 through 7, characterized in that the drive unit is formed by a rotary drive unit, preferably a motor (3).
- Screening apparatus according to one of Claims 1 through 8, characterized in that the drive shaft (13) of the motor (3) is connected to an eccentric shaft (6), and the eccentric shaft (6) has at least one single eccentric which includes an eccentric crank (33), and the eccentric crank (33) is coupled to the first vibrating body (1), and the eccentric shaft (6) is guided in the second vibrating body (2).
- Screening apparatus according to one of Claims 1 through 8, characterized in that in addition, the second vibrating body (2) is directly coupled to the drive unit (3) or to another drive unit, and is positively driven via same.
- Screening apparatus according to Claim 10, characterized in that the drive shaft (13) of the motor (3) is connected to an eccentric shaft (6), which is directly coupled to both the first vibrating body (1) and the second vibrating body (2).
- Screening apparatus according to Claim 11, characterized in that the eccentric shaft (6) has at least one double eccentric (4, 5) composed of a first eccentric crank (30) and a second eccentric crank (31), the first eccentric crank (30) being coupled to the first vibrating body (1), and the second eccentric crank (31) being coupled to the second vibrating body (2).
- Screening apparatus according to one of Claims 9 through 12, characterized in that the eccentricity (e, e1) of the at least one single eccentric or of the at least one double eccentric (4, 5) may be set in a predetermined range
- Screening apparatus according to Claim 12, characterized in that the first eccentric crank (30) and the second eccentric crank (31) are offset by 180 degrees relative to the eccentric shaft (6).
- Screening apparatus according to one of Claims 1 through 14, characterized in that the second vibrating body (2) is situated within the first vibrating body (1).
- Screening apparatus according to Claim 15, characterized in that the first vibrating body (1) is formed by two parallel outer faces (11) which are connected to one another via the first crossmembers (8), and the second vibrating body (2) is formed by two parallel inner faces (12) which are situated within the parallel outer faces (11), and which are connected to one another via the second crossmembers (9) and situated parallel to the two outer faces (11).
- Screening apparatus according to Claim 16, characterized in that the upper edge of each of the two inner faces (12) is angled, and the second crossmembers (9) rest on the angled upper edges.
- Screening apparatus according to one of Claims 12 through 17, characterized in that the eccentric shaft (6) extends perpendicular to and passes through the two outer faces (11) and the two inner faces (12), and has two double eccentrics (4, 5), the first cranks (30) of the double eccentric (4, 5) being accommodated in first bearings (35) of the outer faces (11), and the second cranks (31) of the double eccentric (4, 5) being accommodated in second bearings (36) of the inner faces (12).
- Screening apparatus according to Claim 18, characterized in that the eccentric shaft (6) together with the two double eccentrics (4, 5) extends approximately in the longitudinal center of, and at half the height of, the screening apparatus, transverse to the longitudinal extension thereof.
- Screening apparatus according to one of Claims 16 through 19, characterized in that the two outer faces (11) of the first vibrating body (1) are supported with respect to the base surface by support spring elements (20).
- Screening apparatus according to one of the preceding claims, characterized in that in the feed region (17) a feed surface (39) is provided which preferably has a concave curvature and is unperforated, at least in places, and which is directly adjoined by the screen linings (21) which are clamped in the alternatingly positioned crossmembers (8, 9) of the first vibrating body (1) and second vibrating body (2), respectively.
- Screening apparatus according to Claim 21, characterized in that in the feed region (17) the first vibrating body (1) has at least two feed crossmembers (15), between which one or more linings, preferably unperforated screen linings (22), which form the feed surface (39) may be clamped.
- Screening apparatus according to one of the preceding claims, characterized in that in the discharge region (18) an essentially horizontal support surface (26) is provided, on which a screen lining (27) which is clamped on one side in one of the crossmembers (8) of the first vibrating body (1) extends.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT3432003 | 2003-03-07 | ||
AT0034303A AT411874B (en) | 2003-03-07 | 2003-03-07 | Sieve for classification of bulk grains has first motor-driven sieve panel located over a second directly driven sieve panel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1454679A1 EP1454679A1 (en) | 2004-09-08 |
EP1454679B1 true EP1454679B1 (en) | 2010-11-03 |
Family
ID=29588416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04450042A Expired - Lifetime EP1454679B1 (en) | 2003-03-07 | 2004-03-01 | Screening device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1454679B1 (en) |
AT (2) | AT411874B (en) |
DE (1) | DE502004011838D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015032584A1 (en) | 2013-09-09 | 2015-03-12 | Wacker Chemie Ag | Classifying of polysilicon |
Families Citing this family (20)
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DE102013018873B3 (en) * | 2013-11-12 | 2014-11-27 | Schenck Process Gmbh | screening device |
DE102016011817A1 (en) * | 2016-10-05 | 2018-04-05 | Hein, Lehmann Gmbh | Torque screening machine with optimized screen lining attachment |
DE102016011816A1 (en) | 2016-10-05 | 2018-04-05 | Hein, Lehmann Gmbh | Torque screening machine with optimized transport performance |
CN106733611A (en) * | 2016-12-20 | 2017-05-31 | 贵州芭田生态工程有限公司 | Straight line shaker with self-cleaning structure |
CN107716262A (en) * | 2017-11-08 | 2018-02-23 | 刘全义 | Guipure equals back the method that sieve carries out grain impurity-removing |
CN107838021B (en) * | 2017-12-12 | 2020-10-20 | 安徽正特机电科技有限公司 | Superfine natural pearl powder screening plant |
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CN108855894A (en) * | 2018-08-03 | 2018-11-23 | 安徽理工大学 | A kind of hand-rail type water jet abrasive screen device |
EP3714996A1 (en) * | 2019-03-29 | 2020-09-30 | Binder + Co AG | Screening device |
CN111001558A (en) * | 2019-12-18 | 2020-04-14 | 广西安硕尔安全技术有限责任公司 | Seat type coupling vibration screening machine |
CN113318977A (en) * | 2020-09-29 | 2021-08-31 | 湖南海联食品有限责任公司 | Fruit size separator |
CN113333269B (en) * | 2021-04-27 | 2022-10-11 | 江西创驰橡胶有限公司 | Preparation and processing method of natural rubber |
CN113546834A (en) * | 2021-06-10 | 2021-10-26 | 泉州平旺科技有限公司 | Mechanical peanut seed selection equipment |
CN114130657B (en) * | 2021-11-22 | 2023-06-13 | 宁夏卫农农业发展有限公司 | Multistage sterilization screening plant of seed of growing seedlings |
CN114226227B (en) * | 2021-12-17 | 2023-12-26 | 朱亚凤 | Material screening equipment for building engineering |
CN114273210A (en) * | 2021-12-20 | 2022-04-05 | 徐州安高新型建材产业技术研究院有限公司 | Pretreatment device and pretreatment method for high-dust grit material |
CN114210559B (en) * | 2021-12-22 | 2023-03-21 | 遂宁安通商品混凝土有限公司 | Grit aggregate production system |
CN114377958B (en) * | 2021-12-27 | 2024-03-22 | 罗邦任 | Building construction sand stone screening sorter |
CN115007297B (en) * | 2022-06-24 | 2023-07-18 | 内蒙古民族大学 | Negative pressure laminating formula medicinal material that covers is processing apparatus that circles round |
CN116984089B (en) * | 2023-09-26 | 2023-12-22 | 河南佑民生物科技股份有限公司 | Drying granulator |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1206372B (en) * | 1964-09-26 | 1965-12-09 | Albert Wehner | Screen grate |
AT379088B (en) * | 1984-02-10 | 1985-11-11 | Binder Co Ag | SCREEN DEVICE |
DE3524895C1 (en) * | 1985-07-12 | 1986-12-18 | Hein, Lehmann AG, 4000 Düsseldorf | Screening machine |
-
2003
- 2003-03-07 AT AT0034303A patent/AT411874B/en not_active IP Right Cessation
-
2004
- 2004-03-01 EP EP04450042A patent/EP1454679B1/en not_active Expired - Lifetime
- 2004-03-01 AT AT04450042T patent/ATE486670T1/en active
- 2004-03-01 DE DE502004011838T patent/DE502004011838D1/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015032584A1 (en) | 2013-09-09 | 2015-03-12 | Wacker Chemie Ag | Classifying of polysilicon |
DE102013218003A1 (en) | 2013-09-09 | 2015-03-12 | Wacker Chemie Ag | Classifying polysilicon |
US10589318B2 (en) | 2013-09-09 | 2020-03-17 | Wacker Chemie Ag | Classifying polysilicon |
Also Published As
Publication number | Publication date |
---|---|
ATA3432003A (en) | 2003-12-15 |
ATE486670T1 (en) | 2010-11-15 |
DE502004011838D1 (en) | 2010-12-16 |
AT411874B (en) | 2004-07-26 |
EP1454679A1 (en) | 2004-09-08 |
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