WO2016142003A1 - Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire - Google Patents

Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire Download PDF

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Publication number
WO2016142003A1
WO2016142003A1 PCT/EP2015/065093 EP2015065093W WO2016142003A1 WO 2016142003 A1 WO2016142003 A1 WO 2016142003A1 EP 2015065093 W EP2015065093 W EP 2015065093W WO 2016142003 A1 WO2016142003 A1 WO 2016142003A1
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WO
WIPO (PCT)
Prior art keywords
resonator
rod
shaped portion
screen
sieve
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.)
Ceased
Application number
PCT/EP2015/065093
Other languages
German (de)
English (en)
Inventor
Peter Solenthaler
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.)
Telsonic Holding AG
Original Assignee
Telsonic Holding AG
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
Application filed by Telsonic Holding AG filed Critical Telsonic Holding AG
Priority to JP2017547483A priority Critical patent/JP6861163B2/ja
Priority to EP16709397.0A priority patent/EP3268137B1/fr
Priority to PCT/EP2016/055099 priority patent/WO2016142454A2/fr
Priority to US15/556,475 priority patent/US10413942B2/en
Publication of WO2016142003A1 publication Critical patent/WO2016142003A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B07B1/18—Drum screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • 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
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • 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
    • B07B2230/00—Specific aspects relating to the whole B07B subclass
    • B07B2230/04—The screen or the screened materials being subjected to ultrasonic vibration
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Definitions

  • the present invention relates to screen systems with substantially cylindrical jacket-shaped, in particular substantially circular cylindrical jacket screen surfaces and resonators for introducing ultrasonic vibrations according to the preamble of independent claim 1 as well as eddy current screening machines and uses of screening systems or eddy current screening machines.
  • Such screen systems with, for example, circular cylinder jacket-shaped screen surfaces can be used, for example, in known eddy current screening machines.
  • Wirbelstromsiebmaschinen Siebgut is introduced into a screen chamber, where it is excited by means of a rotor, which is arranged in an enclosed by the screen surface ⁇ Senen interior, to a turbulent flow.
  • fines are promotes ⁇ through the screen through ge, whereas coarse material is conveyed to an end of the screen surface is arranged ⁇ Grobgutausgang.
  • a screen basket contains three sleeves, between which a mesh fabric made of plastic is stretched.
  • the cuffs are braced together by means of struts.
  • the screen basket is connected via Schwingungsübertra ⁇ ger directly with vibration generators, which are attached to one of the sleeves.
  • the vibrators oscillate at a frequency of 30 to 200 Hz or even at ultrasonic frequencies.
  • the vibration transformers are fastened to one of the sleeves, only an indirect transmission of the ultrasonic vibrations to the screening fabric takes place.
  • the German utility model DE 20 2012 011 921 Ul shows a screening device whose Sieblage is compacted by a forming process.
  • the Sieblage can be excited with an ultrasonic generator.
  • An embodiment of the screening device includes a screen cylinder for use in a Wirbelstromsiebmaschine.
  • the screening fabric of the screening device is glued with three sleeves, of which the two outer sleeves are pressed apart by means of a tensioning device with three threaded rods.
  • the vibrations are transmitted via a feed rod exclusively via the middle sleeve on the mesh. Again, therefore, there is no direct stimulation of the mesh, so that a sufficient ultrasound introduction into the mesh is possible only with relatively high energy consumption.
  • the German utility model DE 20 2012 101 287 Ul discloses ei ⁇ nen cylindrical or frusto-conical strainer basket.
  • This screen basket has a mesh fabric be ⁇ is made of metal wires which are sintered together.
  • vibrations are transmitted to a central collar, where the screen surfaces are buildin ⁇ Untitled.
  • two vibration generators are provided, once in the ultrasonic range and once in a low-frequency range. Similar to DE 10 2012 104 577 AI but here, the vibration transformer are not attached to the screen surfaces, so that even in this known screen system can not be done sufficient ultrasonic introduction into the mesh.
  • WO 2009/071221 Al discloses a screening system with a tubular sieve. It is to increase the efficiency necessary to vibrate the sieve such that the amplitude of the ultrasonic vibration ⁇ has a component both in the radial and in the axial direction of the tubular screen.
  • two ultrasonic converters and two Zulei ⁇ tion sound conductors are provided, which are connected at contact points with a screen frame.
  • the screening system should therefore be a particularly effective introduction of the ultrasonic vibrations in the Allow sieve surface, with as little energy to be introduced.
  • a sieve system which contains: at least one first, substantially annular sieve carrier and a second, substantially annular sieve carrier,
  • At least one push rod which clamps the filter holders together in such a way that a compressive stress arises between the filter holders
  • At least one resonator for introducing ultrasonic vibrations directly into the screen surface, wherein the resonator in particular forms the push rod.
  • the screen surface may be formed, for example, as a screen fabric. Between the sieve carriers, the sieve surface extends along a longitudinal direction.
  • the portafilters are designed and arranged relative to one another such that the screen surface clamped between them has a substantially cylinder jacket-shaped form.
  • a surface in particular a screen surface
  • a cylinder-jacket-shaped form is understood to mean a surface which results as a whole of sections which all run parallel to the longitudinal direction mentioned.
  • the two filter holders define two top surfaces of the cylinder.
  • the longitudinal direction and thus also the said distances are substantially perpendicular to these cover surfaces, so that there is a straight cylinder jacket.
  • both the first and the second portafilter are formed in a substantially annular shape and the screen surface is formed essentially circular-cylindrical.
  • the screen surface is thus formed in a circular line.
  • the conveyance of the material to be screened through the sieve surface with the aid of a rotor already described at the beginning is particularly effective and uniform.
  • the screen surface in the mentioned cross-sectional planes has other shapes and, for example, is polygonal, such as quadrangular or hexagonal.
  • the clamping of the screen surface creates a tensile stress between the screen carriers, which is compensated by the compressive stress generated by the pressure rod.
  • the push rod preferably also extends in the longitudinal direction.
  • the resonator is sawn vorzugt configured and arranged such that it can be subjected to ultra sonic vibrations ⁇ with a predetermined frequency to oscillate (for example by means of a Ultraschalleinleiters to be described below) in response. Oscillation in resonance is understood to mean not only oscillation at the maximum of the resonance curve, but also in a certain frequency range around this maximum, for example in a frequency range of approximately 3 dB around the maximum.
  • the resonator may be formed as a hollow profile and consist of known materials, such as chrome steel or plastic.
  • the resonator can form the push rod, so it can even interconnect the filter holders in such a way. tension that creates a compressive stress between the portafilters; In these embodiments, it is not necessary to further push rods. In other embodiments, the resonator is not a push rod that clamps the filter holders together in such a way that a compressive stress arises between the filter holders.
  • the resonator is attached to the screen surface and extends substantially from the first portafilter to the second portafilter.
  • the resonator does not necessarily have to be held by the first and / or the second filter holder.
  • the resonator extends along at least 60%, more preferably at least 80% and even more preferably at least 90% of the length of the screen surface measured in the longitudinal direction of the screen surface. Due to the attachment of the resonator directly to the screen surface, the ultrasonic vibrations can be introduced directly from the resonator into the screen surface. The introduction is thus not exclusively indirectly via a portafilter or another screen frame. Thus, no ultrasound vibrations must be introduced into the portafilter. Consequently, less has to be done
  • Ultrasonic energy are applied to initiate the Ultraschallschwin ⁇ conditions in the screen surface. Since, according to the invention, the resonator also extends substantially from the first filter holder to the second filter holder, the introduction of the ultrasound energy into the filter surface is increased even further.
  • the screen surface may have a length in the lengthwise direction in the range of 100 mm to 1000 mm and a diameter in the range of 100 mm to 500 mm.
  • the resonator can be held (directly or indirectly) on the first filter holder and / or on the second filter holder. Thus it is necessary
  • the resonator is held both on the first filter holder and on the second filter holder (directly or indirectly). Because then the pressure required for the clamping of the screen surface pressure between the two filter holders can be constructed not only by the push rod, but in addition by the resonator. As already explained, the push rod can also be through the resonator ge forms ⁇ so that in addition to the resonator no further pressure rods are required.
  • the resonator may have one or more nodes of vibration. Preferably, it has a first node on which it is held (directly or indirectly) on the first portafilter and / or a second node on which it is held (directly or indirectly) on the second portafilter.
  • the holding of the resonator at a vibration node has the advantage that substantially no ultrasonic vibrations are transmitted from the resonator to the respective portafilter.
  • the transmission of ultrasonic energy to components is suppressed (namely, the portafilter), which need not be excited for the actual function of sieving.
  • the resonator is held at the first vibration node via a first decoupling element on the first portafilter and / or is held at the second vibrational node via a second decoupling element on the second Siebträ ⁇ ger; the resonator is then held indirectly on the first and / or second portafilter.
  • the vibration nodes are preferably arranged in opposite end regions of the resonator. Here- By a shorter axial length of the decoupling elements can be achieved.
  • the resonator can be fastened to the screen carriers and can also transmit compressive forces
  • at least one of the decoupling elements is connected to the respective portafilter via a tensioning device, for example if the second decoupling element is connected to the second portafilter via a tensioning device
  • the clamping device can be formed for example by a provided with an external thread clamping element which is fixedly connected to the second Entkopp ⁇ ment element, a bore formed in the second filter holder and two clamping nuts. By interaction of the external thread with the bore and the clamping nuts, the clamping element can be attached to the second portafilter and clamped.
  • Said bore may be formed for example in a still be below ⁇ signed collar-shaped portion of the second filter holder.
  • the first decoupling element can likewise be connected to the first portafilter via a tensioning device. However, if the second decoupling element is already connected to the second portafilter via a tensioning device, the first decoupling element can also be fixedly connected to the first Siebträ ⁇ ger, for example by welding or screwing.
  • the push rod can also be connected to one or both filter carriers via a tensioning device as described above, it being sufficient if it is connected only to the second filter holder via a tensioning device, but is firmly connected to the first filter holder, for example by welding - screwing.
  • Such a sleeve-shaped section allows attachment of the screen surface, without having to be kinked or vice ⁇ bent. It is also advantageous if the screen surface is ⁇ be strengthened on the outside of the sleeve-shaped section is. Then namely the screen surface can be fixed by means of a clamping ring on the tubular portion. In addition, the screen surface may be glued to the carrier, in particular to the sleeve-shaped section. In the sleeve-shaped portion of the portafilter can be vorgese ⁇ hen in the direction of the other Siebträ ⁇ gers, ie in the longitudinal direction, at least one recess hen.
  • one end of the resonator and / or a decoupling element as described above may be presented ⁇ taken.
  • the recess thus makes it possible to bring the resonator and / or the decoupling element as close to the kragenför ⁇ -shaped section.
  • the collar-shaped section of the portafilter can ensure stable transmission of the compressive forces to the pressure bar.
  • the resonator can be acted upon by means of an ultrasonic initiator with ultrasonic vibrations.
  • the ultrasonic initiator may have a circular cross-section. It can be guided by a through opening formed in the first filter holder, in particular in the collar-shaped section of the first filter holder, in an intermediate region formed between the first filter holder and the second filter holder.
  • the ultrasound inlet is preferably guided without contact through the passage opening, so that no ultrasonic vibrations are transmitted to the Siebträ- ger.
  • the guidance of the ultrasound inlet through such a passage opening allows an advantageously straight design of the ultrasound inlet, whereby the ultrasound Sound vibrations can be better transmitted to the resonator.
  • the ultrasonic initiator is bent, for example.
  • the Ultraschalleinleiter can be held via a mounting tube which cut directly or indirectly to the collar-shaped From ⁇ and with the Ultraschalleinleiter may be associated with vibrations acting ultrasonic converter. Between ultrasonic inlet and the mounting tube, one or more sleeves may be arranged. Such sleeves can prevent the escape of screenings.
  • the attachment tube can be connected to the collar-shaped section via an intermediate piece.
  • the intermediate piece can be fastened by means of one or more screws on the collar-shaped portion of the portafilter.
  • the intermediate piece may have one or more radial extensions with openings through which screws can be screwed into the collar-shaped portion.
  • the resonator extends, for example in the form of a helix, from the first sieve carrier to the second portafilter to the second portafilter.
  • the resonator extends substantially in the longitudinal direction from the first filter holder to the second filter holder. As a result, the required length of the resonator can be reduced. By extending the resonator substantially in the longitudinal direction, the resonator can be built and assembled more easily without bending.
  • the resonator is fastened to the screen surface substantially along its entire length.
  • the resonator can be attached to the screen surface, for example, by gluing or soldering.
  • the resonator may have a rectangular cross-section perpendicular to the longitudinal direction. However, it may be advantageous if the resonator has a contact surface connected to the screen surface, which is adapted to the contour of the screen surface and, for example, is concave. This also increases the efficiency of the ultrasound introduction.
  • the resonator is arranged on an outer side of the screen surface and fastened there to it.
  • ⁇ by the movement of an already mentioned above, in an enclosed by the screen surface arranged rotor is not hindered.
  • the screening system contains a plurality of resonators.
  • these multiple resonators are then distributed around the circumference of the screen surface.
  • they can be evenly distributed around the circumference of the screen surface.
  • ultrasonic vibrations can be introduced more uniformly in the screen surface.
  • the filter system includes a plurality of pressure Stan ⁇ gen.
  • these several push rods are then evenly distributed around the circumference of the screen surface.
  • the sieve system can furthermore contain one or more ultrasound converters for generating the ultrasound oscillations, which can be fed to the ultrasound intruder.
  • the ultrasound inlet contains connection means for connection to one or more ultrasound converters, which is not necessarily part of the Sieve system must be.
  • the connecting means can be configured , for example, as a screw connection.
  • At least one resonator has at least one first rod-shaped section with a first end and a second end and has at least one second rod-shaped section with a first end and a second end.
  • first rod-shaped section but not also the second rod-shaped section, is fastened to the screen surface.
  • the first rod-shaped section at a first
  • Screen surface is fixed and the second rod-shaped portion is attached to a second screen surface.
  • the first ends of the first rod-shaped portion and the second rod-shaped portion are connected to each other, and the second ends of the first rod-shaped portion and the second rod-shaped portion are connected to each other.
  • a resonator By such a resonator with two rod-shaped sections, bending vibrations known per se can be introduced into the screen surface.
  • the amplitude of this gene Biegeschwingun- extends relative to a central axis of the screen system in egg ⁇ ner radial direction.
  • Such a resonator also has the advantage that the ultrasound can be introduced into the first rod-shaped section not only at the first end but also at the second end of the first rod-shaped section via the second rod-shaped section. In this way, in the first rod-shaped section, a more uniform vibration over the rod length is produced.
  • the vibration amplitudes are particularly small. This has the consequence that the resonator is more reliably attached to the screen surface, since an example provided adhesive bond dissolves less easily.
  • such a resonator is particularly easy to tune to the stimulating frequency by, for example, the length of a slot formed between the first rod-shaped portion and the second rod-shaped portion is tuned.
  • the said effects are particularly pronounced when the two rod-shaped sections and a central axis of the screen system run in a common radial plane.
  • the above-described embodiment of the resonator is not limited to sieve systems with annular sieve carriers, pressure rods and cylindrical jacket-shaped sieve surfaces. Rather, according to the invention, such resonators can also be used, for example, in sieve systems with a flat sieve surface.
  • the screen system contains at least one Ul ⁇ traschalleinleiter, by means of which the first ends of the first rod-shaped portion and the second rod-shaped portion can be acted upon by ultrasonic vibrations.
  • the ultrasonic initiator may have a circular cross-section. It can be connected to the resonator, for example by screwing or welding.
  • the resonator may have a connecting portion connecting the ultrasonic inducer to the first ends of the two bar-shaped portions. This connecting portion may have a rectangular cross-section.
  • first ends of the first rod-shaped portion and the second rod-shaped portion are connected to each other via a first U-shaped portion and the second ends of the first rod-shaped portion and the second rod-shaped portion via a second U-shaped portion with each other are connected, wherein the first U-shaped portion, the second U-shaped portion and a central axis of the screening system in a common Radialebe ⁇ ne extend.
  • the first U-shaped section and thus the first ends of the rod-shaped sections can be subjected to ultrasonic vibrations by means of an ultrasound inlet .
  • the first U-shaped section performs a Trans ⁇ formation of a longitudinal vibration of an ultrasonic A conductor in a bending vibration.
  • Such a resonator with two rod-shaped sections is likewise advantageously held only on one of the two filter holders, in particular on a filter holder, through which the ultrasonic conductor is passed into an intermediate region formed between the first filter holder and the second filter holder.
  • a Wirbelstromsieb ⁇ machine which contains at least one as described above, inventive Siebes system.
  • This Wirbelstromsiebmaschine may include a rotor which is arranged in a space enclosed by the screen surface interior.
  • the filters may be oriented within the WIR belstromsiebmaschine for example, so that its longitudinal direction ⁇ extends in horizontal or vertical direction.
  • the Wirbelstromsiebmaschine may include one or more ultrasonic ⁇ converter for generating the ultrasonic vibrations, which are fed to the Ultraschalleininleiter. Furthermore, the invention also relates to the use of a screening system according to the invention described above, or a As described above, according to the invention Wirbelstromsiebmaschine for control screening, separation, loosening, recovery and fractionation of screenings.
  • FIG. 1 shows a first perspective view of a first ER-screen system according to the invention, but without Siebflä ⁇ che;
  • FIG. 2 shows a second perspective view of the screening system according to FIG. 1 with screen surface
  • FIG. 3a shows a detail of a side view of a part of a first filter holder of the screen system and to a ers ⁇ tes decoupling element according to Figures 1 and 2;
  • FIG. 3b shows a detail of a side view of a part of a second screen carrier of the screening system and of a second decoupling element according to FIGS. 1 to 3a;
  • FIG. 4a shows a detail of a plan view of a part of the f ⁇ th filter holder and on the first Entkopplungsele ⁇ ment according to Figures 1 to 3b
  • Figure 4b shows a detail of a plan view of a part of the two ⁇ th filter holder and to the second Entkopplungsele ⁇ ment according to Figures 1 to 4;
  • FIG. 5a shows a perspective view of a second screen system according to the invention
  • FIG. 5b shows a perspective sectional view of the second screening system according to the invention.
  • FIG. 6 shows a lateral sectional view through the second screening system according to the invention according to FIGS. 5a and 5b.
  • the screen system 10 shown in Figure 1 includes a first annular portafilter 11 and a second annular portafilter 12, which are constructed identical to each other. In other, not shown embodiments, however, it is also conceivable that the two filter holders 11, 12 are not constructed identical to one another. Between the filter carriers 11, 12, a circular cylinder jacket-shaped screen surface 13 extending in a longitudinal direction L can be clamped; However, this Siebflä ⁇ surface 13 is shown for better illustration only in Figure 2.
  • Each of the two portafilters 11, 12 has in each case a sleeve-shaped section 16 or 17 and a crank-shaped section 18 or 19 projecting radially outwardly from the sleeve-shaped section 16 or 17.
  • a respective clamping ring 27, 28 is provided on both Siebträge 11, 12, of which only the second filter holder 12 arranged clamping ring 28 is visible here.
  • the sleeve-shaped sections 16, 17 furthermore each have four recesses 29 or 30 which are distributed uniformly in the circumferential direction and which extend in the direction of the respective other screen support 11, 12, ie also in the longitudinal direction L.
  • the resonators 15 each have a first and a second oscillation node. At the first oscillation node, the resonators 15 are held on the first portafilter 11 via a respective first decoupling element 22, and at the second oscillation node they are held on the second portafilter 12 via a respective second decoupling element 23. The ends of the resonators 15 are received in the recesses 29, 30 of the sleeve-shaped section 16, 17. In the collar-shaped section 18 of the first portafilter 11 four circumferentially uniformly distributed suitssöff ⁇ openings 24 are formed.
  • each an ultrasonic inlet 25 extends into a formed between the first filter holder 11 and the second filter holder 12 intermediate portion 26 of the screen system 10.
  • the ultrasonic entrances 25 are guided without contact through the passage openings 24, so that no ultrasonic vibrations be transferred directly to the first filter holder 11. They extend parallel to the longitudinal direction L of the screening system 10 and have a circular cross-section.
  • the screen system 10 may further include one or more ultrasonic transducers, not shown here, for generating the ultrasonic vibrations that can be fed to the ultrasound initiators 25 and then to the resonators 15.
  • the at least one ultrasound converter can be connected to the ultrasound injectors 25, for example via a screw connection.
  • Figure 2 shows the complete screening system 10 with screen surface 13.
  • the screen surface 13 is formed as a screen fabric and results as a set of routes, all of which are parallel to the longitudinal ⁇ direction L extend.
  • the screen surface 13 may have a length in the range of 100 mm to 1000 mm in the longitudinal direction L and a diameter in the range of 100 mm to 500 mm.
  • the screen surface 13 may also be glued to the outside of the sleeve-shaped portion 17. Other, not shown here attachment types of the screen surface 13, however, are also conceivable.
  • the resonators 15 are attached along their entire length by adhering to the outside of the screen surface 13. With the help of the two resonators 15 ultrasonic vibrations can be introduced into the screen surface 13. Due to the elongated From ⁇ formation of the resonators 15, these allow the generation of ultrasonic vibrations, which essentially comprise only one component in the longitudinal direction L of the screen system. The fastening of the resonators 15 along their entire length ensures a particularly effective sound introduction into the screen surface 13.
  • FIG. 3a shows a detailed side view for Fixed To ⁇ supply of the push rods 14 and the resonators 15 mentioned earlier on the first screen support 11.
  • the Ultraschalleinleiter 25 is guided without contact through the collar-shaped portion 18 formed in the passage opening 24th
  • the front end of the ultrasonic ⁇ leinleiter 25 is connected to the resonator 15 in order to transmit ultrasonic vibrations to this can.
  • the resonator 15 is held on the collar-shaped section 18 via the first decoupling element 22.
  • the first decoupling element 22 is fixed to the collar-shaped From ⁇ section 18 is connected, for example by a Schweissverbin- dung.
  • FIG. 4a substantially the same detail is shown in a plan view.
  • the attachment to the second portafilter 12 is designed differently, as is apparent from the detail views of Figures 3b and 4b.
  • the second decoupling element 23 is not fixedly connected to the sleeve-shaped portion 19.
  • a clamping device This contains a provided with an external thread clamping element 31 which is fixedly connected to the second decoupling element 23.
  • a bore 20 is provided in the sleeve-shaped portion 19 of the second portafilter 12.
  • the clamping element 31 and thus also the resonator 15 can be fastened and clamped on the sleeve-shaped section 19 of the second screen carrier 12.
  • the push rod 14 can be fastened and clamped in a bore 21 via a tensioning device (not shown in detail here).
  • FIG. 4b shows the substantially same section in a plan view.
  • the screen system 10 shown in FIGS. 1 to 4b can be used in an eddy-current screening machine, for example for control sieving, separating, loosening, recovering or fractionating screenings.
  • the Wirbelstromsieb ⁇ machine may include a rotor which is arranged in a space enclosed by the screen surface 13 interior. With the help of such a rotor can be excited in the interior screenings to a vortex flow, whereby fine material can be conveyed through the screen surface 13 through to the outside, while Grobgut can be conveyed to a arranged at the end of the screen surface Grobgutaus ⁇ gear.
  • the second inventive screen system 10 'shown in FIGS. 5a and 5b likewise contains a first annular portafilter 11' and a second annular portafilter 12 ', which are essentially mirrored to one another. Between the portafilters 11 ', 12' is a in a longitudinal direction L extending circular cylindrical shell Siebflä ⁇ che 13 'clamped.
  • the first portafilter 11 ' has a sleeve-shaped section 16', which can be seen only in FIG. 5b, and a collar-shaped section 18 'projecting radially outwards from the tubular section 16'.
  • the second sieve ⁇ carrier 12 ' has a sleeve-shaped portion 17' and one from the sleeve-shaped portion 17 'radially collar-shaped outwardly projecting portion 19'.
  • a respective clamping ring is provided for attachment of the screen surface 13 'on the outside of the sleeve-shaped sections on both Siebträge 11', 12 '.
  • a respective clamping ring is provided for attachment of the screen surface 13 'on the outside of the sleeve-shaped sections on both Siebträge 11', 12 '.
  • Attached to the collar-shaped sections 18 ', 19' are three push rods 14 ', uniformly distributed in the circumferential direction, which extend along the longitudinal direction L from the first filter holder 11' to the second filter holder 12 ', but only two of which are visible.
  • the push rods 14 ' are fixed by means of Spannmut ⁇ tern 40' to the filter holders 11 ', 12'.
  • a resonator 15 ' which extends, for example, from chromium steel or plastic, extends from the first sieve carrier 11' substantially as far as the second sieve carrier 12 '. can exist.
  • This resonator 15 ' has a first rod-shaped portion 32 having a first end 33 and a second end 34 and a second rod-shaped portion 35 having a first end 36 and a second end 37. Only the former th rod-shaped portion 32, but not also the second rod-shaped portion 35 is adhesively secured to the outside of the sieve ⁇ surface 13 '.
  • the first ends 33, 36 of the first rod- ⁇ shaped portion 32 and the second rod-shaped portion 35 are connected via a first U-shaped portion 38 with each other, and said second ends 34, 37 of the first bar-like portion 32 and the second rod-shaped portion 35 are connected via a second U-shaped portion 39 with ⁇ each other.
  • the first portafilter 11 'facing axial end (in Figure 6 left), the mounting tube 45' via an intermediate piece 47 'with the collar-shaped portion 18' is connected.
  • the intermediate piece 47 'does not include in FIG. identifiable radial projections with openings through which screws can be screwed into the collar-shaped portion 18 '.
  • the first U-shaped section 38 and thus the first ends 33, 36 of the rod-shaped sections 32, 35 can be acted upon by ultrasonic vibrations.
  • bending vibrations can be introduced into the screen surface 13 'through the resonator 15', with respect to the center axis M of the screen system 10 'in a radial direction.
  • the transformation of a longitudinal oscillation of an ultrasound conductor into a bending vibration is performed by the first U-shaped section 38.
  • the bending vibrations also shares of other vibration modes such as longitudinal vibrations may be present.
  • the resonator 15 moreover has the advantage that the ultrasound can be introduced not only at the first end 33 into the first rod-shaped section 32, but also via the second rod-shaped section 35 and the second U-shaped section 39 at the second end 34 of the first rod-shaped portion 32. In this way, in the first rod-shaped portion 32, a more uniform over the rod length oscillation.
  • the vibration amplitudes are particularly small. This has the consequence that the resonator 15 'is more reliably fixed to the screen surface 13', since the adhesive connection dissolves less easily.
  • the resonator 15 ' is particularly easy to tune to the stimulating frequency, for example, by the length of a formed between the first rod-shaped portion 32 and the second U-shaped portion 32 slot 42 is tuned.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne entre autres un système de tamisage (10) qui contient au moins un premier support de tamis (11) sensiblement annulaire et un deuxième support de tamis (12) sensiblement annulaire; au moins un tige de compression (14) qui sollicite mutuellement les supports de tamis (11, 12) de façon à créer une contrainte de compression entre les supports de tamis (11, 12); au moins une surface de tamis (13) sensiblement en forme d'enveloppe cylindrique, tendue entre les supports de tamis (11, 12); au moins un résonateur (15) servant à introduire des vibrations ultrasonores directement dans la surface de tamis (13). Le résonateur (15) est fixé à la surface de tamis (13) et s'étend sensiblement du premier support de tamis (11) au deuxième support de tamis (12). L'invention concerne en outre un tamiseur tourbillonnaire et une utilisation d'un système de tamisage (10) ou d'un tamiseur tourbillonnaire.
PCT/EP2015/065093 2015-03-10 2015-07-02 Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire Ceased WO2016142003A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2017547483A JP6861163B2 (ja) 2015-03-10 2016-03-10 スクリーニングシステム、渦電流スクリーニングマシン、およびスクリーニングシステムまたは渦電流スクリーニングマシンの使用
EP16709397.0A EP3268137B1 (fr) 2015-03-10 2016-03-10 Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire
PCT/EP2016/055099 WO2016142454A2 (fr) 2015-03-10 2016-03-10 Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire
US15/556,475 US10413942B2 (en) 2015-03-10 2016-03-10 Screening system, eddy-current screening machine, and use of a screening system or of an eddy-current screening machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/EP2015/054936 WO2016141971A1 (fr) 2015-03-10 2015-03-10 Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire
EPPCT/EP2015/054936 2015-03-10

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PCT/EP2015/065093 Ceased WO2016142003A1 (fr) 2015-03-10 2015-07-02 Système de tamisage, tamiseur tourbillonnaire et utilisation d'un système de tamisage ou d'un tamiseur tourbillonnaire

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CN108212778A (zh) * 2018-01-02 2018-06-29 繁昌县金牛机械铸造有限责任公司 一种便于拆卸清理的筛沙机
CN117920389A (zh) * 2024-02-20 2024-04-26 山东沃蓝生物集团有限公司 一种氰尿酸一体化生产用粉碎机

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DE102020134630A1 (de) 2020-12-22 2022-06-23 Raps Gmbh & Co. Kg Siebeinrichtung für eine Wirbelstrom-Siebmaschine, Spannanlage, Siebmaschine und Verfahren zum Montieren wenigstens eines Siebs an einer Siebeinrichtung

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Publication number Priority date Publication date Assignee Title
CN108212778A (zh) * 2018-01-02 2018-06-29 繁昌县金牛机械铸造有限责任公司 一种便于拆卸清理的筛沙机
CN108212778B (zh) * 2018-01-02 2020-12-04 繁昌县金牛机械铸造有限责任公司 一种便于拆卸清理的筛沙机
CN117920389A (zh) * 2024-02-20 2024-04-26 山东沃蓝生物集团有限公司 一种氰尿酸一体化生产用粉碎机

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