EP0084878B1 - Siebverfahren und Vorrichtung zur Ausübung - Google Patents

Siebverfahren und Vorrichtung zur Ausübung Download PDF

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Publication number
EP0084878B1
EP0084878B1 EP83100575A EP83100575A EP0084878B1 EP 0084878 B1 EP0084878 B1 EP 0084878B1 EP 83100575 A EP83100575 A EP 83100575A EP 83100575 A EP83100575 A EP 83100575A EP 0084878 B1 EP0084878 B1 EP 0084878B1
Authority
EP
European Patent Office
Prior art keywords
sieve
flat springs
sieving
cross bars
another
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
Application number
EP83100575A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0084878A2 (de
EP0084878A3 (en
Inventor
Fritz Sgaslik
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.)
Paul & Co Metallgewebe- U Filterfabrik GmbH
Original Assignee
Paul & Co Metallgewebe- U Filterfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Paul & Co Metallgewebe- U Filterfabrik GmbH filed Critical Paul & Co Metallgewebe- U Filterfabrik GmbH
Priority to AT83100575T priority Critical patent/ATE41888T1/de
Publication of EP0084878A2 publication Critical patent/EP0084878A2/de
Publication of EP0084878A3 publication Critical patent/EP0084878A3/de
Application granted granted Critical
Publication of EP0084878B1 publication Critical patent/EP0084878B1/de
Expired 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
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • 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
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/40—Resonant vibration screens
    • 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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes

Definitions

  • the invention relates to a sieving method in which the vibrations imparted to the sieve box are directed essentially perpendicular to the sieve plane, and to a device for carrying out this method.
  • a screening process and such a device are already known for. B. is known from US-A-2 617 533.
  • the invention therefore relates to vibrating sieves in which the sieve frame and sieve together carry out the same type of vibrations, essentially free-floating sieves with drive by mass force or sieves with a limited stroke with crank or eccentric drive.
  • All of these drives in a horizontal or slightly inclined arrangement of the screen box, today preferably convey circular or elliptical vibrations.
  • the mass of the sieve frame vibrates against resilient elements with a predetermined spring constant, so that the natural frequency and the critical speed can be predetermined according to known rules (see, for example, LUEGER, volume 49, page 583).
  • the vibrating basic system i.e. H. the sieve box
  • can therefore other vibratory systems d. H. Excite resonators, the frequency of the resonance vibrations of the resonator being equal to the frequency of the natural vibrations of the basic system.
  • the resonator in the resonance case absorbs the energy which is required to compensate for its internal damping, i. that is, a more or less large part of the energy imparted to the basic system is absorbed by the resonator. Regardless of this absorption, the mechanical efficiency of the vibrating screens is significantly improved by using the resonance principle.
  • the sieve plate or the sieve fabric - they are referred to uniformly as sieve plate in this analysis - even if there is no real training i.S. of the terminus technicus “resonance sieve”, in the case of vibrating sieves, additional resonance vibrations are stimulated by the basic system, the amplitude of which decreases towards the clamping points of the floor in the sieve box, d. that is, the sieve tray becomes a resonator in these cases.
  • the sieve design must be carefully coordinated on a case-by-case basis with regard to the sieving task to be solved.
  • This index number has a lower limit of up to approximately 1.6, with Kv values of 3 to 3.5 generally being used in the case of a sharp screening of goods which are difficult to screen. Furthermore, restrictive conditions apply to moist or sticky, i.e. H. fine material exhibiting strong surface forces. According to the already cited literature, one helps here by heating the sieve covering and evaporation of the water, the sieve generally being used as electrical resistance. However, these methods are complex and, at least not with certainty alone lead to the removal or avoidance of sieve smearing.
  • the solution of the method according to the invention provides that the vibrations imparted to the sieve box below the sieve plane perpendicular to the oscillation plane and perpendicular to the direction of the screenings overflow and lying on supports fixed in the sieve box excite resonant vibrations, the effective amplitudes of which are directed essentially one-sided towards the sieve bottom, and that in addition to their vertically directed movement, the flat springs move horizontally back and forth within a predetermined traveling distance.
  • the material overlaps perpendicular to the direction of the sieve material force components that move the springs back and forth according to the selected travel distance, the length of which was recognized as sufficient within the scope of this development with 2% to 10% - based on the sieve width.
  • a sieving machine suitable for practicing the method provides that transverse bars arranged at a distance below the sieve bottom in the sieve frame perpendicular to the direction of the material overflow are provided as a support for essentially zigzag-shaped flat springs,
  • V-shaped legs of each flat spring are bent in their end regions by approximately 90 °, in this case leading across the cross bars, and
  • the length of the flat springs is somewhat shorter than the clear width of the screen frame and these are designed to be displaceable in the direction of the cross bars.
  • V-shaped legs of each flat spring engage in one another in their end regions and in this case three cross bars each rest two flat springs.
  • the legs of the flat springs which are directed towards each other, be brought into each other by a cross section running approximately parallel to the cross bars.
  • this training results in the avoidance of plug-in grain and, overall, practically the maintenance of the active starting surface, i. H. with the same output, a smaller sieve size is possible or, if the sieve size is maintained, a larger output is possible.
  • the area load is lower compared to the previous cleaning devices (e.g. tapping devices).
  • the sieve bottom 2 forming the sieve plane is arranged in a tensioned manner in the usual way.
  • 2 rods 3 are fastened below the sieve bottom at a distance from the underside of the sieve bottom 2 that takes into account the effective height of the resonance vibration amplitudes of the flat springs 4.
  • the cross bars 3 thus serve to support and guide the flat springs 4. These are designed essentially in a zigzag shape, in the case of this example the two leg ends of the spring wire directed towards one another being brought into each other by a connecting cross section.
  • the cross section can also be arcuate, provided that a more or less sharp kinking of the legs is not preferred to one another.
  • the sieve frame 1 is set by a circular or elliptical oscillation drive into the required oscillation movement 6 directed in the vertical plane to the drive, which in turn excite the flat springs 4 to the resonance oscillation 7.
  • the flat springs 4 are shorter than the cross bars 3 carrying them, so that, according to the difference between the light dimension between the frame parts of the screen frame 1 connected by cross bars 3 and the length of the flat springs 4, there is a traveling distance 8, over the length of which the flat springs 4 are driven Move the screening machine back and forth.
  • the cross bars 3 have a diameter of 10 mm and are at a distance of 36 mm arranged to each other (commercial drawn round steel).
  • the dimensioning information mentioned in this example is only a suggestion.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP83100575A 1982-01-27 1983-01-22 Siebverfahren und Vorrichtung zur Ausübung Expired EP0084878B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83100575T ATE41888T1 (de) 1982-01-27 1983-01-22 Siebverfahren und vorrichtung zur ausuebung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3202528 1982-01-27
DE19823202528 DE3202528A1 (de) 1982-01-27 1982-01-27 Siebverfahren und vorrichtung zur ausuebung

Publications (3)

Publication Number Publication Date
EP0084878A2 EP0084878A2 (de) 1983-08-03
EP0084878A3 EP0084878A3 (en) 1986-03-26
EP0084878B1 true EP0084878B1 (de) 1989-04-05

Family

ID=6154004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100575A Expired EP0084878B1 (de) 1982-01-27 1983-01-22 Siebverfahren und Vorrichtung zur Ausübung

Country Status (3)

Country Link
EP (1) EP0084878B1 (enrdf_load_stackoverflow)
AT (1) ATE41888T1 (enrdf_load_stackoverflow)
DE (1) DE3202528A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113058361B (zh) * 2021-04-08 2022-06-17 杭州意能电力技术有限公司 变频式高强气流声源及其使用方法
CN113289887A (zh) * 2021-07-06 2021-08-24 西南石油大学 一种反共振高效隔振直线振动筛

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR427986A (fr) * 1911-03-31 1911-08-19 Societe Daverio Henrici & Cie S A Batteur pour tamis à secousses
US2617533A (en) * 1948-12-17 1952-11-11 Lehman Vibrating equipment
US3070230A (en) * 1958-12-12 1962-12-25 Lottie J Peterson Apparatus for separating materials
US3565251A (en) * 1968-12-30 1971-02-23 Blaw Knox Co Plastic internal screen
DE2609683A1 (de) * 1976-03-09 1977-09-15 Juergen Hoffmann Sieb
US4122006A (en) * 1977-09-28 1978-10-24 Black Clawson, Inc. Screening apparatus

Also Published As

Publication number Publication date
EP0084878A2 (de) 1983-08-03
EP0084878A3 (en) 1986-03-26
DE3202528A1 (de) 1983-08-04
DE3202528C2 (enrdf_load_stackoverflow) 1990-09-20
ATE41888T1 (de) 1989-04-15

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