EP0084878A2 - Procédé de tamisage et dispositif de mise en oeuvre - Google Patents

Procédé de tamisage et dispositif de mise en oeuvre Download PDF

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Publication number
EP0084878A2
EP0084878A2 EP83100575A EP83100575A EP0084878A2 EP 0084878 A2 EP0084878 A2 EP 0084878A2 EP 83100575 A EP83100575 A EP 83100575A EP 83100575 A EP83100575 A EP 83100575A EP 0084878 A2 EP0084878 A2 EP 0084878A2
Authority
EP
European Patent Office
Prior art keywords
sieve
flat springs
vibrations
springs
flat
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.)
Granted
Application number
EP83100575A
Other languages
German (de)
English (en)
Other versions
EP0084878B1 (fr
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/fr
Publication of EP0084878A3 publication Critical patent/EP0084878A3/de
Application granted granted Critical
Publication of EP0084878B1 publication Critical patent/EP0084878B1/fr
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.
  • the invention therefore relates to vibrating sieves in which the sieve frame and sieve jointly carry out similar vibrations, wherein essentially fish-vibrating sieves with drive by mass force or sieves with a limited stroke with crank or eccentric drive are addressed.
  • 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 swings 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 e.g. LUEGER, volume 49, page 583).
  • the vibrating basic system i.e. the sieve box
  • can therefore also other oscillating systems i.e. 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 absorbs the energy required to compensate for its own damping, i.e. a more or less large part of the energy imparted to the basic system is absorbed by the resonator.
  • the sieve plate or the sieve fabric they are referred to uniformly as sieve plate in this consideration - even if there is no real training i.S. of the terminus technicus "resonance sieve", vibrating sieves are stimulated by the basic system to generate additional resonance vibrations, the amplitude of which decreases towards the clamping points of the floor in the sieve box, i.e. that the sieve tray becomes a resonator in these cases.
  • This code number has a lower limit of up to approximately 1.6.
  • Kv values 3 to 3.5 are generally to be used.
  • restrictive conditions apply to moist or sticky, i.e. fine material exhibiting strong surface forces.
  • one helps here by heating the sieve covering and evaporation of the water, the sieve generally being used as electrical resistance.
  • 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 vibration plane and perpendicular to the direction of the sieve material overflow and lying on supports fixed in the sieve box stimulate resonance vibrations, the effective amplitudes of which are directed essentially one-sided towards the sieve bottom , and that the flat springs move horizontally back and forth in addition to their vertically directed movement within a predetermined traveling distance.
  • 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.
  • any other shaped turn deflection e.g. a pointed one is practical and possible.
  • this design results in the avoidance of plug-in grain and, viewed overall, practically the maintenance of the active starting surface, ie a smaller sieve size is possible with the same output or a greater output is possible if the sieve size is maintained.
  • the surface load is lower compared to the previous cleaning devices (eg tapping devices).
  • the sieve bottom 2 forming the sieve plane is arranged in the usual manner under tension.
  • 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, unless a more or less sharp kinking of the legs is preferred to each other.
  • 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 arranged at a distance of 36 mm from one another (commercially 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 Procédé de tamisage et dispositif de mise en oeuvre Expired EP0084878B1 (fr)

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 true EP0084878A2 (fr) 1983-08-03
EP0084878A3 EP0084878A3 (en) 1986-03-26
EP0084878B1 EP0084878B1 (fr) 1989-04-05

Family

ID=6154004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100575A Expired EP0084878B1 (fr) 1982-01-27 1983-01-22 Procédé de tamisage et dispositif de mise en oeuvre

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113058361A (zh) * 2021-04-08 2021-07-02 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113058361A (zh) * 2021-04-08 2021-07-02 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
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

Also Published As

Publication number Publication date
DE3202528C2 (fr) 1990-09-20
EP0084878B1 (fr) 1989-04-05
ATE41888T1 (de) 1989-04-15
DE3202528A1 (de) 1983-08-04
EP0084878A3 (en) 1986-03-26

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