DE1907444A1 - Prevention and destruction of silodomes by means of sound - Google Patents

Prevention and destruction of silodomes by means of sound

Info

Publication number
DE1907444A1
DE1907444A1 DE19691907444 DE1907444A DE1907444A1 DE 1907444 A1 DE1907444 A1 DE 1907444A1 DE 19691907444 DE19691907444 DE 19691907444 DE 1907444 A DE1907444 A DE 1907444A DE 1907444 A1 DE1907444 A1 DE 1907444A1
Authority
DE
Germany
Prior art keywords
dome
cavity
sound
frequency
resonance frequencies
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.)
Pending
Application number
DE19691907444
Other languages
German (de)
Inventor
Robert Massen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19691907444 priority Critical patent/DE1907444A1/en
Publication of DE1907444A1 publication Critical patent/DE1907444A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/66—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices
    • B65D88/665—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices using a resonator, e.g. supersonic generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)

Description

Verhindern und Zerstören von Silodomen mittels Schall.Prevention and destruction of silodomes by means of sound.

Die Erfindung betrifft die Anwendung energiereicher Schallwellen zum Verhindern der Dombildung bei Silos und Vorratsbehälter bzw. zur Zerstörung von bereits entstandenen Domen.The invention relates to the use of high-energy sound waves for Prevents the formation of domes in silos and storage containers or the destruction of domes already created.

Beim Bau von Silos ist eins der hartnäckigsten Probleme die Dombildung; d.h. das Püllgut fließt nicht mehr kontinuierlich ab, sondern es bildet sich oberhalb der Ablassöffnung ein hohlraum mit meist kuppelförmiger Decke. Diese Kuppel kann durch das Gewicht des daraufliegenden Füllgutes so sehr verfestigt werden, daß man zu Sprengungen greifen muß. Man bemüht sich, besonders bei leichtem Füllgut, durch ständiges vibrieren lassen der ganzen Silowandung oder durch Einbringen eines Rüttlers die Dombildung zu verhindern. Bei schwerem Füllgut, z.B. Erzen, wird diese Methode kompliziert und aufwendig.When building silos, one of the most persistent problems is dome formation; i.e. the items to be cleaned no longer flow off continuously, but form above the outlet opening is a cavity with a mostly dome-shaped ceiling. This dome can be so much solidified by the weight of the product lying on it that one must resort to explosions. Efforts are made, especially with light contents constant vibrating of the whole silo wall or by introducing a vibrator to prevent the formation of a dome. This method is used for heavy goods, e.g. ores complicated and time-consuming.

Das verhindern einer Dombildung bzw. die Zerstörung eines Domes wird erfindungsgemäß dadurch gelöst, daß man an der Austrittsöffnung des Silos ständig oder zeitweise Frequenzmodulierten Schall- bzw. Infraschall hoher Intensität aua einem gewobbelten Schaligenerator großer Leistung ( z.B.This will prevent the formation of a dome or the destruction of a dome solved according to the invention in that one is constantly at the outlet opening of the silo or intermittently frequency-modulated sound or infrasound of high intensity aua a swept shell generator of great power (e.g.

Pfeife oder Sirene; siehe dazu auch ( 1 )) zuführt. Fängt nun ein IIohlraum an sich auszubilden so trifft der gewobbolte Schallgenerator periodisch mit Sicherheit eine ( oder auch mehrere ) Resonanzfrequenzen dieses hohlraums. Dadurch gerät dieser in Eigenschwingungen und dabei werden so groBe Kräfte auf die Kuppel in vertikaler Richtung ( die schwache Richtung einer Kuppel ) übertragen, daß diese zusammenbricht.Whistle or siren; see also (1)). Now catches To form a cavity per se, the wobbled sound generator hits periodically certainly one (or more) resonance frequencies of this cavity. Through this If this gets into natural oscillation and in doing so, great forces are exerted on the dome in the vertical direction (the weak direction of a dome) transmit that this collapses.

Führt man beständig Schall zu, so kann man dem Auftreten eines Domes von seinen Anfängen an, wenn die Domkuppel sioh noch nicht gefestigt hat, wehren.If you constantly add sound, you can see the appearance of a dome from its beginnings, if the dome has not yet strengthened, defend it.

Eine andere Methode besteht darin, das Auftreten eines Domes abzuwarten, durcn einbringen eines Ifikrofons und Schallgebers ( Tieftonlautsprecher ) die Resonanzfrequenzen dieses Hohlraumes auszumessen, den Leistungsschallgenerator auf eine dominierende Resonanzfrequenz einzustellen und durch Anregen des Hohlraumes zu Eigenschwingungen den Dom zu zerstören.Another method is to wait for a dome to appear, the resonance frequencies by inserting a microphone and sounder (woofer) Measure this cavity, the power sound generator on a dominant Adjust the resonance frequency and by exciting the cavity to natural vibrations to destroy the cathedral.

Zur Vermeidung von Hörbelästigung des Arbeitsperaonals empfie» sich die Verwendung von Infraschall. Der Frequenzbereich des Leistungsgenerators richtet sich-dabei nach der durchschnittlichen Größe der auftretenden Dome. Die Verwendung von Infraschall bietet weiterhin den Vorteil, daß der Bau von sehr leistungsstarken Infraschallgeneratoren relativ einfach ist. ( siehe ( 1 ) ).In order to avoid annoyance to the hearing of the work staff, »is recommended the use of infrasound. The frequency range of the power generator is set up depending on the average size of the domes occurring. The usage Infrasound also offers the advantage that the construction of very powerful Infrasound generators is relatively simple. (see (1)).

(1 ) Literatur: Diplomarbeit vom 3.Februar 1969, cand. ing-.(1) Literature: Diploma thesis from February 3, 1969, cand. Ing-.

Robert Massen " erzeugung und Detektion von Infraschall am Institut für elektrische Nachrichtentechnik, Prof. Robert Massen "Generation and detection of infrasound at the institute for electrical communications engineering, Prof.

Aschoff, Rheinisch-Westfälische Technische Hochschule Aachen. Aschoff, RWTH Aachen University.

Claims (2)

P A T E N T A N S P R Ü C H E P A T E N T A N S P R Ü C H E ilos und Vorratsbehälter, dadurch gekennzeichnet, daß durch ständiges Zuführen von frequenzmoduliertem Schall, besonders Infrasenall großer Leistung aus einem gewobbelten Generator der entstehende Hohlraum periodisch Eigenschwing ungen angeregt wird und durch die damit .bertragenen großen Kräfte auf die konkave Seite des entstehenden Domes eine Dombildung verhindert wird bzw. ein sich bereits ausgebildeter Don zerstört wird.ilos and storage container, characterized in that by constant Supply of frequency-modulated sound, especially high power infrared a swept generator the resulting cavity periodically natural vibrations is excited and due to the large forces transmitted with it to the concave side of the emerging dome a dome formation is prevented or an already formed one Don is destroyed. 2) Silos und Vorratsbehälter nach 1) dadurch gekennzeichnet, daß bei Ausbildung eines Domes die tiefen Resonanz -frequenzen des entstandenen Hohlraums gemessen werden und dann Schall, besonders Infraschalllhoher Leistung mit der Frequenz einer der dominierenden Hohlraumresonanzfrequenzen zugeführt wird. Durch die bei den Eigensctlwingungen des Hohlraumes entstehenden Wandkrafte wird der Dom nach der unter 1) beschriebenen Weise zerstört. 2) silos and storage containers according to 1), characterized in that when a dome is formed, the low resonance frequencies of the cavity created be measured and then sound, especially infrasound high power with the frequency one of the dominant cavity resonance frequencies is supplied. Through the at The dome follows the internal vibrations of the cavity destroyed in the manner described under 1).
DE19691907444 1969-02-14 1969-02-14 Prevention and destruction of silodomes by means of sound Pending DE1907444A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691907444 DE1907444A1 (en) 1969-02-14 1969-02-14 Prevention and destruction of silodomes by means of sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691907444 DE1907444A1 (en) 1969-02-14 1969-02-14 Prevention and destruction of silodomes by means of sound

Publications (1)

Publication Number Publication Date
DE1907444A1 true DE1907444A1 (en) 1970-09-03

Family

ID=5725270

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691907444 Pending DE1907444A1 (en) 1969-02-14 1969-02-14 Prevention and destruction of silodomes by means of sound

Country Status (1)

Country Link
DE (1) DE1907444A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3029615A1 (en) * 1980-08-05 1982-03-04 Michael Matthew Lakewood N.J. Mokris Storage vessel material flow activator - comprises gas injector providing multiple instantaneous energy bursts
EP1535349A2 (en) * 2002-06-27 2005-06-01 Oriel Therapeutics, Inc. Apparatus, systems and related methods for processing, dispensing and/or evaluating non-pharmaceutical dry powders
WO2020088717A1 (en) * 2018-11-04 2020-05-07 systeco GmbH Surface cleaning and engraving machine using vacuum blasting
RU2807490C2 (en) * 2018-11-04 2023-11-15 Систеко Гмбх Machine for cleaning and engraving surfaces by jet-vacuum method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3029615A1 (en) * 1980-08-05 1982-03-04 Michael Matthew Lakewood N.J. Mokris Storage vessel material flow activator - comprises gas injector providing multiple instantaneous energy bursts
EP1535349A2 (en) * 2002-06-27 2005-06-01 Oriel Therapeutics, Inc. Apparatus, systems and related methods for processing, dispensing and/or evaluating non-pharmaceutical dry powders
EP1535349A4 (en) * 2002-06-27 2009-11-11 Oriel Therapeutics Inc Apparatus, systems and related methods for processing, dispensing and/or evaluating non-pharmaceutical dry powders
WO2020088717A1 (en) * 2018-11-04 2020-05-07 systeco GmbH Surface cleaning and engraving machine using vacuum blasting
RU2807490C2 (en) * 2018-11-04 2023-11-15 Систеко Гмбх Machine for cleaning and engraving surfaces by jet-vacuum method

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