EP0246617B1 - Appareil pour impulsions d'air évitant la formation de voûtes dans les silos pour matières en vrac - Google Patents

Appareil pour impulsions d'air évitant la formation de voûtes dans les silos pour matières en vrac Download PDF

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Publication number
EP0246617B1
EP0246617B1 EP87107276A EP87107276A EP0246617B1 EP 0246617 B1 EP0246617 B1 EP 0246617B1 EP 87107276 A EP87107276 A EP 87107276A EP 87107276 A EP87107276 A EP 87107276A EP 0246617 B1 EP0246617 B1 EP 0246617B1
Authority
EP
European Patent Office
Prior art keywords
compressed air
container
quick release
valve
overflow valve
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
EP87107276A
Other languages
German (de)
English (en)
Other versions
EP0246617A3 (en
EP0246617A2 (fr
Inventor
Udo Leibling
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.)
Agrichema Materialflusstechnik GmbH
Original Assignee
Agrichema Materialflusstechnik 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 Agrichema Materialflusstechnik GmbH filed Critical Agrichema Materialflusstechnik GmbH
Priority to AT87107276T priority Critical patent/ATE47114T1/de
Publication of EP0246617A2 publication Critical patent/EP0246617A2/fr
Publication of EP0246617A3 publication Critical patent/EP0246617A3/de
Application granted granted Critical
Publication of EP0246617B1 publication Critical patent/EP0246617B1/fr
Expired legal-status Critical Current

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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
    • B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
    • B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container

Definitions

  • the invention relates to an air blast device according to the preamble of claim 1.
  • Air blast devices are used to generate strong air blasts in order to remove material build-up and material compression in storage silos for bulk goods and thus to solve flow problems.
  • Conventional air blast devices (DE-OS 32 23 406) contain a pressure vessel and a discharge nozzle immersed in the latter, the outlet opening of which can be closed against the interior of the inner vessel by a valve closing body.
  • the valve closing body itself is guided in a tube between an open and a closed position.
  • In this pipe opens a line that connects the pressure vessel with an external pressure accumulator.
  • a multi-way valve usually a three-way, two-way valve, is arranged in this line in front of the pressure vessel. This ensures the flow of compressed air between the accumulator to the pressure vessel in one position and provides ventilation in the other position in order to cause the piston to snap back away from the outlet opening of the outlet port, so that the accumulated in the pressure vessel through the then open outlet port Compressed air can escape suddenly.
  • the piston is preloaded by a compression spring accommodated in the tube, so that it rests under spring force at the outlet opening of the outlet connection.
  • a compression spring accommodated in the tube, so that it rests under spring force at the outlet opening of the outlet connection.
  • Such a construction is particularly disadvantageous when a reliable mode of operation of the air blast device is desired over a larger operating range, for example for a pressure range from 4 to 10 bar.
  • air blast devices are often used in large numbers side by side on one and the same storage silo and are fired one after the other at short time intervals (fast cycle times). With a correspondingly high number of air blast devices in accordance with the size of the clock sequence, this can lead to an excessive load on the central external memory, so that there is a pressure drop in the last devices in the clock sequence due to the overloading of the memory.
  • the pressure vessel would not be brought up to the full operating pressure, so that when the air blast device was fired no perfect operation would be guaranteed.
  • the piston when compressed air flows into the pressure vessel, if the pressure in the external pressure accumulator drops due to operation, the piston would not be pressed sufficiently against its closing seat on the outlet port.
  • the operation of an air blast device with low operating pressure carries the risk that if the air blast presses against a very hard material build-up in the storage silo, the air can blow back into the device. With a device with a piston return spring, this cannot be prevented at high pressures.
  • the compression spring as a mechanical wear part is placed unfavorably, namely within the air blast device, so that any replacement of a worn spring leads to a corresponding maintenance effort, the air blast device not being able to be used during the maintenance period.
  • the object of the invention is to ensure a flawless and reliable mode of operation of an air blast device even over a wide pressure range.
  • a branch line leads from the connection line leading to the pressure accumulator to the pressure vessel, in which an overflow valve is arranged, the interior of the pressure vessel can only be filled when the pressure in the connecting line exceeds the blocking value specified by the overflow valve.
  • a blow back of the air blast into the device when the air blast hits very hard material build-up is thus excluded, as well as a escape of compressed air from the pressure container before the container is filled. This is particularly advantageous if several air blast devices are actuated in quick succession, ie with a high cycle sequence.
  • the invention ensures that, regardless of the number of air blast devices, all pistons are always at least at an operating pressure of e.g. 4 bar and thus an optimal closing pressure is generated due to the different surfaces on the top and bottom of the piston.
  • the operating compressed air network has an operating pressure of more than e.g. 4 bar, the compressed air tanks can be filled at the same time, otherwise all pistons are closed with the optimal closing pressure and the tanks only fill when the operating pressure of 4 bar is exceeded again.
  • Another advantage of the invention is that, if necessary, only the pistons are supplied with the operating pressure, while the air supply to the pressure vessel either by pneumatic or electromagnetic valves are closed or a pressure reducer is arranged in front of the overflow valve and adjusted so that the pressure required for the overflow valve to function is not exceeded.
  • the overflow valve is designed to be adjustable. This allows any pressure blocking values to be set on the overflow valve. Since the overflow valve is located outside the pressure vessel, this setting can be made quickly and easily without interruption of the operation of the air blast device.
  • the overflow valve can work as a check valve at the same time, or a check valve is expediently additionally used.
  • Another advantage is the measure that the compressed air supply line is connected to the connecting line via a T-piece, which enables simple retrofitting of existing air blast devices.
  • the connecting line, the compressed air supply line and the overflow valve are formed in a single pipe socket which can be screwed onto the pressure vessel.
  • the air blast device essentially comprises a pressure vessel 1 and a blow-out nozzle 2 which plunges into it and which, according to FIG. 1, is closed off from the interior of the pressure vessel 1 by a valve-closure member designed as a piston 3.
  • the piston 3 is guided in a tube 4, which is connected via a connecting line 5 to an external compressed air reservoir designated 6.
  • suitable means such as piston rings and the like.
  • a multi-way valve 7, here a three-way two-way valve, is arranged in front of the pressure vessel 1, which enables the flow of compressed air from the compressed air reservoir 6 to the pressure vessel 1 in one position and provides ventilation in the other position, through which the sudden return movement of the Piston and thus the generation of the air blast is triggered. Since such air blast devices are generally known, the structure and mode of operation are only briefly described above and the structure is only shown schematically in the drawings.
  • a branch line designated 8 which opens into the pressure vessel 1.
  • an overflow valve 9 is arranged, which is expediently designed to be adjustable.
  • a check valve arranged between the overflow valve 9 and the pressure vessel is not shown.
  • the multi-way valve 7 is in the flow position, so that compressed air flows from the reservoir 6 via the connecting line 5 directly to the pipe 4, as indicated by the arrow in Fig. 1, and thereby the piston 3 against Immersion end of the outlet 2 is pressed.
  • the overflow valve 9 is set to a pressure value of 4 bar. As soon as the compressed air flowing from the reservoir 6 reaches 4 bar, the compressed air can now flow via the overflow valve 9 and the branch line 8 into the interior 10 of the pressure container 1, which thereby fills with compressed air of 4 bar.
  • the multi-way valve 7 is switched over to the venting position in the known manner.
  • the compressed air contained in the interior 10 of the pressure vessel 1 is effective on the underside of the piston, so that the latter is pressed upward toward the inflow opening of the connecting line 5.
  • the outlet 12a of the pressure vessel 1 is opened, so that the compressed air in the pressure vessel 1 can suddenly come out through the blow-out nozzle 2 in the manner of an air blast corresponding to the direction of the arrow in FIG. 2.
  • the branch line 8 is expediently connected to the connecting line 5 via a T-insert 11, which is previously inserted into the connecting line 5.
  • An overpressure diaphragm valve is particularly suitable as the overflow valve.
  • the connecting line 5, the branch line 8 and the overflow valve 9 are arranged or formed in one component, namely a pipe socket designated 12, which can be screwed onto the pressure vessel 1 via a screw thread 13.
  • the branch line 8 which leads to the pressure vessel 1.
  • the overflow valve 9 is arranged in the branch line 8.
  • the closing member of this overflow valve 9 is formed by a ball 15 which is biased by a spring 16 into its closed position according to FIG. 3.
  • the overflow valve 9 is accessible via a lateral bore 17 which can be closed by a screw cap 19.
  • a further line 20 is formed in the pipe socket 12, but does not open into the connecting line 5.
  • This additional line 20 can be used as a further connection line, for example to indicate the internal pressure of the container on a manometer screwed onto the connection line 20.
  • the embodiment according to FIG. 4 is similar to the embodiment according to FIG. 3, as the connecting line 5, the branch line 8 and the overflow valve 9 are also accommodated in a pipe socket 12 there.
  • a further line 29 can optionally also be accommodated in the pipe socket 12 according to FIG. 4.
  • the valve closing member is disc-shaped and biased in its closed position by a spring 16.
  • the installation of the overflow valve 9 takes place via a pipe socket 21 which is attached laterally to the pipe socket 12 and can be closed by means of a screw cap (not shown).
  • the embodiment according to FIG. 3 offers the advantage over the embodiment according to FIG. 4 that it is a turned part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Air Transport Of Granular Materials (AREA)

Claims (6)

1. Appareil à impulsions d'air pour éviter la formation en mase dans des silos de stockage de matière en vrac grâce à des impulsions d'air, comportant un réservoir (1) raccordé à un stockage d'air comprimé (6) par une conduite de raccord (5), et qui peut, à travers une valve multivoies (7) être rempli d'air comprimé provenant du stockage d'air comprimé (6), comprenant une tubulure de soufflage (2), et un corps (3) de fermeture de valve en forme de piston, guidé de façon étanche, et mobile en va-et-vient, par application d'air comprimé, entre une position ouverte et une position fermée de façon étanche, corps qui, dans sa position fermée ferme la tubulure de soufflage (2) à l'intérieur du réservoir sous pression (1), caractérisé en ce qu'une conduite (8) d'amenée d'air comprimé, qui débouche dans le réservoir sous pression (1) et dans laquelle est disposée une soupape de décharge (9), bifurque de la ligne de raccordement (5) entre la valve multi-voies (7) et le réservoir sous pression (1).
2. Appareil à impulsions d'air selon la revendication 1, caractérisé en ce que la soupape de décharge (9) est de structure réglable.
3. Appareil à impulsions d'air selon la revendication 1 ou 2, caractérisé en ce que la conduite (8) d'amenée d'air comprimé est raccordée à la conduite de raccord (5) par un raccord en T (11 ).
4. Appareil à impulsions d'air selon la revendication 1 ou 2, caractérisé en ce que la conduite de raccordement (5), la conduite (8) d'amenée d'air comprimé, ainsi que la soupape de décharge (9) sont disposées dans un manchon tubulaire (12).
5. Dispositif à impulsions d'air selon la revendication 4, caractérisé en ce que la manchon tubulaire (12) peut être vissé sur le réservoir sous pression (1).
6. Appareil à impulsion d'air selon l'une des revendications précédentes, caractérisé en ce que la soupape de décharge (9) est constituée d'un élément de fermeture de préférence sphérique, qui est préalablement sollicité par un ressort à compression (16) dans sa position de fermeture à l'intérieur de la ligne de bifurcation (8).
EP87107276A 1986-05-21 1987-05-19 Appareil pour impulsions d'air évitant la formation de voûtes dans les silos pour matières en vrac Expired EP0246617B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87107276T ATE47114T1 (de) 1986-05-21 1987-05-19 Luftstossgeraet zur aufloesung von materialsaufstauungen in lagersilos fuer schuettgut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616990A DE3616990C1 (de) 1986-05-21 1986-05-21 Luftstossgeraet zur Aufloesung von Materialaufstauungen in Lagersilos fuer Schuettgut
DE3616990 1986-05-21

Publications (3)

Publication Number Publication Date
EP0246617A2 EP0246617A2 (fr) 1987-11-25
EP0246617A3 EP0246617A3 (en) 1988-08-03
EP0246617B1 true EP0246617B1 (fr) 1989-10-11

Family

ID=6301244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107276A Expired EP0246617B1 (fr) 1986-05-21 1987-05-19 Appareil pour impulsions d'air évitant la formation de voûtes dans les silos pour matières en vrac

Country Status (3)

Country Link
EP (1) EP0246617B1 (fr)
AT (1) ATE47114T1 (fr)
DE (2) DE3616990C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742489C2 (de) * 1987-12-15 1998-04-09 Agrichema Materialflusstechnik Luftstoßgerät
DE19743789B4 (de) * 1997-10-02 2005-10-06 Agrichema Materialflusstechnik Gmbh & Co. Kg Vorrichtung zum stoßartigen Ausblasen von Druckluft zur Beseitigung von Materialanbackungen von Schüttgütern in Reaktionsbehältern
ITBG20010037A1 (it) * 2001-10-19 2003-04-19 Larix Srl Valvola di sparo o scarico istantaneo di grande portate di aereiformi, per fluidificazione di materiali granulari e/o polverulenti.
DE20316754U1 (de) * 2003-10-31 2003-12-24 Agrilux Beteiligungs Gmbh Luftstoßgerät mit innenliegender, oben angeordneter Ventileinheit
US7837062B2 (en) 2006-03-10 2010-11-23 Martin Engineering Company Air cannon for removal of flowable material from a material handling system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB887309A (en) * 1959-08-05 1962-01-17 Simon Ltd Henry Improved method of and apparatus for the conveying of powdered or pulverulent dry material in bulk
DE2000808C3 (de) * 1970-01-09 1975-08-07 Syrjanowskij Swinzowij Kombinat, Syrjanowsk (Sowjetunion) Vorrichtung zur Verbesserung des Auslasses von Schüttgut aus einem Schüttgutbehälter
DE3223406C2 (de) * 1982-06-23 1985-10-31 VSR Engineering GmbH Fördertechnik, 4330 Mülheim Blasvorrichtung zum Beseitigen von Aufstauungen in Lagersilos für Schüttgut durch Luftstöße

Also Published As

Publication number Publication date
DE3760730D1 (en) 1989-11-16
EP0246617A3 (en) 1988-08-03
EP0246617A2 (fr) 1987-11-25
DE3616990C1 (de) 1987-12-17
ATE47114T1 (de) 1989-10-15

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