EP0423572B1 - Dispositif pour la production d'une onde de pression - Google Patents

Dispositif pour la production d'une onde de pression Download PDF

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Publication number
EP0423572B1
EP0423572B1 EP90119210A EP90119210A EP0423572B1 EP 0423572 B1 EP0423572 B1 EP 0423572B1 EP 90119210 A EP90119210 A EP 90119210A EP 90119210 A EP90119210 A EP 90119210A EP 0423572 B1 EP0423572 B1 EP 0423572B1
Authority
EP
European Patent Office
Prior art keywords
valve disc
pipe
pressure chamber
pressure
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 - Lifetime
Application number
EP90119210A
Other languages
German (de)
English (en)
Other versions
EP0423572A1 (fr
Inventor
Hans-Otto Schwarze
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.)
HOSCH-COMPANY
Original Assignee
HOSCH-COMPANY
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Filing date
Publication date
Application filed by HOSCH-COMPANY filed Critical HOSCH-COMPANY
Publication of EP0423572A1 publication Critical patent/EP0423572A1/fr
Application granted granted Critical
Publication of EP0423572B1 publication Critical patent/EP0423572B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D88/706—Aerating means, e.g. one-way check valves

Definitions

  • the invention relates to a device for intermittent generation of a pressure wave in silos or other containers, in which a tube for releasing the pressure waves, a storage housing surrounding the tube for the accumulation of compressed air and a flat sealing element are present, which are in the charged, idle state at the inner end of the Tube is present, on the side facing away from the tube a pressure chamber, on one side with the internal pressure of the pressure chamber and on the other side outside of the tube with the pressure of the accumulator housing and in the event of tripping by venting the pressure chamber to establish a connection between the accumulator housing and the tube lifts off from the pipe end, the storage housing being fillable via a passage which encloses the pressure chamber.
  • a device of this type in which a valve plate can be moved within a connecting piece, which alternately seals the tube for releasing the pressure waves or the outlet of the pressure chamber.
  • a separate channel for filling the storage housing which is operated using a separate valve.
  • such a device is known from the French company Ermap, in which, instead of the washer sealingly guided in a pipe socket, a membrane is clamped above the valve-side pipe end, which closes off the pressure chamber.
  • the membrane has a calibrated bore outside the surface of the pipe for releasing the pressure waves. Filling takes place via the pressure chamber using the same opening through which the pressure chamber is also vented.
  • the flat sealing element is a non-clamped valve disc, the edge of which is elastic enough on the one hand to let the compressed air from the pressure chamber into the storage housing during filling, and on the other hand is rigid enough to at least the valve disc center roughly, the pressure chamber at least partially overlaps the edge section of the valve disk and the valve disk tends to stiffen in its central section.
  • a piston seal is presented on a device of the same type, which is designed to be air-permeable in one direction, but sealing in the other direction. This requires the use of simple sealing sleeves, which inherently have this property due to their U-shaped cross section and without exception exhibit.
  • valve disc is designed in coordination with the pressure chamber, in such a way that, when it is filled, it leaves the compressed air let into the pressure chamber into the storage housing without any significant resistance, but on the other hand seals it so well against the pressure chamber that it seals in the case of venting the pressure chamber after a filling process, the inner opening of the tube for releasing the pressure waves is safely released.
  • An axially displaceable and non-clamped valve disc in the form of a flat sealing element is already known as a blocking element of a check valve (CH-A-558 492).
  • a valve disc with the central part of which can block the opening of the axial flow channel of a nozzle by pressing the central part of the valve disc against the opening edge of the nozzle and after reversing the direction of flow of the medium the flow through it can be achieved by opening the opening.
  • the valve disk is moved axially until it rests against a spring washer, and the medium can flow past the valve disk because the valve disk has a smaller diameter than the surrounding housing and thus an annular flow channel is formed between the valve disk and the inner wall of the housing becomes.
  • the flow channel of the nozzle is closed by the valve disc, there is no flow around the valve disc, as is necessary for the device according to the invention for filling the accumulator.
  • no comparable flow of the medium occurs in the known non-return valve, as occurs in the device according to the invention, when the compressed air suddenly flows out of the accumulator past the underside of the valve disc through the inner opening of the tube to the outside to generate a pressure wave.
  • the edge of the valve disk must be elastically deformable in the device according to the invention.
  • valve disc an extremely soft material quality can be selected for the outer edge of the valve disc, which may have some ripple in the untensioned state.
  • stiffness must have a certain minimum size so that the valve disc remains somewhat centered in the device, since the valve disc is preferably unguided except through the pressure chamber edge or the inner wall of the storage housing. If a very elastic quality is selected for the valve disc for cost reasons or for reasons of the particularly low masses, it may be expedient to reinforce the valve disc with a support disc which is arranged, for example, on the side of the valve disc facing away from the pipe end or as a core insert in the Valve disc is inserted.
  • the device can be charged for a triggering event in a few seconds because the filling is not hindered by a restriction or the like at any point. Due to the quick fillability, the number of devices required for emptying a silo can often be reduced. A prerequisite is, of course, a correspondingly generous air flow for quick filling of the device.
  • valve disk only has to be held approximately in its position in order to keep it essentially centered. This simplifies the production even further, because blanks punched out of meter goods can be used as valve disks.
  • a very precise central assignment of the pressure chamber to the pipe is not necessary, since this is not important. Even without a central position, there is the desired sealing at the respective points, so that again extremely low requirements must be placed on the precision of the device. This makes the manufacture cheaper.
  • valve disc must be stiff enough to be able to withstand the differential pressure between the pressure chamber and the pipe in the charged idle state without any significant deformation.
  • the valve disk is provided with a reinforcement in its middle section, which should be light-weight for reasons of low inertia.
  • the valve disc then acts as a pure seal, which provides a seal between the support disc and the inner tube end when the device is loaded.
  • the support disk is attached to the valve disk with a central rivet.
  • the support disc consists, for example, of a circular aluminum plate.
  • valve disk from a thin, flexible metal disk, the sealing then being effected by a temperature-resistant ring made of plastic, cork or even aluminum, which is fastened to the metal plate and points towards the inner end of the tube.
  • FIG. 1 of a device consists of a tubular storage housing 1, which is closed at both ends with a lower cover 2 and an upper cover 3 with the aid of conventional screw connections.
  • a tube 5 is welded into the lower cover 2, while there is an opening 4 in the upper cover 3. It is used to hold a valve or a line, at the end of which there is a valve, with the help of which filling with compressed air or quick ventilation is possible at this point.
  • the tube 5 is used for releasing pressure waves, which in turn are used to loosen free-flowing material in silos or other containers which tend to form bridges, stick or are difficult to free-flow for other reasons.
  • a pressure chamber 7 is formed below the upper cover 3 with the aid of a pressure chamber housing 6 and is closed on its lower side by means of a valve disk 10.
  • the wall 8 of the pressure chamber 7 is smooth with no jagged transitions because it serves as a support surface for the valve disc 10 when pressure waves are emitted.
  • the exemplary embodiments shown in the figures of the drawing are present in single or multiple numbers at predetermined locations on funnels or on the inner wall of storage containers or silos and can emit a violent pressure jet in the form of a pressure wave, which has a dissolving effect on free-flowing bulk material.
  • Compressed air is admitted into the pressure chamber 7 via the valve already mentioned, which presses the slightly elastic valve disk 10 at the contact point with the pressure chamber housing 6 to release a passage gap.
  • the storage housing 1 fills with compressed air, the valve disc 10 being pressed onto the inner end of the tube 5 in a sealing manner with increasing force due to the lack of counterpressure within the tube 5.
  • valve disk 10 After filling, the valve disk 10 returns to the starting position shown, in which its edge lies more or less loosely on the pressure chamber housing 6. At this contact point, there may even be residual gaps or small openings; the only thing that matters is that there are no openings that are too large in the contact zone.
  • the area of the annular gap "s" should be chosen so that it corresponds approximately to the cross-sectional area of the tube 5. As a result, there is virtually no traffic jam at this point, which is conducive to rapid emptying of the storage housing 1 through the pipe 5.
  • the light weight of the valve disc 10 ensures a particularly sudden release of the inner end of the tube 5 when triggered, which leads to excellent results.
  • the pressure wave leaving the device is very strong, on the other hand, the range is considerable.
  • the storage housing 1, the tube 5 and the valve disk 10 are circular and are arranged concentrically to one another.
  • Rectangular or square shapes are also possible if appropriate installation conditions or the like call for these shapes.
  • the valve disc 10 is subjected to practically no stresses, if one disregards the pressure on the end of the tube in the loaded idle state and the slight deflection during emptying of the storage housing 1.
  • Cheapest materials and simplest designs can therefore be preferred so that result in favorable manufacturing costs.
  • the valve disk 10 is provided on its side facing the pressure chamber 7 with a support disk 11 which is fastened with the aid of a clip 20.
  • a bulbous disk 21 can be provided to prevent the valve disk 10 from sliding off the clip 20.
  • the valve disk 10 is centered together with the support disk 11 by the storage housing 1, which is produced as a welded construction including a tube and flanges.
  • the pressure chamber 7 is delimited by a pressure chamber housing 6, which consists of an internally conical ring with a bevel 15. Otherwise, the function is as described above, but the valve disk 10 forms a unit with the support disk 11, which is raised from the inner end of the tube 5 when triggered.
  • the exemplary embodiment shown in FIG. 3 differs from the ones described above primarily in that the pressure chamber housing 6 is designed as a simple ring.
  • the support disk 11 strikes the cover 3 of the storage housing 1, which does not further bother.
  • the elastic valve disk 10 rests against the inside of the chamber housing 6, which is designed as a ring, and returns to the state shown in FIG. 3 when it is filled.
  • valve disk 10 and the support disk 11 are shown for clarification, connected by a clip 20 with a bulbous disk 21, in order to be able to recognize details more precisely.
  • the support plate 11 is completely enclosed, that is covered by the elastic material of the valve plate 10 also on the side facing the pressure chamber.
  • this exemplary embodiment is particularly suitable for pressure chambers 7 which are completely flat in themselves. The impact in the event of a trigger is well dampened.
  • the exemplary embodiment shown in FIG. 6 differs from the exemplary embodiments described above in that the valve disk 10 is held on the side facing away from the pressure chamber 7 with the aid of a support ring 22.
  • the support ring 22 is welded to the storage housing 1 and bears openings 23 at intervals which let the air in the storage housing 1 pass when it is filled. If necessary. the valve disk 10 bulges slightly under pressure when filling between the tube 5 and the inside of the ring 22, so that the outer edge of the valve disk 10 is slightly pulled inwards. This opens the openings 23.
  • valve disc 10 After filling, the valve disc 10, which can be made of a very elastic quality, takes up the position shown in FIG. 6 again. The same applies after a shot, during which the valve disk 10 is lifted off the tube 5. During this lifting, too, the outer edge of the valve disk 10 is pulled slightly inward, but it remains in the region of the support ring 23, so that its position is maintained. In addition, a modification of the attachment of the support disk 11 to the valve disk 10 can be seen in FIG. 6, which primarily indicates that all possible attachments can be considered at this point.
  • the devices presented are generally only used when necessary because they have a relatively high air consumption and compressed air is relatively expensive.
  • Another advantage of the device is that the valve disc 10 closes the tube 5 in the idle state, so that dusts located in the corresponding silo container cannot penetrate the device. A deposit within the tube 5 is harmless and does not last long; At the latest when the next pressure wave is released, these deposits are blown out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • External Artificial Organs (AREA)
  • Pens And Brushes (AREA)
  • Soil Working Implements (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Vending Machines For Individual Products (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Surgical Instruments (AREA)
  • Safety Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (11)

  1. Appareil pour la production intermittente d'une onde de pression dans des silos ou d'autres conteneurs,
    - dans lequel un tuyau (5) pour laisser échapper les ondes de pression,
    - un bâti accumulateur (1) qui entoure le tuyau (5) pour accumuler l'air comprimé et
    - un élément d'étanchéité étendu en surface (10) sont prévus,
    - l'élément d'étanchéité (10) adhère, à l'état de repos chargé, à l'extrémité intérieure du tuyau (5),
    - ferme une chambre de compression (7) sur le côté qui est détourné du tuyau (5),
    - est chargé sur l'un des côtés avec la pression intérieure de la chambre de compression (7) et
    - sur l'autre côté à l'extérieur du tuyau (5) avec la pression qui règne dans le bâti accumulateur (1) et
    - en cas de déclenchement par purge de la chambre de compression (7) se détache de l'extrémité du tuyau pour réaliser une jonction entre le bâti accumulateur (1) et le tuyau (5),
    - le bâti accumulateur (1) pouvant être rempli par un passage
    - qui contient la chambre de compression (7),
    - caractérisé en ce
    - que l'élément d'étanchéité étendu en surface est un disque de soupape non encastré (10)
    - dont le bord est d'une part suffisamment élastique pour faire passer, lors du remplissage, l'air comprimé de la chambre de compression (7) dans le bâti accumulateur (1) et
    - d'autre part suffisamment rigide pour centrer le disque de soupape (10) tout au moins grossièrement,
    - la chambre de compression (7) mordant sur la section de bord du disque de soupape (10) tout au moins partiellement et
    - le disque de soupape (10) portant, dans sa section centrale, un renforcement.
  2. Appareil selon la revendication 1, caractérisé en ce que le renforcement du disque de soupape (10) mord sur l'extrémité intérieure du tuyau (5).
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que le renforcement est configuré comme un disque de support séparé (11) qui est placé sur le côté du disque de soupape (10) qui est détourné du tuyau (5) et fixé sur ce côté.
  4. Appareil selon la revendication 3, caractérisé en ce que le disque de support (11) est constitué en matière synthétique ou en métal léger.
  5. Appareil selon la revendication 3 ou 4, caractérisé en ce que le bord du disque de support qui est tourné vers la chambre de compression (7) est biseauté ou adapté aux contours de la chambre de compression (7).
  6. Appareil selon l'une des revendications précédentes, caractérisé en ce que le disque de soupape (10) est constitué en matière synthétique ou en caoutchouc.
  7. Appareil selon la revendication 6, caractérisé en ce que le disque de soupape (10) porte un insert tissé.
  8. Appareil selon l'une des revendications 1 à 4, caractérisé en ce que le disque de soupape (10) est constitué par une plaque centrale en acier, en aluminium ou en une matière synthétique dure avec un recouvrement polymère.
  9. Appareil selon l'une des revendications précédentes, caractérisé en ce que la surface de la fente entre l'extrémité du tuyau et le disque de soupape (10) lors de l'émission d'une onde de pression est au moins aussi grande que la surface de la section du tuyau (5).
  10. Appareil selon l'une des revendications précédentes, caractérisé en ce que le disque de soupape (10) est constitué par une mince plaque flexible en métal et que, pour l'étanchement dans la zone du tuyau (5) , il existe un anneau d'étanchéité résistant à la température en matière synthétique, en liège ou en métal léger.
  11. Appareil selon l'une des revendications précédentes, caractérisé en ce que
    - le bord extérieur du disque de soupape (10) est configuré sur le côté qui est détourné de la chambre de compression (7) à l'aide d'un anneau de support (22) entre celui-ci et le bord inférieur de la chambre de compression (7) de telle manière
    - que le disque de soupape (10) se bossèle légèrement sous la pression lors du remplissage entre le tuyau (5) et la face intérieure de l'anneau 22) si bien que le bord extérieur du disque de soupape (10) est légèrement tiré vers l'intérieur
    - et que, lors du détachement, le bord extérieur du disque de soupape (10) est légèrement tiré vers l'intérieur tout en restant dans la zone de l'anneau de support (23) si bien que le maintien de sa position est garanti.
EP90119210A 1989-10-20 1990-10-06 Dispositif pour la production d'une onde de pression Expired - Lifetime EP0423572B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3934988A DE3934988A1 (de) 1989-10-20 1989-10-20 Geraet zur erzeugung einer druckwelle
DE3934988 1989-10-20

Publications (2)

Publication Number Publication Date
EP0423572A1 EP0423572A1 (fr) 1991-04-24
EP0423572B1 true EP0423572B1 (fr) 1994-07-27

Family

ID=6391855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119210A Expired - Lifetime EP0423572B1 (fr) 1989-10-20 1990-10-06 Dispositif pour la production d'une onde de pression

Country Status (8)

Country Link
EP (1) EP0423572B1 (fr)
JP (1) JPH03148487A (fr)
CN (1) CN1024776C (fr)
AT (1) ATE109102T1 (fr)
AU (1) AU625447B2 (fr)
DE (2) DE3934988A1 (fr)
NO (1) NO904516L (fr)
ZA (1) ZA908383B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4415041C2 (de) * 1994-04-29 1996-07-18 Euba Antriebstechnik Eller Gmb Vorrichtung zur Erzeugung einer Druckwelle
ITBG20050019A1 (it) 2005-05-10 2006-11-11 Larix Srl Valvola di sparo
ITMI20061406A1 (it) 2006-07-20 2008-01-21 Larix Srl Valvola di sparo a regolazione fine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788527A (en) * 1973-01-22 1974-01-29 Martin Eng Co Quick-release aerator for introducing high pressure air into a container to facilitate dispensing
CH558492A (de) * 1973-12-01 1975-01-31 Luetolf Markus Rueckschlagventil, fuer gasfoermige und fluessige medien.
US3915339A (en) * 1974-07-08 1975-10-28 Matson C G Quick-release aerator for introducing high pressure air into a container to facilitate dispensing
US4046011A (en) * 1976-06-29 1977-09-06 Olsen Donald W One-way valve for fluid sampler device
NL8501483A (nl) * 1985-05-24 1986-12-16 Tech Bureau Knol B V Luchtstootapparaat.

Also Published As

Publication number Publication date
ZA908383B (en) 1991-08-28
NO904516L (no) 1991-04-22
AU6399990A (en) 1991-04-26
JPH03148487A (ja) 1991-06-25
EP0423572A1 (fr) 1991-04-24
DE59006577D1 (de) 1994-09-01
ATE109102T1 (de) 1994-08-15
CN1051022A (zh) 1991-05-01
AU625447B2 (en) 1992-07-09
DE3934988A1 (de) 1991-04-25
CN1024776C (zh) 1994-06-01
NO904516D0 (no) 1990-10-18

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