EP2571657A1 - Procédé et dispositif de transport et de dosage d'un matériau en vrac dans le traitement au jet abrasif - Google Patents

Procédé et dispositif de transport et de dosage d'un matériau en vrac dans le traitement au jet abrasif

Info

Publication number
EP2571657A1
EP2571657A1 EP11735773A EP11735773A EP2571657A1 EP 2571657 A1 EP2571657 A1 EP 2571657A1 EP 11735773 A EP11735773 A EP 11735773A EP 11735773 A EP11735773 A EP 11735773A EP 2571657 A1 EP2571657 A1 EP 2571657A1
Authority
EP
European Patent Office
Prior art keywords
bulk material
reservoir
injection
negative pressure
metering
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
EP11735773A
Other languages
German (de)
English (en)
Other versions
EP2571657B1 (fr
Inventor
Gerd Pieper
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.)
Pieper Innovationsgesellschaft mbH
Original Assignee
Pieper Innovationsgesellschaft mbH
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 Pieper Innovationsgesellschaft mbH filed Critical Pieper Innovationsgesellschaft mbH
Publication of EP2571657A1 publication Critical patent/EP2571657A1/fr
Application granted granted Critical
Publication of EP2571657B1 publication Critical patent/EP2571657B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • B24C3/065—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable with suction means for the abrasive and the waste material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/003—Removing abrasive powder out of the blasting machine

Definitions

  • the invention relates to a method for conveying and metering bulk material, for example blasting agents, welding powder, coating agents or the like, during processing, bonding or coating of surfaces by means of vacuum suction blasting, in which the bulk material is placed under vacuum in a suction unit Reservoir kept ready, transported by this the bulk material via a hose line to an injection jet, accelerated by an atmospheric sucked foreign air stream and directed to a held by a jet hood under vacuum processing surface, sucked from the jet hood, then fed to a separation unit for cleaning and in the Reservoir is transported back so that the bulk material can be circulated.
  • bulk material for example blasting agents, welding powder, coating agents or the like
  • the invention further relates to an apparatus for performing the method, - with at least one reservoir for receiving a loose bulk material, a separation unit for cleaning the bulk material, a suction unit connected to the separation unit for generating a negative pressure in the reservoir, one connected to the reservoir Hose feed line for transporting the bulk material into an injection blasting lance guided to a blasting hood set under negative pressure for
  • From DE 101 02 924 Cl is a method for beam processing, in particular dimensionally accurate removal and / or compaction and / or coating of solid surfaces, such as removal of paint defects from Lackier moral, smoothing of solder and welds, removal of contaminated concrete layers or Known rust layers, hardening, leveling or coating of metal surfaces, in which a blasting agent in a vacuum-generated Tragluftstrom metered by gravity and / or injector, transported in a hose system to a jet lance and directed through a blasting chamber under negative pressure processing surface, from there into the air flow back, cleaned and possibly circulated, wherein the acceleration of the blasting agent is generated by the negative pressure and the blasting chamber is shifted from the processing surface to the processing surface.
  • the blasting agent is given at least one additional energy pulse by at least one further sucked by the negative pressure, at least atmospheric pressure gas stream to achieve a lying well above the flow velocity of the carrier air flow end velocity, with the energy input into the surface to be processed depending on the parameters, type and shape the working surface and the blasting agent, degree of loading of the carrier air stream with blasting agent, negative pressure in the carrier air flow, blasting time and
  • Beam temperature is set.
  • This known method operates with a storage container for the blasting material in which a plurality of bulk hopper are arranged one above the other, which are pneumatically separated by closing members such as flaps, valves or valves.
  • the blasting agent passes by gravity from these bulk hoppers in the metering device, which is under normal pressure.
  • the interfaces between the various pressure areas within a plant are often vulnerable, because blasting agents of different types and shapes are used, which complicate a pneumatic separation.
  • the juxtaposition of underpressure and overpressure always leads to Pressure losses, which must be compensated by a corresponding dimensioning of the suction unit.
  • the present invention seeks to provide a method and apparatus for conveying, transporting and dosing of bulk material, for example blasting abrasive, welding powder,
  • Coating agent o The like. To provide when processing, bonding or coating surfaces by vacuum suction, in the conveying, transporting and dosing exclusively in vacuum while simplifying the procedures and assemblies for the reservoir and the dosage, increasing the reliability and economy of costs becomes possible.
  • the negative pressure is set by sucking an at least under atmospheric pressure or negative pressure air flow as transport air to a value which is greater than the negative pressure in the jet hood or in the Reservoir, wherein the removal and metering of the blasting agent by means of the rule between jet lance and In dosing metering
  • Injection metering tube and jet lance is set.
  • the bulk material bed is stored on a conical bottom in the reservoir in the tube-like, bottom closed removal area, the bulk material brought together by gravity and the bed height above the removal area almost a maximum value, wherein the injection metering tube generated by the injection Suction flow for removal and metering of the blasting medium is directed into this area.
  • the removal area is sealed off from the separation unit by the bulk material charge arranged above it by a sufficiently large pad of bulk material, whereby two different levels of underpressure within the storage container can function safely next to one another.
  • the bulk material bed is loosened in the removal area by an atmospheric external air flow, which is associated from the outside with a fluidizing tube or by a removal region Air admission hole is directed into the removal area.
  • a further embodiment of the method according to the invention provides that the bulk material is loosened in the removal area by a removed from the suction air of the separation unit air flow, which is directed with a connected via an inlet cone in the separation unit Pitot tube in the removal area.
  • the negative pressure at the injection metering tube to values between 30 to 350 mbar, preferably 200 mbar and the negative pressure in the reservoir or the jet hood to> 400 mbar, preferably 150 to 250 mbar set. This pressure difference is sufficient to remove the blasting agent with the injection metering tube from the removal area of the blasting material bed and to meter accordingly sensitive in the transport stream.
  • the inventive method is variable. Thus, it can be used anywhere where machining operations are carried out with the vacuum suction, for example, to remove paint defects from coatings, deburring, smoothing soldering and welding seams, removal of contaminated concrete layers or rust layers, hardening, leveling or coating metal surfaces, joining by welding, drilling and stripping solar cells, etc.
  • the object is further achieved by a device in that for dosing and conveying the bulk material immersed in the interior of the bulk bed in the reservoir, a removal area of the bed detecting injection metering tube is provided for sucking at least under atmospheric pressure or negative pressure air flow , In the downstream dosing tube is connected downstream with the injection jet through the hose inlet.
  • Metering tube is guided with its suction opening in the removal area for sucking and dosing of bulk material.
  • the injection metering tube has a suction opening which is in communication with the atmospheric air outside of the reservoir and whose size is adjustable by a slider.
  • the device according to the invention can be arranged in the injection tube but also completely within the reservoir.
  • the suction port of the injection metering tube communicates with the negative pressure atmosphere in the reservoir.
  • the injection metering can with respect to the removal of any mounting position, preferably occupy an angle of 20 ° to the container axis, so that depending on the technical requirements, the injection dosing can be arranged horizontally, vertically or in an angular position.
  • the device according to the invention is provided in the bottom of the removal area with the outside atmosphere in communication air inlet bore through which a certain amount of external air for loosening the Strahlstoff forung is directed into the removal area.
  • a fluidizing pipe for supplying an atmospheric air flow for the purpose of loosening the bulk material in the bulk solids discharge of the removal area is performed. This allows an exact dosage of even the smallest amounts and prevents blockages at the suction port of the injection metering tube.
  • the device according to the invention is in the removal area connected to the inflow cone of the separation unit Pitot tube for supplying an air flow from the negative pressure of the Separator provided for the purpose of loosening the bulk bed.
  • the device of the invention is simple and robust in construction and has the great advantage that the removal and metering of the bulk material quantity can be done directly from the negative pressure region of the reservoir without a special pneumatic separation of metering and feeding of bulk material are required.
  • FIG. 1 shows a functional diagram of the method according to the invention with an injection tube in connection with the outside atmosphere
  • Fig. 2 is a side view of the injection metering tube in a sectional view
  • FIG 3 shows a variant of the method according to the invention, in which the injection metering tube communicates with the negative pressure atmosphere in the reservoir, Fig. 4a to 4c variants for loosening the abrasive bulk in the removal area.
  • Fig. 1 shows a schematic functional diagram of the method according to the invention for performing a processing on a vertical flat surface 1.
  • a suction unit 2 With a suction unit 2, a carrier air flow T LM of 20 m 3 / h to 300 m 3 / h and at the same time a negative pressure generated from 30 to 350 mbar.
  • the suction unit 2 is connected via a hose 3 to a separation unit 4, which closes a reservoir 5 of about 0.1 to 200 liters pressure-tight, so that in the reservoir 5 of the suction unit 2 generated negative pressure of for example 200 mbar is applied.
  • the bottom 6 of the reservoir 5 is formed as a cone bottom 6a with an opening angle between 90 and 120 °, preferably 90 °, and has at its lowest point P in alignment with the container axis E-E closed by a bottom 8 removal area. 7
  • the reservoir 5 was filled before closing by the separation unit 4 with a loose bulk S of bulk material, such as corundum, glass breakage, zircon sand, slag, steel, cast steel, ceramics, welding powder, etc., which is stored on the conical bottom 6a.
  • a loose bulk S of bulk material such as corundum, glass breakage, zircon sand, slag, steel, cast steel, ceramics, welding powder, etc.
  • an elongated injection metering tube 9 is guided, the suction port 10 close at the bottom 8 of the removal area 7 ends.
  • the injection metering tube 9 penetrates the container wall 11 of the storage container 5 and is at an angle ß of> 5 ° (see also 4a) fixed to the container axis EE at this, wherein the penetration is pressure-tight.
  • the injection metering 9 Downstream, the injection metering 9 has an intake 12, which is according to FIG. 1 outside of the reservoir 5 and thus has a direct connection to the atmospheric air.
  • the injection metering tube 9 For further construction of the injection metering tube 9, reference is made to that in section [0034] (see also FIG. 2).
  • a hose feed line 30 is connected to a
  • Injector jet lance 14 leads, the outlet end 15 in a
  • Injector jet lance 14 has connection to the outside atmosphere.
  • a hose outlet 18 leads back to the reservoir 5, wherein the hose discharge 18 opens approximately in height of the Anströmkegels 19 of the separation unit 4 in the reservoir 5, so that a closed circuit for the carrier air Ström T LM is formed, which ensures that in the injection metering tube 9, in the hose feed line 13, in the injector jet lance 14, in the jet hood 16 and the hose section 18 equally prevails in the reservoir 5 prevailing negative pressure p UB , which may be in the range between 30 to> 350 mbar.
  • the carrier air flow T LM promotes via the suction port 12 of the injection metering tube 9, an air flow L D , the additional negative pressure p D in the injection metering tube 9, ie at the suction opening 10 of the In dosing metering tube 9, and which sucks the bulk material from the removal region 7.
  • the injection metering tube 9 is designed so that it can be operated at a negative pressure p D of 60 to 360 mbar, ie there must always be a negative pressure difference ⁇ between the negative pressure p ST at the jet lance 14 and the negative pressure p D at the injection metering 9 of at least 10 mbar in favor of the negative pressure at the injection metering tube 9 be present so that the injection metering 9 sure suck the desired amount of bulk material from the removal area 7 and can promote in the carrier air flow T LM .
  • the bed height SH of the bulk bed reaches above the removal area 7 substantially a maximum, so that the bulk material in the reservoir 5 forms a sufficient barrier against the negative pressure p VB in the rest of the reservoir 5.
  • the removal region 7 is sealed off by the bulk material, so that the pressure applied to the injection metering 9, compared to the negative pressure P U B in the reservoir 5 higher negative pressure p D sufficient to remove the blasting agent from the removal area safely.
  • the amount of air flow L D at the injection metering 9 can be adjusted by adjusting the amount of air flow L D at the injection metering 9 depending on the pressure prevailing at the injection jet lance 14 negative pressure 0 sT the amount of sucked bulk material.
  • Fig. 2 shows the basic structure of
  • the injection metering 9 in section in side view.
  • the injection metering 9 consists of an outer tube 20 with a diameter of for example 20 mm, in which an inner tube 21 is inserted with, for example, a diameter of 10 mm and due to the small
  • the inner tube 21 is shorter in relation to the outer tube 20 and ends in front of the suction opening 10 arranged in the outer tube 20. Both tubes 20 and 21 are fixed in a sleeve 22. At the downstream end 13 of the outer tube 20 is the suction port 12 for sucking the air flow L D / whose size can be adjusted by a slider 23 according to the desired metered amount of bulk material to be sucked.
  • the suction-side end 24 of the outer tube 20 is closed by a cover 25 bent at an angle of, for example, 35 °.
  • the suction opening 10 of the In etations-Dosierrohres 9 is parallel to the longitudinal axis B-B of the outer tube in the lateral surface of the outer tube 20, so that a blockage of the suction opening 10 is counteracted by bulk material.
  • the outer tube 20 and inner tube 21 of the Inj dosing metering tube 9 made of stainless steel, ceramic or other wear-resistant materials.
  • FIG. 3 illustrates a further variant of the method according to the invention.
  • the injection metering tube 9 is in this case completely in the reservoir 5 and has no connection to the outside atmosphere.
  • the suction port 12 of the injection metering 9 sucks the air flow L D from the
  • Fig. 4b shows another variant of the loosening, which consists in that a fluidizing tube 27 is guided into the removal region 7.
  • Fig. 4c shows the possibility of the inflow cone 19 of the separation unit 4 via a pitot tube 28 an air flow L R from the carrier air flow TLM targeted as a dynamic pressure in the removal area 7 to lead.
  • the injection metering 9 inside and outside of the reservoir 5 can have any mounting position with respect to the removal area 7.
  • the injection metering tube 9 can be arranged horizontally, vertically or even at an angle ⁇ of, for example, 10 ° to the container axis EE.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Basic Packing Technique (AREA)

Abstract

L'invention concerne un procédé de transport et de dosage d'un matériau en vrac, par exemple d'un agent abrasif, d'une poudre de soudage, d'un agent de revêtement ou similaire, pour le traitement, l'assemblage ou le revêtement de surfaces au jet abrasif. Selon le procédé, le matériau en vrac est tenu à disposition dans un réservoir de stockage (5) mis sous pression négative (puB) par un ensemble d'aspiration; le matériau en vrac est acheminé dudit réservoir par l'intermédiaire d'un tuyau flexible (3) jusqu'à une lance d'injection-projection (14) où il est accéléré par un flux aspiré d'air extérieur atmosphérique et dirigé sur une surface à traiter (1) maintenue sous pression négative (puB) par un capot de projection, aspiré hors du capot de projection (14), puis amené pour épuration à une unité de séparation (4) et renvoyé au réservoir de stockage (5) de sorte que le matériau en vrac puisse circuler en boucle fermée. L'invention vise à mettre au point un procédé et un dispositif de transport et de dosage d'un matériau en vrac qui permettent le transport, l'acheminement et le dosage exclusivement sous pression négative tout en simplifiant le déroulement du procédé et les sous-ensembles du réservoir de stockage ainsi que le dosage, et qui permettent une augmentation de la sécurité de fonctionnement et une réduction des coûts. A cet effet, un flux aspirant pour le prélèvement et le dosage du matériau en vrac est produit au moyen d'un tuyau d'injection-dosage (9) immergé dans une zone de prélèvement (7) du matériau en vrac, la pression négative (pD) dudit flux étant ajustée par aspiration d'un flux d'air (LD) en tant qu'air de transport se trouvant au moins à la pression atmosphérique ou à une pression négative, à une valeur supérieure à la pression négative (pUB) régnant dans le capot de projection (14) ou dans le réservoir de stockage (5). La quantité de matériau en vrac prélevée et dosée est ajustée par la différence de pression négative (Δp) des flux d'air aspirés (LD ; LST) existant entre la lance de projection (14) et le tuyau d'injection-dosage (9) par le tuyau d'injection-dosage (9) et la lance de projection (14).
EP20110735773 2010-05-17 2011-05-16 Procédé et dispositif de transport et de dosage d'un matériau en vrac dans le traitement au jet abrasif Active EP2571657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010020691 DE102010020691B4 (de) 2010-05-17 2010-05-17 Verfahren und Vorrichtung zum Fördern und Dosieren von Schüttgut beim Vakuumsaugstrahlen
PCT/DE2011/001082 WO2012019576A1 (fr) 2010-05-17 2011-05-16 Procédé et dispositif de transport et de dosage d'un matériau en vrac dans le traitement au jet abrasif

Publications (2)

Publication Number Publication Date
EP2571657A1 true EP2571657A1 (fr) 2013-03-27
EP2571657B1 EP2571657B1 (fr) 2015-04-29

Family

ID=44859676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110735773 Active EP2571657B1 (fr) 2010-05-17 2011-05-16 Procédé et dispositif de transport et de dosage d'un matériau en vrac dans le traitement au jet abrasif

Country Status (4)

Country Link
EP (1) EP2571657B1 (fr)
DE (1) DE102010020691B4 (fr)
DK (1) DK2571657T3 (fr)
WO (1) WO2012019576A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN108136565A (zh) * 2015-10-09 2018-06-08 奥迪股份公司 用于处理构件的表面的方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015006504B4 (de) 2015-05-22 2019-05-29 GP Anlagenbau GmbH Verfahren und Vorrichtung zum Reduzieren einer elektrostatischen Aufladung beim Bearbeiten, Verbinden oder Beschichten von Flächen mittels Vakuumsaugstrahlen
EP3146933B1 (fr) * 2015-09-22 2019-11-20 Ferton Holding S.A. Chambre de poudre pour un dispositif de polissage par air et dispositif de polissage par air
DE102020104689A1 (de) 2020-02-21 2021-08-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Vorrichtung und Verfahren für einen Materialabtrag an Faserverbundwerkstoffen, insbesondere zum Schäften
DE102020118828A1 (de) 2020-07-16 2022-01-20 Dyemansion Gmbh Betreiben einer Strahlanlage mit Steuerdaten
CN214086655U (zh) * 2020-12-23 2021-08-31 江苏博迁新材料股份有限公司 一种超细粉体吸入式喂料设备

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DE4344947A1 (de) * 1993-12-24 1995-08-17 Klaus Frohne Anordnung zum staublosen Schleuderstrahlen
WO1997049525A1 (fr) * 1996-06-27 1997-12-31 Wizard Technology Limited Dispositif de projection abrasive
DE19747838C2 (de) * 1997-10-19 2001-07-12 Gp Granulate Pneumatic Geraete Verfahren und Vorrichtung zum trockenen Entfernen von Beschichtungen, Graffiti oder sonstigen oberflächlichen Verunreinigungen
DE10257241B4 (de) * 2001-01-23 2006-08-17 Pieper Innovationsgesellschaft Mbh Vorrichtung, insbesondere Werkstatt- und/oder Hobbysystem zum Bearbeiten, insbesondere Vakuumsaugstrahlen, von Flächen
DE10102924C1 (de) * 2001-01-23 2002-06-13 Pieper Innovationsgmbh Verfahren und Vorrichtung zum Strahlbearbeiten, insbesondere formgenauen Abtragen und/oder Verdichten und/oder Beschichten, von festen Flächen
EP2177317A1 (fr) * 2008-10-14 2010-04-21 HRV Engineering GmbH Transporteur abrasif

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108136565A (zh) * 2015-10-09 2018-06-08 奥迪股份公司 用于处理构件的表面的方法

Also Published As

Publication number Publication date
DE102010020691B4 (de) 2014-09-04
DE102010020691A1 (de) 2011-11-17
WO2012019576A1 (fr) 2012-02-16
DK2571657T3 (da) 2015-08-03
EP2571657B1 (fr) 2015-04-29

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