EP2571657B1 - Method and device for conveying and metering bulk material in vacuum suction blasting - Google Patents
Method and device for conveying and metering bulk material in vacuum suction blasting Download PDFInfo
- Publication number
- EP2571657B1 EP2571657B1 EP20110735773 EP11735773A EP2571657B1 EP 2571657 B1 EP2571657 B1 EP 2571657B1 EP 20110735773 EP20110735773 EP 20110735773 EP 11735773 A EP11735773 A EP 11735773A EP 2571657 B1 EP2571657 B1 EP 2571657B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bulk material
- reservoir
- removal region
- injection
- tube
- 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.)
- Active
Links
- 239000013590 bulk material Substances 0.000 title claims description 66
- 238000005422 blasting Methods 0.000 title claims description 38
- 238000000034 method Methods 0.000 title claims description 24
- 238000002347 injection Methods 0.000 claims description 67
- 239000007924 injection Substances 0.000 claims description 67
- 238000000926 separation method Methods 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 13
- 238000003860 storage Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Images
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 dosing of bulk material, for example, blasting agents, welding powder, coating agent o. The like.,
- bulk material for example, blasting agents, welding powder, coating agent o. The like.
- vacuum suction In which the bulk material held in a set by a suction unit under vacuum reservoir from this transported the bulk material via a hose line to an injection beam lance, accelerated there by an atmospherically sucked foreign air stream and directed to a held by a jet hood vacuum working surface, sucked out of the jet hood, then fed to a separation unit for cleaning and is returned to the reservoir, so that the bulk material can be circulated.
- the invention further relates to an apparatus for carrying out the method, comprising at least one storage container 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, a hose supply line connected to the reservoir for transporting the Bulk material in an injection blasting lance guided to a blasting hood placed under reduced pressure for accelerating the bulk material through a stream of air sucked in by the injection blasting lance at least under atmospheric pressure in the direction of a processing surface and a hose discharge connected to the blasting hood for sucking off the bulk material and the abraded particles from the jet hood in the separation unit and strictlybe statisticsn in the reservoir.
- From the DE 101 02 924 C1 is a method for beam processing, in particular dimensionally accurate removal and / or compacting and / or coating of solid surfaces, for example removing paint defects from Lackier lake, smoothing soldering and welding seams, removal of contaminated concrete layers or rust layers, hardening, leveling or coating of metal surfaces known in which a blasting medium is metered in by means of gravity and / or injector action in a conveying air flow generated by negative pressure, conveyed in a hose line system to a jet lance and directed onto a working surface set under negative pressure by a blasting chamber, 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 flow with blasting agent, negative pressure in the carrier air flow, jet time and jet temperature is set.
- This known method works 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 abrasive, welding powder, coating agent o. The like., When working, bonding or coating surfaces by means of vacuum suction, in the the conveying, transporting and dosing only in the negative pressure while simplifying the procedures and the assemblies for the reservoir and the dosage, increasing the reliability and cost savings is possible.
- the solution according to the invention is based on the knowledge of laying the dosing process in the vacuum range, so that the conveying, transporting and dosing of the blasting agent can be carried out within a completely held under negative pressure circuit.
- a suction flow for removal and metering of the blasting agent is produced with a submerged in a removal area of the bulk bed injection metering, wherein the bulk of the bulk material is loosened in the removal area by an extracted from the suction air of the separation unit air flow, with a is directed into the removal area via a pitot tube connected in the inflow cone of the separation unit.
- the bulk material bed is stored on a conical bottom in the reservoir, in the tube-like, closed bottom removal area, the bulk material brought together by gravity and the bed height above the sampling area almost a maximum value, wherein the suction flow generated by the injection metering tube for removal and dosage of the blasting agent is directed in this area.
- the removal area is sealed off from the separation unit by the bulk material bulk disposed 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 in the removal area is loosened up by an atmospheric stream of external air, which is supplied from the outside to a fluidizing pipe or through a discharge pipe Air admission hole is directed into 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 method according to the invention can be used variably. Thus, it can be used everywhere where machining operations are performed with the vacuum suction blasting, for example, for removing paint defects from painting, deburring, smoothing solder and welds, removal of contaminated concrete layers or rust layers, hardening, leveling or coating of metal surfaces, connecting through Welding, drilling and stripping of solar cells etc.
- the object is further achieved by a device in that for dosing and conveying the bulk material into the interior of the bulk bed in the reservoir immersion, a discharge area of the bed detecting injection metering tube is provided for sucking at least under atmospheric pressure or negative pressure air stream, wherein in the removal area connected to the Anströmkegel the separation unit pitot tube for supplying an air flow from the vacuum atmosphere in the reservoir for the purpose of loosening the bulk bed in the removal area is guided, and wherein the injection metering tube is connected downstream with the injection jet through the hose inlet, in which a operated with positive pressure additional injector to maintain a pressure difference between the injector jet lance and injection metering tube is provided.
- the reservoir has a conical bottom for bearing the bulk material, which merges at its lowest point in a tubular, completed by a bottom removal area in which the bulk of the bed by gravity focusing converges and the bed above the removal area a has almost maximum dumping height, the injection 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 the reservoir and whose size is adjustable by a slider.
- the device according to the invention can also be arranged completely within the storage container.
- the suction port of the injection metering tube communicates with the negative pressure atmosphere in the reservoir.
- the injection metering tube can assume any desired installation position, preferably an angle of 20 ° to the container axis, so that the injection metering tube can be arranged horizontally, vertically or in an angular position, depending on the plant-specific requirements.
- an air inlet bore communicating with the outside atmosphere is provided in the bottom of the removal area, by means of which a certain amount of external air is directed into the removal area for loosening up the abrasive bulk.
- a fluidizing tube for supplying an atmospheric air stream for the purpose of loosening the bulk material is guided into the bulk material bulk of the removal area. 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 simple and robust in construction and has the great advantage that the removal and metering of the bulk material quantity can be carried out directly from the negative pressure region of the reservoir, without that a special pneumatic separation of metering and feeding of bulk material are required.
- the Fig. 1 shows a schematic functional diagram of the method according to the invention for performing a machining on a vertical flat surface 1.
- a carrier air flow T LM of 20 m 3 / h to 300 m 3 / h and at the same time generates a negative pressure of 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 cone bottom 6a.
- a loose bulk S of bulk material such as corundum, glass breakage, zircon sand, slag, steel, cast steel, ceramics, welding powder, etc.
- Part of the bulk material slides down by gravity along the cone bottom 6a and fills the removal region 7, which has been closed outwards through the bottom 8, with the bulk material, the bulk level SH reaching essentially a maximum value above the removal region 7.
- an elongated injection metering tube 9 is guided, the suction opening 10 ends near the bottom 8 of the removal region 7.
- the injection metering tube 9 penetrates the container wall 11 of the storage container 5 and is at an angle ⁇ of> 5 ° (see also 4a ) Fixed to the container axis EE at this, the penetration is carried out pressure-tight. Downstream, the injection metering 9 has a Intake opening 12, which in accordance with Fig. 1 located outside of the reservoir 5 and thus has a direct connection to the atmospheric air.
- Intake opening 12 for a further construction of the injection metering tube 9, reference is made to that in section [0034] (see also FIG Fig. 2 ).
- a hose feed line 30 is connected, which leads to an injector jet lance 14 whose outlet end 15 is inserted into a jet hood 16.
- the suction port 17 of the injector jet lance 14 is connected 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 flow T LM is created, which ensures that in Injection metering 9, in the hose inlet 13, in the injector jet lance 14, in the jet hood 16 and the hose section 18 equally prevailing in the reservoir 5 negative pressure p UB is applied, 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 dosing 9 an air flow L D , the additional negative pressure p D in the injection dosing 9, ie at the suction port 10 of the injection dosing 9, and generates the bulk material from the removal area 7 sucks.
- the injection metering tube 9 is designed so that it operates at a negative pressure p D of 60 to 360 mbar can be, ie there must always be a negative pressure difference ⁇ p 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 on the injection metering tube 9 so that the injection metering 9 safely 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 UB in the rest of the reservoir 5.
- the removal area 7 is sealed off by the bulk material, so that the negative pressure p D applied to the injection metering tube 9, which is higher than the negative pressure p UB in the storage container 5, is sufficient to reliably remove the blasting agent from the removal area.
- the amount of air flow L D at the injection metering 9 can be adjusted by regulating the amount of air flow L D at the injection metering 9 depending on the prevailing at the injection jet lance 14 vacuum p UST the amount of sucked bulk material.
- Fig. 2 shows the basic structure of the injection metering tube 9 in section in side view.
- the injection metering tube 9 consists of an outer tube 20 with a diameter of for example 20 mm, into which an inner tube 21 is inserted with a diameter of 10 mm, for example, and forms an annular gap to the suction opening 10 due to the small difference in diameter.
- the inner tube 21 is shorter with respect 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 injection metering tube 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 injection metering tube 9 made of stainless steel, ceramic or other wear-resistant materials.
- Fig. 3 is a further variant of the method according to the invention illustrated.
- the injection metering 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 negative pressure atmosphere of the reservoir 5 at.
- the sequence and the mode of operation of the method according to the invention then further correspond to the manner shown in section [0032]. It must only be ensured that the pressure difference ⁇ p in the sub-pressures between injection metering tube 9 and injection jet lance 14 reaches a corresponding magnitude. This can be assisted, for example, with an injector 29 which is additionally inserted into the hose feed line 30 and which is operated with overpressure.
- Fig. 4a to 4c show possibilities to loosen the filled with bulk material removal area 7 in the reservoir 5.
- FIG. 4b shows another variant of the loosening, which consists in that a fluidizing tube 27 is guided into the removal region 7.
- the fluidizing tube 27 has a connection to the outside atmosphere and directs an atmospheric air flow targeted into the removal region 7.
- FIG Fig. 4c the possibility of the inflow cone 19 of the separation unit 4 via a pitot tube 28 a targeted air flow L A from the carrier air flow TLM as dynamic pressure in the removal area 7.
- the injection metering 9 inside and outside of the reservoir 5 may have any mounting position with respect to the removal region 7.
- the injection metering 9 can be arranged horizontally, vertically or else 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)
Description
Die Erfindung betrifft ein Verfahren zum Fördern und Dosieren von Schüttgut, beispielsweise Strahlmittel, Schweißpulver, Beschichtungsmittel o. dgl., beim Bearbeiten, Verbinden oder Beschichten von Flächen mittels Vakuumsaugstrahlen, bei dem das Schüttgut in einem von einem Saugaggregat unter Unterdruck gesetzten Vorratsbehälter bereitgehalten, von diesem das Schüttgut über eine Schlauchleitung zu einer Injektions-Strahllanze befördert, dort durch einen atmosphärisch angesaugten Fremdluftstrom beschleunigt und auf eine durch eine Strahlhaube unter Unterdruck gehaltene Bearbeitungsfläche gelenkt, aus der Strahlhaube abgesaugt, dann einer Abscheideeinheit zum Reinigen zugeführt und in den Vorratsbehälter zurückbefördert wird, so dass das Schüttgut im Kreislauf gefahren werden kann.The invention relates to a method for conveying and dosing of bulk material, for example, blasting agents, welding powder, coating agent o. The like., When working, bonding or coating surfaces by vacuum suction, in which the bulk material held in a set by a suction unit under vacuum reservoir from this transported the bulk material via a hose line to an injection beam lance, accelerated there by an atmospherically sucked foreign air stream and directed to a held by a jet hood vacuum working surface, sucked out of the jet hood, then fed to a separation unit for cleaning and is returned to the reservoir, so that the bulk material can be circulated.
Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung des Verfahrens, mit mindestens einem Vorratsbehälter zur Aufnahme eines losen Schüttgutes, einer Abscheideeinheit zum Reinigen des Schüttgutes, einem an die Abscheideeinheit angeschlossenen Saugaggregat zum Erzeugen eines Unterdruckes im Vorratsbehälter, einer mit dem Vorratsbehälter verbundenen Schlauchzuleitung zum Transport des Schüttgutes in eine zu einer unter Unterdruck gesetzten Strahlhaube geführten Injektions-Strahllanze zum Beschleunigen des Schüttgutes durch einen von der Injektion-Strahllanze angesaugten, mindestens unter Atmosphärendruck stehenden Luftstrom in Richtung einer Bearbeitungsfläche und einer an die Strahlhaube angeschlossenen Schlauchableitung zum Absaugen des Schüttgutes und der abgetragenen Teilchen aus der Strahlhaube in die Abscheideeinheit und Zurückbefördern in den Vorratsbehälter.The invention further relates to an apparatus for carrying out the method, comprising at least one storage container 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, a hose supply line connected to the reservoir for transporting the Bulk material in an injection blasting lance guided to a blasting hood placed under reduced pressure for accelerating the bulk material through a stream of air sucked in by the injection blasting lance at least under atmospheric pressure in the direction of a processing surface and a hose discharge connected to the blasting hood for sucking off the bulk material and the abraded particles from the jet hood in the separation unit and zurückbefördern in the reservoir.
Aus der
Dieses bekannte Verfahren arbeitet mit einem Vorratsbehälter für das Strahlgut, in dem mehrere Schütt-Trichter übereinander angeordnet sind, die pneumatisch durch Schließorgane wie Klappen, Schieber oder Ventile voneinander getrennt sind. Das Strahlmittel gelangt durch die Schwerkraft von diesen Schütt-Trichtern in die Dosiervorrichtung, die unter Normaldruck steht. Es bestehen somit voneinander getrennte Unterdruck- und Normaldruckbereiche, die die Förderung, den Transport und die Dosierung des Strahlmittels im Verfahrensablauf deutlich verkomplizieren und den Aufwand für eine Vakuumsaugstrahlanlage verteuern. Außerdem sind die Schnittstellen zwischen den verschiedenen Druckbereichen innerhalb einer Anlage oftmals anfällig, weil Strahlmittel unterschiedlicher Art und Form zur Anwendung kommen, die eine pneumatische Trennung erschweren. Des Weiteren führt das Nebeneinander von Unter- und Überdruck immer zu Druckverlusten, die durch eine entsprechende Dimensionierung des Saugaggregates ausgeglichen werden müssen.This known method works 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. There are therefore separate vacuum and normal pressure ranges that complicate the promotion, transport and dosing of the blasting agent in the process significantly and increase the cost of a vacuum aspirator. In addition, 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. Furthermore, the juxtaposition of underpressure and overpressure always leads to Pressure losses, which must be compensated by a corresponding dimensioning of the suction unit.
Des Weiteren sind aus der
Bei diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Fördern, Transportieren und Dosieren von Schüttgut beispielsweise Strahlmittel, Schweißpulver, Beschichtungsmittel o. dgl., beim Bearbeiten, Verbinden oder Beschichten von Flächen mittels Vakuumsaugstrahlen bereitzustellen, in dem das Fördern, Transportieren und Dosieren ausschließlich im Unterdruck unter gleichzeitiger Vereinfachung der Verfahrensabläufe und der Baugruppen für den Vorratsbehälter und der Dosierung, der Erhöhung der Betriebssicherheit und Einsparung von Kosten möglich wird.In this prior art, the present invention seeks to provide a method and apparatus for conveying, transporting and dosing of bulk material, for example abrasive, welding powder, coating agent o. The like., When working, bonding or coating surfaces by means of vacuum suction, in the the conveying, transporting and dosing only in the negative pressure while simplifying the procedures and the assemblies for the reservoir and the dosage, increasing the reliability and cost savings is possible.
Diese Aufgabe wird durch ein Verfahren der eingangs genannten Gattung mit den Merkmalen des Anspruchs 1 und durch eine Vorrichtung mit den Merkmalen des Anspruchs 5 gelöst.This object is achieved by a method of the type mentioned with the features of claim 1 and by an apparatus having the features of
Vorteilhafte Ausgestaltungen des Verfahrens und der Vorrichtung sind den Unteransprüchen entnehmbar.Advantageous embodiments of the method and the device are the dependent claims.
Die erfindungsgemäße Lösung geht von der Erkenntnis aus, den Dosiervorgang in den Unterdruckbereich zu verlegen, so dass das Fördern, Transportieren und Dosieren des Strahlmittels innerhalb eines vollständig unter Unterdruck gehaltenen Kreislaufs durchgeführt werden kann.The solution according to the invention is based on the knowledge of laying the dosing process in the vacuum range, so that the conveying, transporting and dosing of the blasting agent can be carried out within a completely held under negative pressure circuit.
Dies wird dadurch erreicht, dass mit einem in einen Entnahmebereich der Schüttgutschüttung eintauchendes Injektions-Dosierrohr ein Saugstrom zur Entnahme und Dosierung des Strahlmittels erzeugt wird, wobei die Schüttung des Schüttgutes im Entnahmebereich durch einen aus der Saugluft der Abscheideeinheit entnommenen Luftstrom aufgelockert wird, der mit einem über ein im Anströmkegel der Abscheideeinheit angeschlossenes Staurohr in den Entnahmebereich gelenkt wird.This is achieved in that a suction flow for removal and metering of the blasting agent is produced with a submerged in a removal area of the bulk bed injection metering, wherein the bulk of the bulk material is loosened in the removal area by an extracted from the suction air of the separation unit air flow, with a is directed into the removal area via a pitot tube connected in the inflow cone of the separation unit.
Von besonderem Vorteil ist, dass die Schüttguttschüttung auf einem Kegelboden im Vorratsbehälter gelagert wird, in dessen rohrartig, bodenseitig geschlossenen Entnahmebereich das Schüttgut durch die Schwerkraft zusammengeführt und die Schütthöhe über dem Entnahmebereich nahezu einen Maximalwert annimmt, wobei der vom Injektions-Dosierrohr erzeugte Saugstrom zur Entnahme und Dosierung des Strahlmittels in diesen Bereich gelenkt wird. Der Entnahmebereich ist durch die über ihm angeordnete Schüttgutschüttung durch ein ausreichend großes Polster aus Schüttgut gegenüber der Abscheideeinheit abgeschottet, wodurch zwei unterschiedlich hohe Unterdruckbereiche innerhalb des Vorratsbehälters nebeneinander sicher funktionieren können.It is particularly advantageous that the bulk material bed is stored on a conical bottom in the reservoir, in the tube-like, closed bottom removal area, the bulk material brought together by gravity and the bed height above the sampling area almost a maximum value, wherein the suction flow generated by the injection metering tube for removal and dosage of the blasting agent is directed in this area. The removal area is sealed off from the separation unit by the bulk material bulk disposed 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.
In einer bevorzugten Ausführungsvariante des erfindungsgemäßen Verfahrens wird die Schüttgutschüttung im Entnahmebereich durch einen atmosphärischen Fremdluftstrom aufgelockert, der von außen mit einem Fluidisierungsrohr oder durch eine dem Entnahmebereich zugeordnete Luftzutrittsbohrung in den Entnahmebereich gelenkt wird.In a preferred embodiment of the method according to the invention, the bulk material bed in the removal area is loosened up by an atmospheric stream of external air, which is supplied from the outside to a fluidizing pipe or through a discharge pipe Air admission hole is directed into the removal area.
In weiterer Ausgestaltung des erfindungsgemäßen Verfahrens wird der Unterdruck am Injektions-Dosierrohr auf Werte zwischen 30 bis 350 mbar, vorzugsweise 200 mbar und der Unterdruck im Vorratsbehälter bzw. der Strahlhaube auf >400 mbar, vorzugsweise 150 bis 250 mbar, eingestellt. Diese Druckdifferenz ist ausreichend, um das Strahlmittel mit dem Injektions-Dosierrohr aus dem Entnahmebereich der Strahlmittelschüttung zu entnehmen und entsprechend feinfühlig in den Transportstrom zu dosieren.In a further embodiment of the method according to the invention, 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.
Von besonderem Vorteil ist weiterhin, dass die Druckdifferenz zwischen Strahllanze und Injektions-Dosierrohr durch einen mit Überdruck betriebenen Injektor in der Schlauchzuleitung aufrechterhalten wird, so dass gewährleistet ist, dass auch bei langen Schlauchzuleitungen das Injektions-Dosierrohr funktionsfähig bleibt.It is furthermore of particular advantage that the pressure difference between jet lance and injection metering tube is maintained in the hose feed line by an injector operated with excess pressure, so that it is ensured that the injection metering tube remains functional even with long hose feed lines.
Das erfindungsgemäße Verfahren ist variabel einsetzbar. So kann es überall dort zum Einsatz gebracht werden, wo Bearbeitungsvorgänge mit dem Vakuumsaugstrahlen durchgeführt werden, beispielsweise zum Entfernen von Lackfehlstellen aus Lackierungen, Entgraten, Glätten von Lötund Schweißnähten, Abtragen von kontaminierten Betonschichten oder Rostschichten, Härten, Einebnen oder Beschichten von Metallflächen, Verbinden durch Schweißen, Bohren und Abisolieren von Solarzellen usw.The method according to the invention can be used variably. Thus, it can be used everywhere where machining operations are performed with the vacuum suction blasting, for example, for removing paint defects from painting, deburring, smoothing solder and welds, removal of contaminated concrete layers or rust layers, hardening, leveling or coating of metal surfaces, connecting through Welding, drilling and stripping of solar cells etc.
Die Aufgabe wird weiterhin durch eine Vorrichtung dadurch gelöst, dass zum Dosieren und Fördern des Schüttgutes ein in das Innere der Schüttgutschüttung im Vorratsbehälter eintauchendes, einen Entnahmebereich der Schüttung erfassendes Injektions-Dosierrohr zum Ansaugen eines mindestens unter Atmosphärendruck oder Unterdruck stehenden Luftstromes vorgesehen ist, wobei in den Entnahmebereich ein an den Anströmkegel der Abscheideeinheit angeschlossenes Staurohr zum Zuführen eines Luftstromes aus der Unterdruckatmosphäre im Vorratsbehälter zwecks Auflockerung der Schüttgutschüttung im Entnahmebereich geführt ist, und wobei das Injektions-Dosierrohr abströmseitig mit der Injektions-Strahllanze durch die Schlauchzuleitung verbunden ist, in der ein mit Überdruck betriebener Zusatzinjektor zur Aufrechterhaltung einer Druckdifferenz zwischen Injektor-Strahllanze und Injektions-Dosierrohr vorgesehen ist.The object is further achieved by a device in that for dosing and conveying the bulk material into the interior of the bulk bed in the reservoir immersion, a discharge area of the bed detecting injection metering tube is provided for sucking at least under atmospheric pressure or negative pressure air stream, wherein in the removal area connected to the Anströmkegel the separation unit pitot tube for supplying an air flow from the vacuum atmosphere in the reservoir for the purpose of loosening the bulk bed in the removal area is guided, and wherein the injection metering tube is connected downstream with the injection jet through the hose inlet, in which a operated with positive pressure additional injector to maintain a pressure difference between the injector jet lance and injection metering tube is provided.
In weiterer Ausgestaltung der erfindungsgemäßen Vorrichtung weist der Vorratsbehälter einen Kegelboden zur Auflagerung des Schüttgutes auf, der in seinem tiefsten Punkt in einen rohrförmigen, durch einen Boden abgeschlossen Entnahmebereich übergeht, im dem das Schüttgut der Schüttung durch Schwerkraft fokussierend zusammenläuft und die Schüttung über dem Entnahmebereich eine nahezu maximale Schütthöhe besitzt, wobei das Injektions-Dosierrohr mit seiner Saugöffnung in den Entnahmebereich zum Ansaugen und Dosieren von Schüttgut geführt ist.In a further embodiment of the device according to the invention, the reservoir has a conical bottom for bearing the bulk material, which merges at its lowest point in a tubular, completed by a bottom removal area in which the bulk of the bed by gravity focusing converges and the bed above the removal area a has almost maximum dumping height, the injection metering tube is guided with its suction opening in the removal area for sucking and dosing of bulk material.
Ein weiteres bevorzugtes Merkmal der erfindungsgemäßen Vorrichtung sieht vor, dass das Injektions-Dosierrohr eine Ansaugöffnung aufweist, die mit der Atmosphärenluft außerhalb des Vorratsbehälters in Verbindung steht und deren Größe durch einen Schieber verstellbar ist.Another preferred feature of the device according to the invention provides that the injection metering tube has a suction opening, which is in communication with the atmospheric air outside the reservoir and whose size is adjustable by a slider.
In einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung kann das Injektions-Dosierrohr aber auch vollkommen innerhalb des Vorratsbehälters angeordnet sein. In diesem Falle steht die Ansaugöffnung des Injektions-Dosierrohres mit der Unterdruckatmosphäre im Vorratsbehälter in Verbindung.In a further embodiment of the The device according to the invention, however, can also be arranged completely within the storage container. In this case, the suction port of the injection metering tube communicates with the negative pressure atmosphere in the reservoir.
Das Injektions-Dosierrohr kann bezüglich des Entnahmebereiches eine beliebige Einbaulage, vorzugsweise einen Winkel von 20° zur Behälterachse einnehmen, so dass je nach den anlagentechnischen Voraussetzungen das Injektions-Dosierrohr horizontal, vertikal oder in einer Winkellage angeordnet sein kann.With regard to the removal area, the injection metering tube can assume any desired installation position, preferably an angle of 20 ° to the container axis, so that the injection metering tube can be arranged horizontally, vertically or in an angular position, depending on the plant-specific requirements.
Bei einer weiteren bevorzugten Ausgestaltung der erfindungsgemäßen Vorrichtung ist im Boden des Entnahmebereiches eine mit der Außenatmosphäre in Verbindung stehende Luftzutrittsbohrung vorgesehen, durch die eine gewisse Menge an Fremdluft zur Auflockerung der Strahlmittelschüttung in den Entnahmebereich gelenkt wird.In a further preferred embodiment of the device according to the invention, an air inlet bore communicating with the outside atmosphere is provided in the bottom of the removal area, by means of which a certain amount of external air is directed into the removal area for loosening up the abrasive bulk.
In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung wird ein Fluidisierungsrohr zum Zuführen eines atmosphärischen Luftstromes zwecks Auflockerung des Schüttgutes in die Schüttgutschüttung des Entnahmebereiches geführt. Dies ermöglicht eine exakte Dosierung auch kleinster Mengen und beugt Verstopfungen an der Saugöffnung des Injektions-Dosierrohres vor.In a further preferred embodiment of the apparatus according to the invention, a fluidizing tube for supplying an atmospheric air stream for the purpose of loosening the bulk material is guided into the bulk material bulk of the removal area. This allows an exact dosage of even the smallest amounts and prevents blockages at the suction port of the injection metering tube.
Die erfindungsgemäße Vorrichtung ist einfach und robust im Aufbau und hat den großen Vorteil, dass die Entnahme und Dosierung der Schüttgutmenge direkt aus dem Unterdruckbereich des Vorratsbehälters erfolgen kann, ohne dass eine besondere pneumatische Trennung von Dosierung und Zuführung von Schüttgut erforderlich sind.The device according to 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 carried out directly from the negative pressure region of the reservoir, without that a special pneumatic separation of metering and feeding of bulk material are required.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung unter Bezugnahme auf die beigefügten Zeichnungen.Further advantages and details will become apparent from the following description with reference to the accompanying drawings.
Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.
Es zeigen
-
Fig. 1 ein Funktionsschema des erfindungsgemäßen Verfahrens mit einem Injektions-Dosierrohr, das mit der Außenatmosphäre in Verbindung steht, -
Fig. 2 eine Seitenansicht des Injektions-Dosierrohres in Schnittdarstellung und -
Fig. 3 eine Variante des erfindungsgemäßen Verfahrens, bei dem das Injektions-Dosierrohr mit der Unterdruckatmosphäre im Vorratsbehälters in Verbindung steht, -
Fig. 4a bis 4c Varianten zur Auflockerung der Strahlmittelschüttung im Entnahmebereich.
-
Fig. 1 a functional diagram of the method according to the invention with an injection metering tube, which is in communication with the outside atmosphere, -
Fig. 2 a side view of the injection metering tube in a sectional view and -
Fig. 3 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 shot form in the removal area.
Die
Der Boden 6 des Vorratsbehälters 5 ist als Kegelboden 6a mit einem Öffnungswinkel α zwischen 90 und 120°, vorzugsweise 90°, ausgebildet und besitzt an seinem tiefsten Punkt P in Flucht der Behälterachse E-E einen durch einen Boden 8 geschlossenen rohrförmigen Entnahmebereich 7.The bottom 6 of the
Der Vorratsbehälter 5 wurde vor dem Verschließen durch die Abscheideeinheit 4 mit einer lockeren Schüttung S aus Schüttgut, beispielsweise Korund, Glasbruch, Zirkonsand, Schlacke, Stahl, Stahlguss, Keramik, Schweißpulver usw. gefüllt, das auf dem Kegelboden 6a lagert. Ein Teil des Schüttgutes gleitet durch die Schwerkraft entlang des Kegelbodens 6a ab und füllt den durch den Boden 8 nach außen abgeschlossenen Entnahmebereich 7 mit dem Schüttgut auf, wobei die Schütthöhe SH über dem Entnahmebereich 7 im Wesentlichen einen Maximalwert erreicht.The
In den Entnahmebereich 7 ist ein langgestrecktes Injektions-Dosierrohr 9 geführt, dessen Saugöffnung 10 nahe am Boden 8 des Entnahmebereiches 7 endet. Das Injektions-Dosierrohr 9 durchdringt die Behälterwandung 11 des Vorratsbehälters 5 und ist unter einem Winkel β von >5° (siehe auch
An die abströmseitige Öffnung 13 des Injektions-Dosierrohres 9 ist eine Schlauchzuleitung 30 angeschlossen, die zu einer Injektor-Strahllanze 14 führt, deren Austrittsende 15 in eine Strahlhaube 16 eingeführt ist. Die Ansaugöffnung 17 der Injektor-Strahllanze 14 hat Verbindung zur Außenatmosphäre. Der weitere Aufbau und die Funktionsweise der Injektor-Strahllanze 14 ist im Stand der Technik nach
Von der Strahlhaube 16 führt eine Schlauchableitung 18 zum Vorratsbehälter 5 zurück, wobei die Schlauchableitung 18 etwa in Höhe des Anströmkegels 19 der Abscheideeinheit 4 in den Vorratsbehälter 5 mündet, so dass ein geschlossener Kreislauf für den Trägerluftstrom TLM entsteht, der dafür sorgt, dass im Injektions-Dosierrohr 9, in der Schlauchzuleitung 13, in der Injektor-Strahllanze 14, in der Strahlhaube 16 und der Schlauchabteilung 18 gleichermaßen der im Vorratsbehälter 5 herrschende Unterdruck pUB anliegt, der im Bereich zwischen 30 bis >350 mbar liegen kann.From the
Der Trägerluftstrom TLM fördert über die Ansaugöffnung 12 des Injektions-Dosierrohres 9 einen Luftstrom LD, der einen zusätzlichen Unterdruck pD im Injektions-Dosierrohr 9, d.h. an der Saugöffnung 10 des Injektions-Dosierrohres 9, erzeugt und der das Schüttgut aus dem Entnahmebereich 7 ansaugt. Das Injektions-Dosierrohr 9 ist so ausgelegt, dass es bei einem Unterdruck pD von 60 bis 360 mbar betrieben werden kann, d.h. es muss immer eine Unterdruckdifferenz Δ p zwischen dem Unterdruck pST an der Strahllanze 14 und dem Unterdruck pD am Injektions-Dosierrohr 9 von mindestens 10 mbar zugunsten des Unterdruckes am Injektions-Dosierrohr 9 vorhanden sein, damit das Injektions-Dosierrohr 9 sicher die gewünschte Menge an Schüttgut aus dem Entnahmebereich 7 ansaugen und in den Trägerluftstrom TLM fördern kann.The carrier air flow T LM promotes via the
Die Schütthöhe SH der Schüttgutschüttung erreicht über dem Entnahmebereich 7 im Wesentlichen ein Maximum, so dass das Schüttgut im Vorratsbehälter 5 eine ausreichende Barriere gegenüber dem Unterdruck pUB im restlichen Vorratsbehälter 5 bildet. Mit anderen Worten, der Entnahmebereich 7 ist durch das Schüttgut abgeschottet, so dass der mit dem Injektions-Dosierrohr 9 aufgebrachte, gegenüber dem Unterdruck pUB im Vorratsbehälter 5 höhere Unterdruck pD ausreicht, um das Strahlmittel aus dem Entnahmebereich sicher zu entnehmen.The bed height SH of the bulk bed reaches above the
Je nach Art und Form des Schüttgutes lässt sich durch die Regulierung der Menge des Luftstroms LD am Injektions-Dosierrohr 9 in Abhängigkeit des an der Injektions-Strahllanze 14 herrschenden Unterdruckes pUST die Menge des angesaugten Schüttgutes entsprechend einstellen.Depending on the type and shape of the bulk material can be adjusted by regulating the amount of air flow L D at the
Das Innenrohr 21 ist gegenüber dem Außenrohr 20 kürzer und endet vor der im Außenrohr 20 angeordneten Saugöffnung 10. Beide Rohre 20 und 21 sind in einer Hülse 22 fixiert. Am abströmseitigen Ende 13 des Außenrohres 20 befindet sich die Ansaugöffnung 12 zum Ansaugen des Luftstromes LD, deren Größe entsprechend der gewünschten Dosiermenge an anzusaugenden Schüttgut durch einen Schieber 23 eingestellt werden kann. Das saugseitige Ende 24 des Außenrohrs 20 ist durch einen unter einem Winkel von beispielsweise 35° abgekanteten Deckel 25 verschlossen.The
Die Saugöffnung 10 des Injektions-Dosierrohres 9 befindet sich parallel zur Längsachse B-B des Außenrohres in der Mantelfläche des Außenrohres 20, so dass einer Verstopfung der Saugöffnung 10 durch Schüttgut entgegengewirkt wird.The
Je nach Art des Schüttgutes kann das Außenrohr 20 und Innenrohr 21 des Injektions-Dosierrohres 9 aus Edelstahl, Keramik oder anderen verschleißfesten Materialien bestehen.Depending on the nature of the bulk material, the
In der
Der Ablauf und die Funktionsweise des erfindungsgemäßen Verfahrens entsprechen dann weiter der im Abschnitt [0032] dargestellten Weise. Es muss nur sichergestellt werden, dass der Druckunterschied Δp in den Unterdrücken zwischen Injektions-Dosierrohr 9 und Injektions-Strahllanze 14 eine entsprechende Größenordnung erreicht. Dies kann beispielsweise mit einem zusätzlich in die Schlauchzuleitung 30 eingesetzten Injektor 29 unterstützt werden, der mit Überdruck betrieben wird.The sequence and the mode of operation of the method according to the invention then further correspond to the manner shown in section [0032]. It must only be ensured that the pressure difference Δ p in the sub-pressures between
Die
Dies kann -wie in
Die
Alle Varianten gewährleisten gleichermaßen eine ausreichende Auflockerung der Schüttgutschüttung im Entnahmebereich 7, so dass mit dem Injektions-Dosierrohr 9 die entsprechende Menge an Schüttgut sicher entnommen werden kann.All variants equally ensure adequate loosening of the bulk material bed in the
Es versteht sich, dass das Injektions-Dosierrohr 9 innerhalb und außerhalb des Vorratsbehälters 5 eine beliebige Einbaulage bezüglich des Entnahmebereiches 7 aufweisen kann. So kann das Injektions-Dosierrohr 9 horizontal, vertikal oder aber auch unter einem Winkel β von beispielsweise 10° zur Behälterachse E-E angeordnet sein.
Claims (11)
- A method for conveying and metering bulk material, for example blasting medium, welding powder, coating agent or the like, during machining, joining or coating of surfaces by means of vacuum suction blasting, in which the bulk material is kept ready in a reservoir (5) placed under vacuum (puB) by a suction unit (2), the bulk material is conveyed therefrom via a hose line (3) to an injection blasting lance (14), accelerated therein by an atmospherically aspirated outside air stream and directed onto a machining surface (1) kept under vacuum (puB) by a blasting cap, aspirated from the blasting cap (16), then fed to a separation unit (4) for cleaning purposes and conveyed back into the reservoir (5), such that the bulk material may be recirculated, characterised in that a suction stream for removing and metering the bulk material is produced using an injection metering tube (9) immersed in a removal region (7) of the bulk material, the bed being loosened in the removal region (7) by an air stream (LA) removed from the suction air of the separation unit (4), which air stream (LA) is directed into the removal region (7) using a stagnation tube (28) connected in the inlet cone (19) of the separation unit (4).
- A method according to claim 1, characterised in that the bulk material is stored on a conical floor (6a) in the reservoir (5), in the tubular removal region (7), closed at the bottom, of which the bulk material is brought together by gravity and the filling level (SH) adopts virtually a maximum value over the removal region (7), the suction stream for removing and metering the bulk material and produced by the injection metering tube (9) being directed into this region.
- A method according to claim 1, characterised in that the bed of bulk material in the removal region (7) is loosened by an atmospheric outside air stream (LF), which is directed into the removal region (7) from outside using a fluidising tube (27) or through an air inlet bore (26) associated with the removal region (7).
- A method according to claim 1, characterised in that the vacuum (puST) at the injection metering tube (9) is set to values between 60 and >360 mbar, preferably 200 mbar, and the vacuum in the reservoir (5) or the blasting cap (14) is set to 50 to 350 mbar.
- A device for carrying out the method according to claim 1, having at least one reservoir (5) for accommodating loose bulk material, a separation unit (4) for cleaning the bulk material, a suction unit (2) connected to the separation unit (4) for producing a vacuum (puB) in the reservoir (5), a hose feed line (13) connected to the reservoir (5) for conveying the bulk material into an injection blasting lance (14) guided to a blasting cap (16) placed under vacuum (puB) for acceleration of the bulk material by an atmospheric air stream (LST) aspirated by the injection blasting lance (14) in the direction of a machining surface (1) and a hose discharge line (18) connected to the blasting cap (16) for aspirating the bulk material and the removed particles out of the blasting cap (16) into the separation unit (4), characterised in that, for metering and conveying of the bulk material, an injection metering tube (9) immersed in the bulk material bed in the reservoir (5) and coming into contact with a removal region (7) of the bed is provided for aspirating an air stream at least under atmospheric pressure or vacuum, a stagnation tube (28) connected to the inlet cone (19) of the separation unit (4) being guided into the removal region (7) to feed an air stream (LA) from the vacuum atmosphere in the reservoir (5) for the purpose of loosening the bulk material bed in the removal region (7), and the injection metering tube (9) being connected at the downstream end with the injection blasting lance (14) by the hose feed line (13), in which an additional injector (29) operated at overpressure is provided to maintain a pressure difference (Δp) between injection blasting lance (14) and injection metering tube (9).
- A device according to claim 5, characterised in that the reservoir (5) comprises a conical bottom (6a) for bearing the bulk material bed, which bottom merges at its lowest point (P) with a tubular removal region (7) closed by a bottom (8), in which removal region (7) the bulk material of the bulk material bed runs together in a focussed manner due to gravity and the bulk material bed has a virtually maximum filling level (SH) over the removal region, the injection metering tube (9) being guided with its suction opening (10) into the removal region (7) for aspirating and metering the bulk material.
- A device according to claim 5, characterised in that the injection metering tube (9) comprises an aspiration opening (12) which communicates with the atmospheric air outside the reservoir (5) and the size of which is adjustable by a slide (23).
- A device according to claim 5, characterised in that the injection metering tube (9) comprises an aspiration opening (12), which communicates with the vacuum atmosphere of the reservoir (5).
- A device according to claim 5, characterised in that the injection metering tube (5) exhibits any desired installation position with regard to the removal region (7), preferably an angle (β) of 10° to the reservoir axis (E-E).
- A device according to claim 5, characterised in that in the bottom (8) of the removal region (7) an air inlet bore (26) in communication with the external atmosphere is arranged for loosening the bulk material bed of the removal region (7).
- A device according to claim 5, characterised in that a fluidising tube (27) for supplying an atmospheric air stream (LF) is guided into the bulk material bed of the removal region (7) for the purpose of loosening the bulk material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010020691 DE102010020691B4 (en) | 2010-05-17 | 2010-05-17 | Method and device for conveying and metering bulk material during vacuum suction blasting |
PCT/DE2011/001082 WO2012019576A1 (en) | 2010-05-17 | 2011-05-16 | Method and device for conveying and metering bulk material in vacuum suction blasting |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2571657A1 EP2571657A1 (en) | 2013-03-27 |
EP2571657B1 true EP2571657B1 (en) | 2015-04-29 |
Family
ID=44859676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20110735773 Active EP2571657B1 (en) | 2010-05-17 | 2011-05-16 | Method and device for conveying and metering bulk material in vacuum suction blasting |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2571657B1 (en) |
DE (1) | DE102010020691B4 (en) |
DK (1) | DK2571657T3 (en) |
WO (1) | WO2012019576A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3096591A1 (en) * | 2015-05-22 | 2016-11-23 | GP Anlagenbau GmbH | Method and device for reducing an electrostatic charge during the machining, joining or coating of areas using vacuum suction blasting |
WO2017059935A1 (en) * | 2015-10-09 | 2017-04-13 | Audi Ag | Method for machining a surface of a component |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3146933B1 (en) * | 2015-09-22 | 2019-11-20 | Ferton Holding S.A. | Powder chamber for an air-polishing device and air-polishing device |
DE102020104689A1 (en) | 2020-02-21 | 2021-08-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Device and method for material removal from fiber composite materials, in particular for shafts |
DE102020118828A1 (en) | 2020-07-16 | 2022-01-20 | Dyemansion Gmbh | Operating a blasting system with control data |
CN214086655U (en) * | 2020-12-23 | 2021-08-31 | 江苏博迁新材料股份有限公司 | Superfine powder suction-type feeding equipment |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4344947A1 (en) * | 1993-12-24 | 1995-08-17 | Klaus Frohne | Manual dust=free grit blasting |
AU3269897A (en) * | 1996-06-27 | 1998-01-14 | Wizard Technology Limited | An abrasive blasting apparatus |
DE19747838C2 (en) * | 1997-10-19 | 2001-07-12 | Gp Granulate Pneumatic Geraete | Method and device for the dry removal of coatings, graffiti or other surface contaminants |
DE10257241B4 (en) * | 2001-01-23 | 2006-08-17 | Pieper Innovationsgesellschaft Mbh | Device, in particular workshop and / or Hobbysystem for processing, in particular vacuum suction of surfaces |
DE10102924C1 (en) | 2001-01-23 | 2002-06-13 | Pieper Innovationsgmbh | Blasting treatment process for hard surfaces involves applying at least one auxiliary energy pulse to blasting medium |
EP2177317A1 (en) * | 2008-10-14 | 2010-04-21 | HRV Engineering GmbH | Abrasive conveyor |
-
2010
- 2010-05-17 DE DE201010020691 patent/DE102010020691B4/en not_active Expired - Fee Related
-
2011
- 2011-05-16 DK DK11735773.1T patent/DK2571657T3/en active
- 2011-05-16 EP EP20110735773 patent/EP2571657B1/en active Active
- 2011-05-16 WO PCT/DE2011/001082 patent/WO2012019576A1/en active Application Filing
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3096591A1 (en) * | 2015-05-22 | 2016-11-23 | GP Anlagenbau GmbH | Method and device for reducing an electrostatic charge during the machining, joining or coating of areas using vacuum suction blasting |
WO2017059935A1 (en) * | 2015-10-09 | 2017-04-13 | Audi Ag | Method for machining a surface of a component |
US10773357B2 (en) | 2015-10-09 | 2020-09-15 | Audi Ag | Method for machining a surface of a component |
Also Published As
Publication number | Publication date |
---|---|
DE102010020691B4 (en) | 2014-09-04 |
WO2012019576A1 (en) | 2012-02-16 |
DK2571657T3 (en) | 2015-08-03 |
DE102010020691A1 (en) | 2011-11-17 |
EP2571657A1 (en) | 2013-03-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE10102924C1 (en) | Blasting treatment process for hard surfaces involves applying at least one auxiliary energy pulse to blasting medium | |
EP2571657B1 (en) | Method and device for conveying and metering bulk material in vacuum suction blasting | |
DE102016109212A1 (en) | Powdering of a rapid prototyping component | |
EP2864056B1 (en) | Device for conveying coating powder from a powder container | |
EP0668406B1 (en) | Method and device for sucking underwater soil | |
EP2019209B1 (en) | Device and method for feeding substances | |
DE3508132A1 (en) | METHOD AND DEVICE FOR FEEDING POWDERED MATERIAL | |
DE3518833C2 (en) | ||
CH687593A5 (en) | Powder spray coating. | |
DE4423254A1 (en) | Pneumatic conveying device for powder, in particular coating powder | |
EP2477751A1 (en) | Method and device for conveying and distributing powders in a gas stream | |
DE19614555A1 (en) | Abrasive blasting device for model workpiece | |
DE10257241B4 (en) | Device, in particular workshop and / or Hobbysystem for processing, in particular vacuum suction of surfaces | |
EP3552714B1 (en) | Powder conveyor for conveying coating powder, method for producing the powder conveyor and powder centre with the powder conveyor for supplying a powder coating installation | |
DE102006005209A1 (en) | Vacuum lance for powder coating system has devices for feeding fluidizing air into suction head with air outlet openings on outer surface facing away from powder inlet opening | |
EP0900164A1 (en) | Process and device for avoiding product dust or product gas emission when decanting with solid or liquid dosage systems | |
DE3246761C2 (en) | ||
DE10261053A1 (en) | Procedure for pneumatic transporting of powder form material entails charging gas permeable filter element in region of end facing chamber outlet with underpressure, and in region of end facing inlet charging with compressed gas | |
CH692143A5 (en) | Method for avoiding dust and gas emissions when decanting fluids and solids | |
DE102011018562A1 (en) | Apparatus for cleaning system in form of dryer outlet of vehicle bodies, has supply unit and discharge unit, which are arranged for generating volume flow of medium for cleaning surface | |
EP1325890B1 (en) | Process to remove an aqueous sludge suspension consisting of shot-blasting abrasives and coatings residuals | |
DE102005051224A1 (en) | Method and device for dosing a liquid | |
DE19736326C1 (en) | Storage container for powder paint installation | |
DE102007011736A1 (en) | Conveying device for conveying powder, particularly powder coating, out of storage container into powder discharge unit, has closed housing, and air permeable fluid base is arranged in housing that is spaced from front side of housing | |
EP0015894B1 (en) | Process for coating the inside of pipes with plastics material and apparatus for carrying out said process |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20121203 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20141211 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 724170 Country of ref document: AT Kind code of ref document: T Effective date: 20150515 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502011006734 Country of ref document: DE Effective date: 20150603 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 Effective date: 20150730 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20150429 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: BOVARD AG, CH |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150831 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150729 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150730 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150829 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502011006734 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: RO Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150429 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20160201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20110516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 724170 Country of ref document: AT Kind code of ref document: T Effective date: 20160516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150516 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150429 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20190507 Year of fee payment: 9 Ref country code: IT Payment date: 20190522 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20190515 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20190627 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20200508 Year of fee payment: 10 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP Effective date: 20200531 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20200516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200531 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200516 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200516 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210531 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210531 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240523 Year of fee payment: 14 |