EP2123402A1 - Dispositif de rayonnement de glace sèche - Google Patents

Dispositif de rayonnement de glace sèche Download PDF

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Publication number
EP2123402A1
EP2123402A1 EP09006604A EP09006604A EP2123402A1 EP 2123402 A1 EP2123402 A1 EP 2123402A1 EP 09006604 A EP09006604 A EP 09006604A EP 09006604 A EP09006604 A EP 09006604A EP 2123402 A1 EP2123402 A1 EP 2123402A1
Authority
EP
European Patent Office
Prior art keywords
dry ice
chamber
ice blasting
emptying
conveying element
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
EP09006604A
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German (de)
English (en)
Other versions
EP2123402B1 (fr
Inventor
Ralf Schick
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP2123402A1 publication Critical patent/EP2123402A1/fr
Application granted granted Critical
Publication of EP2123402B1 publication Critical patent/EP2123402B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • 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
    • B24C7/0092—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed by mechanical means, e.g. by screw conveyors

Definitions

  • the invention relates to a dry ice blasting apparatus for producing a mixture of propellant gas and dry ice granules, comprising a reservoir for dry ice granules and an inlet, to which a propellant gas supply line is connectable, and an outlet which is in fluid communication with the inlet via a conveyor and to which an outlet conduit to Output of a mixture of propellant gas and dry ice granules can be connected, wherein the conveying device for introducing dry ice granules from the reservoir into the flow path of the propellant gas has a motor-driven conveying element with at least one delivery chamber which is aligned in a first position of the conveying element with an outlet of the reservoir and in a second position of the conveying element is arranged in the flow path between the inlet and the outlet.
  • Such dry ice blasting apparatus are known from DE 10 2004 045 770 B3 known.
  • a surface with a mixture of propellant gas, preferably compressed air, and dry ice granules are irradiated. This makes it possible, for example, to clean the surface, because impurities adhering to the surface are strongly cooled when exposed to dry ice granules and become brittle thereby, so that then the adhesion of the impurities is very low.
  • the falling on the surface of dry ice granules sublimated upon impact that is, it goes directly from the solid to the gaseous phase, thereby dissolving the adhering to the surface impurities.
  • the dry ice granules which are stored in the form of so-called pellets in the reservoir, are introduced into the flow path of the propellant gas between the inlet and the outlet, so that it mixes with the propellant gas.
  • the conveyor has a movable by a motor conveyor element with at least one delivery chamber. This is aligned in a first position of the conveying element in alignment with the outlet of the storage container so that dry ice granules can pass from the storage container into the delivery chamber.
  • the conveying chamber In a second position of the conveying element, the conveying chamber is arranged in the flow path between the inlet and the outlet and the dry ice granules received in the first position from the reservoir can mix with the propellant gas and subsequently reach the outlet of the dry ice blasting device.
  • an output line can be connected, which carries at its free end a dispensing device, such as a blasting gun with a jet nozzle, so that a jet consisting of compressed air and dry ice granules can be directed to a surface to be cleaned.
  • dry ice granules can be introduced into the storage tank, which gradually empties during the operation of the dry ice blasting machine. If the operation of the dry ice blasting device is interrupted for some time, for example for more than 30 minutes, when the storage container is still completely or partially filled, then it is advisable to empty the storage container, otherwise there is a risk that the dry ice granules will form lumps due to the humidity. This must be avoided, since otherwise a further operation of the dry ice blasting device is not trouble-free possible, since then the one another connected pellets no longer readily go into the at least one delivery chamber of the conveyor.
  • Object of the present invention is to provide a dry ice blasting device of the type mentioned in such a way that before interrupting the operation of the dry ice blasting device dry ice granules can be removed in a simple manner from the reservoir and also from the conveyor.
  • the conveyor has at least one discharge opening and the conveying element is movable to a discharge position in which the at least one delivery chamber is aligned with the discharge opening.
  • both the storage container and the conveying device can be emptied in a simple manner, since the conveying element can be moved into an emptying position, in which the at least one delivery chamber is aligned with a discharge opening. About the discharge opening the dry ice granules removed from the reservoir can be removed.
  • the conveyor element in its emptying position, so that dry ice granules can be removed through the discharge opening. In this way, the entire reservoir can be emptied within a short time and moreover, all the dry ice granules located in the conveyor can be removed. It is not necessary to move the reservoir, but only the conveying element is moved, for which purpose the conveying element can also be used in normal operation of the dry ice blasting device driving motor.
  • the emptying position may coincide with the first or second position of the conveying element, wherein it is then necessary to close the emptying opening during normal operation of the dry ice blasting device, so that dry ice granules can not easily pass from the reservoir to the emptying opening.
  • a flap or a slide can be used, which releases the discharge opening only when a desired emptying of the reservoir.
  • the dry ice granules may then be pressureless, i. without use of the propellant gas - be taken out via the discharge opening.
  • the emptying position is preferably a third position of the conveying element that is different from the first and second positions.
  • the conveying element can then be repeated from the first Position are moved to the third position, so that during each movement process dry ice granules can be removed from the reservoir and discharged through the discharge opening.
  • the conveying element can be moved directly from its first position into the third position without first having to assume a second position for this purpose.
  • the risk is avoided that dry ice granules on the way from the first to the third position inadvertently reaches the level of the second position in the region of the flow path of the propellant gas and icy this area.
  • Closing members for preventing access to the flow path of the propellant gas during emptying can be omitted.
  • the conveying element is movable from its first position by moving in a first direction of movement into its second position and starting from its first position by moving in a second direction of movement into its third position.
  • the conveying element of the conveyor can be moved in different directions.
  • the conveying element is moved starting from its first position, in which the at least one conveying chamber is aligned with the outlet of the reservoir, in a first direction of movement in which it passes from the first position to the second position.
  • the conveyor element can be moved from its first position in a second direction of movement, so that it reaches its third position in which the at least one delivery chamber is aligned with the discharge opening, taken over the dry ice granules can be.
  • the first and second directions of movement of the conveying element are opposite to each other.
  • a conveying device for example, a screw conveyor can be used which promotes the dry ice granules from the outlet of the reservoir in the flow path of the propellant gas between the inlet and the outlet of the dry ice blasting device when moving in a first direction of movement and when moving in the opposite direction the dry ice granules from the reservoir to Emptying opening promotes.
  • the conveying element is preferably rotatable about an axis of rotation.
  • the at least one delivery chamber can be rotated starting from a position aligned with the outlet of the reservoir into a position in which dry ice granules received from the reservoir can enter the flow path of the propellant gas. If the storage container and the conveyor are emptied, then the conveyor element can be rotated by a different angle of rotation, so that the dry ice granules received from the reservoir can be removed via the discharge opening.
  • the direction of rotation of the conveying element is reversible.
  • the conveying element can thus be rotated in the clockwise direction and in the counterclockwise direction.
  • the conveying element is rotated in a first direction of rotation, and for emptying the reservoir and the conveyor, the conveying element is rotated in the opposite direction of rotation.
  • the conveyor element can be configured, for example, as a rotatably mounted conveyor disc. This preferably has a plurality of delivery chambers, so that with continuous rotation of the conveyor disc continuously conveying chambers are transferred from a aligned with the outlet of the reservoir rotational position in a rotational position in which the dry ice granules can be mixed with the propellant gas. For emptying can be provided a further rotational position in which the delivery chambers are aligned with the discharge opening.
  • the at least one delivery chamber is configured as an opening of the delivery disc.
  • the conveyor disc may have an upper side and a lower side, and the delivery chamber may extend between the upper side and the lower side.
  • the delivery chamber designed as an opening can be introduced into the flow path between the inlet and the outlet of the dry ice jet device, so that the Passage chamber is flowed through by the propellant, which in this case blows out the located in the delivery chamber dry ice granules.
  • the conveyor disc is rotated in the opposite direction, the dry ice granules can pass from the delivery chamber to the discharge opening, which is preferably arranged below the conveyor disc.
  • the conveyor has an inlet chamber located at the outlet of the reservoir, an outlet chamber disposed in the flow path between the inlet and the outlet, and an outlet chamber disposed offset from the inlet and outlet chambers Emptying chamber, wherein the at least one delivery chamber in the first position of the conveying element with the input chamber, in the second position of the conveying element with the output chamber and in the third position of the conveying element is aligned with the discharge chamber.
  • dry ice granules can pass from the storage container via the inlet chamber into the conveying chamber of the conveying element.
  • the conveying element is then moved so far that the at least one conveying chamber is aligned with the output chamber of the conveying device, so that the dry ice granules located in the conveying chamber pass into the flow path of the propellant gas. If the storage container and the conveyor are to be emptied, then the conveyor element can be moved to the third position, in which the delivery chamber is aligned with the discharge chamber having the discharge opening, through which the dry ice granules of the dry ice blasting apparatus can be removed.
  • the emptying chamber forms in a preferred embodiment of the invention, a passage, which is arranged in positioning of the conveying element in its third position between the conveying chamber and an emptying device.
  • the emptying device about the emptying device, the dry ice granules of the dry ice blasting device can be removed.
  • the emptying device is preferably arranged below the emptying chamber.
  • the dry ice granules in the third position of the conveying element can automatically reach the emptying device due to its own weight from the conveying chamber via the emptying chamber designed as a passage.
  • the emptying device preferably comprises a chute oriented obliquely to the vertical.
  • a collecting vessel for example a bucket, can be positioned, which receives the dry ice granules taken from the storage container and the conveying device.
  • the conveyor comprises a plate assembly having a top plate and a bottom plate between which the conveyor element is arranged in the form of a motor rotatable about a vertical central axis conveyor disc, the top plate having the input chamber and the bottom plate, the discharge chamber and the output chamber in the top plate or the bottom plate is arranged.
  • the input, output and discharge chamber are arranged at an angle offset from each other.
  • the input chamber defines the first rotational position of the conveyor disc.
  • the conveyor disc moves during normal operation of the dry ice blasting device in a first direction of rotation, so that the dry ice granules can pass from the inlet chamber via the at least one delivery chamber to the output chamber located in the flow path of the propellant gas between the inlet and the outlet. If the storage container and the conveyor are emptied, the conveyor disc is rotated in the opposite direction, so that the received from the input chamber dry ice granules can pass through the at least one delivery chamber to the discharge chamber, from which the dry ice granules of the dry ice blasting device can be removed.
  • an electric motor used to drive the conveying element. This is conveniently for emptying the reservoir for a given discharge duration contrary to its normal operation of the dry ice blasting device prevailing direction of rotation operable. The direction of rotation of the electric motor can thus be reversed. During normal operation, a first direction of rotation of the electric motor is present, and for emptying the reservoir and the conveyor, the electric motor is operated in the opposite direction of rotation.
  • the dry ice blasting device has a programmable control unit which controls the electric motor, it being possible for the control unit to predetermine the emptying duration.
  • the discharge duration may be programmed, for example, during manufacture or assembly of the dry ice blasting apparatus. It is particularly advantageous if the duration of the emptying can be predetermined by the user of the dry ice blasting device by the control unit being correspondingly programmable by the user.
  • the emptying time is at least 1 minute, preferably about 1 to 5 minutes. If the storage container and the conveyor are emptied, the user only has to operate an operating element of the dry ice blasting device, for example a pushbutton, so that the emptying process is then started, the electric motor, for the given emptying period, being counter to it during normal operation of the dry ice blasting device prevailing direction of rotation is operated. Preferably, after the expiration of the default discharge duration of the emptying process can be restarted by pressing the control element. It is favorable if the current emptying process can be stopped prematurely by actuating the operating element.
  • an operating element of the dry ice blasting device for example a pushbutton
  • the emptying process can be manually switched on and off.
  • the emptying process can be switched off manually and controlled by a sensor.
  • a sensor in particular a light barrier, detect the presence of dry ice granules. As long as there is still a corresponding sensor signal, the emptying process can be continued, if no dry ice granules can be detected anymore, the emptying process can be stopped automatically.
  • a dry ice blasting device 10 is shown schematically, wherein for better clarity, a chassis with wheels and a housing have been omitted.
  • a pressurized jet of a mixture of propellant in this case compressed air
  • dry ice granules can be produced.
  • the dry ice blasting apparatus 10 comprises a storage container 12 into which dry ice granules can be introduced.
  • a filling opening 13 which can be closed by a cover, not shown in the drawing.
  • the storage container 12 forms a storage funnel 14, which forms a shaft-like outlet 15 of the storage container 12 on the underside.
  • the dry ice blasting apparatus 10 further includes a conveyor 18 having a plate assembly 20 including a top plate 21 and a bottom plate 22. Between the upper plate 21 and the lower plate 22, a movable conveying element in the form of a conveyor disc 24 is arranged, which is continuously rotatable about a vertically aligned central axis 25. To drive the conveyor disc 24, the conveyor 18 to an electric motor 27 which is coupled via an angle gear 28 to the conveyor disc 24. The control of the electric motor 27 by means of a control unit 30 which is connected to the electric motor 27 and connected via not shown in the drawing signal lines to a control panel (not shown in the drawing) of the dry ice blasting apparatus 10 is connected.
  • the control panel has various operating and display elements, for example, a main switch for switching on and off the dry ice blasting device 10th
  • a propellant gas supply line not shown in the drawing, in the present case, a compressed air supply line can be connected.
  • the dry ice blasting device 10 has an inlet 32.
  • the dry ice blasting device 10 comprises an outlet 34 to which an output line, also not shown in the drawing, can be connected.
  • the output line may have at its free end a device for emitting a jet of compressed air and dry ice granules, for example a Blasting gun with a jet nozzle, so that the jet of compressed air and dry ice granules can be directed onto a surface to be cleaned.
  • the top plate 21 has an entrance chamber 36 designed as a kidney-shaped opening, which is arranged in alignment with the outlet 15 of the storage container 12. Placed to the input chamber 36, the top plate 21 comprises a compressed air passage 37, which is in fluid communication with the inlet 32 via a compressed air line 38. In the compressed air line 38, a filter 39 for the separation of condensation and dirt particles and a pressure control valve 40 are connected in series. The pressure control valve allows regulation of the pressure of the compressed air. In addition, the pressure control valve 40 has the function of a check valve, so that the compressed air supply can be interrupted.
  • the lower plate 22 has in alignment with the compressed air passage 37 to an output chamber 42, to which a connecting pipe 43 connects, via which the output chamber 42 is in flow communication with the outlet 34.
  • the lower plate 22 offset to the output chamber 42 has an evacuation chamber 46, which is also kidney-shaped in the form of an opening of the lower plate 22 and defines an emptying opening 48 with its edge.
  • an emptying device 50 is arranged, which is designed in the illustrated embodiment as an obliquely oriented to the vertical slide 51.
  • the arranged between the top plate 21 and the lower plate 22 conveyor disc 24 has a plurality of delivery chambers 54, which are each configured in the form of a cylindrical opening. In the radial direction, the delivery chambers 54 are arranged at the same height as the input chamber 36, the compressed air passage 37, the output chamber 42 and the discharge chamber 46. If the conveyor disc 24 from the electric motor 27 in a first rotational direction, the FIG.
  • FIG. 2 is illustrated by the arrow A, rotated about the central axis 25, so arrive in a first rotational position of the conveyor disc 24 disposed below the input chamber 36 conveying chambers 54 in a second rotational position of the conveyor disc 24 in the area between the compressed air passage 37 and arranged below the output chamber 42, that is, the delivery chambers 54 enter the flow path of the compressed air between the inlet 32 and the outlet 34.
  • the conveyor disc 24 starting from its first rotational position in which the delivery chambers 54 are aligned with the input chamber 36, in the opposite direction, the in FIG. 2 is shown rotated by the arrow B, the conveying chambers 54 reach in a third rotational position of the conveyor disc 24 in a position above the discharge chamber 46.
  • the third rotational position thus forms a discharge position of the conveyor disc 24th
  • dry ice granules previously filled into the hopper 12 via the feed opening 13 can be introduced from the outlet 15 of the hopper 12 via the feed chambers 54 into the compressed air flow path between the inlet 32 and the outlet 34 are introduced, so that the dry ice granules mixed with the compressed air and forms at the outlet 34, a mixture of compressed air and dry ice granules.
  • This mixture can then be directed in a conventional manner to a surface to be cleaned.
  • the dry ice blasting device 10 If the operation of the dry ice blasting device 10 is to be interrupted for some time, for example for more than 30 minutes, then the dry ice granules, which is still in the reservoir 12 and in the delivery chambers 54 of the conveyor 18, are removed.
  • the electric motor is operated for an emptying period of at least 1 minute, preferably for a discharge duration of about 2 minutes, with the opposite direction of rotation, so that the conveyor disc 24 is rotated in the direction of rotation B.
  • control unit 30 For controlling the electric motor 27, the control unit 30 is used. This is programmable in the illustrated embodiment. This gives the possibility to program a predetermined discharge duration, so that the user only has to operate an operating element, for example a push-button, to empty the storage container 12 and the conveyor 18, in order to start the discharge process.
  • the emptying process can be repeatedly started by the user by pressing the respective control element.
  • Programming the Discharge time can be made by the manufacturer, preferably by the user.
  • the emptying process can also be provided that the emptying process, although manually switched on, but then monitored by a sensor.
  • a sensor in the form of a light barrier with a transmitter 56 and a receiver 57 may be arranged on the chute 51, as shown in dotted lines in the drawing.
  • the light barrier dry ice granules located on the chute 51 can be detected.
  • the emptying process can be continued until no more dry ice granules can be detected. Subsequently, the emptying process can be terminated automatically.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
EP09006604A 2008-05-20 2009-05-15 Dispositif de rayonnement de glace sèche Active EP2123402B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008025361A DE102008025361B3 (de) 2008-05-20 2008-05-20 Trockeneisstrahlvorrichtung

Publications (2)

Publication Number Publication Date
EP2123402A1 true EP2123402A1 (fr) 2009-11-25
EP2123402B1 EP2123402B1 (fr) 2011-07-06

Family

ID=40348831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09006604A Active EP2123402B1 (fr) 2008-05-20 2009-05-15 Dispositif de rayonnement de glace sèche

Country Status (4)

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EP (1) EP2123402B1 (fr)
AT (1) ATE515374T1 (fr)
DE (1) DE102008025361B3 (fr)
DK (1) DK2123402T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011088873A1 (fr) 2010-01-21 2011-07-28 Uhde Gmbh Procédé pour fabriquer des produits compactés individuels adaptés à une chambre de coke par division non mécanique d'un tourteau de charbon
CN103894934A (zh) * 2014-04-04 2014-07-02 黄尚进 一种轮毂磨抛机
WO2022101317A1 (fr) * 2020-11-11 2022-05-19 Alfred Kärcher SE & Co. KG Dispositif de nettoyage pour le sablage de surfaces avec un flux mixte constitué de gaz comprimé et de granulés de co2
US11628538B2 (en) 2019-07-02 2023-04-18 National Flooring Equipment, Inc. Valve mount for shot blaster plenum valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2420353A1 (fr) * 2010-08-16 2012-02-22 desisa GmbH Dispositif et procédé destinés au dépôt de glace sèche

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036557A1 (de) * 2000-07-27 2002-02-07 Juergen Von Der Ohe Verfahren und Vorrichtung zum Reinigen von Flächen
US6524172B1 (en) 2000-09-08 2003-02-25 Cold Jet, Inc. Particle blast apparatus
US20030199232A1 (en) * 2002-04-17 2003-10-23 Cold Jet, Inc. Feeder assembly for particle blast system
DE102004045770B3 (de) 2004-09-15 2005-09-08 Alfred Kärcher Gmbh & Co. Kg Trockeneisstrahlvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036557A1 (de) * 2000-07-27 2002-02-07 Juergen Von Der Ohe Verfahren und Vorrichtung zum Reinigen von Flächen
US6524172B1 (en) 2000-09-08 2003-02-25 Cold Jet, Inc. Particle blast apparatus
US20030199232A1 (en) * 2002-04-17 2003-10-23 Cold Jet, Inc. Feeder assembly for particle blast system
DE102004045770B3 (de) 2004-09-15 2005-09-08 Alfred Kärcher Gmbh & Co. Kg Trockeneisstrahlvorrichtung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011088873A1 (fr) 2010-01-21 2011-07-28 Uhde Gmbh Procédé pour fabriquer des produits compactés individuels adaptés à une chambre de coke par division non mécanique d'un tourteau de charbon
DE102010005353A1 (de) 2010-01-21 2011-07-28 Uhde GmbH, 44141 Verfahren zur Herstellung von kokskammergerechten Einzelkompaktaten durch nichtmechanisches Teilen eines Kohlepresskuchens
US8920607B2 (en) 2010-01-21 2014-12-30 Thyssenkrupp Uhde Gmbh Method for producing individual compacts suitable for coke oven chambers by dividing a coal cake in a non-mechanical manner
CN103894934A (zh) * 2014-04-04 2014-07-02 黄尚进 一种轮毂磨抛机
CN103894934B (zh) * 2014-04-04 2016-02-03 黄尚进 一种轮毂磨抛机
US11628538B2 (en) 2019-07-02 2023-04-18 National Flooring Equipment, Inc. Valve mount for shot blaster plenum valve
WO2022101317A1 (fr) * 2020-11-11 2022-05-19 Alfred Kärcher SE & Co. KG Dispositif de nettoyage pour le sablage de surfaces avec un flux mixte constitué de gaz comprimé et de granulés de co2

Also Published As

Publication number Publication date
DK2123402T3 (da) 2011-09-26
DE102008025361B3 (de) 2009-03-19
ATE515374T1 (de) 2011-07-15
EP2123402B1 (fr) 2011-07-06

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