EP0557720A1 - Méthode et appareil pour enlever une couche superficielle d'un objet - Google Patents

Méthode et appareil pour enlever une couche superficielle d'un objet Download PDF

Info

Publication number
EP0557720A1
EP0557720A1 EP93100977A EP93100977A EP0557720A1 EP 0557720 A1 EP0557720 A1 EP 0557720A1 EP 93100977 A EP93100977 A EP 93100977A EP 93100977 A EP93100977 A EP 93100977A EP 0557720 A1 EP0557720 A1 EP 0557720A1
Authority
EP
European Patent Office
Prior art keywords
container
particles
liquid medium
liquid
surface layer
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
EP93100977A
Other languages
German (de)
English (en)
Other versions
EP0557720B1 (fr
Inventor
Bernhard Kaufmann
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.)
KAUFMANN AG
Original Assignee
KAUFMANN AG
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 KAUFMANN AG filed Critical KAUFMANN AG
Publication of EP0557720A1 publication Critical patent/EP0557720A1/fr
Application granted granted Critical
Publication of EP0557720B1 publication Critical patent/EP0557720B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/10—Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
    • E01H1/101—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers
    • E01H1/103—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers in which the soiled loosening or washing liquid is removed, e.g. by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
    • E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges

Definitions

  • the present invention relates to a method and a device according to the preamble of claims 1 and 13, respectively.
  • the present invention has for its object to provide a method and an apparatus of the type mentioned, which have no environmental impact; and neither during the removal of a surface layer nor during disposal.
  • the expression “pressure jet of a liquid, aqueous medium” denotes a high-speed jet emerging from a nozzle, the medium flowing to the nozzle under a pressure of at least 400 bar, preferably at 2,000 to 3,000 bar.
  • Corrosion protection coatings are generally metal-containing, for example zinc, lead, titanium, etc.
  • the invention enables the metal-containing protective layer residues to be completely collected and sent to smelting or refining to recover the metal.
  • the water used to remove the protective layer can be transported from site to site and only needs to be renewed to the extent that evaporation losses occur.
  • zinc-containing protective layers which is the rule in steel structures, the water almost reaches the end of the treatment Drinking quality and could, if desired, be derived from any normal wastewater treatment plant.
  • the reference numerals 1 denote the pillars of a bridge, on which cross-sectionally double-T-shaped side members 2 are placed. These are connected at regular intervals by cross-section 3, which is also double-T-shaped in cross section, and carry a bridge plate 4.
  • the old protective layer is removed by an operator 5 by means of a movable nozzle 6 subjected to a high-speed water jet and removed or machined until the bare metallic base body is exposed.
  • the operator 5 (or a robot performing his function), the nozzle 6 operated by him and the section of the carrier 2, 3 to be freed of the protective layer are located within a fixed, transportable, removable and / or movable cabin 7 or other housing, which is closed on all sides to the extent that none emerges from the nozzle 6 or from the carriers 2, 3 dripping or splashing water can escape into the environment unintentionally.
  • the floor 8 of the cabin 7 is impermeable to water and has at least one collecting shaft 9 and is inclined towards this collecting shaft in such a way that all the water occurring within the cabin 7 runs together therein.
  • the inherently stable, self-supporting floor 8 is suspended from the longitudinal beams 2 by means not shown and / or is displaceable or displaceable thereon, similar to the trolley of a gantry crane.
  • the side walls of the cabin 7 are formed by plastic foils extending from the floor 8 to the underside of the bridge plate 4, so that the bridge plate 4 closes the cabin 7 at the top.
  • the water converging in the collecting shaft 9 and loaded with particles of the removed protective layer is conveyed by means of a pump 10 through a line 11 into a water treatment plant 13 on the bridge plate 4 and is regenerated there, as described later.
  • the regenerated water flows from there (13) via a line 12 into a high-pressure pump 14, which drives it back to the working nozzle 6 under a pressure of approximately 2,000 bar.
  • the cabin 7, the nozzle 6, the lines 11, 12, the pumps 10, 14 and the water treatment system 13 thus form a loss-free water cycle (apart from evaporation losses).
  • FIG. 2 shows an example of a water treatment plant 13. It has two coarse cleaning containers 15, 16, four settling silos 17 to 20, two collecting tanks 21, 22 and a buffer tank 23. There is also a flocculation station 24 with which a flocculant, such as aluminum sulfate, can be added to the loaded water.
  • a flocculant such as aluminum sulfate
  • the two coarse cleaning containers 15, 16 are of identical design. They essentially consist of a tub 25 and a basket insert 26, which is smaller than the tub 25 and leaves a space 27 on all sides to the tub wall. A sieve-like baffle 28 halfway up the tub prevents greater turbulence within the tub 25 while the dirty water is flowing in.
  • the trough 25 is provided with an outlet 29 which can be shut off by a ball valve and is connected to a pipe or hose line 30.
  • the four serially arranged settling silos 17 to 20 are also of identical design, which is why the structure is described below by only one.
  • a pipe socket 32 projecting axially into the silo is attached to the silo cover, with which currents and turbulence in the water contained in the silo are to be suppressed.
  • a flat shower screen 33 is attached to the pipe socket 32, onto which the water poured into the silo is poured, then distributed over the silo cross-section and falls into the silo in the manner of a wide, finely structured shower jet.
  • the silo 17 also has an inflow and an outflow line 34 and 35, the latter of which can be closed by means of a ball valve.
  • the inflow line 35 ends above the shower screen 33.
  • the inlet opening of the outflow line 35 is located between the shower sieve 33 and the funnel-shaped silo bottom and thus lies in the zone of low particle concentration, since the load of the dirty water collects on the silo bottom through sedimentation as so-called sludge. From there, the sludge is periodically discharged by opening the outlet 31 and collected in a container 36.
  • the two open basins 21 and 22 are divided by a filter wall 39 into an inlet and an outlet side 37 and 38, respectively.
  • the filter wall 39 serves the purpose of retaining any impurities that are floating in the water circuit, such as dead insects or the like, with a grain size of more than 0.005 millimeters in order to protect the nozzle 6.
  • the buffer tank 23 serves to compensate for water losses in the circuit, which are caused by evaporation or by the discharge of the sludge from the silos 17 to 20.
  • the water treatment plant 13 shown in FIG. 2 functions as follows.
  • Water splashing against the foil walls of the cabin 7 or the bridge plate 4 is also discharged onto the floor 8, where it runs into the collecting shaft 9 and from the pump 10 into the rough cleaning containers 15 and 16 is pumped.
  • Coarse particles of the protective layer are retained there in the basket inserts 26.
  • the water freed from the coarse freight is conveyed by means of a pump 40 via the inflow line 34 into the first settling silo 17 and this is filled up to a level near the shower screen 33 and kept at this level by an automatic control device.
  • the particles carried in the water settle due to gravity, so that a zone 41 with a large particle concentration and above it a zone 42 with a low particle concentration form.
  • the sludge collecting in zone 41 is discharged from time to time through outlet 31, whereas the at least partially purified water from zone 42 is pumped by pump 43 into second settling silo 18, where the same process as in settling silo 17 takes place repeated.
  • the water further clarified in the settling silo 18 is fed to the settling silo 19 - a further sedimentation or cleaning stage - by means of a pump 44, from where it is conveyed into the last fine cleaning stage (settling silo 20) by means of a pump 45. From there, the completely cleaned water reaches the collecting basins 21 and 22 and flows from them back to the high-pressure pump 14. Any water losses are compensated for by the buffer pool. Automatic level control ensures a constant bath height in all settling silos 17 to 20.
  • the cargo (or protective layer particles) sedimenting in the various cleaning stages referred to as sludge, is, as already mentioned with reference to the settling silo 17, collected in container 36 by opening the outlet 31.
  • the predominantly zinc-containing sludge is allowed to air dry in the containers 36.
  • a high-zinc granulate is formed from which the zinc can be recovered by smelting or other refining in a zinc smelter.
  • 46 aluminum sulfate as a flocculant can exceptionally be metered into the water circuit by means of a metering device. This increases the settling speed of the particles in the individual cleaning stages.
  • the rough cleaning containers 15, 16 can suffice. Under certain circumstances, they can also be omitted. However, more than two such containers can also be set up in parallel. Likewise, the number of settling silos 17 to 20 and the collection basins 21, 22 is determined by the required performance.
  • Both the coarse cleaning containers 15, 16 and the settling silos 17 to 20 or the collecting basins 21 and 22 or the buffer basin 23 are designed as independent, transportable structural units which can be transported from one place of use to other vehicles by means of normal road transport vehicles. Accordingly, the lines shown with easy-to-use coupling means among themselves or with Inlets or outlets of the settling silos 17 to 20 or the rough cleaning containers 15, 16 or. the pool 21, 22 connectable. This means that the lengths of the lines between the individual cleaning stages can be varied and the system elements can be installed wherever there is space available. In other words, the water treatment system 13 shown in FIG. 2 can be installed partially or entirely up to several hundred meters from the place of use of the nozzle 6.
  • FIG. 3 and 4 show a robot which can replace the operator 5 symbolically represented in FIG. 1.
  • a guide rod 48 which is displaceable in the direction of the Z axis, is mounted vertically on a frame 47 which can be moved in the direction of the X and Y axes.
  • a slide 49 which is longitudinally displaceable (ie displaceable in the direction of the X axis), carries the nozzle 6, which can be pivoted about the X axis in a pivot bearing arranged thereon.
  • the movements of the frame 47, the guide rod 48, the carriage 49 and the nozzle 6 can be carried out automatically or by remote control by means of drive and control elements, not shown.
  • nozzle wheel rotary nozzle
  • several nozzles which is rotatably mounted about its axis and to which the rotary movement is induced by the reaction force of the nozzles.
  • zinc-containing corrosion protection layers instead of zinc-containing corrosion protection layers, other metal-containing (eg Pb or Ti) protective layers can also be used the process described are removed and recycled.
  • Pb or Ti metal-containing
  • the slightly corroded surfaces are cleaned using the sandblasting principle, using aluminum oxide, i.e. aluminum oxide, as the blasting grain.
  • the grains bouncing off the surface to be cleaned are collected, cleaned of oxide and corundum dust and fed to the jet nozzle again and again until they are unusable in a closed circuit.
  • the oxide and corundum dust filtered out from the blasting agent is an excellent additive in cement production and can be used industrially there without any environmental impact.
  • the rounded over time and therefore unusable corundum grains can be deposited in any place outdoors without any disadvantage, since they chemically correspond to the alumina (Al2O3).
  • a slight negative pressure is generated in the cabin 7 by means of a fan, as a result of which iron oxide dust is prevented from escaping into the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP93100977A 1992-02-28 1993-01-22 Méthode et appareil pour enlever une couche superficielle d'un objet Expired - Lifetime EP0557720B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH630/92A CH684465A5 (de) 1992-02-28 1992-02-28 Verfahren und Einrichtung zum Entfernen einer Oberflächenschicht von einem Körper.
CH630/92 1992-02-28

Publications (2)

Publication Number Publication Date
EP0557720A1 true EP0557720A1 (fr) 1993-09-01
EP0557720B1 EP0557720B1 (fr) 1997-03-12

Family

ID=4191489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100977A Expired - Lifetime EP0557720B1 (fr) 1992-02-28 1993-01-22 Méthode et appareil pour enlever une couche superficielle d'un objet

Country Status (4)

Country Link
EP (1) EP0557720B1 (fr)
AT (1) ATE149926T1 (fr)
CH (1) CH684465A5 (fr)
DE (1) DE59305680D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004049305B4 (de) * 2004-10-07 2009-06-10 Rolando Daniel Camacho Vorrichtung zur Durchführung von Malerarbeiten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538539A1 (de) * 1985-10-30 1987-05-07 Joachim Dipl Ing Meier Fahrbare vorrichtung zur reinigung insbesondere von fahrbahnen
EP0318074A1 (fr) * 1987-11-27 1989-05-31 A. Hak International B.V. Dispositif de nettoyage de pistes d'envol
US4890567A (en) * 1987-12-01 1990-01-02 Caduff Edward A Robotic ultrasonic cleaning and spraying device for ships' hulls
US5011710A (en) * 1988-11-10 1991-04-30 Harrison John F Bridge maintenance method and equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317720A (en) * 1980-09-18 1982-03-02 Hawk Eugene D Cleaning fluid recovery apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538539A1 (de) * 1985-10-30 1987-05-07 Joachim Dipl Ing Meier Fahrbare vorrichtung zur reinigung insbesondere von fahrbahnen
EP0318074A1 (fr) * 1987-11-27 1989-05-31 A. Hak International B.V. Dispositif de nettoyage de pistes d'envol
US4890567A (en) * 1987-12-01 1990-01-02 Caduff Edward A Robotic ultrasonic cleaning and spraying device for ships' hulls
US5011710A (en) * 1988-11-10 1991-04-30 Harrison John F Bridge maintenance method and equipment

Also Published As

Publication number Publication date
ATE149926T1 (de) 1997-03-15
CH684465A5 (de) 1994-09-30
DE59305680D1 (de) 1997-04-17
EP0557720B1 (fr) 1997-03-12

Similar Documents

Publication Publication Date Title
EP2324086B1 (fr) Procédé de séparation de pertes de peinture à la pulvérisation et fluide de séparation associé
EP1861205B1 (fr) Installation pour la peinture d'objets
EP0654294B1 (fr) Procédé et dispositif de filtration de particules solides de liquides et le rinçage du filtre à contre-courant
DE3207279A1 (de) Verfahren und vorrichtung zum reinigen von becken
EP1591244A2 (fr) Procédé et dispositif pour nettoyer l'eau de mouillage d'une machine d'impression
DE102008064043A1 (de) Lackiervorrichtung und Verfahren zu deren Betrieb
DE2352733A1 (de) Verfahren und einrichtung zur oberflaechenbehandlung von metallischen oder nichtmetallischen teilen, insbesondere von blechen
EP0740110A2 (fr) Procédé et appareil pour le traitement de résidus solides de combustion d'une installation de combustion, notamment d'un incinérateur
EP1051360B1 (fr) Procede de traitement d'eau de circulation provenant d'une installation de mise en peinture
DE2748840A1 (de) Vorrichtung und verfahren zum elektrostatischen aufspruehen von pulver, insbesondere von emaille
EP0557720B1 (fr) Méthode et appareil pour enlever une couche superficielle d'un objet
EP0787686A2 (fr) Procédé et dispositif pour le traitement d' eau usée provenant des installations de lavage de vehicules
DE4335104C2 (de) Verfahren und Vorrichtung zum Filtern von Quellwasser
EP3565927B1 (fr) Véhicule de nettoyage pour tunnel
EP1312419B1 (fr) Dispositif et procédé de nettoyage des caillebotis dans les cabines de peinture
DE2427841B2 (de) Naßarbeitender Elektroabscheider zum Entfernen von Verunreinigungen aus heißen Abgasen
AT403878B (de) Vorrichtung und verfahren zum reinigen von dachflächen
EP0072388A1 (fr) Procédé et dispositif pour l'élimination ou plutôt l'élimination partielle des souillures contenues dans une eau courante à chute
EP0105225B1 (fr) Procédé de nettoyage d'un élément de filtration pour les substances liquides et du dispositif de séparation renfermant cet élément
DE4127975C2 (fr)
EP0962263A2 (fr) Procédé et installation pour enlever des revêtements dangereux
DE102011018562A1 (de) Vorrichtung zur Reinigung einer Anlage und Anlage mit einer Reinigungsvorrichtung
AT524960B1 (de) Mobile abwasseraufbereitungsvorrichtung
EP0625382A1 (fr) Procédé et dispositif pour séparer l'huile de mélanges d'huile avec des matières solides
DE2911903C2 (de) Verfahren und Vorrichtung zum Entwässern von körnigem Schüttgut, insbesondere von Schlacke

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR NL

17P Request for examination filed

Effective date: 19940124

17Q First examination report despatched

Effective date: 19950315

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR NL

REF Corresponds to:

Ref document number: 149926

Country of ref document: AT

Date of ref document: 19970315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59305680

Country of ref document: DE

Date of ref document: 19970417

ET Fr: translation filed
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

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980122

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19981211

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981223

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19990131

Year of fee payment: 7

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 NON-PAYMENT OF DUE FEES

Effective date: 20000801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000929

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST