EP2419241A1 - Procédé et installation de traitement de surface par jets de fluide cryogénique - Google Patents
Procédé et installation de traitement de surface par jets de fluide cryogéniqueInfo
- Publication number
- EP2419241A1 EP2419241A1 EP10716393A EP10716393A EP2419241A1 EP 2419241 A1 EP2419241 A1 EP 2419241A1 EP 10716393 A EP10716393 A EP 10716393A EP 10716393 A EP10716393 A EP 10716393A EP 2419241 A1 EP2419241 A1 EP 2419241A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dry gas
- gearbox
- tool
- fluid
- transmission
- 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
Links
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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/001—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements incorporating means for heating or cooling, e.g. the material to be sprayed
-
- 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
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
Definitions
- the invention relates to an installation and a method of working by jets of cryogenic fluid under high pressure, in particular surface treatment, pickling or peeling, coated or uncoated materials, such as metals, concrete, wood , polymers and plastics or any other type of material.
- the surface treatment of coated or uncoated materials is essentially by sanding, by projection of ultra high pressure water (UHP), sander, jackhammer , at the shredder or by chemical means.
- UHP ultra high pressure water
- cryogenic jets under very high pressure as proposed by US-A-7,310,955 and US-A-7,316,363.
- one or more jets of liquid nitrogen are used at a pressure of 1000 to 4000 bar and at a cryogenic temperature of, for example, between -100 and -200 ° C., typically about -140 and -160 ° C., which are distributed by a nozzle-carrying tool which is set in motion, typically a rotational or oscillatory movement obtained, by a gear or belt system driven by a motor.
- the gearbox usually containing the set of gears is never perfectly sealed and can not be made completely tight because of the presence of moving parts passing through its wall, as well as the expansion of parts and Pressure variations induced by significant temperature changes that occur during the use of the installation.
- Some applications can generate a lot of dust that also tends to get in and accumulate in the gearbox and the pinions or gears, which also tends to prevent again the rotation of the gears and therefore the movement of the tool nozzle holder. As before, this accumulation of dust generates mandatory stops to clean the box.
- the judgments can be curative, that is to say when a problem arises, or preventive, that is to say before the problem arises, when one knows for example of experience that after a given time, it is better to stop maintenance to avoid any problem.
- the problem to be solved is therefore to avoid or minimize these contaminations by ambient impurities, such as water vapor or dust, the gearless transmission gearbox or other internal mechanism of an installation cryogenic jet working under very high pressure, in particular a surface treatment plant, stripping, descending or the like.
- the solution then relates to a working installation using at least one cryogenic fluid jet under high pressure comprising:
- a source of cryogenic temperature fluid fluidically connected to a moving tool;
- the mobile tool comprising one or more fluid distribution nozzles for dispensing one or more jets of said fluid at cryogenic temperature under high pressure, and
- the motor being connected to the moving tool via a transmission shaft and a gearbox with a transmission mechanism, said transmission axis penetrating inside the gearbox and cooperating with the transmission mechanism arranged in said gearbox so as to transmit the rotational movement of the motor to the moving tool.
- the installation of the invention is characterized in that it further comprises means for supplying dry gas in fluid communication with the inside of the box. transmission designed to and capable of supplying the inside of said transmission gearbox with dry gas.
- the installation of the invention may comprise one or more of the following features: the mobile tool is mobile in rotation or in oscillation.
- the transmission mechanism comprises one or more gears or belts.
- the dry gas supply means comprise a source of dry gas in fluid communication with the inside of the transmission box,
- the means for supplying dry gas comprise a source of dry nitrogen or of dry air,
- At least one heat exchanger comprising an exhaust device, in particular a vent, arranged between the source of cryogenic temperature fluid and the rotary tool, the dry gas supply means being fluidly connected to said device; exhaust so as to recover at least a portion of the gas escaping from said exhaust system,
- the source of cryogenic temperature fluid is a tank containing a cryogenic liquid surmounted by a gas head, the means for supplying dry gas being connected fluidly to said gas head of the source of fluid at cryogenic temperature.
- the invention also relates to a method for avoiding or minimizing the contamination by atmospheric impurities of the inside of a transmission box of a working installation, in particular according to the invention, characterized in that a dry gas is introduced. inside the transmission box, said dry gas containing less than 20% by volume of water vapor and being at a pressure greater than or equal to atmospheric pressure.
- the method of the invention may include one or more of the following features:
- the dry gas is at a pressure greater than atmospheric pressure, preferably at a pressure greater than 1 bar and less than or equal to 400 bar,
- the dry gas is air or nitrogen, preferably nitrogen originating from another stage of the process or constituting a gas-waste of the installation, the dry gas is nitrogen from the exhaust system of a heat exchanger of the installation and / or the gas head of the source of cryogenic fluid,
- the cryogenic fluid dispensed by the nozzle (s) of the tool is at a pressure of at least 1000 bar, preferably between 2000 and 5000 bar, and at a temperature below 140 ° C., preferably between approximately 140 ° C. and -180 0 C, atmospheric impurities are water vapor and solid particles carried by the air, in particular dust, and the residues generated.
- the flow rate of the dry gas supplying the inside of the gearbox is between 0.1 and 100 l / min, preferably between 1 and 10 l / min.
- the invention also relates to a method for surface treatment, pickling or peeling, of a cryogenic fluid material at high pressure, in which an installation according to the invention or a method is implemented. to avoid or to minimize the contamination by atmospheric impurities of the gearbox interior of an installation according to the invention.
- FIG. 1 schematizes the operation of a working installation using cryogenic jets under very high pressure
- FIGS. 2a side view
- 2b view from below
- Figure 3 shows schematically the drive mechanism of the tool-bearing bus equipping the installation of Figure 1, and
- FIG. 4 schematizes an embodiment according to the present invention for preventing the entry of water vapor or atmospheric dust into the housing of the mechanism of FIG. 3.
- a pickling, surface treatment or the like by jets of cryogenic liquid usually comprises a storage tank 1, such as a tank, of liquid nitrogen (hereinafter referred to as LN 2 ) which feeds, via a supply line 6 of liquid nitrogen under low pressure, that is to say at about 3 to 6 bar and at a temperature of about -180 0 C, a compression device 2 , with compressor and internal upstream heat exchanger for ultra-high pressure (UHP) liquid nitrogen.
- LN 2 liquid nitrogen
- UHP ultra-high pressure
- the compression device 2 thus allows compression of the LN 2 from the storage tank 1.
- the LN 2 at the first pressure (UHP) is then conveyed via a conveying line (7) to an external downstream heat exchanger 3 where the LN2 UHP is cooled with liquid nitrogen at atmospheric pressure (at 9 ° C.). ), to typically obtain UHP liquid nitrogen.
- LN2 at a pressure (UHP) typically greater than 1000 bar, generally between 2000 bar and 5000 bar, advantageously between about 3000 and 4000 bar, and at a temperature below -140 0 C, typically between -140 0 C and - 180 0 C, for example of the order of about -150 to -160 0 C, which is sent (in 8) to the pickling tool 4 or the like delivering one or more jets of liquid nitrogen UHP, in general several jets.
- UHP pressure
- the tank 1 of large capacity such as a truck tank or a storage tank of several thousand liters of liquid nitrogen, is generally located outside buildings, that is to say in the open air. It can be fixed or mobile.
- the tank 1 of large capacity is connected in a conventional manner to the installation, that is to say by means of insulated piping comprising one or more control valves ...
- the conveying of the LN 2 between the various elements The system is also done via insulated pipes.
- the overall gas flow is approximately 20 1 / min or 15 m / min.
- the compression device 2, the external exchanger 3 and especially the tool 4 are in principle located in one or more buildings.
- This exhaust gas nitrogen is via an exhaust device, such as a vent or the like, arranged on each of said heat exchangers 2, 3.
- this released nitrogen is not reused but is usually collected and evacuated from buildings to eliminate the risk of anoxia of the personnel, that is to say that it constitutes a gas-waste which is evacuated to the atmosphere.
- a tool 4 equipped with nozzles 11 of the type used in UHP waterjet processes, but fed here by LN 2 UHP (in 8) and which is rotated or oscillated so as to obtain rotary jets 12 LN 2 UHP which are used to etch (or equivalent) the surface to be treated, such as illustrated in Figures 2a (side view) and Figure 2b (bottom view).
- the tool 4 is carried here in rotation by a set of pinions 24, with or without a transmission belt, driven by an electric or pneumatic motor 21 via a first rotary shaft or transmission shaft 22 connected to the engine 21, a gearbox, a housing or a transmission enclosure 23 comprising an internal gearset transmission mechanism 24 and a second shaft or rotary transmission axis 25 connected in turn to the mobile tool 4 provided with the nozzles.
- the gearbox 23 containing the gearset transmission mechanism 24 or the like is never perfectly sealed. Indeed, having a sealed box 23 would be difficult, even almost impossible, especially due to the expansion of the parts and pressure variations induced by significant temperature variations, when using the installation, namely the passage from room temperature to cryogenic temperatures, creating interstices.
- this non-sealing gearbox 23 containing the gearset transmission mechanism 24 poses problems in the installations of the prior art because it allows the entry of atmospheric impurities, in particular water vapor and various dusts within said transmission box 23 via said interstices.
- FIG 4 is similar to Figure 3, except that, according to the invention, the transmission box 23 is supplied with dry gas and clean overpressure relative to atmospheric pressure via supply means 28 in dry gas which are in fluid communication with the inside of the gearbox 23.
- the supply means 28 comprise a dry gas supply line fluidly connected to a source of dry gas, preferably dry, clean nitrogen gas or dry clean air, that is to say not containing water vapor, dust or other atmospheric aerosol impurities likely to crystallize, deposit or accumulate in the gearbox 23, in particular in the transmission mechanism.
- a source of dry gas preferably dry, clean nitrogen gas or dry clean air, that is to say not containing water vapor, dust or other atmospheric aerosol impurities likely to crystallize, deposit or accumulate in the gearbox 23, in particular in the transmission mechanism.
- Dry and clean gas whatever its nature, can come from a bottle, a container, a gas tank, a dedicated compressor equipped with filters or any other means of purification of gas, a gas supply pipe or a pipe network.
- the gaseous gas of the tank or tank 1 is advantageously used, but more preferably the waste gas, namely gaseous nitrogen, discharged via the vents of the upstream exchanger 2 or the downstream exchanger 3. the installation of Figure 1.
- the dry clean gas is introduced into the transmission box 23 at overpressure relative to the atmospheric pressure, that is to say at a pressure greater than 1 bar (1 atm).
- the pressurized gas introduced into the gearbox 23 then occupies the internal volume of the gearbox 23 and part of the gas escapes (arrows 29), due to its overpressure, via the interstices inevitably present within the wall of the gearbox 23 due to the impossibility of obtaining a complete seal of the gearbox 23.
- the rotating shaft or transmission shaft 22 and the feed line 8 in UHP cryogenic fluid enter the transmission box 23 containing the pinions 24, and the rotary shaft or shaft driving the tool 4 comes out. of said transmission box 23.
- the wall of the transmission box 23 comprises orifices allowing the passage of the aforementioned axes and lines that can not be completely sealed, even if seals or other sealing means are used, since all or part of these mechanical parts are movable, in particular the rotary shafts 22, 25. This is also true when the tool 4 is driven by an oscillating movement.
- the atmospheric impurities which are at ambient atmospheric pressure, are then prevented from being able to penetrate inside the transmission box 23 because of the pressure difference created between the inside and the outside of the box or box 23.
- the dry gas used for this contains less than 20% by volume of water vapor and is therefore at a pressure greater than the ambient atmospheric pressure prevailing outside the box or chamber 23.
- the dry gas used has a content of water is zero or almost zero and contains no dust.
- the aim is in fact to avoid mainly the entry of dust and water vapor.
- it is possible to prevent or at least considerably slow down the entry of any gaseous or aerosol compounds that may be problematic when they accumulate in box 23, for example CO 2 which could solidify in dry ice in the box 23 and pose the same problems as the water vapor that crystallizes in ice.
- the invention therefore also relates to these other potentially harmful impurities.
- the dry gas can be purified before its injection into the box 23, for example filtered or by an adsorption system, for example by passing over particles of alumina type adsorbent, zeolite, silica gel or Similar.
- the present invention is applicable in any operation of thermal treatment by jets of cryogenic fluid, in particular of surface treatment, pickling or peeling, of a material, such as metals, concrete, stone, plastics, wood etc.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0952464A FR2944461B1 (fr) | 2009-04-15 | 2009-04-15 | Procede et installation de traitement de surface par jets de fluide cryogenique. |
PCT/FR2010/050464 WO2010119201A1 (fr) | 2009-04-15 | 2010-03-16 | Procédé et installation de traitement de surface par jets de fluide cryogénique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2419241A1 true EP2419241A1 (fr) | 2012-02-22 |
EP2419241B1 EP2419241B1 (fr) | 2014-04-30 |
Family
ID=41066163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10716393.3A Not-in-force EP2419241B1 (fr) | 2009-04-15 | 2010-03-16 | Procédé et installation de traitement de surface par jets de fluide cryogénique |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120031994A1 (fr) |
EP (1) | EP2419241B1 (fr) |
CN (1) | CN102395446B (fr) |
FR (1) | FR2944461B1 (fr) |
WO (1) | WO2010119201A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2983106B1 (fr) * | 2011-11-24 | 2014-01-10 | Air Liquide | Dispositif de distribution de jets de fluide cryogenique a chambre de tranquillisation |
JP2014011373A (ja) * | 2012-07-02 | 2014-01-20 | Tokyo Electron Ltd | 半導体検査システム及びインターフェース部の結露防止方法 |
US8743052B1 (en) * | 2012-11-24 | 2014-06-03 | Eric Jeffrey Keller | Computing interface system |
JP2015020096A (ja) * | 2013-07-17 | 2015-02-02 | 株式会社Ihi | 液化ガス噴射装置及び液化ガス洗浄装置 |
CN106073265A (zh) * | 2016-06-03 | 2016-11-09 | 阜南县黄岗利达工艺品有限公司 | 一种复古柳编座椅的编织工艺 |
CN108554936A (zh) * | 2018-04-08 | 2018-09-21 | 苏州珮凯科技有限公司 | 半导体8寸晶元薄膜制程的e-max工艺的石英零部件的再生方法 |
MX2021002055A (es) * | 2018-08-21 | 2021-05-27 | Hermetik Hydraulik Ab | Un dispositivo y metodo para la descalcificacion de material rodante. |
CN109968215B (zh) * | 2019-04-16 | 2020-07-31 | 南京航空航天大学 | 一种低温微磨料气射流加工机床专用控制系统 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3830078A (en) * | 1970-03-24 | 1974-08-20 | Us Air Force | Anti-frost apparatus |
FR2576821B1 (fr) * | 1985-02-04 | 1987-03-27 | Carboxyque Francaise | Installation pour la projection de particules de glace carbonique |
US4993200A (en) * | 1986-03-11 | 1991-02-19 | Kawasaki Steel Techno-Research Corp | Pollution free blaster system and blaster head therefor |
DE4240991A1 (de) * | 1992-12-05 | 1994-06-09 | Plasma Technik Ag | Plasmaspritzgerät |
US5794854A (en) * | 1996-04-18 | 1998-08-18 | Jetec Company | Apparatus for generating oscillating fluid jets |
ES2318891T3 (es) * | 1998-04-17 | 2009-05-01 | Toyo Seikan Kaisha, Ltd. | Procedimiento y dispositivo de fabricacion de un cuerpo de envasado a presion positiva. |
DE19923103A1 (de) * | 1999-05-20 | 2000-11-30 | Juergen Von Der Ohe | Vorrichtung zum Reinigen von Innenflächen |
DE19936698C1 (de) * | 1999-08-04 | 2000-12-21 | Continental Ag | Vorrichtung zur Reinigung von Vulkanisationsformen |
DE20308788U1 (de) * | 2003-06-04 | 2003-08-28 | Univ Hannover | Oberflächenbearbeitungsvorrichtung |
US7310955B2 (en) * | 2004-09-03 | 2007-12-25 | Nitrocision Llc | System and method for delivering cryogenic fluid |
-
2009
- 2009-04-15 FR FR0952464A patent/FR2944461B1/fr not_active Expired - Fee Related
-
2010
- 2010-03-16 WO PCT/FR2010/050464 patent/WO2010119201A1/fr active Application Filing
- 2010-03-16 CN CN201080016581.8A patent/CN102395446B/zh not_active Expired - Fee Related
- 2010-03-16 EP EP10716393.3A patent/EP2419241B1/fr not_active Not-in-force
- 2010-03-16 US US13/264,077 patent/US20120031994A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2010119201A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20120031994A1 (en) | 2012-02-09 |
CN102395446A (zh) | 2012-03-28 |
WO2010119201A1 (fr) | 2010-10-21 |
FR2944461A1 (fr) | 2010-10-22 |
EP2419241B1 (fr) | 2014-04-30 |
FR2944461B1 (fr) | 2011-05-20 |
CN102395446B (zh) | 2014-04-16 |
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