EP2609409A1 - Procédé de contrôle d'étanchéité - Google Patents

Procédé de contrôle d'étanchéité

Info

Publication number
EP2609409A1
EP2609409A1 EP11757797.3A EP11757797A EP2609409A1 EP 2609409 A1 EP2609409 A1 EP 2609409A1 EP 11757797 A EP11757797 A EP 11757797A EP 2609409 A1 EP2609409 A1 EP 2609409A1
Authority
EP
European Patent Office
Prior art keywords
water
coating
indicator
mixture
generator
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.)
Ceased
Application number
EP11757797.3A
Other languages
German (de)
English (en)
Inventor
Werner Grosse Bley
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.)
Inficon GmbH Deutschland
Original Assignee
Inficon GmbH Deutschland
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 Inficon GmbH Deutschland filed Critical Inficon GmbH Deutschland
Publication of EP2609409A1 publication Critical patent/EP2609409A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/421—Safety arrangements for preventing water damage
    • A47L15/4212—Detection of water leaks; Collection of leaked water, e.g. in the casing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/34—Other automatic detections
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/26—Indication or alarm to the controlling device or to the user

Definitions

  • the invention relates to a method for leak testing of water-bearing components.
  • DE 10 2007 032 250 B3 describes a device for detecting liquid leaks, which has a large-area electrically non-conductive surface element on which strip conductors are located. At the tracks there is an electrical voltage. By measuring the electrical Resistance is detected when there is a drop of liquid on the sheet.
  • the invention has for its object to provide a method for leak testing, which is easy to carry out and in which the generator material can be easily adapted to different geometries.
  • a coating of a mixture of a water-soluble base material and a generator material is used for leak testing.
  • a mixture can be applied very simply as a liquid or paste, hardening and then firmly adhering to the supporting component until contact with water destroys the cohesion of the coating and releases the indicator.
  • the indicator can then be detected with a leak detector.
  • the coating can be applied by brushing or trowelling and then hardening. It adapts to any geometries of the support structure. It can be applied to potentially leaking aquifers. Even without an enclosing housing so that a leak at which a drop of water emerges, be immediately detected and located by the C0 2 development at the place of emergence by Gasschnüffellecksuche in a known manner.
  • Another variant provides that below the water-bearing Komponen ⁇ th a pad is provided, which is provided with the coating. In both variants, it is also possible to visually recognize where the leak is located, because where the drop of water falls or emerges, the coating is visibly dissolved.
  • the coating consists of a homogeneous mixture.
  • the basic material is polyethylene glycol (PEG).
  • PEG is a water-miscible and water-soluble, non-toxic polymer in every proportion.
  • PEG is given together with a numerical value indicating the average molecular weight.
  • PEG is liquid with a molecular mass of> 400.
  • PEG 600 has a paste-like consistency and PEG ⁇ 3000 are solid substances.
  • a mixture of sodium and citric acid or tartaric acid is suitable. These are organic or inorganic acids in solid (crystalline) form, so that they can be stirred into the anhydrous carrier substance PEG without reacting with the sodium bicarbonate.
  • the PEG is made warm (about 50 ° C), so that without addition of water, soda, acid and PEG can be mixed, so that no reaction takes place.
  • the invention further relates to a coating material for the leak test of water-conducting components with the features of claim 5.
  • Fig. 1 shows the representation of a housing of a washing machine during the
  • Fig. 2 shows a cross section through the pad
  • Fig. 3 a variant in which an arbitrarily designed component with a
  • FIG. 1 shows a housing 10 which contains components 11 to be tested for leaks.
  • components 11 include, for example, a tub 110, which is connected via a Ein Albanyrohr 111 with a Ein Hamptonkasten 112, which in turn is connected to a water inlet 113.
  • the components include a tub vent pipe 114 connecting the tub 110 to the dispenser 112, and a water drain 115 having a drain 116 at the top and connected to a drain pump 117 at the bottom.
  • the lye container 110 is a sensor 118 for the level control and a radiator seal 119, the tightness is also checked. All parts 110-119 form Kom ⁇ components 11 that are to be subjected to leak testing.
  • These components are contained in the inner space 12 of the housing 10, which contains an atmosphere corresponding to the ambient air.
  • the housing 10 surrounds the interior 12 from all sides, but an absolute gas seal of the interior is not required. It is important that the interior is a gas volume contains, which is delimited from the environment of the housing 10, so that a befind Anlagen in the interior 12 indicator material can be detected.
  • the sensor 13 To detect the indicator is a sensor 13 which is connected via a line 14 to the interior 12.
  • the sensor 13 includes a suction pump (not shown) that draws gas from the housing 10 and discharges it to the ambient atmosphere.
  • the sensor is for example of the HLD5000 type from INFICON GmbH. This is an infrared cuvette.
  • the leak test should show whether small amounts of water in the form of droplets escape from the components 11.
  • a measurement of the humidity in the housing 10 would not be sufficiently sensitive or would take too long time.
  • Drops 15 that drip down through a water leak 16 of the component 11 fall to the bottom 17 and burst there.
  • a base 18 which may consist of a flexible film and carries a coating 19 on its upper side.
  • the structure of the pad 18 and the coating 19 is shown in Fig. 2.
  • Advantageous is a convection of the atmosphere in the interior 12 by a blower or by a drive of the washing machine drum (not shown).
  • FIG. 3 shows one of the components 11 to be tested, which is a tube 20.
  • the tube 20 is surrounded by a coating 19 which contains the generator material.
  • Detecting the leak by C0 2 developing at the leak occurs with a sniffer leak detector 22 responsive to the indicator gas CO 2 having a hand-held sniffer tip 23.
  • the sniffer tip 23 is connected via a capillary 24 to a base unit 25.
  • the base unit 25 includes a vacuum pump that sucks gas into the sniffer tip 23 and also a sensor that selectively reacts to the indicator.
  • the coating 19 consists of a mixture of a base material, e.g. B. PEG 4000, and a generator material.
  • the generator material consists for example of a stoichiometric mixture of sodium and citric acid or tartaric acid, for. B. in the mixing ratio of 50/50%.
  • the generator material is stirred into the base material.
  • the mixture can be applied to any surface by brushing or trowelling and then adheres firmly there.
  • a rigid base plate can be used or a flexible film.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention concerne le contrôle d'étanchéité d'éléments structuraux acheminant de l'eau. A cet effet, un revêtement (19) contient un mélange composé d'une substance de base hydrosoluble d'une substance génératrice. Au contact de l'eau, le revêtement (19) libère un gaz indicateur qui est détecté par un capteur (13).
EP11757797.3A 2010-08-26 2011-08-22 Procédé de contrôle d'étanchéité Ceased EP2609409A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010035432A DE102010035432A1 (de) 2010-08-26 2010-08-26 Verfahren zur Dichtheitsprüfung
PCT/EP2011/064406 WO2012025500A1 (fr) 2010-08-26 2011-08-22 Procédé de contrôle d'étanchéité

Publications (1)

Publication Number Publication Date
EP2609409A1 true EP2609409A1 (fr) 2013-07-03

Family

ID=44653273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11757797.3A Ceased EP2609409A1 (fr) 2010-08-26 2011-08-22 Procédé de contrôle d'étanchéité

Country Status (5)

Country Link
US (1) US20130167618A1 (fr)
EP (1) EP2609409A1 (fr)
JP (1) JP2013536029A (fr)
DE (1) DE102010035432A1 (fr)
WO (1) WO2012025500A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005494A1 (de) * 2009-11-27 2011-06-01 Inficon Gmbh Verfahren zur Dichtheisprüfung von wasserführenden Komponenten in einem Gehäuse
DE102015222586A1 (de) * 2015-11-16 2017-05-18 BSH Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine und Geschirrspülmaschine
CN114018497B (zh) * 2016-06-30 2024-03-26 株式会社开滋 阀用耐压检查装置和其检查方法、以及氢气检测单元
DE102020000907A1 (de) * 2020-02-13 2021-08-19 Daimler Ag Detektion einer Leckage eines Kühlkreislaufs
US11913855B2 (en) 2021-06-03 2024-02-27 Caterpillar Inc. Multi-layer hose with tracer material

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506509A1 (fr) * 1981-05-20 1982-11-26 Labo Electronique Physique Appareil electromenager du genre lave-linge ou lave-vaisselle avec dispositif d'alarme en cas de debordement ou fuite d'eau
JPS62108122A (ja) * 1985-11-07 1987-05-19 Tokyu Constr Co Ltd 建物躯体表面の漏水検知層付き防水構造
FR2769580B1 (fr) * 1997-10-09 1999-12-31 Lacroix Soc E Dispositif de leurrage a l'encontre des torpilles a remontee de sillage
US6063632A (en) * 1998-11-12 2000-05-16 Perkins; Gary Water leak detection
GB2369707A (en) * 2000-11-29 2002-06-05 Malcolm David Warner Domestic flood prevention device
JP2005146549A (ja) * 2003-11-12 2005-06-09 Mym Corp 洗面化粧台，流し台における漏水検知装置
JP4589783B2 (ja) * 2005-03-31 2010-12-01 富士通株式会社 浸水インジケータ及び浸水インジケート方法
DE102007032250B3 (de) 2007-07-11 2008-12-18 ROWO Coating Gesellschaft für Beschichtung mbH Vorrichtung zum Detektieren von Flüssigkeitslecks
DE102010005494A1 (de) 2009-11-27 2011-06-01 Inficon Gmbh Verfahren zur Dichtheisprüfung von wasserführenden Komponenten in einem Gehäuse

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2012025500A1 *

Also Published As

Publication number Publication date
DE102010035432A1 (de) 2012-03-01
JP2013536029A (ja) 2013-09-19
WO2012025500A1 (fr) 2012-03-01
US20130167618A1 (en) 2013-07-04

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