FR2606878A1 - Transformer tank leak detection - Google Patents
Transformer tank leak detection Download PDFInfo
- Publication number
- FR2606878A1 FR2606878A1 FR8616037A FR8616037A FR2606878A1 FR 2606878 A1 FR2606878 A1 FR 2606878A1 FR 8616037 A FR8616037 A FR 8616037A FR 8616037 A FR8616037 A FR 8616037A FR 2606878 A1 FR2606878 A1 FR 2606878A1
- Authority
- FR
- France
- Prior art keywords
- tank
- leak detection
- transformer tank
- ref
- tank leak
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
DETECTION DES FUITES DE CUVES DE TRANSFORMATEUR
Les cuves de transformateur sont actuellement fabriquees par soudure d'éléments de tôle sur une machine appelée positionneur. Apres fabrication, la cuve est transportee sur un second site de travail où elle est remplie d'eau additionnée de fluorescéine et mise sous pression. Les fuites sont décelées par inspection visuelle, la cuve est vidée, la réparation faite et une seconde opération de contrôle identique à la précédente est effectuée. I1 y a en moyenne 5 fuites par cuve.DETECTION OF LEAKS FROM TRANSFORMER TANKS
Transformer tanks are currently manufactured by welding sheet metal elements on a machine called a positioner. After manufacture, the tank is transported to a second work site where it is filled with water added with fluorescein and pressurized. Leaks are detected by visual inspection, the tank is emptied, the repair made and a second control operation identical to the previous one is carried out. There are on average 5 leaks per tank.
Le processus a le double inconvénient d'être onéreux car il exige deux postes de travail successif avec stockage intermédiaire et peu sûr car les très petites fuites ne sont pas décelées.The process has the double disadvantage of being expensive because it requires two successive workstations with intermediate storage and insecure because very small leaks are not detected.
L'appareil selon l'invention permet de déceler même les plus petites fuites et ceci alors que la cuve en fabrication est encore sur le positionneur, ce qui économise un poste de travail.The apparatus according to the invention makes it possible to detect even the smallest leaks and this while the tank in manufacture is still on the positioner, which saves a work station.
L'ensemble de l'appareillage est symbolisé sur le schéma de principe de la figure 1.The entire apparatus is symbolized on the block diagram of Figure 1.
I1 comprend - une sonde de reniflage grossier comportant 3 détecteurs liés d-e manière souple entre eux et permettant l'auscultation de 3 ailettes à la fois (ref. 1 figure 1). It includes - a coarse sniffing probe comprising 3 detectors linked in a flexible manner to each other and allowing the monitoring of 3 fins at a time (ref. 1 FIG. 1).
- une sonde simple permettant de localiser la fuite détectee précédemment avec précision et de contrôler les soudures à plat (bord de cuve, soudures périphériques) (ref. 2 figure 1).- a simple probe making it possible to locate the leak detected previously with precision and to control the flat welds (tank edge, peripheral welds) (ref. 2 figure 1).
- un circuit d'aspiration primaire reliant les sondes au détecteur de fuite par un circuit dérivé (ref. 3 figure 1).- a primary suction circuit connecting the probes to the leak detector by a derivative circuit (ref. 3 figure 1).
- un spectrometre de masse permettant d'identifier la présence de gaz traçant dans le circuit primaire et d'en doser la concentration (ref. 4 figure 1).- a mass spectrometer to identify the presence of tracing gas in the primary circuit and to measure the concentration (ref. 4 figure 1).
- un système de mesure donnant la valeur de la fuite sous forme d'un signal analogique (ref. 5 figure 1).- a measurement system giving the value of the leak in the form of an analog signal (ref. 5 figure 1).
- un casque opérateur transformant le signal indicateur en bruit à fréquence croissante avec l'importance de la fuite (ref. 6 figures 1 et 2).- an operator helmet transforming the indicator signal into noise at increasing frequency with the importance of the leak (ref. 6 figures 1 and 2).
- une bouteille de gaz pré-mélangé argon + gaz traçant équipée d'un régulateur de pression et d'un manomètre (ref. 7 figure 2). - a bottle of pre-mixed argon + tracer gas equipped with a pressure regulator and a pressure gauge (ref. 7 figure 2).
- une électrovanne de décharge du gaz de test dans la cuve (ref. 8 figure 2).- a test gas discharge solenoid valve in the tank (ref. 8 figure 2).
Mode operatoire
La difficulté d'un tel procédé réside en deux points - Ne pas detecter d'effets parasites pouvant être assimilés à une fuite.Operating mode
The difficulty of such a process lies in two points - Do not detect parasitic effects which can be assimilated to a leak.
- Ne pas saturer durablement le spectromètre avec le gaz traçant rendant ainsi le contrôle insensible pendant plusieurs dizaines de secondes.- Do not permanently saturate the spectrometer with the tracing gas, thus making the control insensitive for several tens of seconds.
Il faut aussi un temps de réponse assez court pour que la localisation de la fuite soit facile.It also takes a fairly short response time for the location of the leak to be easy.
L'appareillage permet de tourner ces difficultés.The apparatus makes it possible to overcome these difficulties.
La figure 2 montre le schéma de l'installation.Figure 2 shows the installation diagram.
La cuve est fermée par un couvercle rigide avec un joint souple. Le couvercle peut être maintenu par un vérin (ref. 9 figure 2), il possède un conduit d'arrivée du mélange gazeux.The tank is closed by a rigid cover with a flexible seal. The cover can be held by a jack (ref. 9 figure 2), it has a gas mixture inlet pipe.
On envoie le mélange gazeux sous pression pour gonfler la cuve à 100 mbar.The gaseous mixture is sent under pressure to inflate the tank to 100 mbar.
La pression est régulée par le régulateur sur la bouteille, la vanne de décharge étant fermée.The pressure is regulated by the regulator on the cylinder, the discharge valve being closed.
Le détecteur est mis en route et l'ouvrier parcourt les ailettes supérieures avec la sonde multiple. I1 a son casque sur les oreilles ce qui lui laisse les mains libres. Dès qu'une fuite est détectée, le bruitage s'entend dans le casque. L'ouvrier prend alors la sonde simple et recherche la fuite pour la localiser avec précision et la marquer pour retouche ultérieure.The detector is started and the worker traverses the upper fins with the multiple probe. He has his helmet on his ears which leaves his hands free. As soon as a leak is detected, the noise can be heard in the helmet. The worker then takes the simple probe and searches for the leak to locate it with precision and mark it for subsequent retouching.
En profitant du positionneur de soudure, il peut orienter sa cuve de differentes façons pour continuer sa détection.By taking advantage of the welding positioner, it can orient its tank in different ways to continue its detection.
A la fin, le détecteur s'arrête et la vanne de décharge met la cuve à l'air libre avant d'enlever le couvercle. At the end, the detector stops and the discharge valve releases the tank to the air before removing the cover.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8616037A FR2606878A1 (en) | 1986-11-13 | 1986-11-13 | Transformer tank leak detection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8616037A FR2606878A1 (en) | 1986-11-13 | 1986-11-13 | Transformer tank leak detection |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2606878A1 true FR2606878A1 (en) | 1988-05-20 |
Family
ID=9340933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8616037A Withdrawn FR2606878A1 (en) | 1986-11-13 | 1986-11-13 | Transformer tank leak detection |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2606878A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2767197A1 (en) * | 1997-08-11 | 1999-02-12 | Alsthom Cge Alcatel | GAS ANALYZER |
CN104132786A (en) * | 2014-07-31 | 2014-11-05 | 国家电网公司 | Rapid leakage detecting method suitable for extra-high voltage converter transformers |
CN106733724A (en) * | 2017-03-21 | 2017-05-31 | 道真自治县金林科技有限公司 | A kind of screening plant for high frequency transformer |
-
1986
- 1986-11-13 FR FR8616037A patent/FR2606878A1/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2767197A1 (en) * | 1997-08-11 | 1999-02-12 | Alsthom Cge Alcatel | GAS ANALYZER |
WO1999008086A1 (en) * | 1997-08-11 | 1999-02-18 | Alcatel | Gas analysing apparatus |
US6263724B1 (en) | 1997-08-11 | 2001-07-24 | Alcatel | Gas analyzing apparatus |
CN104132786A (en) * | 2014-07-31 | 2014-11-05 | 国家电网公司 | Rapid leakage detecting method suitable for extra-high voltage converter transformers |
CN106733724A (en) * | 2017-03-21 | 2017-05-31 | 道真自治县金林科技有限公司 | A kind of screening plant for high frequency transformer |
CN106733724B (en) * | 2017-03-21 | 2019-01-18 | 道真自治县金林科技有限公司 | A kind of screening plant for high frequency transformer |
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ST | Notification of lapse |