FR2641864A1 - Device designed for checking the leaktightness of underground or other domestic fuel storage tanks - Google Patents

Device designed for checking the leaktightness of underground or other domestic fuel storage tanks Download PDF

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Publication number
FR2641864A1
FR2641864A1 FR8900493A FR8900493A FR2641864A1 FR 2641864 A1 FR2641864 A1 FR 2641864A1 FR 8900493 A FR8900493 A FR 8900493A FR 8900493 A FR8900493 A FR 8900493A FR 2641864 A1 FR2641864 A1 FR 2641864A1
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France
Prior art keywords
membrane
pressure
cover
flange
tank
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Application number
FR8900493A
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French (fr)
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RENVOISE JACQUES
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RENVOISE JACQUES
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Priority to FR8900493A priority Critical patent/FR2641864A1/en
Publication of FR2641864A1 publication Critical patent/FR2641864A1/en
Withdrawn legal-status Critical Current

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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
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3209—Details, e.g. container closure devices
    • 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
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The device comprises: - means for sealing the manhole; - means 10 for injecting a compressed gas suitable for changing the pressure in the said tank; and - means 11 for assessing the pressure in the latter. The sealing means consist of a diaphragm 8 with an opening 15, the said diaphragm being designed to fit over the cover 3 of the manhole of the tank by penetration of the said cover 3 and of the flange 2 of the ring 1 into the said opening 15, the diaphragm 8 being fitted in a leaktight manner over the ring 1 by the clamping collar 9, the diaphragm 8 being passed through in a leaktight manner by the said gas injection means 10 and by the said means 11 for assessing the pressure in the tank.

Description

La présente invention a pour objet un dispositif de contrôle dtétanchéité pour réservoirs de stockage,enterrés ou non, plus particulièrement de stockage d'hydrocarbures tel que le fioul domestique. The present invention relates to a tightness control device for storage tanks, buried or not, more particularly for the storage of hydrocarbons such as heating oil.

Plus précisément, la présente invention a pour objet un dispositif adapté à l'obturation étanche et au contrôle dlétanchéité d'un réservoir de stockage dont le trou dthom- me est surmonté d'une corolle garnie d'une bride obturée par un couvercle reposant sur ladite bride et présentant des tuyauteries de liaison à la chaufferie ledit dispositif comprenant - des moyens d'étanchéité du trou d'homme du réservoir, - des moyens d'injection d'un gaz adapté à modifier la
pression dans ledit réservoir et, - des moyens d'appréciation de la pression dans ce dernier.More specifically, the subject of the present invention is a device suitable for sealing and sealing the tightness of a storage tank, the manhole of which is surmounted by a corolla fitted with a flange closed by a cover resting on said flange and having piping connecting to the boiler room said device comprising - means for sealing the manhole of the tank, - means for injecting a gas adapted to modify the
pressure in said tank and, - means for assessing the pressure in the latter.

Un dispositif de ce type est connu d'après la demande de brevet français 88.16.134
Selon cette demande de brevet, les moyens dlétanchéité sont constitués par un caisson rigide venant coiffer le couvercle du trou d'homme par pénétration dudit couvercle et de la bride de la corolle, un organe périphérique gonflable étant disposé entre la paroi latérale du caisson et la ligne de jonction entre le couvercle et la bride, la paroi supérieure du caisson étant traversée de manière étanche par des moyens d'injection de gaz et par des moyens d'appréciaticin de la pression dans le réservoir.A device of this type is known from French patent application 88.16.134
According to this patent application, the sealing means consist of a rigid box covering the cover of the manhole by penetration of said cover and the flange of the corolla, an inflatable peripheral member being disposed between the side wall of the box and the junction line between the cover and the flange, the upper wall of the box being crossed in a leaktight manner by gas injection means and by means for assessing the pressure in the tank.

La rigidité de la structure du caisson constitue un obstacle à une bonne adaptabilité à tous les réservoirs. The rigidity of the box structure is an obstacle to good adaptability to all tanks.

En effet, le positionnement des canalisations et leur tuyauterie de raccordement au couvercle du trou d'homme se différencie sur chacun d'entre eux.Indeed, the positioning of the pipes and their piping for connection to the manhole cover differs on each of them.

De plus, l'adaptation du caisson par un joint étanche gonflable sur la ligne de jonction entre le couvercle et la bride ne pallie pas à toutes les possibilités de fuites lorsque le réservoir-est mis en pression, des fuites pouvant se produire au niveau des boulons de fixation du couvercle du trou d'homme sur la bride.  In addition, the adaptation of the box by an inflatable waterproof seal on the junction line between the cover and the flange does not compensate for all the possibilities of leaks when the tank is pressurized, leaks can occur at the level of the bolts securing the manhole cover to the flange.

La présente invention a pour but de remédier à ces inconvénients en conservant des moyens qui permettent de réaliser ltopération d'obturation étanche et de contrôle d'étanchéité en se bornant à démonter les tuyaux d'arrivée et de sortie du produit contenu dans le réservoir des tubulures correspondantes prévues sur le couvercle. The object of the present invention is to remedy these drawbacks by retaining means which make it possible to carry out the sealing shutter and tightness control operation by confining itself to dismantling the inlet and outlet pipes of the product contained in the reservoir of the corresponding pipes provided on the cover.

A cette fin, la présente invention apporte un dispositif du type précité dans lequel les moyens d'étanchéité sont constitués par une membrane avec ouverture, ladite membrane étant adaptée à venir coiffer le couvercle du trou d'homme par pénétration dudit couvercle et de la bride de la corolle dans ladite ouverture, la membrane venant s'adapter de façon étanche sur la corolle par un collier de serrage, la partie supérieure de la membrane étant traversée de manière étanche par lesdits moyens d'appréciation de la pression dans le réservoir. To this end, the present invention provides a device of the aforementioned type in which the sealing means consist of a membrane with opening, said membrane being adapted to cover the cover of the manhole by penetration of said cover and the flange. of the corolla in said opening, the membrane fitting tightly onto the corolla by a clamp, the upper part of the membrane being leaktightly traversed by said means for assessing the pressure in the reservoir.

Grâce à cette structure, la membrane peut etre mise en place sur la bride du trou d'homme, sans démontage du couvercle. Thanks to this structure, the membrane can be placed on the manhole flange, without removing the cover.

Lorsque l'on injecte un gaz par lesdits moyens prévus à cet effet, gaz qui sera de préférence de l'air ou de l'azote celui-ci tout en donnant forme à la membrane pénètre par les tuyauteries béantes du couvercle et fait monter la pression dans l'ensemble formé par le réservoir et la membrane comme le montrent les moyens d'appréciation. On interrompt alors l'injection de gaz et observe lesdits moyens0 Si l'information donnée par ces derniers sous l'effet de cette pression constante reste stable, on en conclut que le réservoir est étanche. Si au contraire l'information varie, cela révèle l'existence dtune perforation dans la paroi du réservoir. When a gas is injected by said means provided for this purpose, gas which will preferably be air or nitrogen thereof while giving shape to the membrane penetrates through the gaping pipes of the cover and causes the pressure in the assembly formed by the reservoir and the membrane as shown by the means of assessment. The injection of gas is then interrupted and said means are observed0 If the information given by the latter under the effect of this constant pressure remains stable, it is concluded that the tank is sealed. If on the contrary the information varies, this reveals the existence of a perforation in the wall of the tank.

Dans une forme dlexecution préférée de l'inwention, les moyens d'appréciation de la pression sont constitués par. un tube de lecture qui traverse la membrane et qui se prolonge, à l'intérieur de la membrane, par un récipient au moins en partie déformable sous l'effet de la pression et contenant un liquide test peu dense. In a preferred embodiment of the invention, the means for assessing the pressure are constituted by. a reading tube which passes through the membrane and which extends, inside the membrane, by a container at least partially deformable under the effect of pressure and containing a sparse test liquid.

Lorsque 1 llon élève la pression, le récipient contenant le liquide test se déforme et le liquide test est chassé dans la partie de lecture du tube. Lorsque le liquide test arrive dans cette partie de lecture, on interrompt l'injection de gaz, et lton observe le niveau du liquide test. Ce niveau constitue ltinformation dont la variation éventuelle est observée. When the pressure rises, the container containing the test liquid deforms and the test liquid is expelled into the reading part of the tube. When the test liquid arrives in this reading part, the gas injection is interrupted, and the level of the test liquid is observed. This level constitutes the information whose possible variation is observed.

L'invention sera décrite ci-après, avec davantage de détails, par référence à la figure unique du dessin annexé. The invention will be described below, in more detail, with reference to the single figure of the accompanying drawing.

Dans cette figure, on voit la corolle 1 du trou d'homme dtun réservoir de stockage non représenté. La corolle 1 présente une bride 2 adaptée à recevoir un couvercle 3 fixé à ladite bride au moyen de boulons 4. Le couvercle 3 présente, d'une manière connue en soi, une tuyauterie 5 d'entrée de produit, une tuyauterie 7 de sortie de produit et un évent 6. In this figure, we see the corolla 1 of the manhole dtun storage tank not shown. The corolla 1 has a flange 2 adapted to receive a cover 3 fixed to said flange by means of bolts 4. The cover 3 has, in a manner known per se, a product inlet pipe 5, an outlet pipe 7 of product and a vent 6.

La membrane selon l'invention, désignée dans son ensemble par la référence 8 comprend une ouverture 15 permettant de faire pénétrer, dans la membrane 8, l'ensemble formé par le couvercle 3 et la bride 2. Lorsque l'on met la membrane en place sur la corolle 1, le collier de serrage 9 est ajusté pour assurer l T étanchéité entre la membrane et la partie extérieure de la corolle 1.
La membrane 8 est pourvue dans sa partie supérieure d'une canalisation d'admission d'air comprimé ou d'azote 10 et d'un tube de lecture 11. Le tube de lecture Il débouche dans un récipient 12 dont la paroi inférieure est constituée par une membrane déformable 13. le récipient 12 renferme un liquide coloré, par exemple de l'eau 14.The membrane according to the invention, designated as a whole by the reference 8 comprises an opening 15 making it possible to penetrate, into the membrane 8, the assembly formed by the cover 3 and the flange 2. When the membrane is put in placed on the corolla 1, the clamp 9 is adjusted to ensure the seal between the membrane and the outer part of the corolla 1.
The membrane 8 is provided in its upper part with a compressed air or nitrogen inlet pipe 10 and with a reading tube 11. The reading tube It opens into a container 12, the lower wall of which is made up by a deformable membrane 13. the container 12 contains a colored liquid, for example water 14.

Le fonctionnement du dispositif est le suivant après avoir démonté, respectivement les tuyauteries de liaison à la chaufferie 5 et 7, les tuyaux d'entrée et de sortie du produit normalement contenu dans le réservoir et éventuel liement ltévent, on met en place la membrane 8 sur la corolle 1 en faisant pénétrer la bride 2 et le couvercle 3 dans ltouxerture 15 de la membrane. Pour adapter la membrane 8 sur la corolle 1 On met ensuite en place le collier de serrage 9 de façon à assurer l'étanchéité de 1 t ensemble.  The operation of the device is as follows after having dismantled, respectively the piping connecting to the boiler room 5 and 7, the inlet and outlet pipes of the product normally contained in the tank and possible ltévent binding, the membrane 8 is put in place. on the corolla 1 by making the flange 2 and the cover 3 penetrate into the opening 15 of the membrane. To adapt the membrane 8 to the corolla 1 The clamp 9 is then put in place so as to seal 1 t together.

On injecte le gaz comprimé par la canalisation 10, lequel gaz pénétre par les tuyauteries 5 et 7 et l'évent 6.The compressed gas is injected through the pipe 10, which gas enters through the pipes 5 and 7 and the vent 6.

L'admission du gaz comprimé augmente la pression dans l'ensemble formé par le réservoir et la membrane 8 et cette pression donne forme à la membrane 8 en fonction des obstacles extérieurs et déforme la membrane 13 en chassant le liquide 14 dans le tube de lecture 11.The admission of the compressed gas increases the pressure in the assembly formed by the reservoir and the membrane 8 and this pressure gives shape to the membrane 8 according to the external obstacles and deforms the membrane 13 by driving out the liquid 14 in the reading tube. 11.

Si le liquide avait au repos un niveau Sot1, il atteint par exemple le niveau N2 lorsque ltensemble a été mis sous pression. If the liquid had at rest a level Sot1, it reaches for example the level N2 when the assembly has been pressurized.

On interrompt alors l'injection de gaz comprimé et on observe le niveau 52 Si celui-ci demeure stable, cela signifie que le réservoir est étanche. Si au contraire le niveau varie, cela traduit un défaut d'étanchéité du réservoir. The injection of compressed gas is then interrupted and the level 52 is observed. If it remains stable, this means that the tank is sealed. If, on the contrary, the level varies, this translates into a leak in the tank.

Le dispositif selon l'invention présente l'avantage de ne pas nécessiter la désolidarisation du couvercle 3 et de la bride 2. The device according to the invention has the advantage of not requiring the separation of the cover 3 and the flange 2.

De plus, le dispositif selon l'invention présente suffisamment de souplesse pour s'adapter à tous les contextes de montage des tuyauteries de liaison à la chaufferie 5 et 7 et des canalisations qui s'y raccordent. In addition, the device according to the invention has sufficient flexibility to adapt to all contexts for mounting the connection pipes to the boiler room 5 and 7 and the pipes which are connected thereto.

Il présente l'avantage supplémentaire de s'adapter à toute forme de trou d'homme, notamment ceux de forme ovale. It has the additional advantage of adapting to any shape of manhole, especially those of oval shape.

On peut aussi adjoindre aux moyens d'injection d'air ou d'azote et aux moyens d'apprécintion de la pression, des moyens d'appréciation de mesure physique ou chimique tels que par exemple des moyens dtappréciation de la variation de la température. It is also possible to add to the means for injecting air or nitrogen and to the means for appressing the pressure, means for assessing physical or chemical measurement such as for example means for appraising the variation in temperature.

Enfin, la membrane seule peut aussi servir à ltobtu- ration étanche d'évents disposés sur le corps des cuves de gros stockage évents dont la présence stoppose à la mise en pression de ce type de cuves.  Finally, the membrane alone can also be used for the sealed obturation of vents placed on the body of large storage tank vents, the presence of which stops the pressurization of this type of tank.

Claims (3)

REVENDICATIONS 1 - Dispositif adapté à l'obturation étanche et au contrôle d'étanchéité d'un réservoir de stockage dont le trou d'homme est surmonté d'une corolle (1) garnie d'une bride (2) obturée par un couvercle (3) reposant sur ladite bride et présentant des tuyauteries de raccordements (5,7) et un évent (6), ledit dispositif comprenant - des moyens d'étanchéité du trou d'homme; - des moyens d'injection (10) d'un gaz comprimé adapté à modifier la pression dans ledit réservoir; et - des moyens d'appréciation (11) de la pression dans ce dernier, caractérisé en ce que les moyens d'étanchéité sont constitués par une membrane (8) comportant une ouverture (15), ladite membrane étant adaptée à venir coiffer le couvercle (3) du trou d'homme par pénétration dudit couvercle (3) et de la bride (2) de la corolle (1) dans ladite ouverture (15), la membrane (8) étant ajustée de manière étanche sur la corolle (1) par le collier de serrage (9), la membrane (8) étant traversée de manière étanche par lesdits moyens dtin- ection de gaz (10) et par lesdits moyens d'appréciation (11) de la pression dans le réservoir. 1 - Device suitable for sealing and sealing control of a storage tank whose manhole is surmounted by a corolla (1) fitted with a flange (2) closed by a cover (3 ) resting on said flange and having connection pipes (5,7) and a vent (6), said device comprising - manhole sealing means; - means for injecting (10) a compressed gas adapted to modify the pressure in said tank; and - means for assessing (11) the pressure in the latter, characterized in that the sealing means consist of a membrane (8) having an opening (15), said membrane being adapted to cover the cover (3) of the manhole by penetration of said cover (3) and of the flange (2) of the corolla (1) in said opening (15), the membrane (8) being tightly fitted on the corolla (1 ) by the clamp (9), the diaphragm (8) being leaktight through by said gas detection means (10) and by said means (11) for assessing the pressure in the tank. 2 - Dispositif selon la revendication 1 caractérisé en ce que les moyens dlappréciation de la pression sont constitués par un tube de lecture (11) qui traverse de manière étanche la membrane (8) et qui se prolonge à l'in- térieur de la membrane par un récipient (12) au moins en partie déformable sous l'effet de la pression et contenant un liquide test peu dense. 2 - Device according to claim 1 characterized in that the pressure appreciation means consist of a reading tube (11) which passes through the membrane (8) in a sealed manner and which extends inside the membrane by a container (12) at least partially deformable under the effect of pressure and containing a sparse test liquid. 3 - Dispositif selon la revendication 1, caractérisé en ce que ladite canalisation (10) est raccordée à une source d'air ou d'azote comprimé.  3 - Device according to claim 1, characterized in that said pipe (10) is connected to a source of air or compressed nitrogen.
FR8900493A 1989-01-17 1989-01-17 Device designed for checking the leaktightness of underground or other domestic fuel storage tanks Withdrawn FR2641864A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8900493A FR2641864A1 (en) 1989-01-17 1989-01-17 Device designed for checking the leaktightness of underground or other domestic fuel storage tanks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8900493A FR2641864A1 (en) 1989-01-17 1989-01-17 Device designed for checking the leaktightness of underground or other domestic fuel storage tanks

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104986424A (en) * 2015-07-03 2015-10-21 中国原子能科学研究院 Integrated sealing cover device
CN109387337A (en) * 2018-08-23 2019-02-26 南京六和普什机械有限公司 A kind of new automobile fuel tank leak testing process and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538746A (en) * 1968-10-31 1970-11-10 Standard Oil Co Leak detecting method and apparatus
FR2188826A5 (en) * 1972-06-05 1974-01-18 Coquerel Michel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538746A (en) * 1968-10-31 1970-11-10 Standard Oil Co Leak detecting method and apparatus
FR2188826A5 (en) * 1972-06-05 1974-01-18 Coquerel Michel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 20, no. 2, juillet 1977, page 784, New York, US; J.H. FANNEY, Jr.: "Safety cap/leak detector for gas cylinder" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104986424A (en) * 2015-07-03 2015-10-21 中国原子能科学研究院 Integrated sealing cover device
CN104986424B (en) * 2015-07-03 2017-03-22 中国原子能科学研究院 Integrated sealing cover device
CN109387337A (en) * 2018-08-23 2019-02-26 南京六和普什机械有限公司 A kind of new automobile fuel tank leak testing process and device

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