FR3002294A1 - Arrangement for setting overpressure in air compressor that is utilized in potentially explosive zone, has suction source for providing suction of overpressure air in potentially explosive zone in which air compressor is utilized - Google Patents
Arrangement for setting overpressure in air compressor that is utilized in potentially explosive zone, has suction source for providing suction of overpressure air in potentially explosive zone in which air compressor is utilized Download PDFInfo
- Publication number
- FR3002294A1 FR3002294A1 FR1300345A FR1300345A FR3002294A1 FR 3002294 A1 FR3002294 A1 FR 3002294A1 FR 1300345 A FR1300345 A FR 1300345A FR 1300345 A FR1300345 A FR 1300345A FR 3002294 A1 FR3002294 A1 FR 3002294A1
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- FR
- France
- Prior art keywords
- air
- overpressure
- utilized
- potentially explosive
- arrangement according
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
DESCRIPTION La présente invention concerne un agencement pour la mise en surpression d'un ensemble électromécanique, une méthode d'assemblage et des systèmes associés en vue d'exploiter l'ensemble en zone explosible. On connaît de tels procédés qui fonctionnent par mise en surpression d'un boîtier contenant des moyens électriques à l'aide de gaz inerte ou d'air, en bouteille ou en réseau. La surpression est un mode de protection contre les explosions lorsque des moyens électriques non protégés peuvent être mis en contact avec une atmosphère dangereuse telle que pouvant contenir des gaz ou des vapeurs combustibles, ou des poussières combustibles. L'enveloppe du matériel électrique est alors remplie d'un gaz de protection tel que l'air, un gaz inerte ou un autre gaz approprié, à une pression supérieure à celle de l'atmosphère environnante, qui ne peut donc pas s'infiltrer à l'intérieur de l'enveloppe.DESCRIPTION The present invention relates to an arrangement for the overpressure of an electromechanical assembly, an assembly method and associated systems for operating the assembly in an explosive zone. Such processes are known which operate by overpressurizing a housing containing electrical means using inert gas or air, bottled or network. Overpressure is a mode of explosion protection when unprotected electrical means may be brought into contact with a hazardous atmosphere such as may contain combustible gases or vapors, or combustible dusts. The enclosure of the electrical equipment is then filled with a protective gas such as air, an inert gas or another suitable gas, at a pressure higher than that of the surrounding atmosphere, which can not infiltrate inside the envelope.
L'enveloppe peut soit être étanche, soit laisser s'échapper le gaz de protection et la fuite du gaz de protection est alors compensée afin de maintenir la différence de pression requise. Les agencements communs utilisent une source de gaz neutre, ou d'air, ou autre, provenant d'une zone sûre, c'est-à-dire sans risque d'être polluée par une atmosphère explosive, puisqu'il s'agit soit de bouteille de gaz sous pression du commerce, soit d'air prélevé dans une zone certainement non dangereuse, c'est-à-dire où l'atmosphère ne contient pas de gaz ou de vapeurs combustibles, ou de poussières combustibles. L'agencement selon l'invention permet d'assurer une pressurisation d'un ensemble électromécanique, sous la forme préférentielle d'un compresseur d'air, lorsque les sources habituelles de gaz utilisées pour la mise sous pression ne sont pas disponibles, ou lorsque la source de gaz de pressurisation est en zone potentiellement dangereuse, c'est-à-dire pouvant contenir des gaz ou des vapeurs combustibles, ou de la poussière combustible.30 L'invention concerne un agencement de mise en surpression d'un ensemble électromécanique destiné à une utilisation en zone potentiellement explosive, caractérisé en ce qu'il comporte une aspiration de la source d'air de surpression en zone potentiellement explosive.The casing can either be sealed, or escape the shielding gas and the shielding gas leakage is then compensated to maintain the required pressure difference. The common arrangements use a source of neutral gas, or air, or other, from a safe area, that is to say without risk of being polluted by an explosive atmosphere, since it is either commercial pressurized gas cylinder, that is to say air taken in a certainly safe zone, that is to say where the atmosphere does not contain combustible gases or vapors, or combustible dusts. The arrangement according to the invention makes it possible to ensure a pressurization of an electromechanical assembly, in the preferred form of an air compressor, when the usual sources of gas used for pressurization are not available, or when the source of the pressurizing gas is in a potentially dangerous zone, that is to say capable of containing combustible gases or vapors, or combustible dust. The invention relates to an arrangement for overpressurizing an electromechanical assembly. intended for use in a potentially explosive zone, characterized in that it comprises an aspiration of the source of excess pressure air in a potentially explosive zone.
L'aspiration de la source d'air s'effectue par une entrée d'air sécurisée afin de fournir un air non dangereux à l'ensemble du circuit de surpression. L'entrée d'air comporte un système de détection de gaz et/ou une filtration renforcée. L'ensemble électromécanique est un compresseur d'air utilisant l'air entrant par l'entrée d'air.The suction of the air source is effected by a secure air inlet to provide a non-hazardous air to the entire pressure circuit. The air inlet has a gas detection system and / or enhanced filtration. The electromechanical assembly is an air compressor using air entering through the air inlet.
Au moins une bonbonne d'air permet de stocker un volume d'air non dangereux suffisant pour purger au moins dix fois le volume d'air de l'enveloppe d'un système à mettre en surpression. L'air non dangereux sous pression en sortie du compresseur est envoyé dans l'enveloppe à mettre en surpression ou bien stockée dans au moins une bonbonne de stockage. L'invention concerne également une méthode de commande d'un agencement comportant les étapes suivantes : - Détermination de la présence de gaz et de vapeur combustible par un système de détection de gaz et de vapeur combustible - Si la présence de tel gaz ou de telle vapeur est avérée, déclenchement de l'arrêt de l'ensemble électromécanique L'invention concerne enfin un système destiné à être utilisé en zone explosible, comportant un tel agencement.At least one air cylinder can store a volume of non-hazardous air sufficient to purge at least ten times the volume of air of the envelope of a system to put overpressure. The non-hazardous air under pressure at the outlet of the compressor is sent into the envelope to be overpressurized or stored in at least one storage tank. The invention also relates to a control method of an arrangement comprising the following steps: - Determination of the presence of gas and combustible vapor by a system for detecting gas and combustible vapor - If the presence of such gas or such The invention finally relates to a system for use in an explosive zone, comprising such an arrangement.
Les dessins annexés illustrent l'invention : La figure 1 (1/1) représente le dispositif de l'invention.The accompanying drawings illustrate the invention: FIG. 1 (1/1) represents the device of the invention.
Dans cette forme préférentielle d'un compresseur d'air, les enveloppes des matériels électriques sont constituées par les boitiers de commande de l'ensemble électromécanique et par le moteur électrique. Dans la situation où la source de gaz de pressurisation est en zone potentiellement 5 dangereuse, il faut considérer que la durée et la fréquence d'avoir une atmosphère explosible est, selon les études habituelles en la matière, inférieure à 1000 heures par an et de manière occasionnelle. Il comporte en effet un système de détection de gaz et de vapeurs combustibles, ou un élément de filtration renforcée de poussière combustible, à l'entrée de la source d'air, 10 selon que la zone potentiellement dangereuse est constituée de gaz ou de vapeurs combustibles, ou de poussière combustible. Lorsque le système de détection de gaz et de vapeur combustible détecte la présence de tel gaz ou de telle vapeur, il déclenche l'arrêt de l'ensemble électromécanique. L'élément de filtration renforcée permet d'éviter le passage de la poussière 15 combustible dans le circuit d'air. Son remplacement régulier fait l'objet d'une procédure spécifique de maintenance ou d'une alerte par des capteurs de colmatage. Il comporte de plus une dérivation d'air à la sortie d'air du compresseur d'air, selon la forme préférentielle de l'ensemble électromécanique. Cette dérivation amène l'air vers un stockage en bonbonnes pour alimenter le circuit de surpression lors du redémarrage du 20 compresseur d'air, en quantité suffisante. En effet, des obligations normatives selon EN 60079-2 relatives à l'exploitation en mode de protection contre les explosions par surpression, indiquent la nécessité de purger cinq fois le volume des enveloppes en surpression lors d'une mise en route, ou d'une remise en route après une ouverture des enveloppes en surpression à la suite d'une 25 intervention pour maintenance ou pour réparation. En référence à ce dessin, l'agencement comporte un compresseur d'air (1) actionné par un moteur électrique (2), un boîtier de commande (3) de l'ensemble électromécanique. Un système de détection de gaz (4) placé à l'entrée de la source d'air, ou une filtration renforcée (5), un ensemble de bonbonnes d'air (6), un boîtier de 30 commande du système de surpression (7), d'un tuyau d'air primaire (8) depuis la sortie du compresseur d'air (1) jusqu'à l'ensemble de bonbonnes d'air (6), de tuyaux d'air secondaires (9) depuis l'ensemble de bonbonne d'air (8) aux enveloppes pressurisées (3) et au moteur électrique (2).5In this preferred form of an air compressor, the envelopes of the electrical equipment consist of the control boxes of the electromechanical assembly and the electric motor. In the situation where the source of pressurizing gas is in a potentially dangerous zone, it must be considered that the duration and the frequency of having an explosive atmosphere is, according to the usual studies in the field, less than 1000 hours per year and of occasional way. It comprises in fact a system for detecting combustible gases and vapors, or a filter element reinforced with combustible dust, at the inlet of the air source, depending on whether the potentially dangerous zone consists of gases or vapors. combustible, or combustible dust. When the combustible gas and vapor detection system detects the presence of such gas or vapor, it triggers the shutdown of the electromechanical assembly. The reinforced filter element makes it possible to prevent the passage of combustible dust in the air circuit. Its regular replacement is the subject of a specific maintenance procedure or an alert by clogging sensors. It further comprises an air bypass at the air outlet of the air compressor, according to the preferred form of the electromechanical assembly. This bypass brings the air to a storage in bottles to supply the overpressure circuit during the restart of the air compressor, in sufficient quantity. Indeed, normative obligations according to EN 60079-2 relating to the operation in mode of protection against explosion by overpressure, indicate the necessity to purge five times the volume of the envelopes in overpressure during a start-up, or of a restart after opening the envelopes overpressure following a maintenance intervention or repair. With reference to this drawing, the arrangement comprises an air compressor (1) actuated by an electric motor (2), a control box (3) of the electromechanical assembly. A gas detection system (4) placed at the inlet of the air source, or a reinforced filtration (5), a set of air bottles (6), a control box of the booster system ( 7), a primary air pipe (8) from the outlet of the air compressor (1) to the set of air bottles (6), secondary air pipes (9) from the air cylinder assembly (8) with the pressurized envelopes (3) and the electric motor (2).
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1300345A FR3002294B1 (en) | 2013-02-18 | 2013-02-18 | ARRANGEMENT FOR PRESSURIZING AN ELECTROMECHANICAL ASSEMBLY, A METHOD OF ASSEMBLY AND ASSOCIATED SYSTEMS TO EXPLOIT THE ENSEMBLE IN AN EXPLOSIVE AREA |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1300345A FR3002294B1 (en) | 2013-02-18 | 2013-02-18 | ARRANGEMENT FOR PRESSURIZING AN ELECTROMECHANICAL ASSEMBLY, A METHOD OF ASSEMBLY AND ASSOCIATED SYSTEMS TO EXPLOIT THE ENSEMBLE IN AN EXPLOSIVE AREA |
Publications (2)
Publication Number | Publication Date |
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FR3002294A1 true FR3002294A1 (en) | 2014-08-22 |
FR3002294B1 FR3002294B1 (en) | 2016-10-28 |
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FR1300345A Expired - Fee Related FR3002294B1 (en) | 2013-02-18 | 2013-02-18 | ARRANGEMENT FOR PRESSURIZING AN ELECTROMECHANICAL ASSEMBLY, A METHOD OF ASSEMBLY AND ASSOCIATED SYSTEMS TO EXPLOIT THE ENSEMBLE IN AN EXPLOSIVE AREA |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0482414A1 (en) * | 1990-10-23 | 1992-04-29 | Walter Becker GmbH | Spark-proof casing for electrical installations used in underground mining |
DE102004029460A1 (en) * | 2004-06-18 | 2006-01-05 | Deilmann-Haniel Mining Systems Gmbh | Unit for generating of compressed air for use in explosion-hazardous environments is constructed as mobile unit which can be used independently of available compressed air system, or constructed to complement one |
EP1703616A1 (en) * | 2005-03-15 | 2006-09-20 | Bosch Rexroth AG | Protection device for electric motor |
WO2010014014A1 (en) * | 2008-07-31 | 2010-02-04 | Scan Tech As | Mobile breathing-air compressor unit with means for keeping the operation temperature below a limit value |
DE102010000804A1 (en) * | 2010-01-12 | 2011-07-14 | Siemens Aktiengesellschaft, 80333 | Electrical operating unit i.e. direct current generator-electrical machine, for use in explosion endangered area, has pressure tank attached at rinsing system via extreme over-pressure supply unit/local over pressure supply unit |
-
2013
- 2013-02-18 FR FR1300345A patent/FR3002294B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0482414A1 (en) * | 1990-10-23 | 1992-04-29 | Walter Becker GmbH | Spark-proof casing for electrical installations used in underground mining |
DE102004029460A1 (en) * | 2004-06-18 | 2006-01-05 | Deilmann-Haniel Mining Systems Gmbh | Unit for generating of compressed air for use in explosion-hazardous environments is constructed as mobile unit which can be used independently of available compressed air system, or constructed to complement one |
EP1703616A1 (en) * | 2005-03-15 | 2006-09-20 | Bosch Rexroth AG | Protection device for electric motor |
WO2010014014A1 (en) * | 2008-07-31 | 2010-02-04 | Scan Tech As | Mobile breathing-air compressor unit with means for keeping the operation temperature below a limit value |
DE102010000804A1 (en) * | 2010-01-12 | 2011-07-14 | Siemens Aktiengesellschaft, 80333 | Electrical operating unit i.e. direct current generator-electrical machine, for use in explosion endangered area, has pressure tank attached at rinsing system via extreme over-pressure supply unit/local over pressure supply unit |
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FR3002294B1 (en) | 2016-10-28 |
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