EP0422980A1 - Mobile ventilating system - Google Patents

Mobile ventilating system Download PDF

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Publication number
EP0422980A1
EP0422980A1 EP90402666A EP90402666A EP0422980A1 EP 0422980 A1 EP0422980 A1 EP 0422980A1 EP 90402666 A EP90402666 A EP 90402666A EP 90402666 A EP90402666 A EP 90402666A EP 0422980 A1 EP0422980 A1 EP 0422980A1
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EP
European Patent Office
Prior art keywords
plenum
area
pit
longitudinal
grating
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Granted
Application number
EP90402666A
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German (de)
French (fr)
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EP0422980B1 (en
Inventor
Emile Allaire
Bernard Brosset
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Individual
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Individual
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Priority to AT90402666T priority Critical patent/ATE87508T1/en
Publication of EP0422980A1 publication Critical patent/EP0422980A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/60—Ventilation arrangements specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/80—Movable spray booths

Definitions

  • the present invention relates to a mobile ventilation installation provided for a work station whose atmosphere is vitiated by solvent vapors, toxic gases or dust which we want to protect the operators of the station.
  • document FR-A-2 551 366 describes a ventilation installation for a paint booth consisting of a closed enclosure surmounted by a ventilation plenum blowing air into said booth, this air, charged with pollutants emitted on the work area, being vacuumed by the floor. Installations of this type provide ventilation and extraction of pollutants over the entire volume of the cabin.
  • the document FR-A-2,534,155 describes, for example, a paint booth comprising compartments each connected to an air supply duct and to an extraction duct with shutter means which can be controlled for limit the ventilated area to only one of these compartments.
  • the work station moves along this room and the shutters are controlled to ventilate the only compartment where it is located. Substantial energy savings are achieved with installations of this type.
  • the object of the invention is to propose a ventilation installation which does not have the drawbacks mentioned above.
  • the object of the invention is to provide a ventilation installation whose installed power is low compared to the installations of the prior art having the same floor area, the ventilated surface of which can move at the same time as the area of work, and which is accessible by handling equipment.
  • the invention therefore relates to an installation for ventilating a work area comprising a blowing plenum overhanging a grating mounted on a pit maintained in depression to form an extraction area where the air blown by the plenum and charged with pollutants emitted on the work area is extracted.
  • the plenum has a blowing surface less than the total surface of the installation pit and is mounted on a plenum-carrying carriage which can move over the entire length of the installation, and means are provided to limit the extraction area on the grating to an area substantially corresponding to the blowing surface of the plenum projected on the grating, this area moving together with the carriage supporting the plenum.
  • the pit is divided by transverse walls forming two by two transverse gutters, these walls connecting a wall forming one of the longitudinal edges of the pit to a second wall constituting, with the wall of the other longitudinal edge of the pit, a longitudinal channel, this longitudinal channel being maintained in depression by means of a suction fan, and the means for limiting the extraction area consist in establishing communication between the transverse channels which are under the plenum and the longitudinal channel, and block the passage of air between the transverse channels which are not under the plenum and the longitudinal channel.
  • the means for limiting the extraction area comprise a mat which is stretched longitudinally between the two ends of the ventilation installation, which covers, with part of its width, the gutter longitudinal and, on the other part of its width, part of the length of the transverse channels, which is pressed against the wall separating the transverse channels from the longitudinal channel which obstructs the passage of air between these channels, and which passes under the plenum-carrying carriage where it is lifted to form a passage between the longitudinal channel and the transverse channels located under the plenum with the side walls of said carriage, in order to maintain the surface of the grating which is just below the blowing surface of the plenum, the air blown and charged with pollutants emitted on the work area being then entrained in the transverse gutters then in dan s the longitudinal channel before being expelled.
  • openings are provided in the wall separating the transverse channels and the longitudinal channel in order to maintain at least a predetermined minimum depression on the surface of the grating.
  • the mat is raised under the plenum-carrying carriage by means of rollers.
  • the ventilation system shown in FIG. 1 comprises a pit 1 divided by transverse walls 2 forming two by two transverse channels 3, the number of which is proportional to the length of the ventilation installation.
  • the transverse walls 2 connect a wall 4 forming one of the two longitudinal edges of the pit to a wall 5.
  • the transverse channels 3 are covered with a grating 8 of length equal to that of the pit 1 and of smaller width, for reasons mentioned below, to the length of the transverse walls 3.
  • At the end of the longitudinal channel 7, is mounted an extraction chimney 9 inside which is placed a suction fan 10 maintaining said longitudinal channel 7 in depression.
  • a carriage 11 On the two walls 5, 6 constituting the longitudinal channel 7, moves, over the entire length of the installation, a carriage 11 on which are fixed two uprights 12, 13 supporting at their upper end a plenum 14.
  • This is of generally parallelepiped shape and is connected, via a box 15, to a duct 16 at the end of which is connected a blower unit 17.
  • the duct 16 is a duct of variable length and can be, for example, a flexible circular sheath can be folded into an accordion.
  • the plenum 14 overhangs the grating 8 over a part of its length and over its entire width, thus delimiting a blowing area on the grating.
  • the surface of the plenum 14 facing the grating 8 is provided to receive a filter (not shown) which has the functions of purifying the air and making the flow of blowing air homogeneous.
  • Two brackets 18, 19 are provided to reinforce the fixing of the plenum 14 on the uprights 12, 13.
  • the carriage 11 consists of a box shown here, without limitation, by two stairs 20, 21, a platform 22 and two side walls 23, 24. It is intended to move over the entire length of the installation and comprises for this purpose two carrier rollers 25, 26 of which at least one is driven by a motor (not shown).
  • a mat 27 of elongated rectangular shape is stretched longitudinally between the two ends of the ventilation installation and covers, with part of its width, the entire length of the longitudinal channel 7 and, on the other part of its width, the part of the length of the transverse gutters 3 which is not covered by the grating 8. It passes under the starting steps of the stairs 20, 21 and inside the carriage 11. The path which it follows under the carriage is shown in more detail in Fig. 3.
  • the blower unit 17 draws the air outside and supplies it, via the duct 16 and the box 15, to the plenum 14. It can also raise its temperature, in particular in winter to heat the ventilation air.
  • the air in overpressure in the plenum 14 passes through the filter of the plenum, where it is purified and its flow made homogeneous, and is blown vertically on an area of the quail 8 below the blowing surface.
  • the suction fan 10 creates a depression in the longitudinal channel 7. However, outside the area where the carpet 27 passes under the carriage 11, the carpet 27 is kept pressed against the wall 5 obstructing the passage of air between the longitudinal channel 7 and the transverse channels 3.
  • the belt 27 is raised above the wall 5 and, as shown in Figs. 2 and 3, forms with the walls 23, 24 of the carriage 11 a passage between the transverse channels 3 and the longitudinal channel 7.
  • the vacuum created by the suction fan 10 in the longitudinal channel 7 is transmitted to the transverse channels 3 which are located under the plenum 14 (Fig. 3). Therefore, the air blown by the plenum 14 and loaded with polluting agents emitted on the work area passes through the grating 8, where it is purified by a dry filter (not shown), and is entrained in the transverse gutters 3. It then passes into the carriage 11, where, guided by the walls 23, 24 and the belt 27, it straddles the wall 5, and is driven in the longitudinal channel 7 to the chimney 9 where it is expelled.
  • the ventilated zone is located under the plenum 14. If the part to be treated is long, its treatment is carried out starting from one end and going to the other, which makes it necessary to move the ventilated zone . For this, it suffices to move, as the treatment progresses, the carriage 11 which then drives the plenum 14 and displaces the area where the mat 27 is raised. The extraction area is therefore moved and, this, together with the plenum.
  • the volume of air displaced is limited by the blowing surface of the plenum 14 and by the area of the extraction zone.
  • the power of the blower unit 17 and the suction fan 10 is independent of the length of the installation, which has an advantage compared to the installation of prior art.
  • the installation of the invention is accessible to handling machines on three sides of the ventilated area, which is advantageous when the parts to be treated are heavy and / or bulky.
  • the trolley at one end of the installation the surface of the grating is completely free for access with an overhead crane or another handling machine.
  • holes 32 are provided between the transverse channels 3 and the longitudinal channel 7 which have effect of permanently putting the areas not ventilated by the plenum 14 in depression. This depression is sufficient to allow most of the pollutants emitted after the treatment operation to be sucked into the transverse channels 3 and to pass through the longitudinal channel 7 before being expelled outside. It is, moreover, such that the concentration of pollutants in these non-ventilated areas corresponds to a level of pollution considered to be acceptable.
  • Ventilation installation for example, spray painting installations or application of synthetic resins, sanding or deburring operations, etc.

Abstract

The invention relates to a movable ventilation system provided for a work station whose atmosphere is vitiated by solvent vapour, toxic gases or dust from which it is desired to protect the operators of the workstation. This system comprises a blowing plenum (14) overhanging a grating floor (8) mounted over a pit (1) which is maintained under a reduced pressure in order to form an extraction area where the air blown by the plenum (14) and laden with polluting agents emitted in the work zone is extracted. The plenum (14) has a blowing surface area less than the total surface area of the pit (1) of the system and is mounted on a plenum-supporting carriage (11) which can move along the entire length of the system. Means (3, 7, 11, 27) are provided for limiting the extraction area on the grating floor (8) to an area corresponding substantially to the blowing surface area of the plenum (14) projected onto the grating floor (8), this area moving in conjunction with the carriage supporting the plenum (14). Applications to systems using paint spray-guns, application of synthetic resins, sanding or deburring operations etc. <IMAGE>

Description

La présente invention concerne une installation mobile de ventilation prévue pour un poste de travail dont l'atmosphère est viciée par des vapeurs de solvant, des gaz toxiques ou des poussières dont on veut protéger les opérateurs du poste.The present invention relates to a mobile ventilation installation provided for a work station whose atmosphere is vitiated by solvent vapors, toxic gases or dust which we want to protect the operators of the station.

On connaît des installations de ce type. Par exemple, le document FR-A-2 551 366 décrit une installation de ventilation pour une cabine de peinture constituée d'une enceinte fermée surmontée d'un plénum de ventilation soufflant de l'air dans ladite cabine, cet air, chargé des polluants émis sur la zone de travail, étant aspiré par le plancher. Les installations de ce type assurent une ventilation et une extraction des agents polluants sur l'ensemble du volume de la cabine.Installations of this type are known. For example, document FR-A-2 551 366 describes a ventilation installation for a paint booth consisting of a closed enclosure surmounted by a ventilation plenum blowing air into said booth, this air, charged with pollutants emitted on the work area, being vacuumed by the floor. Installations of this type provide ventilation and extraction of pollutants over the entire volume of the cabin.

Elles sont parfaitement adaptées à des postes de travail où l'on effectue des traitements sur des pièces de faibles dimensions. En effet, pour assurer une ventilation descendante efficace, il faut que la vitesse de l'air soufflé ait une valeur au moins égale à celle qui permet l'évacuation de la plus grande partie des polluants émis dans l'atmosphère avant qu'ils ne soient respirés par les opérateurs. Or, le débit d'air soufflé est proportionnel, d'une part, à cette vitesse et, d'autre part, à la surface ventilée et peut donc, dans le cas où les dimensions des pièces à traiter sont importantes, atteindre des valeurs particulièrement élevées. Ces grandes valeurs de débit d'air soufflé impliquent des consommations d'énergie élevées, d'autant plus qu'il faut prévoir, pour l'hiver, un système de réchauffement de l'air aspiré. Les installations du type décrit dans le document mentionné ci-dessus demandent alors une puissance installée importante ce qui se traduit par des coûts d'investissement et d'exploitation élevés.They are perfectly suited to workstations where treatments are carried out on small parts. In fact, to ensure effective downdraft ventilation, the speed of the blown air must be at least equal to that which allows most of the pollutants emitted into the atmosphere to be removed before they are breathed by operators. However, the supply air flow is proportional, on the one hand, to this speed and, on the other hand, to the ventilated surface and can therefore, in the case where the dimensions of the parts to be treated are large, reach values particularly high. These large supply air flow values imply high energy consumption, all the more it is necessary to provide, for winter, a system for heating the intake air. Installations of the type described in the document mentioned above therefore require significant installed power, which results in high investment and operating costs.

On a tenté de pallier ces inconvénients en fractionnant le volume de la cabine en compartiments dont chacun est relié à un plénum. Le document FR-A-2 534 155 décrit, par exemple, une cabine de peinture comportant des compartiments reliés, chacun, à une canalisation de soufflage d'air et à une canalisation d'extraction aux moyens d'obturateurs qui peuvent être commandés pour limiter la zone ventilée à un seul de ces compartiments. Lorsque les pièces sont longues, le poste de travail se déplace le long de cette pièce et les obturateurs sont commandés pour ventiler le seul compartiment où il se trouve. Des économies d'énergie substantielles sont réalisées avec des installa­tions de ce type.We tried to overcome these drawbacks by dividing the volume of the cabin into compartments, each of which is connected to a plenum. The document FR-A-2,534,155 describes, for example, a paint booth comprising compartments each connected to an air supply duct and to an extraction duct with shutter means which can be controlled for limit the ventilated area to only one of these compartments. When the rooms are long, the work station moves along this room and the shutters are controlled to ventilate the only compartment where it is located. Substantial energy savings are achieved with installations of this type.

Néanmoins, elles présentent l'inconvénient de ne pas être accessibles à des engins de manutention, tels que des ponts roulants. En effet, dans le cas de traitement de pièces de grands volumes et/ou poids, il est souhaitable de disposer d'engins qui peuvent les déposer et/ou les déplacer, ce qui nécessite de prévoir l'accessibilité de l'installation selon au moins trois côtés.However, they have the drawback of not being accessible to handling equipment, such as overhead traveling cranes. Indeed, in the case of treatment of parts of large volumes and / or weight, it is desirable to have machines which can deposit and / or move them, which requires providing for the accessibility of the installation according to the minus three sides.

L'invention a pour but de proposer une installation de ventila­tion qui ne présente pas les inconvénients mentionnés ci-dessus. L'objet de l'invention est de prévoir une installation de ventilation dont la puissance installée est faible par rapport aux installations de l'art antérieur présentant la même surface au sol, dont la surface ventilée peut se déplacer en même temps que la zone de travail, et qui est accessible par des engins de manutention.The object of the invention is to propose a ventilation installation which does not have the drawbacks mentioned above. The object of the invention is to provide a ventilation installation whose installed power is low compared to the installations of the prior art having the same floor area, the ventilated surface of which can move at the same time as the area of work, and which is accessible by handling equipment.

L'invention concerne donc une installation de ventilation d'une zone de travail comprenant un plénum de soufflage surplombant un caillebotis monté sur une fosse maintenue en dépression pour former une aire d'extraction où l'air soufflé par le plénum et chargé des agents polluants émis sur la zone de travail est extrait.The invention therefore relates to an installation for ventilating a work area comprising a blowing plenum overhanging a grating mounted on a pit maintained in depression to form an extraction area where the air blown by the plenum and charged with pollutants emitted on the work area is extracted.

Selon une caractéristique de l'invention, le plénum présente une surface de soufflage inférieure à la surface totale de la fosse de l'installation et est monté sur un chariot porte-plénum pouvant se déplacer sur toute la longueur de l'installation, et des moyens sont prévus pour limiter l'aire d'extraction sur le caillebotis à une aire correspondant sensiblement à la surface de soufflage du plénum projetée sur le caillebotis, cette aire se déplaçant conjointement avec le chariot supportant le plénum.According to a characteristic of the invention, the plenum has a blowing surface less than the total surface of the installation pit and is mounted on a plenum-carrying carriage which can move over the entire length of the installation, and means are provided to limit the extraction area on the grating to an area substantially corresponding to the blowing surface of the plenum projected on the grating, this area moving together with the carriage supporting the plenum.

Selon une autre caractéristique de l'invention, la fosse est divisée par des murets transversaux formant deux à deux des caniveaux transversaux, ces murets reliant un muret formant l'un des bords longitudinaux de la fosse à un second muret constituant, avec le muret de l'autre bord longitudinal de la fosse, un caniveau longitudinal, ce caniveau longitudinal étant maintenu en dépression au moyen d'un ventilateur d'aspiration, et les moyens pour limiter l'aire d'extrac­tion consistent à établir une communication entre les caniveaux transversaux qui se trouvent sous le plénum et le caniveau longitudi­nal, et d'obturer le passage de l'air entre les caniveaux transversaux qui ne se trouvent pas sous le plénum et le caniveau longitudinal.According to another characteristic of the invention, the pit is divided by transverse walls forming two by two transverse gutters, these walls connecting a wall forming one of the longitudinal edges of the pit to a second wall constituting, with the wall of the other longitudinal edge of the pit, a longitudinal channel, this longitudinal channel being maintained in depression by means of a suction fan, and the means for limiting the extraction area consist in establishing communication between the transverse channels which are under the plenum and the longitudinal channel, and block the passage of air between the transverse channels which are not under the plenum and the longitudinal channel.

Selon une autre caractéristique de l'invention, les moyens pour limiter l'aire d'extraction comprennent un tapis qui est tendu longitudinalement entre les deux extrémités de l'installation de ventilation, qui recouvre, d'une partie de sa largeur, le caniveau longitudinal et, de l'autre partie de sa largeur, une partie de la longueur des caniveaux transversaux, qui est plaquée contre le muret séparant les caniveaux transversaux du caniveau longitudinal ce qui obstrue le passage de l'air entre ces caniveaux, et qui passe sous le chariot porte-plénum où il est soulevé pour constituer avec les parois latérales dudit chariot un passage entre le caniveau longitudinal et les caniveaux transversaux se trouvant sous le plénum, afin de maintenir en dépression la surface du caillebotis qui se trouve juste en dessous de la surface de soufflage du plénum, l'air soufflé et chargé des polluants émis sur la zone de travail étant alors entraîné dans les caniveaux transversaux puis dans le caniveau longitudinal avant d'être expulsé.According to another characteristic of the invention, the means for limiting the extraction area comprise a mat which is stretched longitudinally between the two ends of the ventilation installation, which covers, with part of its width, the gutter longitudinal and, on the other part of its width, part of the length of the transverse channels, which is pressed against the wall separating the transverse channels from the longitudinal channel which obstructs the passage of air between these channels, and which passes under the plenum-carrying carriage where it is lifted to form a passage between the longitudinal channel and the transverse channels located under the plenum with the side walls of said carriage, in order to maintain the surface of the grating which is just below the blowing surface of the plenum, the air blown and charged with pollutants emitted on the work area being then entrained in the transverse gutters then in dan s the longitudinal channel before being expelled.

Selon une autre caractéristique de l'invention, des ouvertures sont prévues dans le muret séparant les caniveaux transversaux et le caniveau longitudinal afin de maintenir au moins une dépression minimale prédéterminée sur la surface du caillebotis.According to another characteristic of the invention, openings are provided in the wall separating the transverse channels and the longitudinal channel in order to maintain at least a predetermined minimum depression on the surface of the grating.

Selon une autre caractéristique de l'invention, le tapis est soulevé sous le chariot porte-plénum aux moyens de rouleaux.According to another characteristic of the invention, the mat is raised under the plenum-carrying carriage by means of rollers.

Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation préféré de l'inven­tion, ladite description étant faite en relation avec les dessins joints, parmi lesquels:

  • la Fig. 1 représente une vue en perspective d'une installation de ventilation d'une zone de travail selon l'invention,
  • la Fig. 2 est une vue en coupe selon l'axe II/II de la Fig. 1 et
  • la Fig. 3 est une vue en coupe selon l'axe III/III de la Fig. 2.
The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of a preferred embodiment of the invention, said description being made in relation to the accompanying drawings, among which:
  • Fig. 1 represents a perspective view of a ventilation installation of a work area according to the invention,
  • Fig. 2 is a sectional view along the axis II / II of FIG. 1 and
  • Fig. 3 is a sectional view along the axis III / III of FIG. 2.

L'installation de ventilation représentée à la Fig. 1 comprend une fosse 1 divisée par des murets transversaux 2 formant deux à deux des caniveaux transversaux 3 dont le nombre est proportionnel à la longueur de l'installation de ventilation. Les murets transversaux 2 relient un muret 4 formant l'un des deux bords longitudinaux de la fosse à un muret 5. Le muret 5 et un muret 6 constituant l'autre bord longitudinal de la fosse 1, forment un caniveau longitudinal 7 bordant l'installation. Les caniveaux transversaux 3 sont recouverts d'un caillebotis 8 de longueur égale à celle de la fosse 1 et de largeur inférieure, pour des raisons mentionnées ci-dessous, à la longueur des murets transversaux 3. En bout du caniveau longitudinal 7, est montée une cheminée d'extraction 9 à l'intérieur de laquelle est placé un ventilateur d'aspiration 10 maintenant ledit caniveau longitudinal 7 en dépression.The ventilation system shown in FIG. 1 comprises a pit 1 divided by transverse walls 2 forming two by two transverse channels 3, the number of which is proportional to the length of the ventilation installation. The transverse walls 2 connect a wall 4 forming one of the two longitudinal edges of the pit to a wall 5. The wall 5 and a wall 6 constituting the other longitudinal edge of the pit 1, form a longitudinal channel 7 bordering the installation. The transverse channels 3 are covered with a grating 8 of length equal to that of the pit 1 and of smaller width, for reasons mentioned below, to the length of the transverse walls 3. At the end of the longitudinal channel 7, is mounted an extraction chimney 9 inside which is placed a suction fan 10 maintaining said longitudinal channel 7 in depression.

Sur les deux murets 5, 6 constituant le caniveau longitudinal 7, se déplace, sur toute la longueur de l'installation, un chariot 11 sur lequel sont fixés deux montants 12, 13 supportant à leur extrémité supérieure un plénum 14. Celui-ci est de forme générale parallélépipè­dique et est relié, par l'intermédiaire d'un caisson 15, à une gaine 16 au bout de laquelle est branchée une centrale soufflante 17. La gaine 16 est une gaine à longueur variable et peut être, par exemple, une gaine circulaire souple pouvant se replier en accordéon. Le plénum 14 surplombe le caillebotis 8 sur une partie de st longueur et sur toute sa largeur, délimitant ainsi une aire de soufflage sur le caillebotis. La surface du plénum 14 tournée vers le caillebotis 8 est prévue pour recevoir un filtre (non représenté) qui a pour fonctions de purifier l'air et de rendre le flux d'air de soufflage homogène. Deux équerres 18, 19 sont prévues pour renforcer la fixation du plénum 14 sur les montants 12, 13.On the two walls 5, 6 constituting the longitudinal channel 7, moves, over the entire length of the installation, a carriage 11 on which are fixed two uprights 12, 13 supporting at their upper end a plenum 14. This is of generally parallelepiped shape and is connected, via a box 15, to a duct 16 at the end of which is connected a blower unit 17. The duct 16 is a duct of variable length and can be, for example, a flexible circular sheath can be folded into an accordion. The plenum 14 overhangs the grating 8 over a part of its length and over its entire width, thus delimiting a blowing area on the grating. The surface of the plenum 14 facing the grating 8 is provided to receive a filter (not shown) which has the functions of purifying the air and making the flow of blowing air homogeneous. Two brackets 18, 19 are provided to reinforce the fixing of the plenum 14 on the uprights 12, 13.

Le chariot 11 est constitué d'un caisson représenté ici, de façon non limitative, par deux escaliers 20, 21, une plate-forme 22 et deux parois latérales 23, 24. Il est prévu pour se déplacer sur toute la longueur de l'installation et comporte à cet effet deux rouleaux porteurs 25, 26 dont l'un au moins est mu par un moteur (non représenté).The carriage 11 consists of a box shown here, without limitation, by two stairs 20, 21, a platform 22 and two side walls 23, 24. It is intended to move over the entire length of the installation and comprises for this purpose two carrier rollers 25, 26 of which at least one is driven by a motor (not shown).

Un tapis 27 de forme rectangulaire allongée est tendu longitudi­nalement entre les deux extrémités de l'installation de ventilation et recouvre, d'une partie de sa largeur, toute la longueur du caniveau longitudinal 7 et, de l'autre partie de sa largeur, la partie de la longueur des caniveaux transversaux 3 qui n'est pas recouverte par le caillebotis 8. Il passe sous les marches de départ des escaliers 20, 21 et à l'intérieur du chariot 11. Le trajet qu'il suit sous le chariot est montré plus en détail à la Fig. 3. En partant de la gauche de cette figure, on voit qu'il entre sous la marche de départ de l'escalier 20, est dévié par un rouleau 28 pour être envoyé sur un second rouleau 29 qui l'élève pratiquement au niveau de la plate-forme 22, passe par un troisième rouleau 30 où il est renvoyé vers un quatrième rouleau 31 le plaçant au niveau du caillebotis 8 et sort du chariot 11 en passant au-dessous de la marche de départ de l'escalier 21.A mat 27 of elongated rectangular shape is stretched longitudinally between the two ends of the ventilation installation and covers, with part of its width, the entire length of the longitudinal channel 7 and, on the other part of its width, the part of the length of the transverse gutters 3 which is not covered by the grating 8. It passes under the starting steps of the stairs 20, 21 and inside the carriage 11. The path which it follows under the carriage is shown in more detail in Fig. 3. Starting from the left of this figure, we see that it enters under the starting step of the staircase 20, is deflected by a roller 28 to be sent to a second roller 29 which raises it practically to the level of the platform 22, passes through a third roller 30 where it is returned to a fourth roller 31 placing it at the level of the grating 8 and leaves the carriage 11 passing below the starting step of the staircase 21.

Le fonctionnement de l'installation de ventilation selon l'inven­tion est maintenant décrit. La centrale soufflante 17 aspire l'air à l'extérieur et le fournit, via la gaine 16 et le caisson 15, au plénum 14. Elle peut également élever sa température, en particulier en hiver pour réchauffer l'air de ventilation. L'air en surpression dans le plénum 14 passe à travers le filtre du plénum, où il est purifié et son flux rendu homogène, et est soufflé verticalement sur une aire du cailleboitis 8 à l'aplomb de la surface de soufflage. Le ventilateur d'aspiration 10 crée une dépression dans le caniveau longitudinal 7. Or, en dehors de la zone où le tapis 27 passe sous le chariot 11, le tapis 27 est maintenu plaqué contre le muret 5 obstruant le passage de l'air entre le caniveau longitudinal 7 et les caniveaux tranversaux 3. Par contre, sous le chariot 11, le tapis 27 est soulevé au-dessus du muret 5 et, comme le montrent les Figs. 2 et 3, forme avec les parois 23, 24 du chariot 11 un passage entre les caniveaux transversaux 3 et le caniveau longitudinal 7. Ainsi, la dépression créée par le ventilateur d'aspiration 10 dans le caniveau longitudinal 7 est transmise aux caniveaux transversaux 3 qui se trouvent sous le plénum 14 (Fig. 3). De ce fait, l'air soufflé par le plénum 14 et chargé des agents polluants émis sur la zone de travail passe à travers le caillebotis 8, où il est purifié par un filtre sec (non représenté), et est entraîné dans les caniveaux transversaux 3. Il passe ensuite dans le chariot 11, où, guidé par les parois 23, 24 et le tapis 27, il chevauche le muret 5, et est entraîné dans le caniveau longitudinal 7 jusqu'à la cheminée 9 où il est expulsé.The operation of the ventilation installation according to the invention is now described. The blower unit 17 draws the air outside and supplies it, via the duct 16 and the box 15, to the plenum 14. It can also raise its temperature, in particular in winter to heat the ventilation air. The air in overpressure in the plenum 14 passes through the filter of the plenum, where it is purified and its flow made homogeneous, and is blown vertically on an area of the quail 8 below the blowing surface. The suction fan 10 creates a depression in the longitudinal channel 7. However, outside the area where the carpet 27 passes under the carriage 11, the carpet 27 is kept pressed against the wall 5 obstructing the passage of air between the longitudinal channel 7 and the transverse channels 3. By cons, under the carriage 11, the belt 27 is raised above the wall 5 and, as shown in Figs. 2 and 3, forms with the walls 23, 24 of the carriage 11 a passage between the transverse channels 3 and the longitudinal channel 7. Thus, the vacuum created by the suction fan 10 in the longitudinal channel 7 is transmitted to the transverse channels 3 which are located under the plenum 14 (Fig. 3). Therefore, the air blown by the plenum 14 and loaded with polluting agents emitted on the work area passes through the grating 8, where it is purified by a dry filter (not shown), and is entrained in the transverse gutters 3. It then passes into the carriage 11, where, guided by the walls 23, 24 and the belt 27, it straddles the wall 5, and is driven in the longitudinal channel 7 to the chimney 9 where it is expelled.

Avec cette installation, la zone ventilée se trouve sous le plénum 14. Si la pièce à traiter est longue, son traitement est réalisé en partant d'un bout et en allant à l'autre, ce qui rend nécessaire le déplacement de la zone ventilée. Pour cela, il suffit de déplacer, au fur et à mesure du cours du traitement, le chariot 11 qui entraîne alors le plénum 14 et déplace la zone où le tapis 27 est soulevé. L'aire d'extraction est donc déplacée et, cela, conjointement au plénum.With this installation, the ventilated zone is located under the plenum 14. If the part to be treated is long, its treatment is carried out starting from one end and going to the other, which makes it necessary to move the ventilated zone . For this, it suffices to move, as the treatment progresses, the carriage 11 which then drives the plenum 14 and displaces the area where the mat 27 is raised. The extraction area is therefore moved and, this, together with the plenum.

Le volume d'air déplacé est limité par la surface de soufflage du plénum 14 et par l'aire de la zone d'extraction. Aux pertes de charge près dans la gaine 16 et dans le caniveau longitudinal 7, la puissance de la centrale soufflante 17 et du ventilateur d'aspiration 10 est indépendante de la longueur de l'installation, ce qui présente un avantage par rapport aux installations de l'art antérieur.The volume of air displaced is limited by the blowing surface of the plenum 14 and by the area of the extraction zone. At the head losses near the duct 16 and in the longitudinal channel 7, the power of the blower unit 17 and the suction fan 10 is independent of the length of the installation, which has an advantage compared to the installation of prior art.

Par ailleurs, l'installation de l'invention est accessible à des engins de manutention selon trois côtés de la zone ventilée, ce qui est avantageux lorsque les pièces à traiter sont lourdes et/ou volumineuses. De plus, en déplaçant le chariot à une extrémité de l'installation, la surface du caillebotis est totalement libre pour un accès avec un pont roulant ou un autre engin de manutention.Furthermore, the installation of the invention is accessible to handling machines on three sides of the ventilated area, which is advantageous when the parts to be treated are heavy and / or bulky. In addition, by moving the trolley at one end of the installation, the surface of the grating is completely free for access with an overhead crane or another handling machine.

Dans le cas de traitements où l'émanation de produits toxiques a encore lieu après l'opération de traitement en elle-même, le fait d'avoir déplacé le chariot 11 pour suivre la zone où cette opération est réalisée, implique que les zones qui ont été traitées et qui dégagent donc encore des agents polluants ne sont plus ventilées. Pour remédier à cet inconvénient, on a prévu des trous 32 entre les caniveaux transversaux 3 et le caniveau longitudinal 7 qui ont pour effet de mettre en permanence les zones non ventilées par le plénum 14 en dépression. Cette dépression est suffisante pour permettre à la majeure partie des agents polluants émis après l'opération de traitement d'être aspirée dans les caniveaux transversaux 3 et de passer par le caniveau longitudinal 7 avant d'être expulsée à l'extérieur. Elle est, par ailleurs, telle que la concentration de polluants dans ces zones non ventilées corresponde à un niveau de pollution considéré comme acceptable.In the case of treatments where the emanation of toxic products still takes place after the treatment operation itself, the fact of having moved the carriage 11 to follow the zone where this operation is carried out, implies that the zones which have been treated and which therefore release pollutants are no longer broken down. To remedy this drawback, holes 32 are provided between the transverse channels 3 and the longitudinal channel 7 which have effect of permanently putting the areas not ventilated by the plenum 14 in depression. This depression is sufficient to allow most of the pollutants emitted after the treatment operation to be sucked into the transverse channels 3 and to pass through the longitudinal channel 7 before being expelled outside. It is, moreover, such that the concentration of pollutants in these non-ventilated areas corresponds to a level of pollution considered to be acceptable.

Les applications d'une installation de ventilation selon l'inven­tion sont nombreuses, par exemple, des installations de peinture au pistolet ou d'application de résines synthétiques, d'opérations de ponçage ou d'ébarbage, etc.There are many applications of a ventilation installation according to the invention, for example, spray painting installations or application of synthetic resins, sanding or deburring operations, etc.

Claims (5)

1) Installation de ventilation d'une zone de travail comprenant un plénum de soufflage surplombant un caillebotis monté sur une fosse maintenue en dépression pour former une aire d'extraction où l'air soufflé par le plénum et chargé des agents polluants émis sur la zone de travail est extrait, caractérisée en ce que le plénum (14) présente une surface de soufflage inférieure à la surface totale de la fosse (1) de l'installation et est monté sur un chariot porte-plénum (11) pouvant se déplacer sur toute la longueur de l'installation, et en ce que des moyens (3, 7, 11, 27) sont prévus pour limiter l'aire d'extraction sur le caillebotis (8) à une aire correspondant sensiblement à la surface de soufflage du plénum (14) projetée sur le caillebotis (8), cette aire se déplaçant conjointement avec le chariot (11) supportant le plénum (14).1) Installation of ventilation of a work area comprising a blowing plenum overhanging a grating mounted on a pit maintained in depression to form an extraction area where the air blown by the plenum and loaded with pollutants emitted on the area is extracted, characterized in that the plenum (14) has a blowing surface less than the total surface of the installation pit (1) and is mounted on a plenum-carrying carriage (11) which can move on the entire length of the installation, and in that means (3, 7, 11, 27) are provided to limit the extraction area on the grating (8) to an area corresponding substantially to the blowing surface of the plenum (14) projected onto the grating (8), this area moving together with the carriage (11) supporting the plenum (14). 2) Installation de ventilation selon la revendication 1, caractérisée en ce que la fosse (1) est divisée par des murets transversaux (2) formant deux à deux des caniveaux transversaux (3), ces murets (2) reliant un muret (4) formant l'un des bords longitudinaux de la fosse (1) à un second muret (5) constituant, avec le muret (6) de l'autre bord longitudinal de la fosse (1), un caniveau longitudinal (7), ce caniveau longitudinal étant maintenu en dépres­sion au moyen d'un ventilateur d'aspiration (10), et les moyens pour limiter l'aire d'extraction consistent à établir une communication entre les caniveaux transversaux (3) qui se trouvent sous le plénum et le caniveau longitudinal (7), et d'obturer le passage de l'air entre les caniveaux transversaux (3) qui ne se trouvent pas sous le plénum (14) et le caniveau longitudinal (7).2) ventilation installation according to claim 1, characterized in that the pit (1) is divided by transverse walls (2) forming two by two of the transverse gutters (3), these walls (2) connecting a wall (4) forming one of the longitudinal edges of the pit (1) to a second wall (5) constituting, with the wall (6) of the other longitudinal edge of the pit (1), a longitudinal channel (7), this channel longitudinal being maintained in depression by means of a suction fan (10), and the means for limiting the extraction area consist in establishing communication between the transverse channels (3) which are located under the plenum and the channel longitudinal (7), and to close the air passage between the transverse channels (3) which are not located under the plenum (14) and the longitudinal channel (7). 3) Installation de ventilation selon la revendication 2, caractérisée en ce que les moyens pour limiter l'aire d'extraction comprennent un tapis (27) qui est tendu longitudinalement entre les deux extrémités de l'installation de ventilation, qui recouvre, d'une partie de sa largeur, le caniveau longitudinal (7) et, de l'autre partie de sa largeur, une partie de la longueur des caniveaux transversaux (3), qui est plaquée contre le muret (5) séparant les caniveaux transversaux (3) du caniveau longitudinal (7) ce qui obstrue le passage de l'air entre ces caniveaux, et qui passe sous le chariot porte-plénum (11) où il est soulevé pour constituer avec les parois latérales (23, 24) dudit chariot (11) un passage entre le caniveau longitudinal (7) et les caniveaux transversaux (3) se trouvant sous le plénum (14), afin de maintenir en dépression la surface du caillebotis (8) qui se trouve juste en dessous de la surface de soufflage du plénum (14), l'air soufflé et chargé des polluants émis sur la zone de travail étant alors entraîné dans les caniveaux transversaux (3) puis dans le caniveau longitudinal (7) avant d'être expulsé.3) Ventilation installation according to claim 2, characterized in that the means for limiting the extraction area comprise a mat (27) which is stretched longitudinally between the two ends of the ventilation installation, which covers, part of its width, the longitudinal channel (7) and part of its width, part of the length of the transverse channels (3), which is pressed against the wall (5) separating the transverse channels (3 ) of the longitudinal channel (7) which obstructs the passage of air between these channels, and which passes under the plenum-carrying carriage (11) where it is raised to form with the walls lateral (23, 24) of said carriage (11) a passage between the longitudinal channel (7) and the transverse channels (3) located under the plenum (14), in order to maintain in depression the surface of the grating (8) which is located just below the blowing surface of the plenum (14), the air blown and charged with the pollutants emitted on the work area then being entrained in the transverse gutters (3) then in the longitudinal gutter (7) before to be kicked out. 4) Installation selon la revendication 2 ou 3, caractérisée en ce que des ouvertures sont prévues dans le muret (5) séparant les caniveaux transversaux (3) et le caniveau longitudinal (7) afin de maintenir au moins une dépression minimale pré déterminée sur la surface du caillebotis (8).4) Installation according to claim 2 or 3, characterized in that openings are provided in the wall (5) separating the transverse channels (3) and the longitudinal channel (7) in order to maintain at least a predetermined minimum depression on the grating surface (8). 5) Installation de ventilation selon la revendication 3 ou 4, caractérisée en ce que le tapis (27) est soulevé sous le chariot porte-plénum (11) aux moyens de rouleaux (28, 29, 30, 31).5) A ventilation installation according to claim 3 or 4, characterized in that the mat (27) is raised under the plenum-carrying carriage (11) by means of rollers (28, 29, 30, 31).
EP90402666A 1989-10-11 1990-09-27 Mobile ventilating system Expired - Lifetime EP0422980B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90402666T ATE87508T1 (en) 1989-10-11 1990-09-27 MOBILE VENTILATION SYSTEM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8913514 1989-10-11
FR8913514A FR2652882B1 (en) 1989-10-11 1989-10-11 MOBILE VENTILATION SYSTEM.

Publications (2)

Publication Number Publication Date
EP0422980A1 true EP0422980A1 (en) 1991-04-17
EP0422980B1 EP0422980B1 (en) 1993-03-31

Family

ID=9386448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402666A Expired - Lifetime EP0422980B1 (en) 1989-10-11 1990-09-27 Mobile ventilating system

Country Status (4)

Country Link
EP (1) EP0422980B1 (en)
AT (1) ATE87508T1 (en)
DE (1) DE69001230T2 (en)
FR (1) FR2652882B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692028A1 (en) * 1992-06-05 1993-12-10 Allaire Emile Ventilation plant main chamber air feed system - has strip covering feed channel which is raised by rollers inside sleeve to connect channel with main chamber
EP0679444A2 (en) * 1994-04-29 1995-11-02 Belmeko Engineering Nv Apparatus for treatment with forced air circulation
EP1248050A2 (en) * 2001-04-02 2002-10-09 Granzotto S.r.l. Extraction system, particularly for extracting noxious gases from spaces located partially below ground level
GB2487549A (en) * 2011-01-26 2012-08-01 Spraybooth Technology Ltd Spray booth with underfloor air extraction ducts
EP3009195A1 (en) * 2014-10-13 2016-04-20 Ferrara, Salvatore A varnishing plant for body shops

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006001384A1 (en) * 2006-01-11 2007-07-12 SLF Oberflächentechnik GmbH Air ventilation system by such as a paint shop building has work area improved by internal circulating fan units

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976716C (en) * 1951-09-22 1964-03-19 Benno Schilde Maschb Ag Device for ventilating closed rooms with locally changing accumulation of dust, mist, fumes and similar substances
FR2209533A1 (en) * 1972-12-11 1974-07-05 Hawley Manufacturing Corp
FR2534155A1 (en) * 1982-10-06 1984-04-13 Michaud Et Cie Ateliers Divided painting chamber having mechanical ventilation.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976716C (en) * 1951-09-22 1964-03-19 Benno Schilde Maschb Ag Device for ventilating closed rooms with locally changing accumulation of dust, mist, fumes and similar substances
FR2209533A1 (en) * 1972-12-11 1974-07-05 Hawley Manufacturing Corp
FR2534155A1 (en) * 1982-10-06 1984-04-13 Michaud Et Cie Ateliers Divided painting chamber having mechanical ventilation.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692028A1 (en) * 1992-06-05 1993-12-10 Allaire Emile Ventilation plant main chamber air feed system - has strip covering feed channel which is raised by rollers inside sleeve to connect channel with main chamber
EP0679444A2 (en) * 1994-04-29 1995-11-02 Belmeko Engineering Nv Apparatus for treatment with forced air circulation
EP0679444A3 (en) * 1994-04-29 1996-06-19 Belmeko Engineering Nv Apparatus for treatment with forced air circulation.
BE1009133A3 (en) * 1994-04-29 1996-12-03 Belmeko Engineering Nv Treatment device with forced air circulation.
EP1248050A2 (en) * 2001-04-02 2002-10-09 Granzotto S.r.l. Extraction system, particularly for extracting noxious gases from spaces located partially below ground level
EP1248050A3 (en) * 2001-04-02 2003-01-02 Granzotto S.r.l. Extraction system, particularly for extracting noxious gases from spaces located partially below ground level
GB2487549A (en) * 2011-01-26 2012-08-01 Spraybooth Technology Ltd Spray booth with underfloor air extraction ducts
EP3009195A1 (en) * 2014-10-13 2016-04-20 Ferrara, Salvatore A varnishing plant for body shops
US9751103B2 (en) 2014-10-13 2017-09-05 Salvatore Ferrara Varnishing plant for body shops

Also Published As

Publication number Publication date
ATE87508T1 (en) 1993-04-15
DE69001230T2 (en) 1993-11-04
FR2652882A1 (en) 1991-04-12
DE69001230D1 (en) 1993-05-06
FR2652882B1 (en) 1993-04-23
EP0422980B1 (en) 1993-03-31

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