EP1558878B1 - Dispositif d'inspection destine a des conduits d'acheminement pour milieux aeriformes - Google Patents

Dispositif d'inspection destine a des conduits d'acheminement pour milieux aeriformes Download PDF

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Publication number
EP1558878B1
EP1558878B1 EP02760559A EP02760559A EP1558878B1 EP 1558878 B1 EP1558878 B1 EP 1558878B1 EP 02760559 A EP02760559 A EP 02760559A EP 02760559 A EP02760559 A EP 02760559A EP 1558878 B1 EP1558878 B1 EP 1558878B1
Authority
EP
European Patent Office
Prior art keywords
frame
wall
duct
inspection
illumination means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02760559A
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German (de)
English (en)
Other versions
EP1558878A1 (fr
Inventor
Giuseppe Librizzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALP SRL
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ALP SRL
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Publication date
Application filed by ALP SRL filed Critical ALP SRL
Priority to AT02760559T priority Critical patent/ATE344427T1/de
Publication of EP1558878A1 publication Critical patent/EP1558878A1/fr
Application granted granted Critical
Publication of EP1558878B1 publication Critical patent/EP1558878B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/029—Duct comprising an opening for inspection, e.g. manhole
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements

Definitions

  • the subject of the present invention is an inspection device for ducts for aeriform media, in particular, air in climate-control, air-conditioning, heating, ventilation, and air-extraction and air-exchange systems.
  • the ducts require frequent inspection and cleaning operations at intervals which are variable and difficult to define.
  • An inspection door is usually constituted by two plastics shells with dimensions larger than the dimensions of the access opening, the two shells being superimposed and connected to one another by means of screws which can move the shells towards one another and apart so that one shell can be positioned on the inside and the other on the outside of the wall including the access opening and the shells can be tightened against the wall from both sides in order to close the opening therein.
  • the object of the present invention is therefore to propose an inspection device for conveyor ducts for aeriform media, in particular air, having characteristics such as to overcome the problems mentioned with reference to the prior art.
  • a inspection device for conveyor duct for aeriform media in particular for air in climate-control, air-conditioning and air-exchange systems, comprising a porthole element of substantially transparent material and a frame which can be connected to a wall of the conveyor duct in the region of an access opening provided in the wall, in a manner such that the porthole element is superimposed on the access opening and the access opening is substantially hermetically closed, illumination means, directed towards the interior of the conveyor duct, being provided an being suitable for illuminating a conveying space therein, permitting visual inspection thereof, both when the system is idle and when the system is in operation.
  • an inspection device for a conveyor duct is generally indicated 1.
  • the inspection device 1 comprises a porthole element 2 of substantially transparent material, for example, glass or plastics material, and a frame 3 to be connected to a wall 4 of the conveyor duct in the region of an access opening 6 provided in the wall 4, in a manner such that the porthole element 2 is superimposed on the access opening 6 and the access opening 6 is closed.
  • the inspection device 1 advantageously has illumination means, preferably an electric lamp 7 which can be supplied with energy, for example, by means of an electrical cable connected to the mains or to a battery, the illumination means 7 being directed towards the interior of the conveyor duct and being suitable for illuminating a conveying space therein to permit inspection thereof.
  • illumination means preferably an electric lamp 7 which can be supplied with energy, for example, by means of an electrical cable connected to the mains or to a battery, the illumination means 7 being directed towards the interior of the conveyor duct and being suitable for illuminating a conveying space therein to permit inspection thereof.
  • the porthole element 2 is connected to the frame 3 releasably, preferably by threaded or bayonet means, to permit the opening and closure of an inspection opening 8 delimited by the frame 3 and to afford access to the interior of the conveyor duct through the inspection opening 8.
  • the frame 3 preferably has a substantially annular shape with an inner surface 13 which faces towards the interior of the conveyor duct, is substantially smooth, and is preferably chamfered around its outer periphery 14 in order advantageously to reduce the resistance to the airflow and to prevent the formation of recesses which lead to the deposition of dirt and to the harbouring of bacteria.
  • the inspection opening 8 of the frame 3 is delimited by an inner edge 15 of a shape substantially complementary with the periphery 9 of the porthole element 2 and, in particular, with the step 11, for which it forms a support.
  • the periphery 9 and the inner edge 15 have complementary shapes such that an inner surface 16 of the porthole element 2 is substantially aligned with the inner surface 13 of the frame 3 in order to form a substantially uniform and preferably smooth and uninterrupted internal surface of the inspection device 1.
  • the frame 3 advantageously has inner tongues 16 projecting substantially radially towards the centre of the frame 3 and preferably arranged at regular intervals around the inspection opening 8 in positions corresponding to the positions of the outer tongues 10 of the porthole element.
  • the intervals between the inner tongues 16 permit the insertion of the outer tongues 10 of the porthole element during the movement of the latter towards the frame 3.
  • Rotation of the porthole element 2 for example, by means of one or more handles 17, preferably formed on an outer surface of the porthole element 2, inserts the outer tongues 10 in the space between the inner tongues 16 and the inner edge 15 of the frame 3 where they are locked, for example, by the friction between the tongues 10, 16.
  • the inspection device 1 has suitable stop means for ensuring that the porthole element 2 is positioned and stopped relative to the frame 3 in a predetermined closure position.
  • the stop means are preferably resiliently deformable or resiliently movable in order to bring about resilient and/or snap stopping.
  • the outer tongues 10 of the porthole element 2 have, on the side facing towards the inner tongues 16 of the frame 3, projections 18 suitable for engaging respective grooves 19 formed in the inner tongues 16 of the frame 3.
  • the projections 18 advantageously snap-engage the grooves 19 owing to the relative pliability of the tongues 10 and 16.
  • a suitable channel 22 formed in the frame 3 is provided for housing an electrical cable for supplying the lamp 7.
  • the space for housing the illumination means 7 is delimited by a transparent wall 20 facing towards the interior of the conveyor duct and by an opaque wall 21 facing towards the exterior of the duct so as to ensure illumination of the conveying space without dazzling the person inspecting the duct through the inspection device 1.
  • the frame 3 comprises an outer half-frame 3' to be associated with the wall 4 on the outside of the duct and an inner half-frame 3" to be associated with the wall 4 on the inside of the duct.
  • the inner and outer half-frames 3" and 3' advantageously have complementary shapes and can be connected to one another by connection means, preferably threaded or snap connection means and, in the specific embodiment, by connection screws 12, to form the frame 3.
  • the frame 3, preferably composed of these two half-frames 3' and 3", has a substantially U-shaped peripheral portion 23 which can house and protect an edge 24 delimiting the access opening 6, as well as connecting the device 1 to the wall 4.
  • the peripheral portion 23 is advantageously formed by an outer flange 25 of the outer half-frame 3', an inner flange 26 of the inner half-frame 3'', and a circular wall 27 substantially perpendicular to the inner and outer flanges 26 and 25.
  • the circular wall 27 advantageously delimits, together with the transparent and opaque walls 20 and 21, a channel which extends substantially around the periphery of the inspection opening 8 and which houses the tubular lamp 7.
  • the channel and, more generally, the space for housing the illumination means 7 has an opening which enables the illumination means 7 to be replaced, preferably without complete dismantling of the inspection device 1.
  • the opening is advantageously covered by means of the outer half-frame 3' so as to permit replacement of the illumination means 7 without removal of the inner half-frame 3" from the wall 4 of the duct.
  • the inspection device is advantageously but not necessarily made of synthetic material, for example, plastics material or Plexiglas, preferably polycarbonate with a glass content.
  • the frame 3 and the porthole element 2 may also be made of different materials, for example, stainless steel for the frame and polycarbonate for the porthole element.
  • the illumination means emit a substantially azure light.
  • Azure light has in fact been found to have an unusual ability to render metal surfaces, particularly stainless-steel surfaces, highly visible and to show up impurities on the surfaces extremely well.
  • the illumination means 7 emit a suffused light, further increasing the positive effect of the azure light. This is very advantageous in environments which require a very high degree of air cleanliness, such as operating theatres and hospitals in general, semiconductor and microprocessor production plants, in the pharmaceutical field, etc.
  • the inspection device 1 permits visual inspection of the interior of a conveyor duct in optimal light conditions both when the system is idle and when the system is in operation.
  • the interior of the conveyor duct can be illuminated both when the inspection opening 8 is closed by the porthole element 2 and when it is open.
  • the releasable connection of the porthole element to the frame permits cleaning of the internal surface of the porthole element and easy replacement thereof, if necessary, thus ensuring maximum transparency of the porthole element and hence optimal visibility of the interior of the duct through the porthole element.
  • the inspection device 1 is particularly suitable for use in conveyor ducts in critical environments such as hospitals, in the semiconductor and microprocessor industries, etc. where a high degree of air cleanliness is required. In fact, the device 1 permits both access to the interior of the duct for cleaning and maintenance operations and visual checking of the results of these operations, in very favourable conditions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Claims (17)

  1. Dispositif de contrôle (1) pour conduite d'acheminement de moyens aériens, en particulier l'air, comprenant un élément à porte (2) en matériau substantiellement transparent et une structure (3) qui peut être raccordée à une paroi (4) de la conduite d'acheminement dans la zone d'une ouverture d'accès (6) présente dans la paroi (4), de manière à ce que l'élément à porte (2) soit superposé à l'ouverture d'accès (6) et que l'ouverture d'accès (6) soit fermée, caractérisé par le fait que le dit dispositif (1) comprend des moyens d'éclairage (7), orientés vers l'intérieur de la conduite d'acheminement et placés à l'intérieur d'un espace pour le logement des dits moyens d'éclairage, indiqués pour éclairer une zone d'acheminement de la même conduite, dans le but de permettre un contrôle visuel de cette dernière, aussi bien si l'installation est arrêtée que si elle est en marche, et par le fait que le dispositif de contrôle délimite à l'intérieur un espace pour le logement des moyens d'éclairage.
  2. Dispositif (1) d'après la revendication 1, caractérisé par le fait que l'élément à porte (2) est raccordé à la structure (3) de façon non fixe, permettant l'accès à l'intérieur de la conduite à travers une ouverture de contrôle (8) délimitée par la structure (3).
  3. Dispositif d'après les revendications 1 ou 2, caractérisé par le fait que l'élément à porte (2) est raccordé à la structure (3) par l'intermédiaire de moyens filetés ou à baïonnette (10, 16).
  4. Dispositif (1) d'après les revendications 2 ou 3, comprenant des moyens d'arrêt (18, 19) indiqués pour bloquer l'élément à porte (2) relatif à la structure (3) dans une position de fermeture prédéterminée.
  5. Dispositif (1) d'après la revendication 4, caractérisé par le fait que les moyens d'arrêt (18, 19) sont mobiles ou déformables du point de vue élastique dans le but de déterminer le blocage élastique et/ou à détente de l'élément à porte (2) dans la position de fermeture.
  6. Dispositif (1) d'après l'une des revendications précédentes, caractérisé par le fait que les moyens d'éclairage (7) sont associés à la structure (3).
  7. Dispositif (1) d'après l'une des revendications précédentes, caractérisé par le fait que les moyens d'éclairage (7) comprennent une lampe allongée, de préférence une lampe tubulaire fluorescente.
  8. Dispositif (1) d'après les revendications précédentes, caractérisé par le fait que la lampe tubulaire s'étend à proximité du bord de l'ouverture de contrôle (8).
  9. Dispositif (1) d'après la revendication 8, caractérisé par le fait que la structure (3) délimite, par l'intermédiaire d'une paroi transparente (20) tournée vers l'intérieur de la conduite et d'une paroi opaque (21) tournée vers l'extérieur de la conduite, un canal qui s'étend substantiellement autour du bord de l'ouverture de contrôle (8) et qui contient la lampe tubulaire.
  10. Dispositif (1) d'après l'une des revendications précédentes, caractérisé par le fait que la structure (3) présente une portion du bord substantiellement en U (23) indiquée pour le logement et à la protection d'une extrémité (24) de la paroi (4) délimitant l'ouverture d'accès (6).
  11. Dispositif (1) d'après l'une des revendications précédentes, caractérisé par le fait que la structure (3) comprend une semi-structure interne (3 ") à associer à la paroi (4) su l'intérieur de la conduite et une semi-structure externe (3') à associer à la paroi (4) sur l'extérieur de la conduite, dite semi-structure interne (3") et dite semi-structure externe (3') étant réciproquement connectable par l'intermédiaire de moyens de connexion (12), de préférence filetés ou à détente, pour constituer la structure (3).
  12. Dispositif (1) d'après la revendication 11, caractérisé par le fait que la structure (3) délimite à l'intérieur un espace pour le logement des moyens d'éclairage (7), dit espace présentant une ouverture destinée à permettre le remplacement des moyens d'éclairage (7), dite ouverture étant couverte par la semi-structure externe (3') de manière à permettre le remplacement des moyens d'éclairage (7) sans démonter la semi-structure interne (3 ") de la paroi (4) de la conduite.
  13. Dispositif (1) d'après l'une des revendications précédentes, réalisé en matériau synthétique, de préférence polycabonate avec contenu en verre.
  14. Dispositif d'après l'une des revendications précédentes, caractérisé par le fait que les moyens d'éclairage émettent une lumière substantiellement bleu ciel.
  15. Dispositif d'après l'une des revendications précédentes, caractérisé par le fait que les moyens d'éclairage émettent une lumière faible.
  16. Paroi (4) destinée à former une conduite d'acheminement de moyens aériens, en particulier l'air, comprenant une ouverture d'accès (6), caractérisée par le fait que la paroi (4) est munie d'un dispositif de contrôle d'après l'une des revendications précédentes.
  17. Conduite d'acheminement de moyens aériens, en particulier l'air, comprenant une paroi (4) munie d'une ouverture d'accès (6), caractérisée par le fait que la conduite d'acheminement comprend un dispositif de contrôle d'après l'une des revendications précédentes.
EP02760559A 2002-08-06 2002-08-06 Dispositif d'inspection destine a des conduits d'acheminement pour milieux aeriformes Expired - Lifetime EP1558878B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT02760559T ATE344427T1 (de) 2002-08-06 2002-08-06 Inspektionsgerät für eine förderleitung eines gasförmigen mediums

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2002/000523 WO2004013543A1 (fr) 2002-08-06 2002-08-06 Dispositif d'inspection destine a des conduits d'acheminement pour milieux aeriformes

Publications (2)

Publication Number Publication Date
EP1558878A1 EP1558878A1 (fr) 2005-08-03
EP1558878B1 true EP1558878B1 (fr) 2006-11-02

Family

ID=31198600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760559A Expired - Lifetime EP1558878B1 (fr) 2002-08-06 2002-08-06 Dispositif d'inspection destine a des conduits d'acheminement pour milieux aeriformes

Country Status (4)

Country Link
EP (1) EP1558878B1 (fr)
AU (1) AU2002326150A1 (fr)
DE (1) DE60215868D1 (fr)
WO (1) WO2004013543A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2468907A (en) * 2009-03-27 2010-09-29 Clive James Berry An improved access door for ductwork
DE202011109291U1 (de) 2011-12-20 2012-11-29 Gert Bartholomäus Brandschutzklappe mit Befestigungsmitteln
CH707889A1 (de) * 2013-04-15 2014-10-15 Rieter Ag Maschf Filtereinrichtung für eine Textilmaschine mit einer Filterkammer.
EP4354066A1 (fr) * 2022-10-14 2024-04-17 BDR Thermea Group B.V. Conduit de guidage d'air
US11841160B1 (en) * 2023-04-26 2023-12-12 Christopher Mickey Air handler coil access

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782411A (en) * 1972-06-30 1974-01-01 United Mcgill Corp Duct access section
US4217930A (en) * 1978-09-28 1980-08-19 Charles Dallas Venting port for shipping containers
US4572240A (en) * 1984-02-27 1986-02-25 Philips Industrial Components, Inc. Access door construction
DE19654683A1 (de) * 1996-12-31 1998-07-02 Zubler Geraetebau Vorrichtung zur Überwachung einer Strömung

Also Published As

Publication number Publication date
EP1558878A1 (fr) 2005-08-03
AU2002326150A1 (en) 2004-02-23
WO2004013543A1 (fr) 2004-02-12
DE60215868D1 (de) 2006-12-14

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