FR2340489A1 - Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door - Google Patents

Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door

Info

Publication number
FR2340489A1
FR2340489A1 FR7603456A FR7603456A FR2340489A1 FR 2340489 A1 FR2340489 A1 FR 2340489A1 FR 7603456 A FR7603456 A FR 7603456A FR 7603456 A FR7603456 A FR 7603456A FR 2340489 A1 FR2340489 A1 FR 2340489A1
Authority
FR
France
Prior art keywords
cut out
door
diameter
access hole
cover plate
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.)
Granted
Application number
FR7603456A
Other languages
French (fr)
Other versions
FR2340489B1 (en
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.)
Areva NP SAS
Original Assignee
Framatome SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Framatome SA filed Critical Framatome SA
Priority to FR7603456A priority Critical patent/FR2340489A1/en
Priority to ZA770451A priority patent/ZA77451B/en
Priority to ES455520A priority patent/ES455520A1/en
Priority to BE174782A priority patent/BE851245A/en
Publication of FR2340489A1 publication Critical patent/FR2340489A1/en
Application granted granted Critical
Publication of FR2340489B1 publication Critical patent/FR2340489B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/22—Drums; Headers; Accessories therefor
    • F22B37/221—Covers for drums, collectors, manholes or the like
    • F22B37/222—Nozzle dams introduced through a smaller manway, e.g. foldable

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Abstract

During interior maintenance work on large vessels such as heat exchangers of nuclear reactors, the openings to supply and discharge ducts may be blocked by the use of this folding cover plate. It consists of a flat circular disc cut along a diameter into two parts (21, 22) and having a rectangular cut out in the middle, with its long edges parallel to the dividing diameter. Hinges (20) are provided at each end of the diameter, connecting the two halves together. The rectangular cut out provides an access hole which is covered by a removable door (23) fitted with longitudinal edge stiffening ribs and handles. Stiffening ribs on the cover plates are fitted parallel to the cut out edges and serve also as guides for centralising the door. A sealing membrane attached along the long edges of the cut out extends to cover the hole automatically when the plates are hinged out to seal the duct opening.
FR7603456A 1976-02-09 1976-02-09 Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door Granted FR2340489A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7603456A FR2340489A1 (en) 1976-02-09 1976-02-09 Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door
ZA770451A ZA77451B (en) 1976-02-09 1977-01-26 Device for closing off an aperture
ES455520A ES455520A1 (en) 1976-02-09 1977-02-01 Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door
BE174782A BE851245A (en) 1976-02-09 1977-02-09 ORIFICE BLOCKING DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7603456A FR2340489A1 (en) 1976-02-09 1976-02-09 Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door

Publications (2)

Publication Number Publication Date
FR2340489A1 true FR2340489A1 (en) 1977-09-02
FR2340489B1 FR2340489B1 (en) 1979-07-20

Family

ID=9168886

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7603456A Granted FR2340489A1 (en) 1976-02-09 1976-02-09 Temporary cover plate for large duct openings - has hinged plate with rectangular access hole and door

Country Status (4)

Country Link
BE (1) BE851245A (en)
ES (1) ES455520A1 (en)
FR (1) FR2340489A1 (en)
ZA (1) ZA77451B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532715A1 (en) * 1982-09-07 1984-03-09 Thome Paul Shutoff device for the primary circuit of nuclear reactors.
FR2554208A1 (en) * 1983-11-02 1985-05-03 Framatome Sa PROVISIONAL SHUTTER PANEL FOR PASSING INSIDE AN ACCESSIBLE ENCLOSURE ONLY BY A SMALLER DIMENSIONAL ORIFICE
FR2568659A1 (en) * 1984-08-03 1986-02-07 Villejuif Etudes Indles Stopper with variable geometry
FR2574975A1 (en) * 1984-12-18 1986-06-20 Thome Jean Patrick Shutting off the primary circuit of nuclear reactors from the steam generators
EP0242615A2 (en) * 1986-04-21 1987-10-28 Combustion Engineering, Inc. Improved multisectioned nozzle dam
US4743054A (en) * 1985-08-09 1988-05-10 Framatome Device for the installation and retention of a shutter plate for an opening in an enclosure
EP0488639A1 (en) * 1990-11-26 1992-06-03 Westinghouse Electric Corporation A nozzle dam and process for closing off a nozzle of a steam generator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532715A1 (en) * 1982-09-07 1984-03-09 Thome Paul Shutoff device for the primary circuit of nuclear reactors.
FR2554208A1 (en) * 1983-11-02 1985-05-03 Framatome Sa PROVISIONAL SHUTTER PANEL FOR PASSING INSIDE AN ACCESSIBLE ENCLOSURE ONLY BY A SMALLER DIMENSIONAL ORIFICE
EP0141738A1 (en) * 1983-11-02 1985-05-15 Framatome Temporary cover for an opening inside a vessel, only accessible via an opening of smaller dimensions
FR2568659A1 (en) * 1984-08-03 1986-02-07 Villejuif Etudes Indles Stopper with variable geometry
FR2574975A1 (en) * 1984-12-18 1986-06-20 Thome Jean Patrick Shutting off the primary circuit of nuclear reactors from the steam generators
US4743054A (en) * 1985-08-09 1988-05-10 Framatome Device for the installation and retention of a shutter plate for an opening in an enclosure
EP0242615A2 (en) * 1986-04-21 1987-10-28 Combustion Engineering, Inc. Improved multisectioned nozzle dam
EP0242615A3 (en) * 1986-04-21 1987-12-16 Combustion Engineering, Inc. Improved multisectioned nozzle dam
EP0488639A1 (en) * 1990-11-26 1992-06-03 Westinghouse Electric Corporation A nozzle dam and process for closing off a nozzle of a steam generator

Also Published As

Publication number Publication date
FR2340489B1 (en) 1979-07-20
BE851245A (en) 1977-08-09
ES455520A1 (en) 1978-01-16
ZA77451B (en) 1977-12-28

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Legal Events

Date Code Title Description
ST Notification of lapse