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    Screwed safety assembly of two components and devices for producing and implementing such an assembly
    2.
    发明专利
    Screwed safety assembly of two components and devices for producing and implementing such an assembly 未知

    公开(公告)号：FR2676514A1

    公开(公告)日：1992-11-20

    申请号：FR9105750

    申请日：1991-05-13

    Applicant: FRAMATOME SA

    Inventor： OLIVIER LE DANTEC ,  FRANCOIS VIALLARD

    IPC: B23H9/14 ,  F16B39/02 ,  G21C5/10

    Abstract: The screwed assembly includes a screw having a head engaged in a smooth housing (60) in a first component, and a threaded shank engaged in a tapped part of a second component. The screw head includes a deformable cylindrical hoop and the smooth housing (60) for the screw head exhibits means for immobilizing the screw, these means being machined into its internal wall over a part of its periphery. The means for immobilising the screw head include at least one set made up of two flared parts (65) and a circular groove (66) located between the flared parts (65) and produced by machining by spark erosion in a single operation with the aid of an electrode (67). The expansion of the hoop into the flared parts (65) is brought about by the tool for screwing the screw, in a single operation, by means of an elastomeric material put under pressure.

    Device for supporting and positioning a means of intervention in a specific region of the baffle assembly of the core of a pressurised water nuclear reactor
    4.
    发明专利
    Device for supporting and positioning a means of intervention in a specific region of the baffle assembly of the core of a pressurised water nuclear reactor 未知

    公开(公告)号：FR2656458A1

    公开(公告)日：1991-06-28

    申请号：FR8917143

    申请日：1989-12-22

    Applicant: FRAMATOME SA

    Inventor： FRANCOIS VIALLARD ,  ANDRE GUGLIELMO

    IPC: G21C19/02 ,  G21C19/19

    Abstract: The device comprises an elongate member or mast (21) provided with members for supporting and fastening (22) onto the upper part of the vertical plates (14) of the baffle assembly (13) and a means for attaching (23) the mast (21) to a lifting device at one of the ends of the mast (21) as well as a lower support (24). The lower support (24) carries at least two guide pins (25) intended to engage in two openings (16) of the lower core plate (12) and a plate (44) comprising means for resting on two successive plates (14) of the baffle assembly (13) which are arranged according to a reentrant right angle. The mast also comprises an assembly for fastening and laying flat against the inner wall of the baffle assembly in an angle formed by the two successive bearing plates (14). This assembly comprises a pin mounted movably on the lower support (24) in a transverse direction which engages in an opening (16) of the lower core plate (12) and a mechanism for actuating the movable pin to move it in a transverse direction, so as to bring it to bear on an edge of the opening (16) and, by reaction, to lay the bearing parts of the mast (21) flat between the plates of the baffle assembly (14). The mast (21) is held by being laid flat against the baffle assembly (13) without resting on the lower core plate (12) via its lower part.

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