Boiler buckstay system

In a buckstay system for a membraned-tube wall of a steam generator having a first wall section which meets a second wall section to form a corner, at least one buckstay extending across at least part of each wall section, a pair of tie bars welded to each other at the corner, and an end connection corner tie welded at the corner to the pair of tie bars, an arrangement of intercooperating end connection buckstay brackets, end connection links and pins for transmitting forces from one buckstay through the links to the other buckstay and engagement means for transmitting bending forces which tend to bend each wall section to each respective buckstay which resists such bending forces, and for transmitting the weight of each buckstay to a respective wall section supporting each buckstay, the arrangement further comprising:

• at least one anchor assembly for each buckstay having upper and lower support plates welded to the outside surface of the tubes, engaged with each buckstay by the engagement means and including two pads welded to and spaced from each other on top of each support plate, a U-shaped plate welded on top of each pad to form an aperture, a first extended standoff located nearest the corner having an inner edge welded directly to one tie bar and having its upper and lower ends received within the apertures formed by one U-shaped plate on each upper and lower support plate, a second extended standoff welded to a bumper plate which is also welded to the tie bar and moves in the space between the pads, and a third extended standoff having its upper and lower ends received within the apertures formed by the other U-shaped plates on the upper and lower support plates, and engaged by the engagement means to its associated buckstay.

An anchor assembly for interconnecting a membrane-tube wall of a steam generator having a first wall section which meets a second wall section to form a corner, with a tie bar and a buckstay extending across at least part of said first wall to transmit bending forces which tend to bend said first wall to said buckstay which resists such bending forces, comprising:

• upper and lower support plates adapted to be welded to said membrane-tube wall;
• two pads welded to and spaced from each other on top of each upper and lower support plates;
• a U-shaped plate welded on top of each pad to form an aperture;
• a first extended standoff located nearest the corner having an inner edge adapted to be welded directly to one of said tie bars and having its upper and lower ends received within the apertures formed by the U-shaped plates on each upper and lower support plate;
• a second extended standoff welded to a bumper plate which is adapted to be welded to said tie bar and which moves in the space between the pads;
• and
• a third extended standoff having its upper and lower ends received within the apertures formed by the other U-shaped plates on the upper and lower support plates, all of said extended standoffs being provided with engagement means for slidably engaging the anchor assembly with the buckstay.