초록 ▼

A collar clamp assembly is disclosed for repairing and providing a temporary seal around leaking pipe coupling areas of an internal core spray system of a nuclear reactor. The clamp assembly includes first and second housings having respective first and second ends and a pair of longitudinal edges b

A collar clamp assembly is disclosed for repairing and providing a temporary seal around leaking pipe coupling areas of an internal core spray system of a nuclear reactor. The clamp assembly includes first and second housings having respective first and second ends and a pair of longitudinal edges between the ends. The housings have a tongue and groove mating configuration along the longitudinal edges to seal and accommodate variations in the outside diameter of the core spray piping. A plurality of threaded fasteners are used to secure the first and second housings together to form a closed conduit shaped to receive a length of the core spray piping, including the leaking pipe coupling. First and second seals are located at first and second longitudinally spaced positions, respectively, on each of the first and second housings and extend around the closed conduit. The seals are oriented to seal the housings against the outer circumferential surfaces of the core spray piping on either side of the leaking pipe coupling. A grip structure configured to engage and grip an outer circumferential surface of the core spray piping is provided to prevent the pipe coupling from pulling apart in a longitudinal direction. Variations in the seals, the grip structure, and the housings are disclosed.

대표청구항 ▼

[ What is claimed is:] [1.]1. A pipe repair apparatus, comprising:first and second housings, each housing comprising respective first and second ends and a pair of longitudinal edges between said ends, said housings being configured to mate along said longitudinal edges;a plurality of fasteners secu

[ What is claimed is:] [1.]1. A pipe repair apparatus, comprising:first and second housings, each housing comprising respective first and second ends and a pair of longitudinal edges between said ends, said housings being configured to mate along said longitudinal edges;a plurality of fasteners securing the first and second housings together to form a closed conduit between the ends, said conduit being shaped to receive a pipe to be repaired;a first seal located at a first position on each of said first and second housings and extending around said closed conduit, said first seal being oriented to seal the housings against an outer circumferential surface of the pipe to be repaired;a second seal located at a second position on each of said first and second housings which is spaced longitudinally from said first position, said second seal extending around said closed conduit and being oriented to seal the housings against an outer circumferential surface of the pipe to be repaired; anda grip means for restraining a pipe to be repaired from pulling apart in a longitudinal direction;wherein said grip means comprises a first gripping ring positioned adjacent to said first seal, and a second gripping ring positioned adjacent to said second seal, said gripping rings each having teeth configured to engage and grip an outer circumferential surface of the pipe to be repaired, said gripping rings being arranged such that the teeth bite harder into the surface of the pipe if the pipe begins to pull apart.