| 摘要 |
A pipe section for concrete includes an end coupler interconnecting to another pipe section in a flow line. The coupler has an outer clamp secured extended from the pipe end with a coupling groove. An encircling clamp has sides located in the grooves of adjacent pipe sections to lock the pipe section together. The body and pipe end form an inner recess extending from the pipe end. An insert liner has a tubular portion matching the recess, with the outer surface of the tubular portion tapered to form a gap within the recess. The insert liner has an outer flange matching the outer diameter of the body and abuts the body. The inner wall of the liner has a central transition point from which the wall tapers inwardly in opposite directions to the outer end. The body member is formed of a high strength ductile steel. The insert liner is formed of a wear resistant material having a Rockwell hardness of 80 to 90. A carbide alloy consisting essentially of carbides, martensite, bainite and austenite, and 12-15% chromium, 2-3% carbon and traces nickel, molybdenum and austenite. A toughened ceramic is disclosed. The liner is adhesively bonded to the body using an epoxy adhesive which is responsive to heat for release of the liner. The liner is inserted by applying adhesive on the tubular portion and then pushing the liner into the recess.
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