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    • 16. 发明授权
    • Bell-and-spigot concrete pipe joint with plastic liner ring
    • 水泥管接头与塑料衬套环
    • US4084828A
    • 1978-04-18
    • US708591
    • 1976-07-26
    • David P. Jones
    • David P. Jones
    • B28B21/74F16L21/035F16L21/02
    • B28B21/74F16L21/035
    • A thin-walled joint face liner ring providing a smooth and continuous face is applied to the bell or to both the bell and the spigot of concrete pipe. The outer end of the ring is formed as a reversely curved flange so that its edge enters and is buried in the concrete. Its inner end extends part way outward along the shoulder of the pipe and thence axially so that its edge also enters and is buried in the concrete. Each ring is applied by placing it on the usual joint face-forming portions of the pipe mold, casting the concrete against the ring and about its edges, and subsequently curing the concrete in place against the ring or rings. When used on the spigot face, it can be made to form the usual gasket groove at such end, and thereby permit use of a more simple mold structure.
    • 一个提供平滑连续面的薄壁接头面衬垫环施加到钟罩或混凝土管的钟罩和套管。 环的外端形成为反向弯曲的凸缘,使得其边缘进入并被埋在混凝土中。 其内端部沿着管子的肩部向外延伸,从而沿轴向延伸,使其边缘也进入并埋设在混凝土中。 每个环通过将其放置在管模的通常的接合面形成部分上来施加,将混凝土压在环上并围绕其边缘,随后将混凝土固定在环或环上。 当在插口面上使用时,可以在其端部形成通常的垫圈槽,从而允许使用更简单的模具结构。