초록 ▼

This invention relates to a lug for anchoring the end of a tie rod at a bell flange and spigot pipe joint and for sealing more effectively the bell flange and spigot joint. One portion of the lug is positioned on a bolt which connects the bell flange and a gland and is inserted between said bell fla

This invention relates to a lug for anchoring the end of a tie rod at a bell flange and spigot pipe joint and for sealing more effectively the bell flange and spigot joint. One portion of the lug is positioned on a bolt which connects the bell flange and a gland and is inserted between said bell flange and said gland. The other end of the lug is formed to hold securely the end of a tie rod. The tie lug is designed in such a manner that when the tie rod is tightly anchored to the lug, pressure is thereby exerted on the gasket between the bell flange and the gland with the result that a more effective seal is achieved.

대표청구항 ▼

A pipe joint comprising, two pipe sections, each having fluid transmitting passages, each section having a bell-shaped end, said bell-shaped ends being coaxially aligned and facing toward each other, one said section including a means for changing the direction of flow of at least a part of a fluid

A pipe joint comprising, two pipe sections, each having fluid transmitting passages, each section having a bell-shaped end, said bell-shaped ends being coaxially aligned and facing toward each other, one said section including a means for changing the direction of flow of at least a part of a fluid flowing in the passages, a straight section of pipe with its ends extending into the two bell-shaped ends, each bell-shaped end including a radially extending flange, means forming a cavity in each flange, two gaskets, one circumscribing each end of the straight section and being in sealing engagement with the periphery of the straight section and the cavity in the adjacent bell end, two glands, each circumscribing the straight section, each gland being spaced from one adjacent bell end and including an annularly extending abutment configured to press the adjacent gasket into sealing contact with the cavity in the adjacent bell, the space between each adjacent bell and gland comprising a gap, each gland and each flange including a plurality of aligned holes, bolts extending through said holes, nuts threaded on said bolts and engaging said gland, a plurality of lugs mounted in each gap, each said lug having: (a) a pair of shoulders, each with a planer surface engaging the periphery of the adjacent gland, the height of the shoulders adjacent the gland being about 1.8 cm, (b) a body with parallel flat surfaces, one flat surface facing the flange and the other flat surface facing the gland, the surface of the lug nearest the straight section of pipe being curved to accommodate the periphery of the abutment of said gland, said body having a thickness of about 1.27 cm., (c) the following physical properties: (1) a tensile strength over about 65,000 psi, (2) a yield strength over about 45,000 psi, (3) an elongation at yield of not less than about 12%, (4) a Brinell Hardness in the range 170-206 HB, (5) a microstructure of ferritic-pearlite with a nodularity in excess of 90% with no free carbides in the area inward of the shoulders nor in the shoulders adjacent the gland, (d) a percentage composition by weight in the range: Carbon: 3.5-3.8 Manganese: 0.20-0.30 Sulfur: 0.01-0.02 Silicon: 2.5-2.65 Phosphorus: 0.01-0.025 Magnesium: 0.04-0.06 Iron: balance (e) a hole aligned with a pair of aligned holes in the gland and flange and having a bolt extending therethrough, a plurality of threaded rods, each rod extending through an opening in a lug in each gap, nuts threadedly engaging each end of each rod and abutting the adjacent lug to place the rod in tension.