摘要:
A concave bearing surface for use with lugs of pipe coupling segments is disclosed. The concave bearing surface is positioned on the lug and surrounds an aperture which receives a fastener attaching the coupling segments together end to end surrounding pipe ends to be joined. Either the nut or the head of the fastener that engages the concave surface may be rotated to tighten the fastener. Engagement between the concave surface and the rotating member reduces the torque required to tighten the fastener and effect a stiff, fluid tight joint. A method of securing pipe ends using coupling segments with concave bearing surfaces is also disclosed.
摘要:
A pipe coupling 10 for straddling and securing together facing ends 16a,18a of a pair of pipes 16,18 of substantially cylindrical profile. The coupling has a plurality of segments 12,14 each having a pair of axially-spaced arcuate surfaces 32,34 adapted to interface with the outer surfaces of the pipes, and connection members 24,26 for adjustably drawing together the ends of the segments 12,14. Spacers 230 are positioned between the conjoined ends of the segments to maintain them in a sufficiently spaced apart relation to allow the pipe ends 16a,18a to be inserted therebetween. The spacers 230 collapse on subsequent tightening of the connection members 24,26, to permit the arcuate surfaces 32,34 to engage the outer surfaces 20,22 of the pipes 16,18 inserted between the segments 12,14.
摘要:
A pipe coupling 10 for straddling and securing together facing ends 16a,18a of a pair of pipes 16,18 of substantially cylindrical profile. The coupling has a plurality of segments 12,14 each having a pair of axially-spaced arcuate surfaces 32,34 adapted to interface with the outer surfaces of the pipes, and connection members 24,26 for adjustably drawing together the ends of the segments 12,14. Spacers 230 are positioned between the conjoined ends of the segments to maintain them in a sufficiently spaced apart relation to allow the pipe ends 16a,18a to be inserted therebetween. The spacers 230 collapse on subsequent tightening of the connection members 24,26, to permit the arcuate surfaces 32,34 to engage the outer surfaces 20,22 of the pipes 16,18 inserted between the segments 12,14.
摘要:
A stop assembly for limiting motion of a shank of a fastener through an opening in a body is disclosed. The stop assembly has a retention element that is positionable on the shank. The retention element has a first surface that engages the shank for holding it at a predetermined position on the shank. A second surface on the retention element engages the body, and limits the motion of the shank relative to the body. Application of sufficient force to the body or removal of the retention element from the shank will allow the body and the fastener to move relatively to one another.
摘要:
A coupling for joining pipe elements in end to end relation is disclosed. The coupling includes interconnectable coupling segments having connection members at opposite ends. The connection members are tightenable for drawing the segments toward one another and into engagement with the pipe elements. Each segment has a concavity positioned between inwardly projecting arcuate surfaces that engage grooves in the pipe elements. The concavities house a sealing member that extends circumferentially around the pipe elements. Angularly oriented surfaces are positioned adjacent to the connection members. The surfaces on facing segments engage one another and cause the segments to rotate in opposite directions about an axis perpendicular to the pipe elements. The concavities are angularly oriented with respect to the axis so that when the segments rotate, the cavities receive the sealing member without distorting it. A method of joining pipe elements end to end is also disclosed.
摘要:
The invention relates to a transport tube for thick materials, in particular for concrete. The transport tube comprises substantially a pressure tube (16) from wear-resistant tube material, which is preferably hardened on the inside, and at least one coupling ring (18', 18'') which is fixed with a material-to-material fit at the end to the outer face of the pressure tube (16). According to the invention, the coupling ring (18', 18'') has a first ring part (34) having an inner face of excess dimensions with respect to the outer face of the pressure tube (16), and a second ring part (36) which adjoins the first ring part (34) axially and has an inner cone which deviates in its axial profile from the outer face of the pressure tube (16) as far as an undersize. The coupling ring (18', 18'') is pressed onto the outer face of the pressure tube (16) with the inner cone (38) of its second ring part (36). Furthermore, it delimits an annular gap space (40) with its first ring part (34) together with the pressure tube (16), which annular gap space (40) is filled at least partially with an adhesive to produce the material-to-material connection.
摘要:
Pipeline coupling (6) for connecting individual pipeline sections (51, 52), and pipeline system, wherein individual pipeline sections (51, 52) are clamped together at their end faces by pipe-clamp-like split couplings, and a sealing ring (10) is arranged inside the split coupling part (8), said sealing ring (10) having at least one pressure chamber (12) and at least two spaced-apart sealing surfaces (1 1) which, under the delivery pressure of the medium to be delivered, bear in a sealing manner against the outer circumference of the respective pipeline sections (51, 52), and wherein the sealing ring (10) furthermore has an encircling distance web (13) which points radially inwards and extends between the end faces of the clamped pipeline sections (51, 52), wherein at least one connecting passage which is permanently effective under delivery pressure is provided in the pipeline coupling (6) between the interior of the pipeline system and the pressure chamber (12) in the sealing ring (10), preferably by apertures (15) in the distance web (13).