摘要:
A fusion welding socket (18) for coupling together plastic pipes, is adapted to receive the pipe parts to be coupled together with a tight fit. The diameter of the ends (19) of the socket is greater than the diameter of the socket along an intermediate part (20) and the diameter at the ends is adapted to receive with a tight fit an outer pipe (1) and the diameter of the intermediate part is adapted to receive with a tight fit an inner pipe (2) of a double-pipe conduit which includes two coaxial pipes and a leakage detection space (3) therebetween. The socket includes coils (24-27) having resistance wires or filaments which enable the socket material to be fused locally together with the material in both the outer pipes and the inner pipes of two double-pipe conduits that are to be coupled together with the aid of the socket. The socket also includes at least one passageway (21) which interconnects the spaces in the socket on both sides of the intermediate socket part.
摘要:
A welded joint for a thermoplastic double containment pipes is formed by an apparatus including an electrofusion welding sleeve placed over the primary pipe, an electrofusion welding sleeve placed over the secondary pipe, clamps which concentrate their clamping pressure at preselected areas on the secondary pipe sleeve and anchor plates located on one or both opposite sides of the joint.
摘要:
A pipe manipulation apparatus having a base frame and a sliding end slidable towards and away from the base frame, each of the base frame and sliding end having at least one pipe support coupled with a press clamp pivotable between an open position and a closed position, wherein in the open position, a pipe is placeable on to the at least one pipe support and, in the closed position, the inner surfaces of the press clamp and the pipe support define a bore in which a lengthwise portion of the pipe is receivable. The pipe manipulation apparatus may be portable, tiltable, and/or rotatable to accommodate pipes of various locations and angles.
摘要:
A fusion welding socket for coupling together double walled plastic conduits including an inner pipe, an outer pipe surrounding the inner pipe and an annular space arranged between the inner and outer pipes. The fusion welding socket includes a main body comprising a first end portion, a second end portion and an intermediate portion. The intermediate portion has at least one inner diameter which is smaller than the inner diameters of the first and second end portions. Three heating coils are embedded in the first end portion, the second end portion and the intermediate portion, respectively, for fusing together the first and second end portions with a respective outer pipe of a first and second conduit and the intermediate portion with a respective inner pipe of the first and second conduit. A passageway includes an annular space is arranged to connect the annular spaces of the first and second conduit after fusion.
摘要:
An improved welding rod having a solid homogeneous core of thermoplastic material and a resistance element comprised of a plurality of wires is presented with a method and apparatus for forming the welding rod. The welding rod is positioned between members of the thermoplastic material to be welded and a current and pressure is applied to the resistance element causing the thermoplastic material of the solid core and the adjacent thermoplastic members to fuse and form a unitary weld. Simultaneously the electrical resistance element is embedded in the weld, mechanically reinforcing and strengthening the connection. There is also disclosed a method for electric fusion welding of thermoplastic members wherein the welding rod is pre-attached to one of the thermoplastic members.
摘要:
An induction connecting sleeve for connecting weldable thermoplastic elements by means of fusion, with at least two sockets for the insertion of connection sections of the thermoplastic elements to be connected, and with an induction heating element embedded in the sockets, with operative sections of the induction heating element surrounded completely by a weldable thermoplastic material, and with the induction heating element arranged coaxially to the sockets. The induction heating element may be manufactured of metallic material with spring characteristics and to embed it under pre-tension in the thermoplastic material of the sockets. When the induction heating element is heated and the thermoplastic material of the socket of the induction connecting sleeve is plasticized, the induction heating element relaxes which causes radial pressure to build towards the connection section.
摘要:
A double containment pipe fitting and method of making same is disclosed. The fitting includes a branch double containment pipe section butt welded to a double containment pipe header, or main section to form a fitting wherein the branch section extends away from the header section. The header and branch section primary and secondary pipe portions contain distinct engagement surfaces which are joined together to form the fitting. A unique, non-planar heating element having opposed heating surfaces is brought into contact with the main and branch pipe sections to soften the plastic for welding purposes which are then joined together in a manner such that the respective centerlines of each pipe section intersect.
摘要:
For welding composite pipes together a welding ring is used, which bears against the side wall portions of elevations. It consists of thermoplastic material and is provided with an electric resistance heating. Prior to welding there is an annular gap between the front walls of the pipes to which annular gap a volume compensating groove is associated in the welding ring. A connection of the pipes in their region outside of their inner pipe is performed by an at least partial welding of the welding ring, the front walls bearing against each other in unwelded manner.
摘要:
Provided is a packing means for sealing including a base ring member; an upper ring member; and a lower ring member, wherein the base ring member has a projection line at the inner surface thereof so as to be not slide on an outer surface of the pipe but fixed thereon when the base ring member is closely contacted with the upper and lower ring member at the same time when being rotated by external force, and also has a rib line which is formed to traverse the projection line so that a depth that the projection line is struck into the outer surface of the pipe is restricted, and the projection line is formed into a spiral or oblique-toothed structure so as to be struck in a desired depth into the outer surface of the pipe toward the lower ring member corresponding to the upper ring member.
摘要:
A double containment pipe fitting and method of making same is disclosed. The fitting includes a branch double containment pipe section butt welded to a double containment pipe header, or main section to form a fitting wherein the branch section extends away from the header section. The header and branch section primary and secondary pipe portions contain distinct engagement surfaces which are joined together to form the fitting. A unique, non-planar heating element having opposed heating surfaces is brought into contact with the main and branch pipe sections to soften the plastic for welding purposes which are then joined together in a manner such that the respective centerlines of each pipe section intersect.