초록 ▼

Polyolefin pipes are welded end-to-end by a self-propelled, self-contained machine which performs all steps necessary to the process without need for any other machines or equipment. Hydraulically driven parallel tracks are independently controlled for maximum maneuverability. An hydraulically drive

Polyolefin pipes are welded end-to-end by a self-propelled, self-contained machine which performs all steps necessary to the process without need for any other machines or equipment. Hydraulically driven parallel tracks are independently controlled for maximum maneuverability. An hydraulically driven, computer controlled, reversible jaw assembly reciprocates the new pipe section relative to the exiting pipe line. A facer for trimming and squaring the pipe ends to be joined and a heater for melting the pipe ends for fusing are umbilically connected to the machine for on-board or remote operation. The computer, also on an umbilical, enables the operator to operate the machine in a normal mode in which the operator manually controls the facing, soaking and fusing processes or an automatic mode in which the fusing process is automatically controlled by the computer. The computer also allows the operator to choose a data logging mode in which the operating pressure, heater temperature and time data are recorded to provide a history for each joint made by the machine.

대표청구항 ▼

[ What is claimed is:] [1.]1. For connecting a pipe facer to a machine for end-to-end welding polyolefin pipes, a linkage comprising:a bracket fastenable to the machine;a pivot shaft fastened at ends thereof to said bracket, a pivot shaft sleeve concentric with and slidable along and rotatable about

[ What is claimed is:] [1.]1. For connecting a pipe facer to a machine for end-to-end welding polyolefin pipes, a linkage comprising:a bracket fastenable to the machine;a pivot shaft fastened at ends thereof to said bracket, a pivot shaft sleeve concentric with and slidable along and rotatable about said shaft;a drag link sleeve;a drag link connecting said drag link sleeve radially to said pivot shaft sleeve with said drag link sleeve parallel to said pivot shaft sleeve;a pivot link;a drag link pivot pin extending through one end of said pivot link into said drag link sleeve to permit radial rotation of said pivot link in relation to said drag link sleeve; anda facer pivot pin extending through another end of said pivot link into the facer to permit radial rotation of the facer in relation to said pivot link.