| 摘要 |
A line-up clamp unit (20) is powered by a diesel engine (22) which drives a hydraulic pump (80) for operating hydraulic equipment in the unit. The unit includes a line-up clamp (48) which has front shoes (52), rear shoes (50) and expanding copper back-up tiles (54). Drive wheels (38) are deployed by a hydraulic cylinder and operated by a hydraulic drive motor. Brakes are also operated hydraulically. A group (68) of aligning assemblies are electrically operated and function to extend L-shaped members (68a,74a) to beyond the diameter of the pipe (210) being welded so that the unit (20) can be retracted and automatically positioned at the end of a pipe section (210). A control box (76) is mounted to the line-up unit (20) and includes a radio receiver for receiving control signals and producing corresponding electric control commands for operating the hydraulic and electric components of the line-up unit. A remote control radio transmitter (122) has operating mechanisms, including push buttons and toggle switches, for operating the multiple operative elements of the line-up unit, including the engine, drive motor, brakes, line-up clamp and aligners. <IMAGE>
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