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为了使采用柱形顶头（与中空活塞杆相连）的拔管工艺过程稳定和自动调节向顶头与管子间的环缝隙供给足够的润滑油，德国推出一种拔管润滑油自动供给装置。该装置的结构特点是，在活塞杆上设计一孔，通过该孔，在压力作用下将活塞杆中的润滑油输送到拔管顶头。此外，在靠近顶头?
In order to stabilize and automatically adjust the extubation process using the cylindrical head (connected to the hollow piston rod), Germany supplies a fully automated extubation lubricant supply to supply sufficient lubricant to the ring gap between the head and the pipe. The structural feature of the device is that a hole in the piston rod is designed through which the lubricant in the piston rod is delivered under pressure to the extubation head. In addition, near the head?