2次液压扳手是由本体、电动液压泵、双联高压油管、高强度套筒组成。液压泵启动后通过马达产生压力，将内部的液压油通过油管介质传送到液压扳手，然后推动液压扳手的活塞杆，由活塞杆带动扳手前部的棘轮使棘轮能带动驱动轴来完成螺栓的预紧拆松工作。
Hydraulic wrench is the abbreviation of hydraulic torque wrench. High torque is used to provide power.
Secondary hydraulic wrench is generally composed of hydraulic wrench body, special pump station for hydraulic wrench, double high-pressure hose and high-strength heavy sleeve.
The special pump for hydraulic wrench can be driven by electric or pneumatic.
The secondary hydraulic wrench is composed of body, electro-hydraulic pump, double high-pressure oil pipe and high-strength sleeve. After the hydraulic pump is started, the pressure is generated by the motor to transmit the internal hydraulic oil to the hydraulic wrench through the oil pipe medium, and then push the piston rod of the hydraulic wrench. The piston rod drives the ratchet in front of the wrench, so that the ratchet can drive the drive shaft to complete the pre tightening and loosening of the bolts.
