1、升降货梯http://m.iyunsun.com/作业时液压缸随升降台运动，高压胶管反复进行挠曲动作，因而产生疲劳破断；升降货梯的负载变化较大，液压系统内将产生液压脉动，脉动压力达到一定值时，高压胶管会产生破断。
When operating the hydraulic cylinder with cargo lifter lifts sports, high pressure hose repeated flexing action, resulting in fatigue breaking; changes in the freight elevator lift a heavy load will generate hydraulic pressure pulsations within the hydraulic system, pulsating pressure reaches a certain value, high pressure hose will produce breaking.

2、升降货梯高压胶管由于质量差，胶管与金属接头的扣压连接强度不够，液压系统中峰值压力出现时，出现拔管现象。
Cargo lifter due to the poor quality of the high-pressure hose, metal hose fittings withhold connection strength is not enough, when the peak pressure in the hydraulic system occurs, there extubation phenomenon.

3、因此升降货梯http://m.iyunsun.com/采用液压双管路防爆安全阀，该液压安全阀的工作油管采用液压双管路，当一根液压油管破断后，液压安全阀的一个阀芯立即将该管路关闭，使空中作业机构安全保持在原位，同时液压安全阀的另一个阀芯工作，立即将另一条液压油管自动接通，机构仍维持正常工作，确保机器和人身安全。
Therefore, cargo lifter hydraulic dual pipeline explosion relief valves, the hydraulic valve working hydraulic tubing double lines, when a hydraulic hose broke off, a hydraulic spool valve immediately closed the pipeline, so that air operations security agencies remain in place, while the other hydraulic valve spool work immediately will automatically connect another hydraulic tubing, agencies still maintain normal work, ensure that the machine and personal safety.