我公司一台浦源工程机械厂生产的汽车起重机，在使用３年后组合分配阀（控制上车动作的阀块）溢流阀块内Ｏ形圈经常损坏漏油，更换新件后仅用几天便再次漏油，经过对该溢流阀结构的简单改进，根除了这一故障，并使其控制的上车主油道压力实现了可调。其他同样的用户在修理该阀 Our company a Puyuan Construction Machinery Factory car cranes, the use of three years after the combination of distribution valve (control valve on the train action) O-ring overflow valve often damaged oil leakage, the replacement of new pieces only After a few days, the oil leaked again. After a simple improvement on the structure of the relief valve, the fault was eliminated and the pressure on the owner’s oil passage controlled by it was adjusted. Other same users are repairing the valve