Drainage device for washing cooling water of multi-stage pump mechanical seal

The utility model provides a drainage device for washing cooling water of a multi-stage pump mechanical seal, which relates to the technical field of multi-stage pumps and comprises a mechanical seal, a drainage groove and a drainage side baffle, the drainage groove is arranged below the multi-stage pump, a pump shaft is arranged in the multi-stage pump, the mechanical seal is arranged at two ends of the pump shaft and at the penetrating position of the multi-stage pump, and the drainage side baffle is arranged on the drainage groove. Water retaining rings are arranged at the two ends of the pump shaft, the water retaining rings are arranged at the outer end of the mechanical seal, and a flushing cooling water inlet is formed in the upper portion of the mechanical seal; circulating cooling water is used for flushing the mechanical seal, after cooling, flushing cooling water flows out from the mechanical seal to the water retaining ring to be blocked and stopped, the cooling water falls down along the lower ed