Device for optimizing nuclear power circulating pump mechanical seal shaft seal water supply

The invention belongs to the technical field of nuclear power station circulating pumps, and particularly relates to a device for optimizing nuclear power circulating pump mechanical seal shaft seal water supply. Comprising a first isolating valve which is connected with two groups of pipelines connected in parallel. One of the two groups of pipelines connected in parallel comprises a second isolating valve, a first Y-type filter and a first blow-down valve, the first isolating valve is connected with the second isolating valve, the second isolating valve is connected with the first Y-type filter, the first Y-type filter is connected with the first blow-down valve, and the first blow-down valve is connected with a drainage ditch through a pipeline. The device has the beneficial effects that a set of filtering and protecting system is additionally arranged on each of the normal SEP water supply pipeline and the SEA standby water source water supply pipeline of the circulating pump, so that the problems that th