Exhaust and pressurizing integrated device for water hammer pressure release valve and water hammer pressure release valve system

The invention provides an exhausting and pressurizing integrated device for a water hammer pressure release valve and a water hammer pressure release valve system.The exhausting and pressurizing integrated device comprises a cylinder body, a pipeline assembly, a through-flow connector assembly and a pipeline switching assembly, and a flow path switching cavity, a first flow path and a second flow path are formed in the cylinder body, an exhaust pipeline of the pipeline assembly is used for communicating an upper connecting pressure relief pipeline of the water hammer pressure relief valve with the first flow channel, a pressurizing pipeline is used for communicating a valve cavity of the water hammer pressure relief valve with the second flow channel, and the through-flow connector assembly is arranged on the cylinder body corresponding to the peripheral side of the flow path switching cavity and used for controlling connection and disconnection between the flow path switching cavity and the outside. The thro