Cleaning and vacuumizing device for sampling canisters

The utility model particularly relates to a cleaning and vacuumizing device for sampling canisters, wherein the cleaning and vacuumizing device is used for cleaning and vacuumizing the sampling canisters. The cleaning and vacuumizing device comprises a main parent pipe, a first-stage vacuumizing pipeline parent pipe and a second-stage vacuumizing pipeline, the first-stage vacuumizing pipeline parent pipe is communicated with the main parent pipe through a first needle valve, the second-stage vacuumizing pipeline is communicated with the main parent pipe through a second needle valve, and multiple pipelines provided with needle valves are communicated with the main parent pipe and used for being communicated with the sampling canisters. The first-stage vacuumizing pipeline parent pipe is connected with a port of a first three-way valve and a port of a second three-way valve through pipelines, and the other two ports of the first three-way valve are communicated with high-pressure nitrogen and a first-stage vacuum pump respectively, and the other two ports of the second three-way valve are communicated with a vacuum gauge and a sampling bag respectively. The second-stage vacuumizing pipeline is connected to a vacuum gauge pipe through a liquid nitrogen canister, the vacuum gauge pipe is connected to a second-stage vacuum pipe through a pipeline, and a pressure displaying window is arranged on the vacuum gauge pipe. The device is low in manufacturing cost, easy to maintain in the latter period and low in cost.