Carrier gas flow rate regulation and control device for gas chromatograph

The utility model discloses a carrier gas flow velocity regulating and controlling device for a gas chromatograph. The carrier gas flow velocity regulating and controlling device comprises a precise pressure reducing valve and a gas resistance pipe, the precise pressure reducing valve is mounted at a gas inlet of a carrier gas system of the gas chromatograph; the gas resistance pipe is a hollow pipe and is connected between the precise pressure reducing valve and a gas inlet of a vaporizing chamber of the gas chromatograph; and the carrier gas flow speed regulating device is used for regulating the pressure of the carrier gas entering the gas resistance pipe through a precise pressure reducing valve. Compared with a traditional flow regulating valve, the carrier gas flow speed regulating device is simple and compact in structure, higher in reliability and beneficial to lightweight and portable design of the gas chromatograph. 本实用新型公开了一种用于气相色谱仪的载气流速调控装置，该载气流速调控装置包括精密减压阀和气阻管；精密减压阀安装于气相色谱仪的载气系统进气口；气阻管为一段中空管，连接于精