Liquid sampling, metering and detecting device

The utility model discloses a liquid sampling, metering and detecting device, and relates to the technical field of metering and detecting devices. The device comprises a supporting bottom plate, a metering cup is clamped on the upper surface of the supporting bottom plate, guide cylinders are fixedly connected to the upper surface of the supporting bottom plate, the two guide cylinders are arranged in bilateral symmetry about the metering cup, lifting cylinders are slidably connected to the inner walls of the two guide cylinders, rotating plates are rotatably connected to the opposite faces of the two lifting cylinders, and sampling cylinders are clamped to the rotating plates. A push-pull rod is slidably connected to the upper end of the sampling barrel, the lower end of the push-pull rod is located in the sampling barrel, a mounting plate is fixedly connected to the lower surface of the push-pull rod, a rubber pad is fixedly mounted on the lower surface of the mounting plate, and the peripheral side face o