Flow measuring device, system and method

The invention relates to the technical field of flow measurement, in particular to a flow measurement device, system and method. The flow measuring device comprises a heat exchange pipe embedded into a measured pipeline and a shell arranged outside the heat exchange pipe in a sleeving mode, the shell is provided with a cavity for containing a cooling working medium, an inlet pipe and an outlet pipe are arranged at the two ends of the shell in the flowing direction of the measured working medium, and the inlet pipe and the outlet pipe are both communicated with the cavity of the shell. And the measured working medium and the cooling working medium are used for heat exchange to measure the measured working medium flow. The flow measurement device solves the problem that the flow measurement precision of the small-flow high-temperature working medium is low. 本发明涉及流量测量技术领域，尤其涉及一种流量测量装置、系统及方法。流量测量装置，包括：嵌入被测管路的热交换管和套设在所述热交换管外的壳体，所述壳体具有容纳冷却工质的腔室，沿着被测工质的流动方向，在所述壳体两端设置有进口管和出口管，所述进口管和出口管均与壳体腔室连通，利用被测工质与冷却工质进行热量交换测量被测工质