▎ 摘　　要

NOVELTY - The meter has a graphene heating module (5) fixed on a heating bracket (4). Multiple temperature sensors are respectively installed on the heating bracket, a circuit cabin (10) and a second cable joint (12). A first rotating joint (1), a first cable joint (2) and a first heat insulating block are sequentially connected with each other and placed in a protective shell (8). A second rotating joint (13) is connected with a second heat insulation block (3,7). The second cable joints are connected with the second rotating joints. The graphene heating modules are fixed in the circuit cabin. The temperature sensor is provided with a temperature sensor and a heat dissipation sensor. USE - Downhole graphene heat conduction temperature difference method flow meter for use in an underground fluid flow measuring technology field for measuring flow rate of underground liquid. ADVANTAGE - The underground graphene heat conduction temperature difference method flow meter is simple in structure, capable of keeping the central channel smooth, convenient for using other instruments and has high measuring precision. The function of the heat insulation block is isolating the heat of the heating portion to conduct through the metal pipe wall, avoiding increasing the temperature measurement error at the temperature sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of an underground graphene heat conduction temperature difference method flow meter. 1First rotating joint 2First cable joint 3,7Heat insulation block 4Heating bracket 5Graphene heating module 6,9,11Temperature sensor 8Protective shell 10Circuit cabin 12Second cable joint 13Second rotating joint