Gas pipeline settlement detection device

The utility model discloses a gas pipeline settlement detection device which comprises a detection box, a fixing ring and a sleeve connected between the detection box and the fixing ring, a detection ruler is arranged in the sleeve, one end of the detection ruler is fixedly connected with the fixing ring, and the other end of the detection ruler is arranged in the detection box; a detection unit is further arranged in the detection box, and the detection ruler is matched with the detection unit, so that the settling volume of the gas pipeline is detected through the matching of the detection ruler and the detection unit; the detection unit comprises a pointer, a sliding block and a scale seat, the top surface of the scale seat is a scale surface, a sliding channel is arranged in the scale seat, the sliding block is slidably connected in the sliding channel, a through groove communicated with the interior of the sliding channel is further formed in the scale surface of the scale seat, the pointer is fixed to t