Buoy liquid level meter of tar tank

The utility model belongs to the technical field of liquid level meters, and particularly discloses a tar tank buoy liquid level meter which comprises a sliding groove and a flange used for being fixedly connected with a tar tank, the sliding groove and the flange are both fixedly connected with vertical guide pipes, each vertical guide pipe is fixedly connected with two connecting plates, a guide pulley is fixedly connected between the two connecting plates through bolts, and the guide pulley is fixedly connected with the flange through bolts. The two guide pulleys are connected with a steel wire rope, the steel wire rope penetrates through the two vertical guide pipes, the two ends of the steel wire rope are fixedly connected with a heavy hammer and a floating ball respectively, outward turning baffles are arranged on the two sides of the sliding groove, and scale marks are arranged on the outward turning baffles. During use, a worker connects the device with the tar tank, the floating ball is located at th