Easy-to-use suction tube

The utility model relates to the technical field of water quality detection, in particular to an easy-to-use suction tube which comprises a liquid storage tube and a protective device, an upper tube body is arranged above the liquid storage tube, a lower tube body is arranged below the liquid storage tube, the protective device is arranged on the surface of the lower tube body and comprises a convex ring, the convex ring is arranged on one side of the lower tube body, and the convex ring is arranged on the other side of the lower tube body. According to the water quality detection suction pipe, the protection device is arranged, so that equipment can be protected conveniently, the situation that when the water quality detection suction pipe sucks a sample in a container, the pipe head is inevitably collided with the inner wall of the sample container, and the water quality detection suction pipe cannot be damaged is effectively reduced. Especially when the number of samples is too small, the phenomena that th