The utility model belongs to the technical field of farmland
irrigation, and particularly relates to an intelligent farmland
irrigation spray head capable of automatically adjusting water quantity, which comprises a base, a connecting
pipe is mounted at the top of the base, a spray head is connected to the top of the connecting
pipe, a controller is mounted at the top of the base, and a
soil humidity sensor is arranged on the outer wall of the connecting
pipe. The wiring end of the
soil humidity sensor is connected with a detection probe, and the outer wall of the connecting pipe is connected with a water inlet pipe. According to the utility model, the detection probe is inserted into soil, then the
soil humidity sensor is used for collecting soil
humidity information, and then the controller is used for controlling the electric telescopic rod to drive the adjusting cap to ascend and descend according to the soil
humidity, so that when the first water outlet hole and the
nozzle hole are overlapped, sprayed water can be sprayed out according to the
caliber of the first water outlet hole; and when the second water outlet hole is overlapped with the
nozzle hole, the sprayed water is sprayed out according to the
caliber of the second water outlet hole, so that the automatic adjustment of the water quantity is realized.