Volleyball serving device for physical education

The volleyball serving device for physical education comprises a base, the left side and the right side of the base are each provided with an inverted-U-shaped supporting seat, the two U-shaped supporting seats are rotationally connected with a supporting frame, and a ball storage frame is arranged at the upper end of the supporting frame; sliding rings are arranged on the left side and the right side of the ball storage frame, the sliding rings are slidably connected with adjusting rods, check rings are arranged on the peripheries of the adjusting rods, reset springs are arranged between the sliding rings and the check rings, limiting pointed ends are arranged at the lower ends of the adjusting rods, and limiting clamping teeth are arranged on the arc-shaped peripheries of the inverted-U-shaped supporting seats; the supporting frame is provided with an upwards-inclined ball serving cylinder below the ball storage frame, the middle of the ball serving cylinder is communicated with the lower end of the ball st