Quartz sand weighing and conveying equipment capable of accurately controlling feeding amount

The utility model discloses quartz sand weighing and conveying equipment capable of accurately controlling feed quantity, which comprises a storage tank, a guide rail, a bottom discharge port, a discharge control component, a machine body, a feed port, a weighing component, an air bag, an internal pipeline, a feed control component, a rotating motor, a rotating rod, a valve core, a limiting block, a limiting rod, a supporting spring, a bottom plate, an inner plug block, a plugging block and a return spring, when feeding is started, quartz sand accumulated on the upper surface of the bottom plate exerts gravity on the bottom plate, the bottom is made to move downwards, after the bottom plate reaches the position above the air bag and presses the air bag downwards, air in the air bag flows to the area where the feeding control component is located along an internal pipeline, and the feeding control component conducts feeding. And the inner plug block is pushed to move leftwards, so that the blocking block block