Controllable open rotational netting case that subtracts

The utility model discloses a controllable open rotational netting case that subtracts, including the annular bearing structure and the string bag, string bag opening makes progress and the edge -fixed inner wall at annular bearing structure of opening, annular bearing structure's both sides are equipped with open anti -rolling tank respectively, be equipped with the rolling sensor in the open anti -rolling tank, water pump and choke valve, be equipped with control system in the rolling sensor with control pump and choke valve, the choke valve passes through pipeline and water pump intercommunication, open anti -rolling tank passes through choke valve and outside intercommunication, be equipped with two microgenerators on annular bearing structure's the top in order to be connected with the rolling sensor and the water pump electricity of both sides respectively. The utility model provides an aperture of the steerable choke valve of rolling sensor realizes the control to open anti -rolling tank's inflow, make