JP2014219088A5 - - Google Patents

Claims (10)

A valve device,
A valve that is opened and closed by a rotation operation of the valve body, and a second operation in which a required torque for the rotation operation in the first operation range including a fully closed state is larger than the first operation range. A valve that is greater than the required torque for said rotational motion in range;
And a direct current motor for driving the valve. The valve device according to claim 1, further comprising:
A current cutoff unit provided in a circuit for supplying current to the DC motor, wherein the current cutoff unit cuts off the supply of current to the DC motor when a current greater than a predetermined value larger than a current value at which the DC motor can be continuously operated flows; Prepared,
The valve device is configured to supply a current having a current value larger than the current value capable of continuous operation and smaller than the predetermined value to the DC motor. The valve device according to claim 1 or 2,
The valve device is an eccentric structure valve. The valve device according to claim 1 or 2,
The valve device, wherein the valve is a butterfly valve. The valve device according to any one of claims 1 to 4, further comprising:
A valve device comprising an A / D converter that receives supply of AC power from the outside and converts it to DC power to be supplied to the DC motor. The valve device according to any one of claims 1 to 5, further comprising:
A valve device comprising a battery capable of storing electric power to be supplied to the DC motor. The valve device according to any one of claims 1 to 6, further comprising:
A valve body housing portion for housing the valve body and allowing fluid to flow therethrough;
A rotary shaft that passes through the valve body housing portion and is connected to the valve body, receives the driving force from the DC motor, and rotates the valve body;
A shaft support portion that supports the rotating shaft outside the valve body housing portion such that a gap is provided between the valve body housing portion and the rotating shaft;
A seal member disposed so as to surround the rotating shaft in the gap, and preventing leakage of the fluid from the valve body housing portion;
A valve device, comprising: a sliding bearing disposed so as to surround the rotation shaft between the shaft support portion and the rotation shaft. A valve device according to claim 7, wherein when dependent on claim 2, further
A transmission mechanism that reduces the rotation speed and increases the torque, and transmits the rotation output of the DC motor to the rotation shaft;
A valve device comprising: the DC motor; a circuit for driving the DC motor including the current interrupting unit; and a part of the rotating shaft, and a waterproof protective case. A valve device according to claim 8,
The protective case is
A valve device comprising a ventilation portion that allows air to flow between the inside of the protective case and the outside of the protective case and does not allow liquid water to flow. A valve device according to claim 8 or 9,
The protective case is a valve device coated with anticorrosion paint.