Current limiting closed exhaust valve used for aerostat and control method used for limiting same

• Main Authors: HE XIAOHUI, HUANG WANNING
• Format: Patent
• Language: English
• Published: 09.12.2015
• Subjects: AIRCRAFT; AVIATION; COSMONAUTICS; LIGHTER-THAN AIR AIRCRAFT; PERFORMING OPERATIONS; TRANSPORTING

The invention provides a current limiting closed exhaust valve used for an aerostat and a control method used for limiting the same. The exhaust valve comprises a motor, a screw, a valve cover, a seal ring, a column, a pedestal, an upper limiting member, a control circuit, a gear block, a support, a base, a driven wheel and a valve body, wherein the valve body covers on the seal ring and the valve port of the valve body. The control circuit is connected with the motor. The motor is connected with the valve cover and used for controlling the valve cover to move upwards and downwards along the screw. The upper limiting member is connected with the control circuit. The gear block is fixedly connected with the screw. When the motor rotates, the motor makes the gear block move upwards and downwards along the screw, the gear block contacts with the upper limiting member, the upper limiting member cuts off the control circuit, and the motor stops to make the valve cover be in a maximal opening state. When the motor rotates anticlockwise, the motor makes the gear block move downwards, the valve cover contacts with the seal ring to reach a preset compaction state, a pretightening force between the valve cover and the seal ring is kept, the current of the control circuit is limited to cut off the power supply to the motor, the valve cover can be automatically closed and in a sealed and closed state.