Gas exhaust device for aerostat

Abstract

The invention provides a gas exhaust device for an aerostat. The gas exhaust device comprises a valve. The valve comprises a valve body and a valve cover, wherein the valve body is provided with a valve port, and the valve cover covers the valve port in an openable and closable mode. The valve body is fixed to a gas suction and exhaust port of a gas bag in the circumferential direction of the gas bag of the aerostat through a valve body installing mechanism, wherein the valve cover covers the valve port in the openable and closable mode through a control device with an opening and closing device. The opening and closing device comprises a drive mechanism and a valve cover reset mechanism, wherein the drive mechanism is connected with the valve cover and used for driving the valve cover to be vertically lifted at a preset height and driving the valve cover to tilt and be kept at a certain angle after the valve cover is vertically lifted at the preset height. The valve cover reset mechanism is connected with the valve cover and pushes the valve cover to reset to cover the valve port after the drive mechanism stops driving the valve cover. The valve cover can be vertically lifted and can tilt at the same time, the gas exhaust area is increased, collision between gas and the valve cover is reduced, and the gas exhaust speed is increased.

Description

technical field [0001] The invention relates to the technical field of aerostats, in particular to an exhaust device for aerostats. Background technique [0002] An aerostat generally refers to a soft-structure aircraft whose specific gravity is lighter than air and relies on atmospheric buoyancy to lift into the air. The aerostat is composed of an airbag made of polymer composite material and various equipment and payloads arranged on the airbag. The airbag is filled with a buoyant gas with a density lower than that of air, and the density difference between the inside and outside of the airbag provides the aerostat buoyancy, thereby completing the lift-off of the aerostat. Aerostats generally include balloons and airships. The formed aerostat lifts off from the ground, and as the flight altitude increases, the density of the outside air and atmospheric pressure gradually decrease, and the volume of the buoyant gas in the aerostat expands rapidly. In order to be safe and...

AI Technical Summary

Problems solved by technology

[0006] 2. The valve cover 200 takes a long time to close, which affects the precise control of the pressure difference inside and outside the airbag

In addition, the pitch of the screw mandrel 400 also requires that it cannot be too large, and the motor 300 cannot rotate too fast or the torque is not enough, and at the same time, in order to facilitate exhaust, the opening stroke of the valve cover 200 needs to be very long. When the valve cover is 200, the movement of the screw rod 400 nut (thread) cannot be too fast, generally it takes 5-10 seconds. During this process, the pressure difference inside and outside the airbag has changed. When the command to close the exhaust device is started, it takes 5-10 seconds for the valve to be completely closed, so that when it is closed, the pressure difference has become about 3.8g, so the valve is not closed in time, which will affect the pressure difference control accuracy

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