Butterfly window actuator

Abstract

The invention discloses a butterfly window actuator which comprises a double-shaft motor and a control panel for controlling the double-shaft motor. Transmission assemblies for opening and closing a butterfly window are connected to main shafts on the two sides of the double-shaft motor respectively, and switch assemblies for controlling the stroke of the double-shaft motor are arranged around themain shafts of the double-shaft motor. The double-shaft motor is controlled to rotate by the control panel to drive the transmission assemblies connected to the double-shaft motor to move, rotation displacement of the double-shaft motor is transmitted to the butterfly window connected with the transmission assemblies, thus the butterfly window is driven to generate displacement, signals are fed back to the control panel through the switch assemblies so that stopping of the double-shaft motor can be accurately controlled to ensure the butterfly window to be just in an open or closed state, more precision is achieved compared with the delay control of the control panel, the excessive opening and closing of the butterfly window caused by the delay of the control panel are avoided, and the butterfly window is protected.

Description

technical field [0001] The invention belongs to the field of fan automatic control, in particular to a butterfly window actuator. Background technique [0002] Fans are widely used in industrial production, and the control of fans is also tending to the automatic control stage. For some ventilation pipelines with stricter requirements, in order to avoid the return air generated by the negative pressure when the fan is turned off, the external environment When impurities are introduced into the pipeline, it is usually necessary to install a closing valve to make the fan stop rotating and close the channel at the same time, so as to ensure the cleanliness inside the ventilation pipeline. The butterfly window is a better closing valve. At present, there are mainly two kinds of opening devices for butterfly windows, one is a spring device, and the other is a damper device. The spring device uses the wind force of the fan to blow open the butterfly window. At this time, the spri...

AI Technical Summary

Problems solved by technology

The spring device uses the wind force of the fan to blow open the butterfly window. At this time, the spring is stretched. When the fan stops energizing, the wind force weakens. Depending on the tension of the spring, the butterfly window will naturally return to the original closed state. The disadvantage is that the switch of the butterfly window is related to the speed of the blades of the fan. If it is too small, it cannot be opened, which wastes energy. If the elastic coefficient of the spring is reduced, the sealing of the butterfly window cannot be guaranteed, which will cause the butterfly window of the spring device to blow. The anti-negative pressure ability is weak; the air valve device uses the fan to open and obtain the signal to open or close the butterfly window. Since the design of the valve actuator cannot avoid a long execution time, the opening or closing time of the butterfly window is usually too long , can not achieve the anti-return effect when the fan is turned off

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