Non-return device of fan outlet and fan with non-return device

Abstract

The invention provides a non-return device of a fan outlet and a fan with the non-return device, and belongs to the technical field of fans. The non-return device of the fan outlet comprises a non-return assembly, a blade set, a driving structure and a control system, wherein the non-return assembly is installed at the outlet position of the fan, the blade set is used for blocking the fan outlet, the driving structure is connected with the blade set of the non-return assembly through a transmission structure, and the control system is connected with the driving structure and the fan. According to the non-return device of the fan outlet, the change of the air volume does not need to be considered, the non-return assembly can be fully opened as long as the fan is electrified and started, a constant flow resistance system in a pipeline of the fan is guaranteed, and the air supply amount is guaranteed.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a non-return device for fan outlets and a fan with the same. Background technique [0002] The fan is a mechanical device for conveying gas; [0003] A nuclear power plant refers to a facility that converts nuclear energy into electrical energy through appropriate devices. Nuclear power plants use nuclear reactors instead of boilers in thermal power plants, and use nuclear fuel to generate heat in a special form of "combustion" in nuclear reactors, turning nuclear energy into thermal energy to heat water and generate steam. [0004] The pipeline design of nuclear power plants is complex, and the pipeline specifications are various. Generally, mechanical check valves are installed at the outlet of the fan. The specifications vary accordingly, but the requirements for the flow resistance of the valves are basically the same (ξ≤1). [0005] When the fan is running, as the air volume ...

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the fan operation in the prior art, as the outlet air volume of the fan changes, the opening of the outlet check valve will also change, and the opening will decrease when the air volume is small. Due to the small flow area, the flow resistance increases, even exceeding the requirements of the technical specification, which cannot meet the requirements of the nuclear power plant for the flow resistance and flow of the ventilation system, and also reduces the defect of the flow efficiency, thus providing a non-return device for the fan outlet

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