Large-flow compressed air and foam mixing device

Abstract

The invention discloses a large-flow compressed air and foam mixing device and relates to the technical field of compressed air and foam mixing devices. The large-flow compressed air and foam mixing device solves the problem that because existing air-liquid mixing devices are simple in structure and air and liquid cannot be fully mixed when the flow of foam-mixed liquid is increased, the foaming quality is influenced. The large-flow compressed air and foam mixing device comprises a foam-mixed liquid nozzle. The foam-mixed liquid nozzle is connected with a mixing cavity, a conical turbulence device is arranged in the mixing cavity, the tail end of the conical turbulence device is connected with a secondary turbulence device, inner wall surface bosses are arranged on the inner side of the pipe wall of the mixing cavity, the arrangement length of the inner wall surface bosses on the inner wall surface of the mixing cavity is equal to the total length of the conical turbulence device and the secondary turbulence device, and air inlet pipes are uniformly arranged on the end surface, connected with the foam-mixed liquid nozzle, of the mixing cavity.

Description

technical field [0001] The invention relates to the technical field of compressed air foam mixing devices, in particular to a large-flow compressed air foam mixing device. Background technique [0002] At present, compressed air foam fire extinguishing devices at home and abroad are mainly used in fire trucks, foam guns and other fire extinguishing devices. The flow rate is relatively small, and it is mainly used to put out general-scale fires. The gas-liquid mixing device is relatively simple, such as wire mesh, orifice plate etc. These fluid spoilers have relatively large resistance to the fluid, which affects the spraying distance of the compressed gas foam. When the flow rate of the foam mixture increases, the existing gas-liquid mixing device has a simple structure, which is not enough to ensure sufficient gas-liquid mixing, thereby affecting the foaming quality and further affecting the fire extinguishing effect of the fire extinguishing device. Contents of the inven...

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Problems solved by technology

[0002] At present, compressed air foam fire extinguishing devices at home and abroad are mainly used in fire trucks, foam guns and other fire extinguishing devices. The flow rate is relatively small, and it is mainly used to put out general-scale fires. The gas-liquid mixing device is relatively simple, such as wire mesh, orifice plate etc. These fluid spoilers have a large resistance to the fluid, which affects the spray distance of the compressed gas foam

When the flow rate of the foam mixture increases, the structure of the existing gas-liquid mixing device is simple, which is not enough to ensure that the gas-liquid is fully mixed, thereby affecting the quality of foam foaming, and further affecting the fire extinguishing effect of the fire extinguishing device

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