Gas-liquid mixing device

Abstract

The invention discloses a gas-liquid mixing device. The gas -liquid mixing device comprises a gas inlet, a liquid inlet and a mixed solution outlet, wherein the gas inlet and the mixed solution outlet are formed in the same axial line, a combining part of the gas inlet and the mixed solution outlet is an annular nozzle, an included angle alpha formed by the annular nozzle is 45-80 degrees, an annular liquid cavity is arranged at the inlet end of the annular nozzle in a surrounding manner and is connected with the liquid inlet; the annular nozzle can be opened or closed, the width of the annular nozzle can be adjusted; the liquid inlet is formed along a radial direction or a tangent direction of the annular liquid cavity. The gas-liquid mixing device has the advantages that a conventional mixing structure is changed, the spraying is performed by adopting the annular nozzle with a certain slope as a liquid outlet, a negative pressure higher than that of a conventional nozzle can be generated, more gas is sucked, relatively high foam expansion ratio is generated, fluid flows without resistance, the device has no recoiling force, and is relatively long in spraying distance; the mixed solution outlet can be adjusted, and even closed, so that the liquid flow is adjusted; the gas-liquid mixing device is simple in structure, convenient to operate; the cost of system equipment is lowered.

Description

technical field [0001] The invention belongs to the field of design and manufacture of fire-fighting equipment, in particular to the field of design and manufacture of mixed equipment for compressed air, foam and water fire-fighting, and particularly relates to a gas-liquid mixing device. Background technique [0002] In fire extinguishing equipment, air, foam, and water mixing are often used to realize multi-type fire extinguishing. The existing mixing device usually adopts the design structure of Venturi principle. The air direction is on the outer layer of the liquid, and the liquid nozzle is a method of foaming with round holes or multiple round holes or a high-mesh filter. [0003] For example, Chinese patent application 201310060259.0 discloses a gas-liquid mixing device, including a mixing chamber for gas-liquid mixing. The mixing chamber is a hollow cylinder. One end of the cylinder is a liquid inlet, and the other end is a mixed liquid outlet. There is a gas inlet ...

AI Technical Summary

Problems solved by technology

The gas-liquid mixing device with this structure has the disadvantages of low vacuum forming ability, low gas-liquid mixing uniformity, short spraying distance, and low foaming ratio.

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