Water mist sprayer

Abstract

The invention discloses a water mist sprayer which comprises a water inlet, a mixing cavity and a water outlet, wherein the water inlet comprises a central water inlet channel and a plurality of lateral water inlet channels. Axial lines of the lateral water inlet channels are perpendicularly intersected with a radial line of the mixing cavity, and included angles larger than 0 degree and smaller than 90 degrees are formed by the axial lines of the lateral water inlet channels and the radial plane of the mixing cavity. The plurality of lateral water inlet channels are symmetrically arranged around the central water inlet channel, and the distance between each lateral water inlet channel and the central water inlet channel is smaller than the radial radius of the mixing cavity. The water mist sprayer has large axial momentum, maximally enables mist drops to penetrate through fire field space to achieve deep extinguishing, simultaneously keeps radial momentum of water mist, increases atomization angles of the water mist, enlarges an extinguishing range of the water mist, and is small in size, simple in structure, convenient to manufacture, low in manufacture cost and capable of being volume-produced. Experiments show that the water mist sprayer has good atomization performance and kinetic energy indexes and good fire extinguishing capability.

Description

technical field [0001] The invention belongs to the design field of fire-fighting safety equipment, in particular to the design and manufacture of water guns in fire-fighting equipment, and in particular to the design and manufacture technology of water mist nozzles of water guns. Background technique [0002] In recent years, water mist fire extinguishing technology has gradually replaced halon fire extinguishing agent and become the mainstream fire extinguishing technology because of its environmental protection, high efficiency, and non-toxicity, and it is one of the hot spots in fire science research. At present, the research on fine water mist fire extinguishing technology has made significant progress, but the fine water mist nozzle is the bottleneck that curbs its further development. The atomization effect of the traditional direct atomization nozzle is not ideal, the atomization angle is small and the protection radius is small. The scope of application of the water...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that ① the rotating core will increase the energy loss of the fluid, resulting in low spray momentum of the nozzle

②The rotary core will lead to a complex structure of the nozzle and an increase in the size of the nozzle. If it is not used for a long time, it will easily cause the blockage of the rusted flow channel, and the high-precision rotary core will also increase the manufacturing cost.

③If the atomization is assisted by centrifugal force too much, the mist sprayed by the nozzle will form a hollow cone instead of a solid cone, and the distribution of spray density will be uneven, and the high suffocation effect of fine water mist cannot be fully exerted

The disadvantage of this structure is that when the water flow enters through two inlets tangential to the inner wall of the nozzle, although a strong swirling flow can be generated, the energy loss of the nozzle in terms of axial momentum is relatively large, which is not conducive to deep fire extinguishing

Images