Mixing device for compressed air foam fire extinguishing system

Abstract

The present invention discloses a mixing device for a compressed air foam fire extinguishing system. When water and high-pressure gas enter the mixing barrel to drive the impeller to rotate, the water and foam liquid are fully mixed, and the impeller drives the rotating shaft to rotate. The rotating shaft drives the gear to rotate, and the gear drives the rack to move in a straight line, and the rack drives the foam liquid flow regulating plate to twitch in the foam liquid pipe, and the elastic member is pulled at this time; when the air pressure is small, the impeller speed decreases, and the rotating shaft drives the gear When the rotation speed of the motor is reduced, the kinetic energy obtained by the rack is reduced, the elastic member is reset to drive the rack to move in reverse, and the rack drives the flow regulating plate to move in reverse, thereby realizing the flow regulation of the foam liquid.

Description

technical field [0001] The invention relates to the technical field of fire fighting equipment, in particular to a mixing device for a compressed air foam fire extinguishing system. Background technique [0002] Foam fire extinguisher, the fire extinguishing principle is that when the fire is extinguished, a large amount of carbon dioxide and foam can be ejected, and they can adhere to the combustible material to isolate the combustible material from the air to achieve the purpose of fire extinguishing. Foam fire extinguishers are divided into: portable foam fire extinguishers, carts Foam fire extinguishers and air-type foam fire extinguishers should be stored in a dry, cool, ventilated and easily accessible place, and should not be close to places with high temperature or exposure to sunlight to prevent carbon dioxide from decomposing and failing. In winter, antifreeze measures should be taken to avoid Prevent freezing, and should always wipe off dust and unclog the nozzle ...

AI Technical Summary

Problems solved by technology

[0003] For example, according to the "compressed air foam fluid mixing device" provided by the Chinese patent application number CN201922341292.6, the compressed air and the foam mixed liquid can enter in the same direction, and the design of the gas-liquid two-phase flow in the mixing chamber is greatly weakened. The impact of air on the foam solution and the resulting pulsation. In addition, the ratio of water and foam liquid in the mixing device needs to be manually adjusted, which is less efficient

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