Foam fire extinguisher

Abstract

The invention discloses a foam fire extinguisher. The foam fire extinguisher comprises a fire extinguishing water pipe, driving water pipes, a sucking pipe, a discharging pipe, a vane wheel, a foam liquid pump and a foam liquid tank; two driving water pipes are arranged; one end of each driving water pipe is connected with the corresponding end of the fire extinguishing water pipe; the other end of each driving water pipe is connected with the vane wheel; an output shaft of the vane wheel is connected with the foam liquid pump; a liquid inlet of the foam liquid pump is connected with one end of the sucking pipe; the other end of the sucking pipe is connected with the foam liquid tank; a liquid outlet of the foam liquid pump is connected with one end of the discharging pipe; and the other end of the discharging pipe penetrates through the outer wall of the fire extinguishing water pipe and is arranged in the fire extinguishing water pipe. According to the foam fire extinguisher disclosed by the invention, the injection flow rate of the foam liquid is in direct proportion to the flow rate of fire extinguishing water, so that the purpose of automatically regulating the flow rate of the foam liquid at a constant proportion is achieved, and the waste of the foam liquid is avoided. The foam fire extinguisher is simple in structure and good in using effect, and facilitates popularization and use.

Description

technical field [0001] The invention relates to the technical field of fire fighting equipment, and more specifically, to a foam fire extinguisher. Background technique [0002] Since the fire-fighting water sprayed by the foam fire-fighting system has a large amount of foam and its good adhesion and isolation capabilities, it is especially suitable for oil-based fire extinguishing, so this kind of fire-fighting system is also widely configured on offshore ships. like figure 1 As shown, the system consists of fire pumps, valves, foam mixers, foam monitors and pipelines. After an oil fire occurs, open the valve, start the fire pump, and the fire water flows through the foam mixer from the pipeline. The high-expansion foam liquid in the foam mixer tank is mixed with the fire water to form fire water rich in foam. When sprayed out, a large amount of foam adheres to the burning oil, which isolates the oil from the air and achieves the purpose of extinguishing the fire. The co...

AI Technical Summary

Problems solved by technology

However, the current marine foam mixers all adopt the Venturi tube type with simple principle, which has defects such as uneven mixing of foam liquid and poor ability to automatically adjust the flow rate, which affects the fire extinguishing effect

At the same time, it is also impossible to automatically adjust the flow rate at a constant ratio, resulting in a large waste of foam liquid and poor economic efficiency.

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