Measurement injecting type proportion mixing device

Abstract

The invention discloses a measurement injecting type proportion mixing device comprising a proportioner, a foam concentrate supply mechanism and a fire fighting water pipeline, wherein the foam concentrate supply mechanism and the fire fighting water pipeline are communicated with the proportioner; the foam concentrate supply mechanism comprises a foam concentrate storage tank, a foam concentrate delivery pump, a foam concentrate delivery pipeline, an engineering single board computer PC and a transducer, wherein the fire fighting water pipeline and the foam concentrate delivery pipeline are respectively provided with a fire fighting water flow sensor and a foam concentrate flow sensor; two flow sensors are respectively connected with the electrical signal of the engineering single board computer PC; the engineering single board computer PC is connected with the electrical signal of the transducer; the transducer is connected with the electrical signal of the foam concentrate delivery pump so as to control the revolving speed of the foam concentrate delivery pump. The measurement injecting type proportion mixing device of the invention takes automatic instrument measurement as a main control unit, uses a microcomputer transducer for controlling according to the flow change of a water supply system, can keep fire fighting water and foam liquid in a stable proportion, has high precision degree of mixing ratio and is convenient to adjust the mixing ratio.

Description

technical field [0001] The invention relates to a fire-fighting device, in particular to a metering injection type proportional mixing device. Background technique [0002] The foam proportional mixing device is an important device for extinguishing Class A, B, and C liquid fires in firefighting. Due to the difference in the foam stock solution, there are two mixing ratios between it and fire-fighting water: 3% and 6%. Most of the foam proportional mixing devices currently available on the market are diaphragm tank type or balance valve type. These two devices are all mechanically adjusted. Uniformity, there are the following problems: [0003] (1) The mixing ratio of foam stock solution and fire water is poor; [0004] (2) Only one mixing ratio is applicable, and the throttle orifice needs to be replaced when adjusting the mixing ratio; [0005] (3) Due to the poor accuracy of the mixing ratio, the loss of foam stock solution is large, which increases the cost of fire ex...

AI Technical Summary

Problems solved by technology

[0003] (1) The mixing ratio of foam stock solution and fire water is poor;

[0004] (2) Only one mixing ratio is applicable, and the throttle orifice needs to be replaced when adjusting the mixing ratio;

[0005] (3) Due to the poor accuracy of the mixing ratio, the loss of foam stock solution is large, which increases the cost of fire extinguishing;

[0006] (4) Poor fire suppression reliability

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