Fire-fighting foam mixing ratio control method, system and fire-fighting truck provided therewith

Abstract

The invention discloses a fire-fighting foam mixing ratio control method which is used for controlling the mixing ratio of foam liquid and water. The method is conducted through the following steps: acquiring the mixing ratio value required for the current working condition; judging whether the mixing ratio value required for the current working condition is smaller than the preset mixing ratio value or not; and acquiring the flow value of the mixed liquid in real time provided when the mixing ratio value for the current working condition is smaller than the preset mixing ratio value, lookingup the foam liquid flow control valve opening degree corresponding to the mixed liquid flow value according to a first relational table of the mixed liquid flow value and the foam liquid flow controlvalve opening degree under the preset mixing ratio value needed, and outputting a drive signal for controlling the foam liquid flow control valve opening degree. When the control method is in practical use, if the mixing ratio value of foam liquid and water is lower than the mixing ratio value preset by a system, the real time flow value of the mixed liquid is measured to look up the drive signalof the corresponding foam liquid flow control valve opening degree, so as to control the opening degree of the foam liquid flow control valve. On the basis, the invention further provides a fire-fighting foam mixing ratio control system and a fire-fighting truck provided therewith.

Description

technical field

[0001] The invention relates to fire-fighting equipment, in particular to a fire-fighting foam mixing ratio control method, a system and a fire-fighting vehicle equipped with the system. Background technique

[0002] With the gradual development of the fire protection industry, there are more and more types of foam liquids suitable for Class A and Class B fires. When in use, the foam liquid and water are mixed according to a certain ratio, and when the foam gun or foam gun is sprayed, air is sucked in to form foam, which is sprayed on the surface of the burning object to form a covering layer to achieve the purpose of fire extinguishing.

[0003] At present, the foam proportion mixing system of fire trucks is divided into two categories, one is the positive pressure foam proportion mixing system, and the other is the negative pressure foam proportion mixing system. Due to the high price of the positive pressure foam proportional mixing system, it is rarely u...

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