Low flow positive pressure automatic foam proportioner

A proportional mixing device and small flow technology, which is applied in fire rescue and other fields, can solve the problems that cannot meet the large change range of water flow of foam fire-fighting equipment, and achieve the effect of small starting torque, high control precision and good stability

Inactive Publication Date: 2012-07-04
SHAANXI AEROSPACE POWER HIGH TECH
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AI Technical Summary

Problems solved by technology

[0002] Traditional foam fire pumps can only be used for foam liquid with a fixed ratio and set flow rate. With the change of fire extinguishing requirements, the types of foam liquid continue to increase, and the proportion of foam liquid added to water is constantly changing. The original method of adding foam liquid has been changed. It cannot meet the large change range of the water flow of the foam fire fighting equipment. Therefore, a small flow positive pressure automatic foam proportional mixing device with convenient proportion setting, wide range and large flow change is required.

Method used

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  • Low flow positive pressure automatic foam proportioner

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Embodiment Construction

[0017] The small flow positive pressure automatic foam proportion mixing device of the present invention includes a flow meter B1 for measuring the water flow of the output pipeline of the fire pump, a liquid level switch S1 for setting the foam ratio, and the water flow measured according to the set foam ratio and Foam ratio controller A1 for calculating the speed of the foam metering pump, display and operation meter A2 as the input and output device of the foam ratio controller, foam metering pump for adding foam liquid to the output pipeline of the fire pump 5, speed-regulating motor for driving the foam metering pump Y1, the motor speed sensor B2 that measures the speed of the speed regulating motor Y1; in order to buffer the impact of the liquid level switch on the speed regulating motor, a liquid level relay can be added in the liquid level switch circuit to delay the switching time; the foam metering pump 5 specifically adopts a gear pump .

[0018] The working princip...

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Abstract

The invention relates to a low flow positive pressure automatic foam proportioner, which comprises a flow meter for measuring the water flow of an output pipeline of a fire pump, a liquid level switch for setting the foam proportion, a foam proportion controller for calculating the rotate speed of a foam metering pump according to the set foam proportion and measured water flow, a foam metering pump controller for controlling an adjustable-speed motor according to the calculation result of the foam proportion controller, a display operating instrument served as an input and output device of the foam proportion controller, a foam metering pump for adding foam into the output pipeline of the fire pump and the adjustable-speed motor for driving the foam metering pump. The invention solves the technical problem that primary adding method cannot meet large changing range of water flow of foam fire-fighting equipment, and provides the low flow positive pressure automatic foam proportioner that can add foam solution according to set proportion within a full flow range.

Description

technical field [0001] The invention relates to a proportional adding system, in particular to a small flow positive pressure automatic foam proportional mixing device. Background technique [0002] Traditional foam fire pumps can only be used for foam liquid with a fixed ratio and a set flow rate. With the change of fire extinguishing requirements, the types of foam liquid continue to increase, and the proportion of foam liquid added to water is constantly changing. The original adding method has been It cannot meet the large change range of the water flow of the foam fire fighting equipment, so a small flow positive pressure automatic foam proportional mixing device with convenient ratio setting, wide range and large flow change is needed. Contents of the invention [0003] The purpose of the present invention is to provide a small flow positive pressure automatic foam proportional mixing device, which can add foam stock solution according to the set ratio within the ful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C5/02
Inventor 席建厂张旭马玉琴赵宏民刘晓洪刘楠夏赞丰王俊锋戴辰辰
Owner SHAANXI AEROSPACE POWER HIGH TECH
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