Venturi tube-based foam liquid proportion adjustable mixer

Abstract

The invention discloses a venturi tube-based foam liquid proportion adjustable mixer. The mixer comprises a venturi tube, a first pipeline, a second pipeline, a hydraulic thin film actuator, a controlvalve, a support and an upper end adjusting module, wherein the upper end adjusting module, the hydraulic thin film actuator, the support, the control valve and the venturi tube are sequentially connected from top to bottom; and the hydraulic thin film actuator comprises an actuator upper shell, an actuator lower shell, a rubber thin film, a thin film pressing sleeve, a thin film lower support, an executing mechanism step rod, a packing screw sleeve, a pressing sleeve nut and a packing box. According to the mixer, the problem of the mixed proportion of the foam liquid can be effectively solved through the design of the hydraulic thin film actuator, the mixing ratio range is controlled to be 3%-6%, and high reliability and larger foam liquid storage capacity are achieved; and the venturi tube is adopted as a foam and liquid mixing tube, so that the resistance generated by the fluid is reduced, and the energy consumption is reduced as well.

Description

technical field [0001] The present invention relates to the technical field of mixers, and more specifically relates to a mixer with adjustable foam-to-liquid ratio based on a Venturi tube. Background technique [0002] The foam liquid proportional mixer is the core equipment and key component of the foam fire extinguishing system. Foaming device for foam fire fighting liquid with fire extinguishing performance. Its purpose is to continuously produce mixed foam liquid that meets the regulations, and can be used in fire-fighting foam fire extinguishing operations and fire prevention. The foam fire extinguishing system has the advantages of reliable installation, economical and practical, and high fire extinguishing efficiency, especially for fighting Class B fires. It is the basic way of fighting oil fires at home and abroad. [0003] The most critical indicator to measure the performance of a foam proportional mixer is the mixing ratio of foam and water. However, the exis...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of unstable working mixing ratio, large pressure loss, low reliability and insufficient foam liquid storage caused by the mixing ratio range of more than 6% in the existing foam proportioning mixer. The mixer with adjustable foam liquid ratio not only greatly improves the stability of the working mixing ratio and reduces the pressure loss, but also can effectively solve the problem of the mixing liquid ratio, so that the mixing ratio is controlled at 3% to 6%. Compared with the positive pressure type foam proportioner, it has higher reliability and larger foam liquid storage

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