I. Product Introduction

The working principle of semi-fixed (portable) foam fire extinguishing devices

The semi-fixed (portable) foam fire extinguishing device connects its proportioning mixer's pipe socket ends to the fire hose and the water source under pressure. When water at a pressure of not less than 0.6 MPa flows at high speed through the nozzle of the proportioning mixer, due to the lateral movement and diffusion of the jet particles, a vacuum (negative pressure) is formed inside the mixer. As a result, the foam liquid in the foam liquid storage tank is forced into the mixer through the suction pipe by atmospheric pressure, mixing with the pressurized water to achieve a certain proportion of mixed liquid. When the mixed liquid, at a certain pressure, reaches the foam gun, the foam gun's performance draws in a certain amount of air, causing the foam mixture to foam. This achieves the effect of foam fire extinguishing.

Performance parameters of semi-fixed (portable) foam ratio mixing equipment

IV. Structural Composition

Portable semi-fixed foam ratio mixing unit, consisting of a cart, foam tank, ratio mixer, spraying equipment (foam gun), water hose, safety valve, control valve, and some auxiliary parts. Available in volumes of 100, 200, 300, 400, 500, 700, 800, and 1000 liters, with flow rates of 4L/S and 8L/S.

Instructions

During fire extinguishing, the pipe sockets at both ends of the proportioning mixer are connected to the fire hose and the pressure water source. As the pressure water flows through the proportioning mixer of the foam fire extinguishing unit, a vacuum is formed inside the proportioning mixer. Under the pressure of the atmosphere, the foam extinguishing agent in the foam liquid storage tank enters the proportioning mixer through the suction pipe, mixes with the pressure water, and reaches a certain proportion of foam mixture. When the foam mixture under pressure flows to the foam gun, due to the foam gun's ability to吸入(a certain amount of) air, it causes the foam mixture to foam. This achieves the effect of foam fire extinguishing.