A Compound Mixing Proportional Valve

Abstract

The invention discloses a compound mixing proportional valve, which comprises a casing, a water inlet pipe, a foam agent delivery pipe, a venturi tube, a mixing box and a mixed solution delivery tube, the mixing box is fixed inside the casing, and the venturi tube horizontally crosses the mixing box. The Venturi tube is assembled from two parts, and a mating surface in the mixing box is formed between the two parts. The outer shell is provided with a water inlet pipe installation port, a foam agent delivery pipe installation port and a mixed liquid delivery pipe installation port. The water inlet pipe extends into the housing through the water inlet pipe installation port and connects with one end of the Venturi tube, the other end of the Venturi tube is connected with one end of the mixed liquid delivery pipe, and the other end of the mixed liquid delivery pipe protrudes through the installation port of the mixed liquid delivery pipe The casing and the foam agent delivery pipe extend into the casing through the installation port of the foam agent delivery pipe to connect with the mixing box, and a water inlet branch pipe is installed between the water inlet pipe and the foam agent delivery pipe. The invention can uniformly and fully mix the foam agent and the fire-fighting water, and ensure the foaming ratio of the foam liquid of the low-expansion foam gun.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing equipment, in particular to a mixing proportional valve. Background technique [0002] At present, the proportional valves used in fire-fighting foam generators at home and abroad are directly mixed with source water (water provided by fire-fighting pumps or fire-fighting systems). The foaming rate and its foaming multiple, so that the coverage area under the same conditions is reduced, the cost of fire extinguishing is increased, and a lot of manpower and material resources are wasted. [0003] Therefore, how to solve the above technical problems has become the direction of efforts of those skilled in the art. Contents of the invention [0004] The object of the present invention is to provide a compound mixing proportional valve, which can completely solve the disadvantages of the above-mentioned prior art. [0005] The purpose of the present invention is achieved through the foll...

AI Technical Summary

Problems solved by technology

[0002] At present, the proportional valves used in fire-fighting foam generators at home and abroad are directly mixed with source water (water provided by fire-fighting pumps or fire-fighting systems). The foaming rate and its foaming multiple, so that the coverage area under the same conditions is reduced, the cost of fire extinguishing is increased, and a lot of manpower and material resources are wasted.

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