Mobile foam brush washing system including mixing apparatus for foam generation

A mobile apparatus for providing a foam from a mixture of fluids, and comprising, in combination:

• a mobile cart;
• water supply means on said cart for receiving water at a predetermined pressure;
• fluid chemical container means on said cart for storing a supply of fluid chemical;
• venturi means operatively connected to said water supply means and said fluid chemical container means for mixing water and fluid chemical in a predetermined ratio to provide a fluid chemical-water mixture;
• air supply means mounted on said cart for providing compressed air;
• mixing means mounted on said cart and operatively connected to said air supply means and to said venturi means for mixing said compressed air and said fluid chemical-water mixture in a predetermined ratio to provide a combined fluid mixture of air, water, and chemical;
• foam generator means mounted on said cart for receiving said combined fluid mixture of air, water, and chemical to generate a foam therefrom, said foam generator means comprising:
• a fluid inlet for receiving said combined fluid mixture of air, water, and chemical;
• a first expansion turbulator connected to said fluid inlet and said first expansion turbulator having means for generating a turbulence in said combined fluid mixture flowing through said first expansion turbulator;
• relatively quiescent flow path expansion means for receiving fluid which has traversed said first expansion turbulator;
• second expansion turbulator having means for generating a turbulence in the fluid flow therethrough in fluid communication with said flow path expansion means for receiving fluid flow therethrough;
• a fluid outlet means connected to said second expansion turbulator for receiving fluid flowing therefrom, and said second expansion turbulator having a larger cross-sectional dimension than said flow path expansion means, and said second expansion turbulator having a larger cross-sectional dimension than said first expansion turbulator.