| 摘要 |
<p>Through almost 20 years of personal experience in the field of irrigation in Mexico, I have observed that the traditional shapes of electromechanical equipments (valves and mechanisms and similar) for irrigation systems are generally made with structural steel, bronze and melted iron; these are machined in order to give the final form. The equipment is subjected to anticorrosive treatments and to lubrication. My idea is to eliminate to a large extent serious problems affecting said equipments: problems of design, operation, maintenance and useful life, since these equipments suffer great damages due to black, residual, or alkaline waters, etc. As a result from various investigations, I have developed, tested and verified a combination of machinings, simplifications and/or mouldings which, associated with the simplicity of my designs and the material used, i.e. nylon, polypropylene, polyethylene of ultrahigh molecular weight, polyethylene of high density, PVC, are an ideal alternative solution.</p> |
