The Research Of Controlled Water-saving Valve With Humidity Sensitive Materials

The water resource being short has become the serious problem which the world faces .At present ,the auto-degree of the civil water-saving irrigation equipments is at large on the low side .while the cost of the overseas water-saving equipments is relatively high . The auto-adapted water-saving valve is one kind of high-automated and low-cost and un-power smart control equipment which is designed according with present domestic and foreign water-saving irrigation equipments' flaws.The central content and conclusion of the text is as follows:1. The choice of the controlled part .Through referring to massive literature materials ,it screens out the TERRACOTTEM water-holding aqua,the wood-fiber composed bibulous aqua,the carboxyl-cymene-cellulose sodium,the wood fibe,the Jew's-ear,the expand-sopping rubber as researched object. Analyzed and transpire that the mixture of the water-holding aqua,the wood fiber and the Jew's-ear is the best choice.2. Study the microstructure of the controlled part. Mixing the TERRACOTTEM water-holding aqua, the wood fiber and the Jew's-ear at different proportions, observe the changes of the microstructure at the different soil moistures. Along with the increase of the soil moisture, the interior structure of the mixture is gradually compact.3. Study the using life of the controlled part. Its capability is steady after being used ten times in irrigation, but its life-span is uncontained.4. The simulative experiment. Mixing the TERRACOTTEM water-holding aqua,the wood fiber and the Jew's-ear at appropriate proportions, put it into the auto-adapted water-saving valve and do the simulative experiment. The auto-adapted water-saving valve can carry out auto-irrigation function.The research uses the idiosyncrasies of the special materials to achieve automatic control. The idea is novel. It provides effective mentality for the farther research of the irrigation equipments.The research comes true that the water-saving irrigation equipment can trace and monitor and irrigate at the same time. It fills up domestic and foreign blanks.