| Details of Innovation |
Five years ago, a farmer approached Dharmendrabhai with his submersible pump with a complaint that it was not lifting water satisfactorily. Though Dharmendrabhai was not an expert on submersible pumps, he studied its design. He learned several lessons, which could be used in ordinary mono block pumps (non-submersible type). He noticed that the rotor was fixed tightly with the shaft and the suction pipe in such a way that the water could not go back once it was lifted from the bore. This was not the case with ordinary mono-block pumps. In the last couple of years, as the water-table depleted, the farmers complained that their pumps were not able to lift water. They were not able to install submersible tube wells since there was no electricity supply. One farmer gave his pump set to Dharmendra and requested him to do something. He thought of adopting some of the features of submersible pumps in the mono-block pumps to increase its efficiency. He plugged all possible gaps from where lifted water went back in the suction pipe and created an obstacle . He noticed a cavity/space surrounding the rotor and periphery of the pump where the delivery pipe was attached. The lifted water rotates with the rotor in this space instead of going up directly to the delivery pipe. To remove this gap, he replaced a bigger rotor of the 3 inch pump into the 2.5 inch pump. He also made the joint of the rotor shaft and the suction pipe fit tightly as observed in the submersible pump to ensure that the water could not go back into the suction pipe again. He installed this modified pump in an open well and found good results. Dharmendrabhai says there are two designs to the mono- block pump: earlier, the attachment for the delivery pipe was provided in the left corner on the rotor. But in the modified pump, this projection is provided in the centre-top of the rotor. |
Honey Bee Network Knowledge & Innovation Database (HBNKIND)