| 摘要 |
PROBLEM TO BE SOLVED: To provide a pumping device capable of preventing electric corrosion of a pumping pipe provided in a well.SOLUTION: A pumping device comprises an electric pump and a pumping pipe 2 for pumping up from a well, and provides the electric pump on the lower side of the pumping pipe 2, and since the pumping pipe 2 comprises a synthetic resin pipe body 11 and metallic flanges 12 and 12 provided on both ends of this pipe body 11, the synthetic resin pipe body 11 becomes an insulator, and can prevent electric corrosion of the pumping pipe 2. Joining work is easy and predetermined joining strength is provided by using the metallic flanges 12 for joining. The flanges 12 and the pipe body 11 can also be easily connected by using a connection pipe part 13.SELECTED DRAWING: Figure 2 |
