| 摘要 |
A U-shape flowmeter is provided to measure a flow accurately and to cut down a production process and a cost by inserting a permanent magnet into one of four grooves for an impeller. A U-shape flowmeter comprises a lower end body(10), an impeller(20), a permanent magnet(30), an upper end body(40), a circuit substrate(50), and a cover(60). The lower end body is formed with an inlet(11) receiving fluid from an outside, an outlet(12) discharging the fluid to the outside, a fixing shaft(13) having a groove at a middle portion, and a fixing hole(14) positioned at an edge portion. The impeller includes a wing(21) rotated according to a flow of the fluid flowed through the inlet of the lower end body, a body(23) positioned at an upper end of the wing and formed with four grooves(22), and a rotating shaft(24) penetrated to the wing and a center portion of the body and connected with the fixing shaft of the lower end body. The permanent magnet is inserted into one of the four grooves for the impeller to form a magnetic field vertically at a moving direction of the fluid. The upper end body includes the fixing shaft(41) having the groove to fix and insert the rotating shaft of the impeller, a rubber packing(42) preventing the fluid from being discharged, and the fixing hole(43) positioned at the edge portion. The circuit substrate is positioned at an outer surface of the upper end body and formed with a lead switch(51) receiving a magnetic signal from the permanent magnet, and a wire(53) having a connection terminal(52) connected with a meter to deliver a signal of the lead switch, to change the signal into a digital signal, and to output the digital signal. The cover is used to protect the circuit substrate and to fix the flowmeter at the fixing hole of the lower end body and the upper end body by a screw(62). |
