| 摘要 |
<p>A pipeline inspection apparatus [500, 1500] has a body [1502] configured to fit inside a pipeline [1510]. A flow channel is formed within the body [1502] and includes an inlet [210, 1210], an outlet [230, 1230], and a bypass channel [200, 1200] connecting the inlet [210, 1210] and the outlet [230, 1230], the inlet [210, 1210] being configured to receive a portion of a fluid flowing through the pipeline [1510], and the outlet [230, 1230] being configured such that the fluid flowing through the bypass channel [200, 1200] flows out of the bypass channel [200, 1200] through the outlet [230, 1230]. A flow control valve [300, 1300] is attached to the body [1502] and has a sleeve [ 330, 1330] configured to move to vary a flow rate of the fluid flowing out of the outlet [230, 1230]. A motor [1345] is provided in a chamber in the body [1502] and is configured to move the sleeve [330, 1330]. Alternatively, valves [338, 340] are used to control the sleeve [330, 1330] instead of the motor [1345].</p> |
