| 摘要 |
<p>An apparatus [500] configured for travelling inside a pipeline [1510]. The apparatus comprises a body [1502] configured to fit inside the pipeline [1510]. The apparatus also has a flow channel including an inlet [210], an outlet [230], and a bypass channel [200] connecting the inlet [210] and the outlet [230], the inlet [210] being configured to receive a portion of a fluid flowing through the pipeline [1510], and the outlet [230] being configured such that the fluid flowing through the bypass channel [200] flows out of the flow channel through the outlet [230]. The apparatus further comprises a flow control valve [300] attached to the body [1502] and including a sleeve [330] configured to move to vary a flow rate of the fluid flowing out of the outlet [230];. A conduit [332] connects between the flow control valve [300] and a back face of the body [1502] and is configured to communicate a high pressure of the fluid to the flow control valve [300].</p> |
