| 摘要 |
<p>The invention discloses a fluid control valve for pig, including a main valve (1) and operating means. The main valve comprises a valve body (2) communicated to a fluid pipe (3), a main valve core movably disposed in the inner chamber of the valve body, and a main valve stem (5) connected to the main valve core. The operating means includes a hydrocylinder (6), which comprises a piston (7) disposed in the cylinder, and a piston rod (8) connected to the piston, and wherein the piston rod being transmissibly connected with the main valve stem (5), so as to drive the main valve core to move by the main valve stem; a valve device including a pilot valve (11, 56) positioned in the pipeline which communicates the fluid pipe with the hydrocylinder; and an operator for controlling the actuation of the pilot valve, so as to enable the piston to move reciprocally by the pressure of fluid in the fluid pipe (3).</p> |
