| 摘要 |
<p>The present invnetion discloses a bidirectional blockage-free gear-driven shutoff valve for gas meter purpose, and belongs to an electromechanical valve for gas meter including an outer housing in which an inner housing (4) is installed; a motor (1), a gear box (2) and a valve rod (3) are installed in the inner housing (4); a ratchet duplex gear and an incomplete gear are also installed in the gear box; the ratchet duplex gear is meshed with driving gear and the incomplete gear respectively; the incomplete gear is configured with a eccentric shaft which inserts into the connecting hole at the end of the valve rod (3); seal ring (5) of a static seal and a reinforcement dynamic seal are utilized for the motor (1), which avoid corrosion of motor coil by natural gas and improve the safety of the electromechanical valve; the ratchet duplex gear is added in the gear box (2) to match locking and unlocking between the incomplete gear and locking piece, and can realize the completely unloading during forward rotation and reverse rotation of the motor (1), and to realize blockage-free when open/close the valve; therefore, it is possible to improve the operational reliability of electromechanical valve, reduce the power consumption of electromechanical valve and increase its service life.</p> |
