| 摘要 |
The invention relates to civil engineering. The technical result is broadening of the range of means for taking readings of the water meter to include a water-meter counting unit and a water-meter electric circuit that allow connection of the water meter to a remote electronic system with monitoring of the pulse line state, including the possibility of signalling of an external magnetic action. The water-meter counting unit retains mechanical counting means with visual indication of consumption readings. The unit comprises a body 1 of a non-magnetic material, a mechanical digital counting device 2 mounted in the body and having kinematically linked wheels 3 arranged on the same axle and bearing digits on their side surfaces for indication of consumption value, a magnetic counting unit half-coupling 4 mounted with the possibility of rotation and magnetic interaction with a mating half-coupling of the support body of the water meter, the named mating half-coupling being kinematically linked to an impeller arranged in the feed-through channel of the named body to be rotated in the running water flow, a reduction gear 7 kinematically linking the magnetic half-coupling 4 of the counting unit to a driving gear 8 of the mechanical digital counting device 2, a permanent magnet 9 fixed eccentrically on the driving gear 8. The electric circuit of the water meter comprises a counting normally open sealed switch 10 mounted in the body with the possibility of periodical magnetic interaction with the permanent magnet 8, and at least one couple of connected in series a normally open sealed switch 15 signalling of a magnetic impact, and a magnetic impact load resistor which, as well as the normally open sealed switch 10, are connected to terminals of the electric circuit. The sealed switch 15 is located inaccessibly for the magnetic field of the permanent magnet 8 so that it cannot operate under its action. |
