LIMIT LEVEL ALARM WITH POSSIBILITY OF CONTROL OF CIRCUIT INTEGRITY Russian patent published in 2022 - IPC G01F23/74 B65D90/26 G05D9/12 

FIELD: oil industry.

SUBSTANCE: invention relates to provision of safe operation of reservoirs on storage depots and other objects, allowing for elimination of filling or emptying of a reservoir above/below a set value of a liquid level. An alarm consists of a flange with a pipe attached to it, at an upper end of which a floater with an annular magnet is located. A range of floater movement is determined using limiting rings. Inside the pipe, at a level of maximum floater lift, an upper reed switch board is placed. In a lower part of the pipe of non-magnetic material, a movable holder with a magnet is placed, combined with a spring mechanism, to which a buoy is suspended using a cable. In the pipe, at a level of a compressed spring, a lower reed switch board is placed, a level of reed switch trigger is adjusted by changing a length of the cable. The structure is made with the possibility of additional adjustment of the trigger level, using a node for adjustment of the trigger level, without dismounting the limit level alarm.

EFFECT: creation of an alarm controlling upper and lower level of a product, providing signaling on a normal value of a liquid level in a reservoir or an emergency situation, controlling the integrity of signal circuits, and providing disconnection of a pump.

1 cl, 5 dwg, 7 tbl