METHOD OF REGULATING GAS FLOW IN REDUCER Russian patent published in 2015 - IPC G01L1/00 

FIELD: rescue equipment.

SUBSTANCE: invention relates to reducers of breathing apparatus. The reducer has a housing and three chamber made in it separated by the walls: high-pressure chamber (HPC) and the reduced pressure chamber (RPC), separated by the first wall, the control chamber (CC) separated with the second wall from the RPC; the seat with a hole in the first wall; the partition with a movable plunger and a valve located in the RPC, separating the CC to piston and annular cavities; first channel connecting the RPC with piston cavity of the CC; the second channel connecting the annular cavity of the CC with the environment, the third channel with a throttle, which connects the RPC with the annular cavity of the CC, a check valve connected to the second channel. The method of regulating the gas flow in the reducer comprises supplying gas to the HPC, displacement of the plunger with the valve and forming a gap between the seat and the valve; entering the gas flow from the HPC and the RPC, accordingly, to the gas consumer; entering the gas flow from the RPC to the CC through the first channel; moving the partition with the plunger and the valve under the action of the gas pressure difference on them, changing the gap between the seat and the sealing element of the valve; flowing of gas from the HPC through the third channel with a throttle in the annular cavity of the CC, moving the partition with the plunger and the valve, and changing the gap between the valve and the seat, regulation of supply and pressure of the gas entering the RPC and the consumer.

EFFECT: providing regulation of a gas flow in the reducer with the given value of the reduced pressure of gas at small amplitude of the pressure oscillations.

8 cl, 3 dwg