Air respirator air pressure monitoring alarm whistle with constant pressure function

Abstract

The utility model relates to an alarm device, and specifically to an air respirator air pressure monitoring alarm whistle with a constant pressure function. It comprises a seat body, the cavity of the seat body is connected to the air path of the respirator through a connecting pipe; an air needle is arranged in the seat body, a through air passage is opened along the axis of the air needle, the seat mouth of the seat body is connected to the whistle body through a thread, a plug is arranged at the end of the connection end between the whistle body and the seat body, a blowing air passage which is not coaxial with the air passage is opened on the plug, a compression spring in the seat body generates a thrust to the air needle away from the whistle body, a through threaded hole is opened on the side wall at the bottom of the seat mouth of the seat body, a limit screw is screwed in the threaded hole, the end of the limit screw is placed in the seat mouth, and the screwing depth of the whistle body can be limited, and the depth is the depth of the pressure to open the alarm, so there is no need to adjust the pressure by adjusting the depth of the whistle body, which simplifies the operation process.

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