Mechanical pneumatic pressure alarm device

Abstract

The invention discloses a mechanical pneumatic pressure alarm device. The mechanical pneumatic pressure alarm device is connected with and communicates with an air source outlet, and comprises a shellbody, a buzzer assembly, a sealing seat and a valve core; a gas chamber is arranged in the shell body, the upper end of the gas chamber is an open end, the bottom end of the gas chamber is an air inlet end, and the air inlet end is connected with and communicates with the air source outlet; the buzzer assembly is detachably connected with the open end, and is internally provided with a resonancechamber, and the resonance chamber communicates with the gas chamber; the sealing seat is arranged at the bottom of the gas chamber, the outer wall of the sealing seat is connected with the inner wallof the gas chamber in sealed and contact modes, the sealing seat is provided with an air inlet passage penetrating through the upper and lower ends of the sealing seat, and the air inlet passage communicates with the gas chamber; and the valve core are arranged in the air inlet passage and is used for closing and opening the air inlet passage. The device makes use of resonance of gas and the resonance chamber to produce a whistle like alarm sound, thus the size of an alarm structure is greatly reduced, external power supply is not needed, and the device is convenient to integrate into a pneumatic component.

Description

technical field [0001] The present invention relates to the technical field of alarm devices in pneumatic systems, and more specifically relates to a mechanical pneumatic pressure alarm device, which is used for mechanical alarming of pneumatic components / pipelines within a range of pressure. Background technique [0002] Pneumatic systems are widely used due to the advantages of no environmental pollution, low pipeline flow energy loss, and rapid transmission response, but they also have the disadvantages of high sealing requirements and easy leakage. The existing pneumatic system uses a pressure alarm device to convert the pressure into an electrical signal through a pressure relay or a pressure transmitter, and then the microcontroller judges whether a buzzer is required to send out an alarm sound. Therefore, the general pressure alarm device has a large volume and requires external power supply, which is not conducive to integrated design, especially in an environment wi...

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Problems solved by technology

Therefore, the general pressure alarm device is large in size and requires external power supply, which is not conducive to integrated design, especially in the environment without external power supply

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