Pressure sensor sealing pressure stabilizing structure

Abstract

The invention discloses a pressure sensor sealing and pressure stabilizing structure which comprises a sealed mounting cavity, a diaphragm type pressure sensor is arranged in the mounting cavity, twopressure leading pipes are led out of the diaphragm type pressure sensor, the inner ends of the two pressure leading pipes are communicated with the interior of the diaphragm type pressure sensor, theouter ends of the two pressure leading pipes extend out of the installation cavity, the installation cavity is filled with a pressure transmission medium, and the pressure transmission medium is liquid. Compared with the prior art, when the internal pressure of the diaphragm type pressure sensor is too large, the diaphragm type pressure sensor has an outward separation trend, and a liquid pressure transmission medium in the mounting cavity is not easy to compress, so that the separation trend of the diaphragm type pressure sensor can be prevented to a certain extent, and the diaphragm type pressure sensor is prevented from cracking too fast.

Description

technical field [0001] The invention relates to a pressure measuring device, in particular to a pressure sensor sealing and stabilizing structure. Background technique [0002] The core detection component of the capacitive differential pressure transmitter is the diaphragm capacitive differential pressure sensor (diaphragm pressure sensor), which converts two different external pressure signals into corresponding capacitance changes, and the rear detection circuit converts the capacitance The change of the electrical signal is converted into an electrical signal, and the differential pressure value of the applied pressure can be obtained by processing and detecting the electrical signal. [0003] Diaphragm pressure sensor consists of two disc-shaped membrane seats, the edges of the two membrane seats are welded, a diaphragm deformation cavity is arranged between the two diaphragm seats, and a measuring diaphragm is arranged between the two diaphragm seats , the two diaphra...

AI Technical Summary

Problems solved by technology

[0005] 1. In the post-assembly process, the isolation diaphragm and / or welding ring is in contact with the assembly part. Affected by the clamping stress, the isolation diaphragm is prone to deformation, thereby promoting the flow of internal silicone oil, so that the measuring diaphragm of each transmitter The initial position of the chip changes in different situations, which affects the measurement accuracy;

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