Pressure sensor/converter for converting force to pressure

Abstract

A pressure sensor / transducer for transforming pressure to force contains force sensor and connecting element assembled by connecting module. Its technical features are: stressed block of connecting element is assembled on force sensor. Upper stress bar connecting with stressed block is jointed with lower vector bar by connecting hard-core and does advance and return movement along the internal cavity, which holds the two bars. Compressed aneroid of connecting element is fixed in adapting flange. Pressed body connecting the bottom end of lower vector bar is packaged in compressed aneroid by at least one corrugated diaphragm. It has more rational structural design and takes full advantages of sensor characteristics including simple construction, low cost and high precision etc. It can transform pressure to force in cooperation with connecting element, use force sensor with one measuring range to measure pressure with multi-range and complete measurement of plus-minus pressure under both high and low temperature, which reduce cost, improve measuring precision and extend application range greatly.

Description

technical field [0001] The invention relates to a device for measuring pressure with a force sensor, in particular to a pressure sensor / transmitter for measuring the positive and negative pressure of high and low temperature media and converting the pressure into force. Viscous media such as asphalt and tar can also be measured. Background technique [0002] At present, pressure / differential pressure sensors (transmitters) have been widely used in power stations, petrochemicals, metallurgy, papermaking, textiles, water conservancy, pharmaceuticals and other industries. In the pressure measurement, it is generally used to fill the isolation medium, such as silicone oil, to isolate and measure the pressure of the liquid and gas medium. The medium that can be filled is limited, and the applicable range of temperature is limited. For example, the flash point of silicone oil is about 250°C (atmospheric pressure), and mercury, which has the highest temperature resistance, change...

AI Technical Summary

Problems solved by technology

Substances used as isolation media are greatly affected by temperature. For sensors / transmitters, they cannot be used above 356°C and below -60°C, and the scope of application is limited.

[0004] The present inventor has designed a "remote transmission high temperature resistant pressure / differential pressure sensor" (announcement No. For CN1296687C), the sensor / transmitter for measuring high-temperature pressure and differential pressure is measured by adopting the isolation diaphragm to push the vector rod and then driving the isolation diaphragm filled with isolation medium, which overcomes the existence of high-temperature medium measurement in the prior art Defects

However, in actual use, it is found that the device still has some unsatisfactory aspects, such as the production is more troublesome, the isolation medium is still affected by the temperature, and the production cost is relatively high.

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