Natural ventilation pressure measuring instrument

Abstract

The invention relates to an independent cavity natural ventilation pressure measuring instrument. The independent cavity natural ventilation pressure measuring instrument includes a base, a lantern ring, a tube, a lead wire, and a wire outlet aviation plug; the base is internally provided with an oil charging pipeline; the right side of the base is provided with the tube, and the base is connected to the tube by the lantern ring; a sensor is arranged within the lantern ring; an oil charging cavity is arranged between the sensor and the base; the rear side of the sensor is provided with a circuit board, and the oil charging cavity passes through the sensor, and then is connected to the circuit board; the outer edge of the circuit board is provided with sealing insulation paste; one end of the lead wire is connected to the circuit board, and the other end of the lead wire is connected to the wire outlet aviation plug. According to the invention, secondary pollution of measuring media can be avoided by adoption of an independent ventilation cavity, and washing and cleaning of a sanitary occasion can be assured by adoption of a primary oil charging structure; an external ventilation structure of the sensor, and a two-channel ventilation design of a polymer ventilation plug and a polymer ventilation film can assure natural ventilation and can effectively prevent moisture condensation and moisture leakage; the influence of moisture on the performances of the natural ventilation pressure measuring instrument can be avoided by adoption of a ventilation and circuit board isolation design; a whole sealing structure within the circuit board can assure a long and reliable operation of the circuit board, and the natural ventilation pressure measuring instrument is suitable for operations in various environments.

Description

technical field [0001] The invention relates to the technical field of a pressure sensor used in the food and pharmaceutical industries, in particular to a pressure measuring instrument with independent cavity natural ventilation used when CIP cleaning, high-temperature sterilization, external high-pressure water cleaning and other operations are required. Background technique [0002] Pressure measuring instrument, also known as pressure sensor, is the most commonly used sensor in industrial practice and instrumentation control. It is widely used in various industrial automatic control environments, involving aerospace, military industry, water conservancy transportation, factory automation, industrial process automation, intelligent equipment and many other industries. [0003] The pressure measuring instruments currently used in the market have the following defects: 1. The electronic circuit cavity is connected to the sensor vent cavity. Once the sensor diaphragm is da...

AI Technical Summary

Problems solved by technology

[0003] The pressure measuring instruments currently used in the market have the following defects: 1. The electronic circuit cavity is connected to the sensor vent cavity. Once the sensor diaphragm is damaged, the measurement medium will be polluted by the electronic circuit cavity, which may cause serious food or drug safety. ACCIDENT

2. Secondary oil-filled structure, the exposed oil-filled hole is easy to hide dirt after long-term use, which is not conducive to cleaning

4. The potted silica gel is easy to cause the blockage of the ventilation pipe and affect the accuracy of the measuring instrument

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