Multifunctional safe pressure gauge

Abstract

A multifunctional safe pressure gauge comprises a housing and gauge glass. The back part of the inner chamber of the housing is provided with an isolating device, and the front part is provided with a scale indicating device. A dial disc is arranged below the scale indicating device. An instrument elastic element and a movement are arranged below the dial disc. The isolating device is provided with an isolating diaphragm which divides the isolating device into an isolating chamber and a pressure guiding chamber. A tested medium enters the isolating chamber of the gauge. The pressure guiding chamber is filled with pressure guiding liquid. The pressure guiding liquid is isolated from the tested medium by the isolating diaphragm. The pressure guiding liquid enters the instrument elastic element through a damping hole and a pressure guiding hole. The movable end of the instrument elastic element is connected with the movement. The movement shaft of the movement is connected with the scale indicating device. If leakage of components such as the pressure guiding chamber and the damping hole or severe pressure guiding liquid loss occurs, the isolating diaphragm moves and blocks the damping hole so that the isolating diaphragm is prevented from pressurized displacement. When the pressure at the isolating chamber side reduces and is lower than the pressure of the pressure guiding chamber, the isolating diaphragm can perform normal displacement in the direction of the isolating chamber, thereby opening the damping hole.

Description

technical field [0001] The invention relates to the technical field of pressure instruments, in particular to a multifunctional safety pressure gauge. Background technique [0002] Multifunctional safety pressure gauges are widely used in pressure measurement in industries such as petroleum, chemical industry, metallurgy, military industry, aerospace, electric power, coal mine, medicine, printing and dyeing, etc., while the existing pressure gauges only indicate the measured pressure value, without other protection instruments. usage instructions. If the measurement medium requires harsh conditions, an instrument protection device must be added. [0003] The functions of shock resistance, anti-corrosion, and protection level in the prior art are all single functions in the instrument. The damping, overvoltage protection, and isolation diaphragms are all connected to the instrument with additional devices of the instrument. There is no such thing as preventing the leakage of...

AI Technical Summary

Problems solved by technology

[0003] The functions of shock resistance, anti-corrosion, and protection level in the prior art are all single functions in the instrument. The damping, overvoltage protection, and isolation diaphragms are all connected to the instrument with additional devices of the instrument. There is no such thing as preventing the leakage of the measured medium. In the existing technology, it is extremely inconvenient for the user to select the type, or the user selects the wrong type and the instrument fails to cause heavy losses.

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