Pressure gauge capable of widening measurement range

Abstract

The invention discloses a pressure gauge capable of widening a measurement range, and relates to the technical field of physical apparatuses. The pressure gauge comprises a pedestal, a column is fixedly mounted in the left side of the top of the pedestal, a supporting seat is fixedly mounted in the right side of the top of the pedestal, cross bars are fixedly mounted on the right of the column, a U-shaped tube positioned in the top of the supporting seat is fixedly mounted in the sides, far from the column, of the cross bars, a graduated scale is fixedly mounted in the inner side of the U-shaped tube, a bracing frame is fixedly mounted in the top of the column, and a test tube holder positioned over the U-shaped tube is fixedly mounted on the right of the bracing frame. According to the pressure gauge capable of widening the measurement range, the test tube holder is arranged, and fixed over the U-shaped tube via the bracing frame, so that when the measured pressure intensity increase suddenly or increased due to carelessness, a tube can be additionally arranged on the left of the U-shaped tube via the test tube holder and communicated with the U-shaped tube, so that an operating fluid is prevented from being washed away, and the measurement range of the pressure gauge is widened.

Description

technical field [0001] The invention relates to the technical field of physical instruments, in particular to a pressure gauge with the function of increasing the measurement range. Background technique [0002] The pressure gauge is generally a U-shaped tube structure, filled with water or mercury, and uses Pascal's principle to measure pressure. [0003] When using a pressure gauge for experimental testing, the measured pressure cannot exceed the measurement range of the instrument. If the pressure increases due to the sudden increase of the measured object or careless operation, the working fluid will be washed away. If the mercury working fluid is washed away , not only brings losses, but also may cause the risk of mercury poisoning. Therefore, the measuring range of the manometer is limited to a certain extent, and it is not very convenient to measure the pressure. Therefore, a manometer with the function of increasing the measuring range is proposed to solve the above ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a pressure gauge with the function of increasing the measurement range, which has the advantages of increasing the measurement range, etc., and solves the problem that when the pressure gauge is used for experimental testing, the measured pressure cannot exceed the measurement range of the instrument. If the pressure increases due to sudden pressurization of the measured object or careless operation, the working fluid will be washed away. If the mercury working fluid is washed away, it will not only bring losses, but also cause the risk of mercury poisoning. Therefore, the pressure gauge The measurement range is limited, which is not very convenient when measuring pressure

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