Method for calibrating high pressure equipment

Abstract

The invention provides a method for calibrating high pressure equipment, comprising the following steps of: i, calibration of a pressure gauge: closing a valve I, opening a valve II, absorbing water from a water storage tank by means of a pressure hand pump, pressing the water into a pressure pump of a detecting device through a high pressure hose so that a certain value is shown on a bourdon tube pressure gauge on the high pressure equipment, comparing the bourdon tube pressure gauge part of the high pressure equipment through observing a difference between readings of a standard pressure gauge and the bourdon tube pressure gauge on the high pressure equipment, and adjusting an adjusting and a fine adjusting knobs on the pressure pump to meter and detect the bourdon tube pressure gauge of the high pressure equipment; ii, calibration of air tightness: closing the valve I and the valve II, observing the reading of the standard pressure gauge, and observing the reading of the standard pressure gauge again after 10 minutes, wherein the air tightness is in compliance with technical requirements if the two readings are as same as each other. The method is simple to operate, accurate to measure, easy to transmit a measuring value, and solves a calibration difficulty of an oil and water prohibiting pressure gauge.

Description

technical field [0001] The invention relates to the technical field of high-voltage measurement, in particular to a verification method of high-voltage equipment. Background technique [0002] For some special high-pressure equipment with precise and strict pressure control, the accuracy and reliability of pressure gauge measurement is not important. In the past, these high-voltage devices were often sent to the original manufacturer for functional inspection. However, even the functional inspection of the manufacturer only tests the tightness and pressure resistance of the high-pressure equipment, and the metrological verification of the instruction part of the pressure gauge still needs to be carried out by the measuring station. Sending it back to the manufacturer wastes a lot of money and time, and there is no guarantee that its functions and technical indicators will not be affected during long-distance transportation. At the same time, due to the special structure of...

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Problems solved by technology

However, even the functional inspection of the manufacturer is only to test the tightness and pressure resistance of the high-pressure equipment, and the measurement verification of the indication part of the pressure gauge still needs to be carried out by the measurement station

Sending it back to the manufacturer wastes a lot of cost and time, and it cannot be guaranteed that its functions and technical indicators will not be affected during the long-distance transportation back and forth

At the same time, due to the special structure of the elastic tube pressure gauge, when water

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