Device and method for automatically metering and calibrating horizontal tank capacity based on standard metal tank

Abstract

The invention relates to a device and a method for automatically metering and calibrating horizontal tank capacity based on a standard metal tank. Computer control equipment acquires height of liquid injected into a horizontal tank from the standard metal tank and liquid temperature information in real time, the height of liquid is converted to liquid capacity at standard temperature, and a capacity table corresponding to the measured liquid height of the horizontal tank is calculated. Moreover, a liquid inlet solenoid valve of the standard metal tank can control the liquid inlet flow; when the liquid level is detected to be lower than a certain threshold, a computer controls the liquid inlet valve to open to rapidly inflow the liquid at high flow; and when the liquid level is detected to reach the threshold, high-flow liquid inlet control is closed, and low-flow liquid inlet control is opened to slowly inflow the liquid until the liquid level meets the set liquid level. All components of the metering and calibrating device have explosion-proof function, and meet the explosion-proof requirement on a calibration site. The system for automatically metering the horizontal tank capacity is simple in structure, high in degree of automation, easy to operate and suitable for the horizontal tank on site.

Description

technical field [0001] The invention belongs to the measuring and verifying device and method for horizontal tank capacity in the metering field, in particular to an automatic measuring and verifying device and method for horizontal tank capacity based on a standard metal gauge. Background technique [0002] Horizontal buried oil tanks are often used to store gasoline, diesel, kerosene and other fuels. As a measuring instrument for measuring and storing liquids, they are widely used in various industries, and the most widely used ones are gas stations. As an instrument for measuring and storing liquids in gas stations, the accuracy of horizontal tank capacity measurement directly determines whether energy companies can carry out perfect inventory management and close control of purchase, sale and storage. It is of great practical significance to study its precision measurement devices and methods . [0003] There are mainly two existing methods for horizontal tank capacity ...

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Problems solved by technology

[0010] This method is easy to operate and has a high degree of automation, which can realize the calibration of horizontal tanks in the working state of unclear tanks; but because the uncertainty of the core component flowmeter needs to be improved, this method is difficult to meet the requirements of horizontal tank measurement. The requirement of calibration uncertainty of 0.4% (k=2) is basically only used for internal management of the enterprise, not for custody transfer

[0011] In summary, the above two methods have the disadvantages of high labor intensity, low safety factor, and uncertainty that do not meet the measurement requirements. An automatic horizontal tank capacity measurement verification device and method capable of meeting measurement uncertainty requirements

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