CN111879378B

CN111879378B - Method for calculating amount of media injected into standard metal measuring device at different heights

Info

Publication number: CN111879378B
Application number: CN202010720659.XA
Authority: CN
Inventors: 陈国宇; 冯良锋; 陈奕湘; 邹建华; 林建达
Original assignee: GUANGZHOU ENERGY DETECTION RESEARCH INSTITUTE
Current assignee: GUANGZHOU ENERGY DETECTION RESEARCH INSTITUTE
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2022-03-25
Anticipated expiration: 2040-07-24
Also published as: CN111879378A

Abstract

The invention discloses a method for preparing a medicamentThe method for calculating the amount of the medium injected into the standard metal measuring device at the same height comprises the following steps: using 'water' as medium, for nominal capacity Q₀The three-equal standard metal measuring device is calibrated to obtain the liquid level scale h of the three-equal standard metal measuring device corresponding to the nominal capacity₀Measuring the neck indexing volume f; injecting Q at the metering neck position of a three-equal standard metal measuring device₀To be measured and obtain the current liquid level scale h₁(ii) a Injecting Q at the lower cone position of a three-equal standard metal measuring device₀To be measured and obtain the current liquid level scale h₂(ii) a By comparing the nominal capacity Q₀Liquid level scale h of corresponding nominal capacity of standard metal measuring device of III and III₀Liquid level scale h₁And liquid level scale h₂Calculating the unit volume compensation coefficient of the injection port when measuring the neck and the unit volume compensation coefficient of the injection port when the injection port is in the lower cone; the amount of the substance to be metered is required to be injected when the injection port is at the metering neck and when the injection port is at the lower cone, respectively.

Description

Method for calculating amount of media injected into standard metal measuring device at different heights

Technical Field

The invention relates to the technical field of measurement, in particular to a method for calculating the amount of a medium injected into a standard metal measuring device at different heights.

Background

The standard metal measuring device is an instrument for measuring the volume of a fluid substance, and is widely applied to the links of verification of fluid measurement, scientific research, medium proportioning of production links and the like. The capacity calibration of the current standard metal measuring device mainly has the following problems: the medium used for calibration of the capacity of a standard metal gauge is typically water, while the medium actually used is typically oil or other substance. Due to the viscosity and density difference of different substances, the same amount of wall hanging and bubbles in the injection process is different, so that when the medium is injected at different heights, the obtained substance amount cannot reach the expected value, and the subsequent use link of the substance is influenced.

Disclosure of Invention

In order to solve the problem that the capacity of a standard metal measuring device is influenced by injection ports with different heights in the process of calibrating and using the capacity of the standard metal measuring device in the prior art, the invention provides a method for calculating the injection quantity of media into the standard metal measuring device at different heights, which can quickly calculate the injection quantity of the media so as to meet the requirement on a specific quantity of the media.

The purpose of the invention is realized by the following technical scheme:

a method of calculating the amount of media injected into a standard metal gauge at different heights, comprising:

step A takes 'water' as a medium, and the nominal capacity Q is obtained₀The three-equal standard metal measuring device is calibrated to obtain the liquid level scale h of the three-equal standard metal measuring device corresponding to the nominal capacity₀Measuring the neck indexing volume f;

step B, injecting Q into the metering neck position of the three-equal standard metal measuring device₀To be measured and obtain the current liquid level scale h₁；

Step C, injecting Q into the lower cone position of the three-equal-standard metal measuring device₀To be measured and obtain the current liquid level scale h₂；

Step D by comparing the nominal capacity Q₀Liquid level scale h of corresponding nominal capacity of standard metal measuring device of III and III₀Liquid level scale h₁And liquid level scale h₂Calculating the unit volume compensation coefficient of the injection port when measuring the neck and the unit volume compensation coefficient of the injection port when the injection port is in the lower cone;

and E, respectively calculating the amount of the substance to be metered when the injection port is positioned at the metering neck and when the injection port is positioned at the lower cone.

One or more embodiments of the present invention may have the following advantages over the prior art:

the medium quantity of the three-class standard metal measuring device can be rapidly calculated according to the injection ports with different heights, and the accuracy of medium requirements is guaranteed.

Drawings

FIG. 1 is a flow chart of a method for calculating the amount of a medium injected into a standard metal measuring device at injection ports of different heights.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1, a method for calculating the amount of a medium injected into a standard metal measuring device through injection ports with different heights includes:

step 10 takes 'water' as medium, and the nominal capacity Q is obtained₀The three-equal standard metal measuring device is calibrated to obtain the liquid level scale h of the three-equal standard metal measuring device corresponding to the nominal capacity₀Measuring the neck indexing volume f;

step 20 of injecting Q into the metering neck of the three-class standard metal measuring device₀To be measured and obtain the current liquid level scale h₁；

Step 30 of injecting Q into the lower cone position of the three-equal-standard metal measuring device₀To be measured and obtain the current liquid level scale h₂；

Step 40 by comparing the nominal capacity Q₀Liquid level scale h of corresponding nominal capacity of standard metal measuring device of III and III₀Liquid level scale h₁And liquid level scale h₂Calculating a unit volume compensation coefficient of the injection port when the neck is measured and a unit volume compensation coefficient of the injection port when the neck is in a lower cone; wherein:

the unit volume compensation coefficient formula of the injection port when measuring the neck is as follows:

ζ₁＝(h₁-h₀)*f/1000/(Q₀+(h₁-h₀)*f/1000)

the unit volume compensation coefficient formula of the injection port at the lower cone is as follows:

ζ₂＝(h₂-h₀)*f/1000/(Q₀+(h₂-h₀)*f/1000)；

step 50, respectively calculating the amount of the substance to be metered when the injection port is positioned at the metering neck and when the injection port is positioned at the lower cone; the method specifically comprises the following steps: when the sprue is at the metering neck, Q is expected₀When the material to be measured is required to be injected into the three-equal standard metal measuring device, the quantity of the material to be measured is Q₀*(1-ζ₁) (ii) a When the injection port is in the lower cone, Q is expected₀When the material to be measured is required to be injected into the three-equal standard metal measuring device, the quantity of the material to be measured is Q₀*(1-ζ₂)。

Example 1

Using 'water' as medium, for nominal capacity Q₀＝20[L]The three-equal standard metal measuring device is calibrated to obtain the liquid level scale h corresponding to the nominal capacity of the three-equal standard metal measuring device₀＝65.40[mm]The graduated volume of the measuring neck is f ═ 1.87[ mL/mm ]]。

Using oil as medium, injecting Q at the metering neck position of the three-class standard metal measuring device₀＝20[L]The liquid level scale obtained at this time is h₁＝63.44[mm]。

Injecting Q at the lower cone position of a three-equal standard metal measuring device₀＝20[L]The liquid level scale obtained at this time is h₂＝63.58[mm]。

Calculating the compensation coefficient per unit volume of the filling opening at the time of measuring the neck as zeta₁＝-1.50*10^-4The compensation coefficient per unit volume of the injection port at the lower cone is zeta₂＝-1.70*10^-4。

When the injection port is at the metering neck, 20L of oil is expected to be obtained, and the amount of the oil required to be injected into the three-class standard metal measuring device is 20.003L; when the injection port is in the lower cone, 20L of oil is expected, and the amount of oil needed to be injected into the three-class standard metal measuring device is 20.0034L.

The oil is not limited to diesel oil, gasoline, and edible oil, and is applicable to all oils.

Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for calculating the amount of a medium injected into a standard metal gauge at different heights, the method comprising:

step A takes water as a medium, and the nominal capacity Q is adjusted₀The three-equal standard metal measuring device is calibrated to obtain the liquid level scale h of the three-equal standard metal measuring device corresponding to the nominal capacity₀Measuring the neck indexing volume f;

Step D by comparing the nominal capacity Q₀Liquid level scale h of corresponding nominal capacity of standard metal measuring device of III and III₀Metering neck position injection Q₀Liquid level scale h of the substance to be measured₁And lower cone position injection Q₀Liquid level scale h of the substance to be measured₂Calculating a unit volume compensation coefficient of the injection port when the neck is measured and a unit volume compensation coefficient of the injection port when the neck is in a lower cone;

and E, respectively calculating the amount of the substance to be measured which needs to be injected into the three-class standard metal measuring device when the injection port is positioned at the measuring neck and when the injection port is positioned at the lower cone.

2. The method for calculating the amount of a medium injected into a standard metal gauge at different heights according to claim 1, wherein in the step D:

the calculation formula of the unit volume compensation coefficient of the injection port when the neck is measured is as follows:

ζ₁＝(h₁-h₀)*f/1000/(Q₀+(h₁-h₀)*f/1000)

the calculation formula of the unit volume compensation coefficient of the injection port in the lower cone is as follows:

ζ₂＝(h₂-h₀)*f/1000/(Q₀+(h₂-h₀)*f/1000)；

wherein Q is₀For the nominal capacity, h₀Liquid level scale h corresponding to nominal capacity of three-equal standard metal measuring device₁Injecting Q for metering neck position₀Liquid level scale of the substance to be measured, h₂Injecting Q for the lower cone position₀The liquid level scale f when the material to be measured is the neck graduation volume.

3. The method for calculating the amount of a medium injected into a standard metal gauge at different heights according to claim 2, wherein the step E specifically comprises:

when the sprue is at the metering neck, Q is expected₀When the material to be measured is required to be injected into the three-equal standard metal measuring device, the quantity of the material to be measured is Q₀*(1-ζ₁)；

When the injection port is in the lower cone, Q is expected₀When the material to be measured is required to be injected into the three-equal standard metal measuring device, the quantity of the material to be measured is Q₀*(1-ζ₂)。

4. The method for calculating the amount of a medium to be filled into a standard metal measuring vessel at different heights according to claim 1, wherein the substance to be measured is gasoline, diesel oil or edible oil.