CN106643962A - Method for accurately calculating capacity of liquid in irregular tank - Google Patents

Abstract

A method for accurately calculating the liquid capacity in an irregular tank. The inner cavity of the tank is composed of a lower spherical crown cavity and an upper cylindrical cavity. A pipeline is connected to the center of the bottom of the tank, and a valve is arranged on the pipeline adjacent to the tank. , including the following steps: determine the relationship between the volume of each height point in the tank and the height H of each measurement, set the total capacity of the liquid to be measured as V, divide the tank cavity into 5 sections from bottom to top, and divide the volume of each section from top to bottom The volumes are V ₁ , V ₂ , V ₃ , V ₄ and V ₅ respectively; the highest liquid heights of V ₁ , V ₂ , V ₃ , V ₄ and V ₅ correspond to H ₁ , H ₂ , H ₃ , H ₄ and H ₅ ; then according to the different heights of the liquid level, different formulas are used for calculation. The invention can accurately calculate the capacity of the liquid in the container through accurate calculation and repeated experiment verification. The invention divides the inside of the irregular heating kettle into sections from bottom to top, accurately calculates the volume of each section, and then calculates the liquid volume according to the position of the liquid surface.

Description

A Method for Accurately Calculating Liquid Capacity in Irregular Tanks

technical field

The invention belongs to the technical field of production and application of heating tanks, in particular to a method for accurately calculating the liquid capacity in irregular tanks.

Background technique

In the heating process of traditional heating kettles, since the heating medium is high-temperature steam, after the heating is completed and the steam is released, the heating medium will not affect the weight of the entire heating system. Therefore, most traditional heating kettles use real-time weighing methods to display heating The capacity of the heated liquid in the kettle. During the heating process of the low-temperature heating kettle, the heating medium is demineralized water, and the demineralized water circulates in the interlayer of the heating kettle throughout the heating and heat preservation process, so the weight of the heating kettle is greatly affected by the heating medium, and the weighing method cannot be used. Displays the capacity of the heated liquid inside the heating kettle. Using an ultrasonic liquid level gauge can measure the height of the liquid level in real time, but for irregular tanks, such as the bottom of the tank in the shape of a spherical crown, this monitoring of the liquid level cannot accurately determine the real-time capacity of the liquid in the heating tank. Therefore, the market There is an urgent need for a set of accurate calculation methods to calculate and display the real-time capacity of the liquid in the irregular heating tank.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides a method for accurately calculating the liquid capacity in irregular tanks which is convenient for operation, segmented and superimposed, and has versatility.

In order to solve the above technical problems, the present invention adopts the following technical solution: a method for accurately calculating the liquid capacity in an irregular tank, the inner cavity of the tank is composed of a lower spherical crown cavity and an upper cylindrical cavity, and the center of the bottom of the tank body A pipeline is connected, and a valve is arranged on the pipeline adjacent to the tank body, including the following steps:

(1) Determine the relationship between the volume of each height point in the tank and the height H of each measurement, set the total capacity of the measured liquid as V, divide the tank cavity into 5 sections from bottom to top, and the volume of each section from top to bottom is respectively V ₁ , V ₂ , V ₃ , V ₄ and V ₅ ; the highest liquid heights of V ₁ , V ₂ , V ₃ , V ₄ and V ₅ correspond to H ₁ , H ₂ , H ₃ , H ₄ and _H5 ;

(2) The first stage of calculation: set the upper and lower material level tuning fork liquid level gauge on the side of the tank body, set up the ultrasonic liquid level gauge on the top of the tank body, from the liquid level displayed by the tuning fork liquid level gauge to the detection of the tank body by the ultrasonic liquid level gauge There is data at the lowest point of the lower spherical cavity, record it at this time ; That is, the liquid storage capacity between the pipeline connected to the tank and the valve;

(3) The second stage of calculation: the ultrasonic liquid level gauge detects the height H for the second time, and the uniform part radius of the spherical crown cavity with a height of 0 < H ≤ H ₁ is R ₁ , and R ₁ is equal to the actual measurement when the height of the liquid level is H ₁ Divide the liquid surface diameter D ₁ by 2, then the volume V=V ₀ +V ₁ , where , N is a constant duty cycle, the relationship between R and the measured liquid level height H is ;

(4) The third stage of calculation: the ultrasonic liquid level gauge detects the height H for the third time, and the radius of the uniform part of the spherical crown cavity with the height of H ₁ < H ≤ H ₂ is R ₂ , and the height of R ₂ equal to the liquid level is H ₂ When the measured liquid surface diameter D ₂ is divided by 2, the volume at this time is V=V ₀ +V ₁ +V ₂ , where , the relationship between R and the measured liquid level height H is: ;

(5) Calculation in the fourth stage: the ultrasonic liquid level gauge detects the height H for the fourth time, and the radius of the uniform part of the spherical crown cavity with the height of H ₂ < H ≤ H ₃ is R ₃ , and R ₃ is equal to the liquid level when the height is H ₃ The measured liquid surface diameter D ₃ is divided by 2, and the volume at this time is V=V ₀ +V ₁ +V ₂ +V ₃ , where , the relationship between R and the measured liquid level height H is: ;

(6) The fifth stage calculation: the ultrasonic liquid level gauge detects the height H for the fifth time, and the radius of the uniform part of the spherical crown cavity with the height of H ₃ < H ≤ H ₄ is R ₄ , and R ₄ is equal to the liquid level when the height is H ₄ The measured liquid surface diameter D ₄ is divided by 2, and the volume at this time is V=V ₀ +V ₁ +V ₂ +V ₃ +V ₄ , where , the relationship between R and the measured liquid level height H is: ;

(7) Calculation of the sixth stage: the ultrasonic level gauge detects the height H for the sixth time, H ₄ <H<H ₅ , and R ₅ is the radius _{of the cylindrical cavity of the tank body, and} the volume at this time is V=V ₀ +V ₁ +V ₂ +V ₃ +V ₄ +V ₅ , where .

By adopting the above technical solution, the present invention can accurately calculate the capacity of the liquid in the container through accurate calculation and repeated experiment verification. The tank structure of the low-temperature heating kettle is used to heat the liquid. During the heating process of the low-temperature heating kettle, the heating medium is softened water, and the softened water always circulates in the interlayer of the heating kettle during the entire heating and heat preservation process. During the use of the low-temperature heating kettle, the change of the liquid volume is monitored by continuously measuring the change of the liquid level height H.

The present invention is characterized in that the interior of the irregular heating tank is divided into sections from bottom to top, the volume of each section is accurately calculated, and then the liquid volume is calculated according to the position of the liquid surface.

Description of drawings

Fig. 1 is a schematic diagram of the principle of segmented volume calculation in the present invention.

detailed description

As shown in Figure 1, a method for accurately calculating the liquid capacity in an irregular tank according to the present invention, the inner cavity of the tank body 1 is composed of a lower spherical crown cavity 4 and an upper cylindrical cavity 5, and the center of the bottom of the tank body 1 is connected with a pipeline 2, and the pipeline 2 is provided with a valve 3 adjacent to the tank body 1, including the following steps:

(1) Determine the relationship between the volume of each height point in the tank and the height H of each measurement, set the total capacity of the measured liquid as V, divide the tank cavity into 5 sections from bottom to top, and the volume of each section from top to bottom is respectively V ₁ , V ₂ , V ₃ , V ₄ and V ₅ ; the highest liquid heights of V ₁ , V ₂ , V ₃ , V ₄ and V ₅ correspond to H ₁ , H ₂ , H ₃ , H ₄ and _H5 ;

(2) The first stage of calculation: set the upper and lower material level tuning fork liquid level gauge on the side of the tank body, set up the ultrasonic liquid level gauge on the top of the tank body, from the liquid level displayed by the tuning fork liquid level gauge to the detection of the tank body by the ultrasonic liquid level gauge There is data at the lowest point of the lower spherical cavity, record it at this time ; That is, the liquid storage capacity between the pipeline connected to the tank and the valve;

(3) The second stage of calculation: the ultrasonic liquid level gauge detects the height H for the second time, and the uniform part radius of the spherical crown cavity with a height of 0 < H ≤ H ₁ is R ₁ , and R ₁ is equal to the actual measurement when the height of the liquid level is H ₁ Divide the liquid surface diameter D ₁ by 2, then the volume V=V ₀ +V ₁ , where , N is a constant duty cycle, the relationship between R and the measured liquid level height H is ;

(4) The third stage of calculation: the ultrasonic liquid level gauge detects the height H for the third time, and the radius of the uniform part of the spherical crown cavity with the height of H ₁ < H ≤ H ₂ is R ₂ , and the height of R ₂ equal to the liquid level is H ₂ When the measured liquid surface diameter D ₂ is divided by 2, the volume at this time is V=V ₀ +V ₁ +V ₂ , where , the relationship between R and the measured liquid level height H is: ;

(5) Calculation of the fourth stage: the ultrasonic liquid level gauge detects the height H for the fourth time, and the radius of the uniform part of the spherical crown cavity with the height of H ₂ < H ≤ H ₃ is R ₃ , and R ₃ is equal to the liquid level when the height is H ₃ The measured liquid surface diameter D ₃ is divided by 2, and the volume at this time is V=V ₀ +V ₁ +V ₂ +V ₃ , where , the relationship between R and the measured liquid level height H is: ;

(6) The fifth stage calculation: the ultrasonic liquid level gauge detects the height H for the fifth time, and the radius of the uniform part of the spherical crown cavity with the height of H ₃ < H ≤ H ₄ is R ₄ , and R ₄ is equal to the liquid level when the height is H ₄ The measured liquid surface diameter D ₄ is divided by 2, and the volume at this time is V=V ₀ +V ₁ +V ₂ +V ₃ +V ₄ , where , the relationship between R and the measured liquid level height H is: ;

(7) Calculation of the sixth stage: the ultrasonic level gauge detects the height H for the sixth time, H ₄ <H<H ₅ , R ₅ is the radius _{of the cylinder cavity of the tank body, and} the volume at this time is V=V ₀ +V ₁ +V ₂ +V ₃ +V ₄ +V ₅ , where .

After several tests in the test phase, the following are some typical experimental data extracted from the test phase to test the accuracy of the data. (Note: In order to accurately measure the real volume of the feed liquid, the feed liquid is replaced by water. By emptying the tank 1, use an electronic scale to weigh the weight of the water to convert the volume of the feed liquid.) The measurement schedule is as follows:

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention belong to the protection of the technical solution of the present invention. scope.

Claims (1)

1. a kind of accurate method for calculating liquid capacity in irregular tank body, described tank inner chamber is by the spherical crown chamber of bottom and upper The cylindrical cavity composition in portion, tank base center is connected with pipeline, and valve is provided with neighbouring tank body on pipeline, it is characterised in that： Comprise the following steps：

（1）Determine the relation of each height point volume and each measurement height H in tank body, the total capacity of setting measurement liquid is V, will Tank inner chamber is bottom-up to be divided into 5 sections, and from top to bottom each section of volume is respectively V₁ 、V₂、V₃、V₄And V₅；V₁ 、V₂、V₃、V₄And V₅ Highest liquid level correspondence be respectively H₁ 、H₂、H₃、H₄And H₅；

（2）First stage calculates：Upper and lower material position tuning fork liquid level gauge is set in tank body sidepiece, supersonic liquid level is set at the top of tank body Meter, showing liquid level from tuning fork liquid level gauge and detecting tank body lower part spherical crown chamber minimum point to ultrasonic level gage has data, now Record；I.e. tank body is connected pipeline to valve intermediate storage liquid capacity；

（3）Second stage is calculated：Ultrasonic level gage detects for the second time height H, and 0< H ≤H₁ The spherical crown chamber of height it is equal Even partial radius are R₁, R₁It is H equal to liquid level₁When survey liquid level diameter D₁Divided by 2, now volume V=V₀+V₁, wherein, N is that the relation of constant dutycycle, R and actual measurement liquid level H is；

（4）3rd section of rank calculates：Ultrasonic level gage third time detects height H, H₁<H≤H₂The uniform portion in the spherical crown chamber of height Radius is divided to be R₂, R₂It is H equal to liquid level₂When survey liquid level diameter D₂Divided by 2, now volume V=V₀+V₁+V₂, wherein, R and actual measurement liquid level H relation be：；

（5）Fourth stage is calculated：Ultrasonic level gage detects height H, H the 4th time₂<H≤H₃The uniform parts in the spherical crown chamber of height Radius is R₃, R₃It is H equal to liquid level₃When survey liquid level diameter D₃Divided by 2, now volume V=V₀+V₁+V₂+V₃, wherein, R and actual measurement liquid level H relation be：；

（6）5th stage calculated：Ultrasonic level gage detects height H, H the 5th time₃<H≤H₄The uniform portion in the spherical crown chamber of height Radius is divided to be R₄, R₄It is H equal to liquid level₄When survey liquid level diameter D₄Divided by 2, now volume V=V₀+V₁+V₂+V₃+V₄, wherein, R and actual measurement liquid level H relation be：；

（7）The calculating of the 6th rank：Ultrasonic level gage detects height H, H the 6th time₄<H<H₅, R₅It is the circle half of tank body cylindrical cavity Footpath_,Now volume V=V₀+V₁+V₂+V₃+V₄+V₅, wherein。