CN111207805A - Device and method for detecting liquid quantity of pressure container - Google Patents
Device and method for detecting liquid quantity of pressure container Download PDFInfo
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- CN111207805A CN111207805A CN202010287859.0A CN202010287859A CN111207805A CN 111207805 A CN111207805 A CN 111207805A CN 202010287859 A CN202010287859 A CN 202010287859A CN 111207805 A CN111207805 A CN 111207805A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure
Abstract
The invention relates to a liquid quantity detection device and a liquid quantity detection method for a pressure container, wherein the measuring device comprises a three-way joint, the three-way joint is respectively connected with a first pipeline, a second pipeline and a pressure sensor, a liquid pump is arranged at the end part of the second pipeline, the second pipeline is communicated with one port of the liquid pump, a third pipeline is connected to the other port of the liquid pump, and an automatic measuring cup is arranged at the port of the third pipeline. The measuring method adopts a liquid injection method, firstly measuring the initial pressure value in the pressure container, then injecting a certain volume of liquid into the pressure container, then measuring the pressure value after the liquid is injected into the pressure container, measuring the accurate volume of the liquid injected into the pressure container by using an automatic measuring cup, then calculating the original volume of the liquid in the pressure container according to the measured data and the Boma law, and adjusting the liquid volume in the pressure container on the basis of the volume of the injected liquid. The invention can accurately calculate the volume of the original liquid in the pressure container.
Description
Technical Field
The invention relates to a pressure container measuring technology, in particular to a device and a method for detecting the liquid quantity of a pressure container.
Background
The pressure vessel is a high-pressure vessel filled with liquid and gas, the re-feeding machine is a typical pressure vessel, the re-feeding machine is internally provided with a high-pressure vessel (about 4Mp) for mixing gas and liquid, and only one interface for injecting gas and liquid is also an inspection port for acquiring gas pressure and liquid volume. To know the volume of liquid in a pressure vessel, it can only be determined indirectly by the Boma law.
The Boma law: for a certain amount of gas, its pressure p and volume V are inversely proportional, when the temperature is kept constant, and can be expressed as:
P1*V1=P2*V2
p1 is the pressure of the first state gas (initial pressure) and can be read directly by a pressure sensor
V1 is the first gas volume, V1= V total-V liquid
V total is the total volume of the re-feeding machine and is a known design value, and V liquid is the liquid volume
P2 is the pressure (end pressure) of the second gas, which can be read directly by a pressure sensor
V2 is the second state gas volume, and is usually the gas volume that changes Δ V in the V1 state.
Thus, the following steps are obtained: P1V 1= P2 (V1 + Δ V)
P1V total-V liquid (V2V total-V liquid + Δ V)
Finally obtaining V liquid = V total-delta V P2/(P2-P1)
The liquid amount finally measured by the existing measuring method has certain deviation compared with the actual value, the liquid volume can not be accurately measured, and the liquid can not be accurately added, so that the normal use of the backseat device is influenced.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the liquid quantity of a pressure container, which aim to solve the problem of low precision of the existing measuring method.
The invention is realized by the following steps: the utility model provides a pressure vessel liquid measure detection device, includes three way connection, a port of three way connection is connected with the first pipeline that is used for with the pressure vessel intercommunication, the second port of three way connection is connected with pressure sensor, three port of three way connection is connected with the second pipeline the tip of second pipeline is provided with the liquid pump, the second pipeline with a port of liquid pump is linked together be connected with the third pipeline on another port of liquid pump the port of third pipeline is provided with automatic graduated flask, pressure sensor with automatic graduated flask simultaneously electricity is connected with the host computer.
The automatic measuring cup comprises a cup body, a magnetic scale is arranged on the cup body, a floating ball is arranged at the lower end of a lifting rod of the magnetic scale, the floating ball is located in the cup body, and the lower end of the cup body is communicated with the third pipeline.
The liquid pump is a manual pump which is used for pumping the liquid in the automatic measuring cup into the pressure container and allowing the liquid to reversely flow.
The host is used for displaying data measured by the pressure sensor and the automatic measuring cup and calculating the volume of original liquid in the pressure container.
The invention also discloses a method for detecting the liquid amount of the pressure container, which comprises the following steps:
a. the device for detecting the liquid quantity of the pressure container comprises a three-way joint, wherein one port of the three-way joint is connected with a first pipeline communicated with the pressure container, the second port of the three-way joint is connected with a pressure sensor, the third port of the three-way joint is connected with a second pipeline, a liquid pump is arranged at the end part of the second pipeline, the second pipeline is communicated with one port of the liquid pump, the other port of the liquid pump is connected with a third pipeline, an automatic measuring cup is arranged at the port of the third pipeline, the pressure sensor and the automatic measuring cup are simultaneously electrically connected with a host, the first pipeline is communicated with the pressure container, and liquid for the pressure container is added into the automatic measuring cup.
b. The initial volume V1 of the automatic measuring cup is measured by measuring the initial pressure value P1 of the pressure vessel by means of the pressure sensor.
c. And starting the liquid pump to pump a part of the liquid in the automatic measuring cup out to be filled into the pressure container.
d. And measuring the final pressure value P2 of the pressure container and the final volume V2 of the measuring cup by using a pressure sensor, and calculating the accurate liquid injection quantity delta V from the initial volume V1 and the final volume V2, wherein the delta V = V1-V2.
e. Calculating the volume of the liquid in the pressure container according to the formula Vtotal = Vtotal- Δ Vp 2/(P2-P1), wherein Vtotal is the total volume of the pressure container, and Vliquid is the volume of the liquid in the pressure container.
f. And adjusting the volume of the liquid in the pressure container to ensure that the volume of the liquid in the pressure container meets the standard.
In step f, if the V liquid meets the standard, discharging the Δ V injected into the pressure container, and if the V liquid does not meet the standard, continuing to inject or discharge a part of liquid on the basis of the Δ V.
The automatic measuring cup comprises a cup body, a magnetic scale is arranged on the cup body, a floating ball is arranged at the lower end of a lifting rod of the magnetic scale, the floating ball is located in the cup body, and the lower end of the cup body is communicated with the third pipeline.
The liquid pump is a manual pump which is used for pumping the liquid in the automatic measuring cup into the pressure container and allowing the liquid to reversely flow.
According to the liquid quantity detection device for the pressure container, the liquid pump is used for injecting liquid into the pressure container to enable the liquid quantity in the pressure container to change, the pressure sensor is used for measuring the pressure before and after the liquid in the pressure container changes, the automatic measuring cup is used for accurately measuring the volume of the liquid injected into the pressure container, required data can be rapidly and accurately measured by the liquid quantity detection device, the volume of the original liquid in the pressure container can be accurately calculated according to the measured data and the Boma law, and the liquid can be accurately added and discharged.
The invention relates to a method for detecting the liquid quantity of a pressure container, which is based on a Boma law, adopts a liquid injection method, firstly measures the initial pressure value in the pressure container, then injects a certain volume of liquid into the pressure container, then measures the pressure value after the liquid is injected into the pressure container, measures the accurate volume of the liquid injected into the pressure container by using an automatic measuring cup, then calculates the original volume of the liquid in the pressure container according to the measured data and the Boma law, finally judges whether the original volume of the liquid in the pressure container meets the standard or not, and adjusts the liquid on the basis of the volume of the injected liquid.
Drawings
FIG. 1 is a schematic view of a liquid amount detection apparatus for a pressure vessel according to the present invention.
In the figure: 1. a pressure vessel; 2. a three-way joint; 3. a first pipeline; 4. a second pipeline; 5. a third pipeline; 6. a pressure sensor; 7. a manual pump; 8. an automatic measuring cup; 9. a host; 10. splicing sleeves; 7-1, a stop valve; 7-2, a handle; 8-1, a cup body; 8-2, a magnetic ruler; 8-3, a lifting rod; 8-4 parts of floating ball.
Detailed Description
As shown in fig. 1, the liquid level detection device for a pressure vessel of the present invention includes a three-way joint 2, a first pipeline 3 for communicating with the pressure vessel 1 is connected to one port of the three-way joint 2, a pressure sensor 6 is connected to a second port of the three-way joint 2, a second pipeline 4 is connected to a third port of the three-way joint 2, a liquid pump is disposed at an end of the second pipeline 4, the second pipeline 4 is communicated with one port of the liquid pump, a third pipeline 5 is connected to another port of the liquid pump, an automatic measuring cup 8 is disposed at a port of the third pipeline 5, and a host 9 is electrically connected to both the pressure sensor 6 and the automatic measuring cup 8.
The first pipeline 3, the second pipeline 4 and the third pipeline 5 are all high-pressure pipes, quick joints are installed at the ends of the high-pressure pipes and used for quickly installing and assembling the whole device, and the first pipeline 3 is connected with the pressure container 1 through a connecting pipe 10.
The automatic measuring cup 8 comprises a cup body 8-1, a magnetic scale 8-2 is installed at the upper port of the cup body 8-1, a lifting rod 8-3 penetrates through the magnetic scale 8-2, the lifting rod 8-3 extends into the cup body 8-1, a floating ball 8-4 is installed at the lower end of the lifting rod 8-2 of the magnetic scale 8-2, the floating ball 8-4 is located in the cup body 8-1, and the lower end of the cup body 8-1 is communicated with a third pipeline 5. When the volume of the liquid in the cup body 8-1 changes, the liquid level of the liquid changes up and down, the floating ball 8-4 floats up and down, so that the lifting rod 8-3 is driven to move up and down, when the lifting rod 8-3 is positioned at different positions, the magnetic scale 8-2 generates different signals, and the host machine 9 can know the height of the liquid level and calculate the volume of the liquid in the cup body 8-1 after receiving the signals.
The liquid pump may be a bi-directional pump or a manual pump 7, etc., which should be sufficient to pump the liquid in the automatic measuring cup 8 into the pressure vessel 1 and allow the liquid to flow in the reverse direction. Generally, a manual pump 7 can be adopted, one end of the manual pump 7 is a high-pressure port, the other end of the manual pump 7 is an oil suction port, a stop valve 7-1 is arranged on the manual pump 7, the high-pressure port is communicated with the second pipeline 4, and the oil suction port is communicated with the automatic measuring cup 8 through a third pipeline 5. When the stop valve 7-1 is closed, the manual operation handle 7-2 pumps out the liquid in the automatic measuring cup 8 and outputs the liquid to the pressure container 1 from the high-pressure port. When the shut-off valve 7-1 is opened, the liquid in the pressure vessel 1 flows into the automatic measuring cup 8.
The host machine 9 is used for displaying the data measured by the pressure sensor 6 and the automatic measuring cup 8 and calculating the volume of the original liquid in the pressure container 1. According to the data displayed by the host machine 9, the operation can be conveniently carried out so as to ensure the accuracy of the volume of the liquid in the pressure container 1. The host machine 9 comprises a display, a controller and a power supply, the pressure sensor 6 and the magnetic scale 8-2 are electrically connected with the controller, a calculation program is arranged in the controller, the acquired data are calculated, and the acquired data and the calculation result are displayed on the display.
According to the liquid quantity detection device for the pressure container, the liquid pump is used for injecting liquid into the pressure container 1 to enable the liquid quantity in the pressure container 1 to change, the pressure sensor 6 is used for measuring the pressure before and after the liquid in the pressure container 1 changes, the automatic measuring cup 8 is used for accurately measuring the volume of the liquid injected into the pressure container 1, required data can be rapidly and accurately measured by the liquid quantity detection device, the volume of the original liquid in the pressure container 1 can be accurately calculated according to the measured data and the Boma law, and the liquid can be accurately added and discharged.
The invention discloses a method for detecting the liquid amount of a pressure container, which comprises the following steps:
a. the liquid amount detection device for the pressure container is prepared and comprises a three-way joint 2, one port of the three-way joint 2 is connected with a first pipeline 3 used for being communicated with the pressure container 1, the second port of the three-way joint 2 is connected with a pressure sensor 6, the third port of the three-way joint 2 is connected with a second pipeline 4, a liquid pump is arranged at the end part of the second pipeline 4, the second pipeline 4 is communicated with one port of the liquid pump, the other port of the liquid pump is connected with a third pipeline 5, an automatic measuring cup 8 is arranged at the port of the third pipeline 5, the pressure sensor 6 and the automatic measuring cup 8 are simultaneously and electrically connected with a host computer 9, the first pipeline 3 is communicated with the pressure container 1, sufficient liquid is added into the automatic measuring cup 8, and the liquid is the same as the liquid in the pressure container 1. The automatic measuring cup 8 comprises a cup body 8-1, a magnetic scale 8-2 is arranged on the cup body 8-1, a floating ball 8-4 is arranged at the lower end of a lifting rod 8-3 of the magnetic scale 8-2, the floating ball 8-4 is positioned in the cup body 8-1, and the lower end of the cup body 8-1 is communicated with a third pipeline 5. The liquid pump is a manual pump 7, and the manual pump 7 is used for pumping the liquid in the automatic measuring cup 8 into the pressure container 1 and allowing the liquid to reversely flow.
b. The stop valve 7-1 of the manual pump 7 is closed in the initial state, the liquid in the pressure container 1 cannot freely flow into the automatic measuring cup 8, the pressure in the pressure container 1 is the same as the pressure in the first pipeline 3, the three-way joint 2 and the second pipeline 4, the initial pressure value P1 of the pressure container 1 is measured through the pressure sensor 6, and the initial volume V1 of the liquid in the cup body 8-1 is automatically measured by the automatic measuring cup 8.
c. The liquid pump is activated to draw a portion of the liquid in the automatic measuring cup 8 into the pressure vessel 1. The stop valve 7-1 of the manual pump 7 is opened, the handle 7-2 is pressed, and the liquid in the automatic measuring cup 8 is pumped out and injected into the pressure container 1. The amount of liquid injected into the pressure vessel 1 should not be too large, and is generally about 0.5 liter.
d. The pressure sensor 6 measures the final pressure value P2 of the pressure container 1 and the final volume V2 of the measuring cup, and the accurate liquid injection quantity delta V is calculated from the initial volume V1 and the final volume V2, wherein the delta V = V1-V2.
e. The volume of liquid present in the pressure vessel 1 is calculated according to the formula vtol = vtol- Δ ν × P2/(P2-P1), where vtol is the total volume of the pressure vessel 1 and vdol is the volume of liquid present in the pressure vessel 1.
f. And adjusting the volume of the liquid in the pressure container 1 to make the volume of the liquid in the pressure container 1 meet the standard. If the level of Vliquid has been met, Δ V injected into the pressure vessel 1 is discharged, and if the level of Vliquid has not been met, a part of the liquid is continuously injected or discharged on the basis of Δ V.
The invention relates to a method for detecting the liquid quantity of a pressure container, which is based on the Boma law and adopts a liquid injection method, firstly, an initial pressure value in the pressure container 1 is measured, then, liquid with a certain volume is injected into the pressure container 1, then, the pressure value of the pressure container 1 after the liquid is injected is measured, in addition, the accurate volume of the liquid injected into the pressure container 1 is measured by using an automatic measuring cup 8, then, the original liquid volume of the pressure container 1 can be calculated according to the measured data and the Boma law, and finally, whether the original liquid volume in the pressure container 1 meets the standard or not is judged, and the adjustment is carried out on the basis of the injected liquid volume.
Claims (8)
1. The utility model provides a pressure vessel liquid measure detection device, its characterized in that includes three way connection, a port of three way connection is connected with the first pipeline that is used for with the pressure vessel intercommunication, the second port of three way connection is connected with pressure sensor, three port of three way connection is connected with the second pipeline the tip of second pipeline is provided with the liquid pump, the second pipeline with a port of liquid pump is linked together be connected with the third pipeline on another port of liquid pump the port of third pipeline is provided with automatic graduated flask, pressure sensor with automatic graduated flask is connected with the host computer simultaneously electricity.
2. The apparatus for detecting the amount of liquid in a pressure vessel according to claim 1, wherein the automatic measuring cup comprises a cup body, a magnetic scale is disposed on the cup body, a floating ball is disposed at a lower end of a lifting rod of the magnetic scale, the floating ball is disposed in the cup body, and the lower end of the cup body is communicated with the third pipeline.
3. The apparatus according to claim 1, wherein the liquid pump is a manual pump for pumping the liquid in the automatic measuring cup into the pressure vessel and allowing the liquid to flow in a reverse direction.
4. The apparatus for detecting the amount of liquid in a pressure vessel according to claim 1, wherein the host computer is configured to display data measured by the pressure sensor and the automatic measuring cup, and to calculate the volume of the liquid in the pressure vessel.
5. The method for detecting the liquid amount of the pressure container is characterized by comprising the following steps of:
a. preparing a liquid quantity detection device of a pressure container, which comprises a three-way joint, wherein one port of the three-way joint is connected with a first pipeline communicated with the pressure container, the second port of the three-way joint is connected with a pressure sensor, the third port of the three-way joint is connected with a second pipeline, a liquid pump is arranged at the end part of the second pipeline, the second pipeline is communicated with one port of the liquid pump, the other port of the liquid pump is connected with a third pipeline, an automatic measuring cup is arranged at the port of the third pipeline, the pressure sensor and the automatic measuring cup are simultaneously electrically connected with a host, the first pipeline is communicated with the pressure container, and liquid for the pressure container is added into the automatic measuring cup;
b. measuring an initial pressure value P1 of the pressure container through a pressure sensor, and measuring an initial volume V1 of the automatic measuring cup;
c. starting a liquid pump to pump out a part of the liquid in the automatic measuring cup and injecting the part of the liquid into the pressure container;
d. measuring a final state pressure value P2 of the pressure container and a final state volume V2 of the measuring cup through a pressure sensor, and calculating an accurate liquid injection amount delta V from the initial volume V1 and the final state volume V2, wherein the delta V = V1-V2;
e. calculating the volume of the liquid in the pressure container according to the formula Vtotal = Vtotal- Δ Vp 2/(P2-P1), wherein Vtotal is the total volume of the pressure container, and Vliquid is the volume of the liquid in the pressure container;
f. and adjusting the volume of the liquid in the pressure container to ensure that the volume of the liquid in the pressure container meets the standard.
6. The method for detecting the amount of liquid in a pressure vessel according to claim 5, wherein in step f, Δ V injected into the pressure vessel is discharged if the level of vv has been met, and a part of the liquid is continuously injected or discharged based on Δ V if the level of vv has not been met.
7. The method for detecting the liquid level in a pressure vessel according to claim 5, wherein the automatic measuring cup comprises a cup body, a magnetic scale is arranged on the cup body, a floating ball is arranged at the lower end of a lifting rod of the magnetic scale, the floating ball is positioned in the cup body, and the lower end of the cup body is communicated with the third pipeline.
8. The method for detecting the liquid amount in the pressure vessel according to claim 5, wherein the liquid pump is a manual pump for pumping the liquid in the automatic measuring cup into the pressure vessel and allowing the liquid to flow in the reverse direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287859.0A CN111207805A (en) | 2020-04-14 | 2020-04-14 | Device and method for detecting liquid quantity of pressure container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287859.0A CN111207805A (en) | 2020-04-14 | 2020-04-14 | Device and method for detecting liquid quantity of pressure container |
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| CN111207805A true CN111207805A (en) | 2020-05-29 |
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| CN202010287859.0A Pending CN111207805A (en) | 2020-04-14 | 2020-04-14 | Device and method for detecting liquid quantity of pressure container |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854884A (en) * | 2020-06-23 | 2020-10-30 | 广东电网有限责任公司 | Device and method for measuring oil quantity in transformer conservator |
| CN113483844A (en) * | 2021-06-16 | 2021-10-08 | 东风柳州汽车有限公司 | Urea sensor volume testing device and testing method |
| CN117309091A (en) * | 2023-12-01 | 2023-12-29 | 深圳市恒永达科技股份有限公司 | Liquid suction amount accuracy pressure detection method, system and readable storage medium |
-
2020
- 2020-04-14 CN CN202010287859.0A patent/CN111207805A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854884A (en) * | 2020-06-23 | 2020-10-30 | 广东电网有限责任公司 | Device and method for measuring oil quantity in transformer conservator |
| CN113483844A (en) * | 2021-06-16 | 2021-10-08 | 东风柳州汽车有限公司 | Urea sensor volume testing device and testing method |
| CN113483844B (en) * | 2021-06-16 | 2023-02-24 | 东风柳州汽车有限公司 | Urea sensor volume testing device and testing method |
| CN117309091A (en) * | 2023-12-01 | 2023-12-29 | 深圳市恒永达科技股份有限公司 | Liquid suction amount accuracy pressure detection method, system and readable storage medium |
| CN117309091B (en) * | 2023-12-01 | 2024-03-08 | 深圳市恒永达科技股份有限公司 | Liquid suction amount accuracy pressure detection method, system and readable storage medium |
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