CN115184210A - Automatic pressurization calibration device and method for online vibrating tube liquid densimeter - Google Patents
Automatic pressurization calibration device and method for online vibrating tube liquid densimeter Download PDFInfo
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- CN115184210A CN115184210A CN202211094632.XA CN202211094632A CN115184210A CN 115184210 A CN115184210 A CN 115184210A CN 202211094632 A CN202211094632 A CN 202211094632A CN 115184210 A CN115184210 A CN 115184210A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
- G01N2009/006—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis vibrating tube, tuning fork
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Abstract
The invention discloses an automatic pressurization calibration device and method for an online vibrating tube liquid densimeter, which comprises a normal-pressure circulating pipeline and a pressurization circulating pipeline; the normal-pressure circulating pipeline comprises a liquid circulating pump, the input end of the liquid circulating pump is connected with the constant-temperature tank through a pipeline, the output end of the liquid circulating pump is connected with the input end of the on-line vibrating tube liquid densimeter through a pipeline, and the output end of the on-line vibrating tube liquid densimeter is connected with the constant-temperature tank through a pipeline; the pressurizing circulation pipeline comprises a booster pump, the input end of the booster pump is connected with the constant temperature tank through a pipeline, and the output end of the booster pump is connected with the input end of the online vibrating tube liquid densimeter through a pipeline. The invention utilizes the hydraulic automatic pressurization technology, eliminates the operation error caused by manual pressurization during general verification and calibration, and improves the accuracy of the device; the invention has simple operation and strong practicability, can realize the automation of verification and calibration, and greatly improves the working efficiency of verification personnel.
Description
Technical Field
The invention relates to the technical field of online vibrating tube liquid densimeters, in particular to an automatic pressurization calibration device and method of an online vibrating tube liquid densimeter.
Background
The on-line vibrating tube liquid densimeter has the advantages of accuracy, convenience, safety and the like, is widely applied to dynamic metering of various large oil depots and quantitative loading automation, has a non-negligible status in the field of densimeter measurement, and therefore is necessary to carry out metrological verification and calibration according to the national verification regulations.
Pressure verification and calibration of an in-line vibrating tube fluid densitometer is a complex task. At present, the pressure verification and calibration method of the online vibrating tube liquid densimeter mainly adopts a manual pressurization mode, so that verification personnel has large workload, low efficiency and easy error occurrence. There is a need for automation of pressure verification and calibration of an in-line vibrating tube liquid densitometer.
Disclosure of Invention
In view of the above technical problems in the related art, the present invention provides an automatic pressurization calibration device and method for an online vibrating tube liquid densitometer, which can solve the above problems.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
an automatic pressurization calibration device of an online vibrating tube liquid densimeter comprises a normal pressure circulation pipeline and a pressurization circulation pipeline; the constant-pressure circulating pipeline comprises a liquid circulating pump, the input end of the liquid circulating pump is connected with the constant-temperature tank through a pipeline, the output end of the liquid circulating pump is connected with the input end of the on-line vibrating tube liquid densimeter through a pipeline, and the output end of the on-line vibrating tube liquid densimeter is connected with the constant-temperature tank through a pipeline; the pressurizing circulation pipeline comprises a pressurizing pump, the input end of the pressurizing pump is connected with the constant temperature tank through a pipeline, the output end of the pressurizing pump is connected with the input end of the online vibrating tube liquid densimeter through a pipeline, and a pilot type pressure regulating valve is arranged on a connecting pipeline between the pressurizing pump and the online vibrating tube liquid densimeter.
Furthermore, the output end of the liquid circulating pump is provided with a first normally closed switch.
Furthermore, the input of online vibrating tube hydrodensimeter is equipped with temperature sensor, the output of online vibrating tube hydrodensimeter is equipped with normally open switch.
Furthermore, a normally closed switch II is arranged on a pipeline between the booster pump and the pilot type pressure regulating valve, and a pressure switch and an analog signal pressure sensor are arranged on a pipeline between the pilot type pressure regulating valve and the input end of the on-line vibrating tube liquid densimeter.
Furthermore, the output end of the booster pump is provided with an overflow valve, and the output end of the overflow valve is connected with the thermostatic bath through a pipeline.
Furthermore, one end of the pilot-operated pressure regulating valve is connected with the output end of the overflow valve through a pipeline, and the output end of the overflow valve is provided with a normally closed switch III.
A calibration method of an automatic pressurization calibration device of an online vibrating tube liquid densitometer comprises the following steps:
s1, cleaning the online vibrating tube liquid densimeter and drying;
s2, closing the normal-pressure circulating pipeline, and opening the booster pump to pressurize the whole pressurizing circulating pipeline;
s3, closing a valve of the pressurization system and then closing the booster pump when the pressurization reaches a certain value;
s4, adjusting the working pressure of the online vibrating tube liquid densimeter through the pilot type pressure regulating valve, and respectively acquiring vibration period signals of the online vibrating tube liquid densimeter at different pressure points through a computer;
and S5, after the acquisition is finished, processing and storing the acquired data through a computer, and fitting the pressure coefficient of the online vibrating tube liquid densimeter.
The invention has the beneficial effects that: the invention utilizes the hydraulic automatic pressurization technology, eliminates the operation error caused by manual pressurization during general verification and calibration, and improves the accuracy of the device; the invention has simple operation and strong practicability, can realize the automation of verification and calibration, and greatly improves the working efficiency of verification personnel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
The invention is explained in further detail below with reference to the drawing.
FIG. 1 is a simplified structural diagram of an automatic pressurization calibration device for an online vibrating tube liquid densitometer according to an embodiment of the present invention.
In the figure:
1. vibrating a tube densitometer on-line; 2. a liquid circulation pump; 3. a booster pump; 4. a thermostatic bath; 5. a pilot operated pressure regulating valve; 6. a pressure switch; 7. an analog signal pressure sensor; 8. a second normally-closed switch; 9. a normally open switch; 10. a temperature sensor; 11. a first normally closed switch; 12. and a normally closed switch III.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the automatic pressurization calibration device for the on-line vibrating tube liquid densitometer according to the embodiment of the invention comprises a normal pressure circulation pipeline and a pressurization circulation pipeline; the normal-pressure circulating pipeline comprises a liquid circulating pump 2, the input end of the liquid circulating pump 2 is connected with a thermostatic bath 4 through a pipeline, the output end of the liquid circulating pump 2 is connected with the input end of an online vibrating tube liquid densimeter 1 through a pipeline, and the output end of the online vibrating tube liquid densimeter 1 is connected with the thermostatic bath 4 through a pipeline; the pressurizing circulation pipeline comprises a booster pump 3, the input end of the booster pump 3 is connected with the constant temperature groove 4 through a pipeline, the output end of the booster pump 3 is connected with the input end of the online vibrating tube liquid densimeter 1 through a pipeline, and a pilot type pressure regulating valve 5 is arranged on a connecting pipeline between the booster pump 3 and the online vibrating tube liquid densimeter 1.
In one embodiment of the invention, the device comprises a normal-pressure circulation pipeline, the pressurization circulation pipeline is closed, liquid in a constant-temperature tank 4 is pumped into an online vibrating tube liquid densimeter 1 through a liquid circulation pump 2 to be detected and then flows back to the constant-temperature tank 4, one normal-pressure circulation is completed, the normal-pressure circulation generally needs four liquids to complete the circulation, and finally data are collected through a computer and correlation coefficients are fitted through software.
In one embodiment of the invention, the device also comprises a pressurization circulating pipeline, wherein the normal-pressure circulating pipeline is closed, liquid in the constant-temperature tank 4 is pumped out through the booster pump 3 and pressurized, and meanwhile, the corresponding working pressure is adjusted through the pilot pressure adjusting valve 5 and conveyed into the online vibrating tube liquid densimeter 1; the pilot-operated pressure regulating valve 5 mainly comprises a pilot control valve taking a runner as a pressure regulating element, a main valve with a main valve core and a one-way valve, the pressure is reduced by a system through the runner, so that the online vibrating tube liquid densimeter 1 obtains different working pressures, an internal cam can be used for adjusting spring preload, and an output shaft of a runner transmission device rotates the internal cam through a spring seat, so that the working pressure is changed; the computer respectively collects the vibration period signals of the online vibrating tube liquid densimeter 1 under different pressure points, the pressure coefficient of the online vibrating tube liquid densimeter 1 is fitted through software, two liquids are generally needed for pressurizing circulation to complete the circulation, and the vibration period signals of the densimeter under six pressure points at least need to be collected in each liquid pressurizing calibration experiment.
In one embodiment of the invention, the temperature of the liquid has an influence on the detection of the density, and therefore the thermostatic bath 4 is arranged to keep the liquid at a constant temperature; the temperature sensor is arranged at the input end of the on-line vibrating tube liquid densimeter 1 to detect the current input temperature, and simultaneously, the data is transmitted to the computer for recording.
In one embodiment of the invention, the output end of the booster pump 3 is provided with an overflow valve which plays a role in protecting the system pressure, the maximum working pressure of the booster pump 3 is designed to be 10MPa, and the maximum working pressure actually used in a calibration experiment is 3MPa. If an abnormal condition occurs, which causes the system pressure to exceed the rated pressure, the pilot operated relief valve operates for limiting and unloading the working pressure by solenoid operation, the valve mainly consists of a housing and a pilot controlled valve with an adjustment type, the pressure applied in the passage P acts on the main spool, and the pressure is also applied to the spool through the nozzle hole, if the pressure in the passage P exceeds the value set on the spring, the spool will open against the spring, at which time the liquid flows from the passage P through the nozzle hole into the spring chamber, from where the liquid is introduced into the liquid tank through the control oil passage, and due to the equilibrium state formed at the main spool, the hydraulic oil flows from the passage P to the passage L while maintaining the set working pressure; meanwhile, the pilot-operated pressure regulating valve 5 enables part of liquid to flow back into the constant temperature tank 4 through an output end pipeline of the overflow valve to play a certain pressure relief role.
In one embodiment of the invention, a pressure switch 6 and an analog signal pressure sensor 7 are arranged on a pipeline between the pilot type pressure regulating valve 5 and the input end of the online vibrating tube liquid densimeter 1, the analog signal pressure sensor 7 can detect the pressure of liquid from the pilot type pressure regulating valve 5 and transmit the pressure to a computer for recording, and the pressure of the liquid from the pilot type pressure regulating valve 5 can be further adjusted through the pressure switch 6, so that the pressure is more accurate.
In summary, the following steps: the main system of the invention comprises: the hydraulic system comprises a hydraulic pump, a hydraulic pipeline, an overflow valve, a pilot type pressure regulating valve, a thermostatic bath, a temperature sensor and a pressure sensor; the computer software interface system comprises the acquisition of vibration period or frequency signals of the online vibrating tube liquid densitometer; the automatic pressurization of the online vibrating tube densimeter is the key content of the invention, the hydraulic pump, the pressure-bearing pipeline and the corresponding hydraulic elements are used for controlling the pressure, the technologies of computer, automatic control and the like are combined to realize the automatic pressurization of the verification and calibration of the online vibrating tube densimeter, and the real density value of the online vibrating tube densimeter at each pressure point can be calculated through the obtained pressure coefficient.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides an automatic pressurization calibrating device of online vibrating tube hydrodensimeter which characterized in that: comprises a normal pressure circulating pipeline and a pressurizing circulating pipeline; the normal-pressure circulation pipeline comprises a liquid circulation pump (2), the input end of the liquid circulation pump (2) is connected with the thermostatic bath (4) through a pipeline, the output end of the liquid circulation pump (2) is connected with the input end of the on-line vibrating tube liquid densimeter (1) through a pipeline, and the output end of the on-line vibrating tube liquid densimeter (1) is connected with the thermostatic bath (4) through a pipeline; the pressurization circulation pipeline comprises a booster pump (3), the input end of the booster pump (3) is connected with the constant temperature tank (4) through a pipeline, the output end of the booster pump (3) is connected with the input end of the online vibrating tube liquid densimeter (1) through a pipeline, and a pilot type pressure regulating valve (5) is arranged on a connecting pipeline between the booster pump (3) and the online vibrating tube liquid densimeter (1).
2. The automatic pressurization calibration device for an in-line vibrating tube liquid densitometer of claim 1, wherein: and a first normally closed switch (11) is arranged at the output end of the liquid circulating pump (2).
3. The automatic pressurization calibration device for an in-line vibrating tube densitometer of claim 1, wherein: the input end of the online vibrating tube liquid densimeter (1) is provided with a temperature sensor (10), and the output end of the online vibrating tube liquid densimeter (1) is provided with a normally open switch (9).
4. The automatic pressurization calibration device for an in-line vibrating tube densitometer of claim 1, wherein: a normally closed switch II (8) is arranged on a pipeline between the booster pump (3) and the pilot type pressure regulating valve (5), and a pressure switch (6) and an analog signal pressure sensor (7) are arranged on a pipeline between the pilot type pressure regulating valve (5) and the input end of the on-line vibrating tube liquid densimeter (1).
5. The automatic pressurization calibration device for an in-line vibrating tube densitometer of claim 1, wherein: the output end of the booster pump (3) is provided with an overflow valve, and the output end of the overflow valve is connected with the thermostatic bath (4) through a pipeline.
6. The automatic pressurization calibration device for an in-line vibrating tube densitometer of claim 5, wherein: one end of the pilot-operated pressure regulating valve (5) is connected with the output end of the overflow valve through a pipeline, and the output end of the overflow valve is provided with a normally closed switch III (12).
7. A method of calibrating an automatic pressurization calibration apparatus for an in-line vibrating tube densitometer of claim 1, wherein: the method comprises the following steps:
s1, cleaning and drying the online vibrating tube liquid densimeter (1);
s2, closing the normal-pressure circulating pipeline, and opening the booster pump (3) to pressurize the whole pressurizing circulating pipeline;
s3, closing a valve of a pressurization system and then closing a booster pump (3) when the pressurization reaches a certain value;
s4, adjusting the working pressure of the online vibrating tube liquid densimeter (1) through the pilot type pressure regulating valve (5), and respectively acquiring vibration period signals of the online vibrating tube liquid densimeter (1) at different pressure points through a computer;
and S5, after the acquisition is finished, processing and storing the acquired data through a computer, and fitting the pressure coefficient of the online vibrating tube liquid densimeter (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094632.XA CN115184210B (en) | 2022-09-08 | 2022-09-08 | Automatic pressurization calibration device and method for online vibrating tube liquid densimeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211094632.XA CN115184210B (en) | 2022-09-08 | 2022-09-08 | Automatic pressurization calibration device and method for online vibrating tube liquid densimeter |
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| CN115184210A true CN115184210A (en) | 2022-10-14 |
| CN115184210B CN115184210B (en) | 2023-01-13 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001215145A (en) * | 2000-01-31 | 2001-08-10 | Tokiko Techno Kk | Flowmeter calibration system |
| CN102023121A (en) * | 2010-11-11 | 2011-04-20 | 朱茜 | Petroleum hydrometer calibration device and method |
| RU170327U1 (en) * | 2016-07-13 | 2017-04-21 | Общество с ограниченной ответственностью "Нефтяные и газовые измерительные технологии", ООО "НГИТ" | Installation for calibration, verification and control of metrological characteristics of flow densitometers of oil and oil products |
| CN109211726A (en) * | 2018-11-19 | 2019-01-15 | 厦门大学 | A kind of online resonant mode densitometer calibrating installation |
| CN111982741A (en) * | 2020-09-24 | 2020-11-24 | 新疆维吾尔自治区计量测试研究院 | Online vibrating tube liquid densimeter verification and calibration device |
| CN114414432A (en) * | 2022-01-24 | 2022-04-29 | 深圳国检计量测试技术有限公司 | Efficient calibration device and method for vibrating densimeter |
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2022
- 2022-09-08 CN CN202211094632.XA patent/CN115184210B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001215145A (en) * | 2000-01-31 | 2001-08-10 | Tokiko Techno Kk | Flowmeter calibration system |
| CN102023121A (en) * | 2010-11-11 | 2011-04-20 | 朱茜 | Petroleum hydrometer calibration device and method |
| RU170327U1 (en) * | 2016-07-13 | 2017-04-21 | Общество с ограниченной ответственностью "Нефтяные и газовые измерительные технологии", ООО "НГИТ" | Installation for calibration, verification and control of metrological characteristics of flow densitometers of oil and oil products |
| CN109211726A (en) * | 2018-11-19 | 2019-01-15 | 厦门大学 | A kind of online resonant mode densitometer calibrating installation |
| CN111982741A (en) * | 2020-09-24 | 2020-11-24 | 新疆维吾尔自治区计量测试研究院 | Online vibrating tube liquid densimeter verification and calibration device |
| CN114414432A (en) * | 2022-01-24 | 2022-04-29 | 深圳国检计量测试技术有限公司 | Efficient calibration device and method for vibrating densimeter |
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| CN115184210B (en) | 2023-01-13 |
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