CN214040268U - Calibration device of volume correction instrument of gas flowmeter - Google Patents
Calibration device of volume correction instrument of gas flowmeter Download PDFInfo
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- CN214040268U CN214040268U CN202022362291.2U CN202022362291U CN214040268U CN 214040268 U CN214040268 U CN 214040268U CN 202022362291 U CN202022362291 U CN 202022362291U CN 214040268 U CN214040268 U CN 214040268U
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Abstract
The application provides a calibrating device of a volume corrector of a gas flowmeter, which comprises a temperature calibrating device, a pressure calibrating device, data acquisition equipment and an industrial personal computer; the temperature calibration device comprises a constant temperature box, and a fixing device for fixing the gas flowmeter is arranged in the constant temperature box; the pressure calibration device comprises a gas supply device, and the gas supply device comprises a gas pipeline communicated with a pressure test channel of the gas flowmeter; the data acquisition equipment is provided with a communication interface for connecting with the flowmeter volume corrector; the data acquisition equipment and the pressure calibration device are both connected with the industrial personal computer. The temperature calibration device in the calibration device can be used for integrally placing the integrated gas flowmeter and the volume corrector and realizing automatic temperature adjustment; the pressure calibration device is connected with the industrial personal computer, so that the integral automatic pressurization can be realized; the data acquisition equipment is connected with the industrial personal computer, and can process data through the industrial personal computer, so that the human interference is reduced, and the accuracy of the data is improved.
Description
Technical Field
The application relates to the technical field of fluid metering, in particular to a calibrating device of a volume corrector of a gas flowmeter.
Background
With the advance of science and technology, the natural gas trade in China still adopts the mode of volume flow. The gas flow meter and the gas volume correction instrument (hereinafter referred to as the volume correction instrument) are often adopted. The adopted gas flow meters are mostly turbine flow meters, Roots (Roots) flow meters and the like; however, the flow meters of either type are only capable of metering the cumulative volumetric flow of natural gas at operating conditions (20 ℃, 101.325 kPa). While the cumulative volumetric flow of natural gas is affected by the real-time pressure and temperature of the natural gas. In high-pressure (or low-pressure) and high-temperature (or low-temperature) environments, the cumulative volume flow of the natural gas is obviously influenced and even can be changed in multiples, which is far larger than the possible error of the base table. At this time, if the accumulated volume flow under the working condition is still adopted to carry out trade settlement, the principle of fair trade is not met. Thus, a volume corrector is required to assist trade settlement.
The type of the volume corrector is divided into two types according to whether the pressure sensor and the temperature sensor are easy to be disassembled from the flowmeter base table or not, wherein the pressure sensor, the temperature sensor and the mounting joint are all arranged in the flowmeter base table and are difficult to disassemble, the volume corrector is called as an integrated volume corrector and can only be used for calibration as a whole; the pressure sensor joint and the temperature sensor joint are external interfaces, are easy to disassemble, are called split type volume correction instruments, and can be respectively connected with a pressure measurement part and a temperature measurement part of a calibration standard device of the volume correction instrument for calibration. The volume correction instruments of two configurations exist and are numerous in the current domestic market, and in order to ensure the fairness and justice of gas trade settlement, higher requirements are provided for the coverage comprehensiveness and conclusion accuracy of the calibration work of the volume correction instruments, and the current detection correction instruments are characterized in that:
in the prior art, all correction instrument calibration devices mostly adopt a step method to respectively calibrate the flow, the pressure and the temperature of a correction instrument, and respectively give instantaneous flow, pressure indication values and temperature indication value errors.
When the calibration device in the prior art is used for calibration, pressure and temperature sensors of the volume corrector need to be detached and then connected into a standard device, so that the calibration steps are complicated and the data error is large; in addition, the integrated volume correction instrument is difficult to detach due to the characteristics of the pressure and temperature sensor design structure or the material, so the conventional calibration device cannot be applied to the integrated volume correction instrument.
Disclosure of Invention
The technical problem that the calibrating device of the gas flowmeter volume correction appearance among the prior art calibration procedure is loaded down with trivial details, the data error is great and be difficult to be applied to integral type volume correction appearance is solved in this application.
In order to solve the technical problem, the embodiment of the application discloses a calibration device of a volume corrector of a gas flowmeter, which comprises a temperature calibration device, a pressure calibration device, data acquisition equipment and an industrial personal computer;
the temperature calibration device comprises a constant temperature box, and a fixing device for fixing the gas flowmeter is arranged in the constant temperature box;
the pressure calibration device comprises a gas supply device, and the gas supply device comprises a gas pipeline communicated with a pressure testing channel of the gas flowmeter;
the data acquisition equipment is provided with a communication interface used for being connected with the flowmeter volume corrector;
the data acquisition equipment and the pressure calibration device are connected with the industrial personal computer.
Furthermore, the temperature calibration device also comprises a temperature measurement device, and the temperature measurement device is arranged on the fixing device;
the temperature measuring device is connected with the data acquisition equipment.
Further, the temperature measuring device comprises a thermometer.
Further, the temperature calibration device further comprises an air circulation system, and the air circulation system is connected with the incubator.
Further, the pressure calibration device further comprises a pressure adjusting device;
the pressure adjusting device is respectively connected with the gas supply device and the industrial personal computer.
Further, the pressure adjusting device comprises a pressure calibrator.
Further, the gas supply device comprises a high-pressure nitrogen gas cylinder.
Further, the fixing device comprises a first flange plate and a second flange plate; the first flange plate and the second flange plate are fixed at two ends of the gas flowmeter.
Furthermore, a temperature test hole is formed in the first flange plate.
Furthermore, a through hole communicated with a pressure testing channel of the gas flowmeter is formed in the first flange plate, and the gas pipeline is communicated with the through hole.
By adopting the technical scheme, the application has the following beneficial effects:
the temperature calibration device in the calibration device of the volume corrector of the gas flowmeter adopts the thermostat, can be used for integrally placing the integrated gas flowmeter and the volume corrector, and realizes automatic temperature adjustment; the pressure calibration device is connected with the industrial personal computer, so that the integral automatic pressurization of the integrated gas flowmeter and the volume corrector can be realized; the data acquisition equipment is connected with the industrial personal computer, and data processing can be performed through the industrial personal computer, so that the man-made interference is reduced, and the accuracy of data is improved; and the calibration device can carry out unified calibration of temperature and pressure to the integral type volume correction instrument.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a calibration device of a volume correction instrument of a gas flowmeter according to an embodiment of the present application.
The following is a supplementary description of the drawings:
1-a constant temperature box; 2-a fixing device; 3-a gas supply device; 4-a data acquisition device; 5-an industrial personal computer; 6-a temperature measuring device; 7-a pressure regulating device; 8-a first flange; 9-a second flange plate; 10-printing device.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
Referring to fig. 1, fig. 1 is a schematic diagram of a calibration device of a volume corrector of a gas flowmeter according to an embodiment of the present application, where the calibration device includes a temperature calibration device, a pressure calibration device, a data acquisition device 4, and an industrial personal computer 5; the calibrating device provided by the embodiment of the application can be applied to not only a split type volume corrector, but also an integrated volume corrector (namely, the pressure sensor, the temperature sensor and the mounting joint are all arranged in the integrated volume corrector of a flowmeter base table); the gas flowmeter can be a gas flowmeter or a gas flowmeter of other gases;
the temperature calibration device comprises a constant temperature box 1, wherein a fixing device 2 for fixing the gas flowmeter is arranged in the constant temperature box 1; the fixture 2 may comprise a first flange 8 and a second flange 9; the first flange 8 and the second flange 9 are fixed to both ends of the gas flowmeter.
In the embodiment of the application, the temperature calibration device further comprises a temperature measurement device 6, and the temperature measurement device 6 is arranged on the fixing device 2; the temperature measuring device 6 is connected with the data acquisition device 4.
In the embodiment of the present application, the temperature measuring device 6 may be a thermometer, which is a standard thermometer. Other standard instruments for measuring temperature, such as sensors, etc., are also possible. In the embodiment of the application, the temperature test hole arranged on the first flange plate 8 can be used for placing a thermometer, so that a standard thermometer can be close to a detected temperature sensor as much as possible, and the accuracy of calibration data is improved.
In the embodiment of the present application, the temperature calibration apparatus further includes an air circulation system, and the air circulation system is connected to the oven 1.
In the embodiment of the application, temperature calibration device adopts thermostated container 1, and integral type gas flowmeter can wholly put into thermostated container 1 together with the volume correction appearance to realize temperature automatically regulated, solved the unable problem of calibration that the unable dismantlement of integral type volume correction appearance temperature sensor brought. The thermostat 1 is connected with the gas circulating device, so that the thermostat 1 has a gas circulating function, can realize the circulating flow of hot air, and can quickly raise and lower the temperature to a preset calibration temperature point. The time required for heating and cooling the thermostat 1 is reduced, and the working efficiency is improved.
In the embodiment of the present application, the pressure calibration apparatus includes a gas supply apparatus 3, and the gas supply apparatus 3 includes a gas pipeline communicated with a pressure test channel of the gas flowmeter; in the embodiment of the present application, the first flange 8 is provided with a through hole communicated with the pressure testing channel of the gas flowmeter, and the gas pipeline is communicated with the through hole. The pressure calibration devices are all connected with the industrial personal computer 5;
in the embodiment of the application, flange plates are used for fixing two ends of the flowmeter, screws are used for fixing, a gas pipeline is connected into a pressure testing channel of the gas flowmeter, and integral automatic pressurization of the gas flow and the volume corrector can be achieved. The problem of the unable calibration that brings of unable dismantlement of integral type volume correction appearance pressure sensor is solved.
In the embodiment of the present application, the pressure calibration apparatus further includes a pressure adjusting apparatus 7; the pressure adjusting device 7 is connected to the gas supply device 3 and the industrial personal computer 5, respectively.
In the embodiment of the application, the pressure adjusting device 7 comprises a pressure calibrator which can be a medium-low pressure calibrator, each channel comprises two pressure modules, the detection capacity of the maximum pressure of 40bar can be achieved, the medium-low pressure calibrator can be connected to a pressure detection channel of a flowmeter through a special pressure pipeline, and the industrial personal computer 5 controls the medium-low pressure calibrator to realize automatic pressure adjustment;
in the embodiment of the present application, the gas supply device 3 may be a high-pressure nitrogen cylinder, and the high-pressure nitrogen cylinder is used to provide pure and dry nitrogen as a working medium.
In the embodiment of the application, the data acquisition equipment 4 is provided with a communication interface for connecting with a flowmeter volume corrector; the data acquisition equipment 4 is connected with an industrial personal computer 5. The industrial personal computer 5 can process and store the data acquired by the data acquisition equipment 4;
the data acquisition equipment 4 and the volume corrector transmit data by adopting an RS485 communication protocol, are connected to a connecting terminal in the volume corrector by adopting a shielding lead, acquire calibration data by a data acquisition unit and store the calibration data in the industrial personal computer 5, and complete data processing by a specific program in the industrial personal computer 5; according to the embodiment of the application, data are automatically acquired and processed by the industrial personal computer, so that human interference is reduced, and the accuracy of the data is improved.
In the embodiment of the application, the industrial personal computer 5 comprises a control unit, the control unit comprises a judgment module, and the judgment module is used for judging conversion coefficient errors, integration errors, pressure measurement errors and temperature measurement errors; and the intuitive error judgment of the integration error is increased, and the intuitiveness and the scientificity of the calibration conclusion are increased.
In the embodiment of the application, the industrial personal computer is connected with a printing device 10 and a display device.
In the embodiment of the application, the calibration device further comprises a power adapter, and the volume corrector is connected with the power adapter.
The working steps of the calibration device according to the embodiment of the present application are briefly described below; the method comprises the following steps:
a preparation stage:
the constant temperature box 1 is started to automatically raise or lower the temperature to a set temperature range, for example, 20 ℃, and the temperature is kept stable;
the detected gas flowmeter is placed on a fixing device 2 in the constant temperature box 1, a corresponding flange piece is selected according to the caliber of the flowmeter, and the flange piece is screwed up and fixed by screws.
And opening the outer cover of the volume corrector, and connecting the data acquisition equipment 4 with a corresponding wiring terminal in the volume corrector through a special shielding wire.
A detection stage:
the temperature is kept constant at 20 ℃, 5 calibrated pressure points are selected according to the maximum pressure value of the volume corrector and are arranged in the industrial personal computer 5 system; connecting a calibration gas pipeline with a through hole reserved in a flange sheet through a professional tool, opening a high-pressure nitrogen cylinder valve and a pressure reducing valve, closing valves at two ends of a pressure testing channel, and controlling a medium-low pressure calibrator to finish automatic adjustment and stabilization of a pressure point through an industrial personal computer 5; calibration data are automatically acquired and stored in the industrial personal computer 5 through the RS485 communication protocol by the data acquisition equipment 4, and the judgment module in the industrial personal computer 5 automatically calculates and judges.
Open pressure test passageway both ends valve, start air circulation system's vacuum pump, select 3 temperature points of calibration according to volume correction appearance maximum temperature value, set up the temperature of thermostated container 1 to first temperature point, after stabilizing a period, calibration data is saved in industrial computer 5 by data acquisition equipment 4 through RS485 communication protocol automatic acquisition, the calibration of three temperature point is accomplished in the repetitive operation, and the judgment module is automatic to be calculated and is judged in industrial computer 5.
The calibration device is used for detecting a volume corrector of a gas flowmeter, detecting a pressure sensor, a temperature sensor, an integration error and a conversion coefficient error, and the data are shown in the following tables 1-4:
TABLE 1 pressure sensor test data
TABLE 2 temperature sensor test data
TABLE 3 Integrated error test data
TABLE 4 conversion coefficient error test data
In the embodiment of the application, the pressure value, the temperature value, the integrated value and the conversion coefficient of the volume corrector of the gas flowmeter to be detected can be directly read, acquired or automatically calculated, the indicating value error and the conclusion are automatically judged by the industrial personal computer, and the detection efficiency and the detection precision can be effectively improved without artificial interference in the whole process.
In conclusion, the temperature calibration device in the calibration device of the volume corrector of the gas flowmeter provided by the application adopts the thermostat, can be used for integrally putting the integrated gas flowmeter and the volume corrector together, and realizes automatic temperature adjustment; the pressure calibration device is connected with the industrial personal computer, so that the integral automatic pressurization of the integrated gas flowmeter and the volume corrector can be realized; the data acquisition equipment is connected with the industrial personal computer, and data processing can be performed through the industrial personal computer, so that the man-made interference is reduced, and the accuracy of data is improved; and the calibration device can carry out unified calibration of temperature and pressure to the integral type volume correction instrument.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. A calibrating device of a volume corrector of a gas flowmeter is characterized by comprising a temperature calibrating device, a pressure calibrating device, data acquisition equipment (4) and an industrial personal computer (5);
the temperature calibration device comprises a constant temperature box (1), and a fixing device (2) for fixing the gas flowmeter is arranged in the constant temperature box (1);
the pressure calibration device comprises a gas supply device (3), wherein the gas supply device (3) comprises a gas pipeline communicated with a pressure test channel of the gas flowmeter;
the data acquisition equipment (4) is provided with a communication interface for connecting with the flowmeter volume corrector;
the data acquisition equipment (4) and the pressure calibration device are connected with the industrial personal computer (5).
2. The calibration device for the volume corrector of a gas meter according to claim 1, characterized in that said temperature calibration device further comprises a temperature measuring device (6), said temperature measuring device (6) being provided on said fixing means (2);
the temperature measuring device (6) is connected with the data acquisition equipment (4).
3. Calibration device of a volume corrector for a gas meter according to claim 2, characterized in that said temperature measuring means (6) comprise a thermometer.
4. Calibration device of a volume corrector for a gas meter according to claim 2, characterized in that said temperature calibration device further comprises an air circulation system connected to said incubator (1).
5. Calibration device of a volume corrector for a gas meter according to claim 1, characterized in that said pressure calibration device further comprises a pressure adjustment device (7);
the pressure adjusting device (7) is respectively connected with the gas supply device (3) and the industrial personal computer (5).
6. Calibration device of a volume corrector for a gas meter according to claim 5, characterized in that said pressure adjustment means (7) comprise a pressure prover.
7. Calibration device of a volume corrector for a gas meter according to claim 1, characterized in that said gas supply means (3) comprise a high-pressure nitrogen gas cylinder.
8. The calibration device for a volume corrector of a gas meter according to claim 1, characterized in that said fixing means (2) comprise a first flange (8) and a second flange (9); the first flange plate (8) and the second flange plate (9) are fixed at two ends of the gas flowmeter.
9. The calibrating device for volume corrector of gas flowmeter according to claim 8, wherein said first flange plate (8) is provided with a temperature measuring hole.
10. The calibrating device for the volume correction instrument of the gas flowmeter as set forth in claim 8, wherein the first flange plate (8) is provided with a through hole communicating with a pressure test passage of the gas flowmeter, and the gas line communicates with the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022362291.2U CN214040268U (en) | 2020-10-21 | 2020-10-21 | Calibration device of volume correction instrument of gas flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022362291.2U CN214040268U (en) | 2020-10-21 | 2020-10-21 | Calibration device of volume correction instrument of gas flowmeter |
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| CN214040268U true CN214040268U (en) | 2021-08-24 |
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| CN202022362291.2U Active CN214040268U (en) | 2020-10-21 | 2020-10-21 | Calibration device of volume correction instrument of gas flowmeter |
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