CN218544019U - Natural gas real-flow verification system - Google Patents
Natural gas real-flow verification system Download PDFInfo
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- CN218544019U CN218544019U CN202223016720.6U CN202223016720U CN218544019U CN 218544019 U CN218544019 U CN 218544019U CN 202223016720 U CN202223016720 U CN 202223016720U CN 218544019 U CN218544019 U CN 218544019U
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Abstract
The utility model discloses a natural gas real current verification system, which comprises a gas temperature adjusting device, a bell-type gas flow verification device, a fan, a gas discharge chamber, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a first on-off valve, a second on-off valve, a third on-off valve, a fourth on-off valve and a fifth on-off valve; one end of each of the first pipeline, the second pipeline and the third pipeline is connected to an air inlet of the gas temperature adjusting device; the gas outlet of the gas temperature adjusting device is connected to the gas inlet of the bell-type gas flow calibrating device through a gas pipeline, one end of the fourth pipeline is connected to the gas outlet of the bell-type gas flow calibrating device, and one end of the fifth pipeline is connected to the gas inlet of the gas discharge chamber. Adopt the utility model discloses can realize carrying out the real current examination to the gas meter respectively with two kinds of media of natural gas and air to improve the accuracy of examining and determine the gas meter greatly.
Description
Technical Field
The utility model belongs to the technical field of the natural gas real current detects, in particular to natural gas real current verification system.
Background
The bell-jar gas flow standard device is standard equipment for detecting the diaphragm gas meter by taking air as a medium, and consists of two parts, namely a bell-jar gas flow standard device and a detection workbench. The principle is that the effective volume in the bell jar is used as the standard volume, and when the bell jar descends, gas in the bell jar flows through the detected gas meter through the connecting pipeline. And taking the volume of the bell jar converted from the descending height of the bell jar as a standard volume, and comparing the standard volume with the volume indicated by the gas meter to be detected to obtain the basic error of the gas meter to be detected. The gas meter is only detected by using air as a medium, and certain errors exist, so that a system capable of detecting the gas meter by using two media, namely air and natural gas, is urgently needed to be developed. The chinese patent specification with publication number CN113758544a discloses a bell-type gas flow verification device, which can solve the problem of large working strength when the existing bell-type gas flow verification device is used for natural gas real-current verification, but because the existing bell-type gas flow verification device can only use air as a medium for verification, the verification result still has errors.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can carry out the natural gas actual current verification system that examines and determine to gas table with two kinds of mediums of air and natural gas to improve the accuracy to gas table examination.
The technical scheme of the utility model as follows:
the utility model discloses a natural gas real current verification system, which comprises a bell-type gas flow verification device, a gas temperature regulating device, a fan, a gas discharge chamber, a first pipeline and a second pipeline which are respectively used for connecting a natural gas source and a nitrogen gas source, and a third pipeline connected with the fan; one end of each of the first pipeline, the second pipeline and the third pipeline is connected to an air inlet of the gas temperature adjusting device; a gas outlet of the gas temperature adjusting device is connected to a gas inlet of the bell-type gas flow calibrating device through a gas pipeline, a gas outlet of the bell-type gas flow calibrating device is connected with a fourth pipeline, a gas inlet of the gas discharge chamber is connected with a fifth pipeline, and one end of the fourth pipeline and one end of the fifth pipeline are respectively used for connecting a gas inlet and a gas outlet of a gas meter; a first on-off valve, a second on-off valve and a third on-off valve are respectively arranged on the first pipeline, the second pipeline and the third pipeline; and a fourth on-off valve and a fifth on-off valve are respectively arranged at the gas inlet and the gas outlet of the bell-type gas flow calibrating device and are used for controlling gas to enter and exit the bell-type gas flow calibrating device.
Preferably, the system further comprises an upper computer and a programmable controller, wherein the upper computer is respectively in communication connection with the programmable controller, the bell-type gas flow calibrating device and the gas meter to be detected and is used for receiving and processing data measured by the bell-type gas flow calibrating device and the gas meter; the programmable controller is respectively connected with the controlled ends of the first on-off valve, the second on-off valve, the third on-off valve, the fourth on-off valve and the fifth on-off valve and used for controlling the on-off of the controlled ends.
Preferably, pressure regulators are respectively arranged on the first pipeline and the second pipeline and used for controlling the pressure of gas in the pipelines; and the controlled end of the voltage regulator is connected to the programmable controller.
Preferably, a first temperature sensor and a first pressure sensor are arranged inside a bell of the bell-type gas flow calibrating device, and a second temperature sensor and a second pressure sensor are arranged at one end of the fourth pipeline, which is used for connecting a gas inlet of the gas meter; the signal output ends of the first pressure sensor, the second pressure sensor, the first temperature sensor and the second temperature sensor are respectively connected to an upper computer.
Preferably, a sixth on-off valve is further arranged on the fourth pipeline, and a seventh on-off valve and a gas flow rate regulating valve are arranged on the fifth pipeline; and the seventh on-off valve and the gas flow rate regulating valve are automatic control valves, and controlled ends of the seventh on-off valve and the gas flow rate regulating valve are respectively connected to the programmable controller.
Preferably, the gas temperature regulating device is a heat exchanger, and the bell-type gas flow calibrating device adopts double limiting protection of photoelectric limiting and mechanical limiting.
Preferably, the automatic control valves are all automatic pneumatic control valves
The beneficial effects of the utility model are that:
the gas temperature adjusting device is arranged, so that the temperature of the gas in the pipeline can be kept consistent with the indoor temperature, and the accuracy of gas meter verification is improved; adopt the utility model discloses can realize carrying out the real current examination to the gas meter respectively with two kinds of media of natural gas and air to improve the accuracy of examining and determine the gas meter greatly.
The opening and closing of the valve can be automatically controlled by arranging the upper computer and the programmable controller.
The pressure regulators are respectively arranged on the first pipeline and the second pipeline, so that the pressure of gas in the gas pipeline can be controlled, and the bell jar of the bell jar type gas flow calibrating device is prevented from being damaged.
The gas volume measured by the bell-type gas flow calibrating device and the gas volume measured by the gas meter can be converted into the gas volumes under the standard temperature and the standard pressure by arranging the first temperature sensor, the second temperature sensor, the first pressure sensor and the second pressure sensor, so that the accuracy of gas meter calibration is further improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, a natural gas real-flow verification system includes a gas temperature adjusting device 24, a bell jar type gas flow verification device 13, a fan 17, a gas discharge chamber 15, a first pipeline 1, a second pipeline 2, a third pipeline 3, a fourth pipeline 23, a fifth pipeline 26, a programmable controller, and an upper computer. The first pipeline 1 and the second pipeline 2 are respectively used for connecting a natural gas source 18 and a nitrogen gas source 16, one end of the third pipeline 3 is connected to a fan 17, and the first pipeline 1, the second pipeline 2 and the third pipeline 3 are respectively connected to an air inlet of a gas temperature adjusting device 24; a fourth pipeline 23 is connected to the gas outlet of the bell-type gas flow calibrating device 13, a fifth pipeline 26 is connected to the gas inlet of the gas discharge chamber 15, and one end of the fourth pipeline 23 and one end of the fifth pipeline 26 are respectively used for connecting the gas inlet and the gas outlet of the gas meter to be measured 14; a first on-off valve 4, a second on-off valve 5 and a third on-off valve 6 are respectively arranged on the first pipeline 1, the second pipeline 2 and the third pipeline 3; and a fourth on-off valve 7 and a fifth on-off valve 8 are respectively arranged at the gas inlet and the gas outlet of the bell-type gas flow calibrating device 13 and are used for controlling gas to enter and exit the bell-type gas flow calibrating device. The fourth pipe 23 is further provided with a sixth on-off valve 25, and the fifth pipe 26 is provided with a seventh on-off valve 9 and a gas flow rate adjustment valve 10. The first on-off valve, the second on-off valve, the third on-off valve, the fourth on-off valve, the fifth on-off valve, the sixth on-off valve, the seventh on-off valve and the gas flow rate regulating valve are all automatic control valves, controlled ends of the automatic control valves are respectively connected to the programmable controller, and the action of the automatic control valves is controlled by the programmable controller. The automatic control valve can be an automatic pneumatic control valve or a solenoid valve or other suitable valves. A first pressure regulator 11 and a second pressure regulator 12 are respectively arranged on the first pipeline 1 and the second pipeline 2 and used for controlling the pressure of gas in the pipelines; and the controlled end of the voltage regulator is connected to the programmable controller. The bell-jar type gas flow calibrating device has certain requirements on the pressure of gas during working, and the bell jar of the bell-jar type gas flow calibrating device can be prevented from being damaged by arranging the first pressure regulator 11 and the second pressure regulator 12.
The gas inlet and the gas outlet of the gas meter 14 are respectively connected through a mechanical locking type meter clamping device and a gas pipeline. The bell-type gas flow calibrating device 13 adopts photoelectric limit and mechanical limit dual limit protection. The nitrogen gas source 16 may employ a nitrogen tank. The gas temperature adjusting device 1 is a heat exchanger, and the gas temperature adjusting device can keep the temperature of gas in the pipeline consistent with the indoor temperature, so that the accuracy of gas meter verification is improved.
A first temperature sensor 19 and a first pressure sensor 20 are arranged inside a bell of the bell-type gas flow calibrating device, and a second temperature sensor 21 and a second pressure sensor 22 are arranged at one end of a fourth pipeline 23 connected with an air inlet of the gas meter 14. The upper computer is respectively in communication connection with the programmable controller, the bell-type gas flow calibrating device, the gas meter, the first temperature sensor, the second temperature sensor, the first pressure sensor and the second pressure sensor and is used for receiving and processing the measured data; the communication connection can be an electric connection or a wireless connection. Through setting up temperature sensor and pressure sensor, be convenient for convert the gas volume that the bell jar formula gas flow calibrating installation surveyed and the gas volume that the gas table surveyed into the gas volume under standard temperature and the pressure and compare again, further improved the accuracy of calibrating to the gas table.
The utility model discloses a theory of operation does: the gas meter can be subjected to real-flow verification by taking air as a medium, or can be subjected to real-flow verification by taking natural gas as a medium. After the real-flow verification of the gas meter is finished by using one gas, the residual gas in the pipeline needs to be completely discharged by using nitrogen, and then the real-flow verification of the gas meter is carried out by using the other gas. The method comprises the following steps of firstly carrying out real-current verification on the gas meter by taking natural gas as a medium, and then carrying out real-current verification on the gas meter by taking air as the medium:
firstly, the gas inlet and the gas outlet of the gas meter 14 to be tested are respectively connected with the fourth pipeline 23 and the fifth pipeline 26 in a sealing way; the first pipeline 1 and the second pipeline 2 are connected to a natural gas source 18 and a nitrogen gas source 16, respectively. In the initial state, all valves are in a closed state; firstly, a programmable controller sends pulse signals to a first on-off valve 4 and a fourth on-off valve 7 to control the on-off of the valves, sends pulse signals to a first pressure regulator 11 to regulate the pressure of gas in a first pipeline 1, natural gas in the first pipeline 1 flows into a bell-type gas flow calibrating device 13 through a gas temperature regulating device 24, when the gas in the bell-type gas flow calibrating device 13 reaches a set amount, the programmable controller controls the first on-off valve 4 and the fourth on-off valve 7 to be turned off, and simultaneously controls a fifth on-off valve 8, a sixth on-off valve 25 and a seventh on-off valve 9 to be turned on, the programmable controller controls the flow rate of the gas in the pipelines through a gas flow rate regulating valve 10, gas volume data measured by the bell-type gas flow calibrating device 13 and a bell-type gas meter 14, pressure data measured by a first pressure sensor and a second pressure sensor, and temperature data measured by the first temperature sensor and the second temperature sensor are transmitted to an upper computer in real time, and the upper computer converts the gas volumes measured by the bell-type gas flow calibrating device 13 and the gas meter 14 into data under standard pressure and temperature and compares the data.
After the gas meter is subjected to real-current verification by taking natural gas as a medium, the programmable controller opens the second on-off valve 5 and the fourth on-off valve 7 to completely discharge the residual natural gas in the pipeline of the whole system. And then the programmable controller controls the second on-off valve 5 and the fifth on-off valve 8 to be closed, controls the third on-off valve 6 to be opened, and starts to perform the real flow verification process on the gas meter, wherein the process is the same as the process of performing the real flow verification on the gas meter by using natural gas as a medium, and therefore the description is omitted.
After the real-current verification of the gas meter is finished by taking air as a medium, verification results under two media of natural gas and air are compared respectively, so that whether the precision of the gas meter is qualified or not is judged.
Adopt the utility model discloses can realize carrying out the real current examination to the gas meter respectively with two kinds of media of natural gas and air to improve the accuracy of examining and determine the gas meter greatly.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes, modifications and substitutions can be made therein without departing from the spirit and scope of the embodiments of the present invention.
Claims (7)
1. A natural gas real-flow verification system is characterized by comprising a bell-type gas flow verification device, a gas temperature adjusting device, a fan, a gas discharge chamber, a first pipeline, a second pipeline and a third pipeline, wherein the first pipeline and the second pipeline are respectively used for connecting a natural gas source and a nitrogen gas source, and the third pipeline is connected with the fan; one end of each of the first pipeline, the second pipeline and the third pipeline is connected to an air inlet of the gas temperature adjusting device; a gas outlet of the gas temperature adjusting device is connected to a gas inlet of the bell-type gas flow calibrating device through a gas pipeline, a gas outlet of the bell-type gas flow calibrating device is connected with a fourth pipeline, a gas inlet of the gas discharge chamber is connected with a fifth pipeline, and one end of the fourth pipeline and one end of the fifth pipeline are respectively used for connecting a gas inlet and a gas outlet of a gas meter; a first on-off valve, a second on-off valve and a third on-off valve are respectively arranged on the first pipeline, the second pipeline and the third pipeline; and a fourth on-off valve and a fifth on-off valve are respectively arranged at the gas inlet and the gas outlet of the bell-type gas flow calibrating device and are used for controlling gas to enter and exit the bell-type gas flow calibrating device.
2. The natural gas actual flow verification system of claim 1, further comprising an upper computer and a programmable controller, wherein the upper computer is in communication connection with the programmable controller, the bell-type gas flow verification device and the gas meter to be detected respectively, and is used for receiving and processing data detected by the bell-type gas flow verification device and the gas meter; the programmable controller is respectively connected with the controlled ends of the first on-off valve, the second on-off valve, the third on-off valve, the fourth on-off valve and the fifth on-off valve and used for controlling the on-off of the controlled ends.
3. The natural gas real-flow verification system as claimed in claim 1, wherein pressure regulators are respectively arranged on the first pipeline and the second pipeline for controlling the pressure of gas in the pipelines; and the controlled end of the voltage regulator is connected to the programmable controller.
4. The natural gas actual flow verification system according to claim 1, wherein a first temperature sensor and a first pressure sensor are arranged inside a bell jar of the bell-jar type gas flow verification device, and a second temperature sensor and a second pressure sensor are arranged at one end of the fourth pipeline, which is used for connecting with a gas inlet of a gas meter; the signal output ends of the first pressure sensor, the second pressure sensor, the first temperature sensor and the second temperature sensor are respectively connected to an upper computer.
5. The natural gas on-stream verification system as claimed in claim 1, wherein a sixth on-off valve is further provided on the fourth pipeline, and a seventh on-off valve and a gas flow rate regulating valve are provided on the fifth pipeline; and the seventh on-off valve and the gas flow rate regulating valve are automatic control valves, and controlled ends of the seventh on-off valve and the gas flow rate regulating valve are respectively connected to the programmable controller.
6. The natural gas real-flow verification system as claimed in claim 1, wherein the gas temperature regulation device is a heat exchanger, and the bell-type gas flow verification device adopts double-limit protection of photoelectric limit and mechanical limit.
7. The natural gas real flow verification system as claimed in claim 2, wherein the automatic control valve is an automatic pneumatic control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223016720.6U CN218544019U (en) | 2022-11-14 | 2022-11-14 | Natural gas real-flow verification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223016720.6U CN218544019U (en) | 2022-11-14 | 2022-11-14 | Natural gas real-flow verification system |
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| Publication Number | Publication Date |
|---|---|
| CN218544019U true CN218544019U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223016720.6U Active CN218544019U (en) | 2022-11-14 | 2022-11-14 | Natural gas real-flow verification system |
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| CN (1) | CN218544019U (en) |
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