High-pressure loop natural gas flowmeter calibration device

Abstract

The invention provides a high-pressure loop natural gas flowmeter calibration device which comprises a first measurement assembly, a heat cycle assembly and a second measurement assembly, the first measurement assembly comprises a first measurement unit and a first pipeline unit which are communicated, the heat cycle assembly is communicated with the first pipeline unit, and the second measurement assembly comprises a second measurement unit and a second pipeline unit which are communicated. The heat cycle assembly is communicated with the second pipeline unit, and when the first pipeline unit is communicated with the second pipeline unit, the first measuring unit is approved, and one end of the inspection assembly is communicated with the first pipeline unit or the second pipeline unit. The first approval part is communicated with the other end of the inspection component so as to approve whether the flow meter on the inspection component is accurate or not, and the first approval part is communicated with the other end of the thermal cycle component. According to the device, fuel gas continuously circulates to the first measuring unit or the second measuring unit through power provided by the thermal circulation assembly, and flow detection of the first pipeline unit or the second pipeline unit is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of natural gas, and particularly relates to a high-pressure loop natural gas flowmeter calibration device. BACKGROUND

[0002] At present, the results of the research on the calibration of gas flowmeters show that the gas flowmeter will present different metering characteristics under different working pressures of the gas, and therefore, for the metering verification of the gas flowmeter, especially the high-pressure gas flowmeter, the working pressure of the gas should be as same as or similar to the use condition of the gas flowmeter. Therefore, the verification pressure of the high-pressure flowmeter is correspondingly required, and therefore, the establishment of the high-pressure gas flowmeter verification device for verifying the high-pressure gas flowmeter is not only an effective method for ensuring the long-term accurate and reliable metering performance of the flowmeter, but also a necessary means for the accurate trade metering between the two parties in the current market conditions.

[0003] However, the existing natural gas flowmeter calibration device often adopts a direct discharge scheme, and the direct discharge scheme must rely on the natural gas discharge pipeline. Since the flowmeter calibration device is subject to the state (pressure, temperature, flow and back pressure, etc.) of the gas in the discharge pipeline, pressure adjustment, temperature adjustment, flow adjustment and back pressure adjustment, etc. need to be set on the inlet and outlet pipeline lines of the discharge pipeline, so that the whole process is complex and the investment is huge. In addition, since the direct discharge scheme needs to keep the natural gas flowing, the delivery of natural gas cannot be stopped, and if the delivery of natural gas is stopped, the flow measured by the flowmeter calibration device is not accurate enough. SUMMARY

[0004] In view of the above problems, the present application provides a high-pressure loop natural gas flowmeter calibration device, which comprises:

[0005] a heat circulation assembly;

[0006] a first measurement assembly comprising a first measurement unit and a first pipeline unit in communication, the heat circulation assembly being in communication with the first pipeline unit;

[0007] a second measurement assembly comprising a second measurement unit and a second pipeline unit in communication, the heat circulation assembly being in communication with the second pipeline unit, and the first measurement unit being approved when the first pipeline unit and the second pipeline unit are in communication;

[0008] a submission assembly having one end in communication with the first pipeline unit or the second pipeline unit;

[0009] a first approval member in communication with the other end of the submission assembly to approve whether the flowmeter on the submission assembly is accurate, the first approval member being in communication with the other end of the heat circulation assembly.

[0010] Optionally, the thermal cycle assembly comprises a high-pressure circulation component and a temperature control unit arranged in sequence, the high-pressure circulation component and the temperature control unit are communicated, and the temperature control unit is communicated with the first pipeline unit and / or the second pipeline unit.

[0011] Optionally, the temperature control unit comprises a heat source component and a temperature control component connected with each other, the heat source component is communicated with the first pipeline unit and / or the second pipeline unit, the heat source component is communicated with the high-pressure circulation component, and the temperature control component is connected with the heat source component.

[0012] Optionally, the first pipeline unit comprises a first conduit and a second conduit, one end of the first conduit and the second conduit is communicated with the thermal cycle assembly, and the other end thereof is respectively communicated with the second pipeline unit and / or the inspection assembly, and the first measurement unit is arranged on the first conduit and the second conduit, wherein the first conduit and the second conduit are communicated with the inspection assembly through a first oil pipe.

[0013] Optionally, the first measurement unit comprises a first standard verification component and a second standard verification component, the first standard verification component is arranged on and communicated with the first conduit, and the second standard verification component is arranged on and communicated with the second conduit.

[0014] Optionally, the second pipeline unit comprises a first channel and a second channel, when the thermal cycle assembly is communicated with the first channel and the second channel through a second oil pipe, a connection passage between the second oil pipe and the first pipeline unit is closed, the first channel and the second channel are respectively communicated with the inspection assembly, and the second measurement unit is arranged on and communicated with the first channel and the second channel.

[0015] When the first channel and the second channel are respectively communicated with the first pipeline unit, the connection passage between the second oil pipe and the first pipeline unit is opened to authorize the first measurement unit.

[0016] Optionally, the second measurement unit comprises a first adjustment component, a second adjustment component, a first verification component, a second verification component, a first secondary verification component and a second secondary verification component, the first adjustment component, the first verification component and the first secondary verification component are arranged on the first channel in a spaced manner and are communicated with each other, and the second adjustment component, the second verification component and the second secondary verification component are arranged on the second channel in a spaced manner and are communicated with each other.

[0017] Optionally, the submission assembly includes a fixture for setting a flow meter, the fixture being in communication with the first conduit unit and the first conduit unit, respectively, a first expansion compensator in communication with the flow meter, the first expansion compensator being in communication with the first authorization member, the flow meter being used for comparison with the first measurement unit or the second measurement unit to determine whether the flow meter is accurate.

[0018] Optionally, the first measurement unit further includes a first flow regulator and a second expansion compensator in communication with the first conduit, the first standard verification member being located between the first flow regulator and the second expansion compensator.

[0019] Optionally, further comprising a component analysis member and an automatic emptying member, the component analysis member being in communication between the thermal cycle assembly and the first conduit unit, the automatic emptying member being in communication with the first conduit unit.

[0020] The high-pressure loop natural gas flow meter calibration device of the present application can keep the temperature of natural gas stable in the pipeline and circulate continuously through the thermal cycle assembly, thereby avoiding the dependence on other natural gas pipeline for continuous gas supply to the device, that is, even if there is no continuous gas supply from other natural gas pipeline, the device can also provide continuous circulation of fuel gas to the first measurement unit or the second measurement unit under the power provided by the thermal cycle assembly, realizing the verification of the flow of the large-diameter first conduit unit or the small-diameter second conduit unit. In addition, the submission assembly can compare the submitted flow meter with the first measurement unit or the second measurement unit to confirm whether the flow meter is accurate, and the second measurement unit and the first authorization member can detect whether the first measurement unit or the second measurement unit has verification errors, thereby avoiding inaccurate detection results.

[0021] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and achieved by the structures indicated in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0023] Fig. 1 A schematic diagram of the high-pressure loop natural gas flow meter calibration device in the embodiment of the present application is shown;

[0024] Fig. 2 A specific diagram of the high-pressure loop natural gas flowmeter calibration device in the embodiment of the present application is shown;

[0025] Fig. 3 Another specific diagram of the high-pressure loop natural gas flowmeter calibration device in the embodiment of the present application is shown.

[0026] In the figure, 1-thermal cycle assembly, 2-first measurement assembly, 21-first measurement unit, 22-first pipeline unit, 3-second measurement assembly, 31-second measurement unit, 32-second pipeline unit, 4-submission assembly, 5-first approved component, 11-high pressure cycle component, 12-temperature control unit, 121-heat source component, 122-temperature control component, 221-first conduit, 222-second conduit, 211-first standard calibration component, 212-second standard calibration component, 321-first pipe, 322-second pipe, 311-first adjustment component, 312-second adjustment component, 313-first verification component, 314-second verification component, 315-first secondary calibration component, 316-second secondary calibration component, 41-fixed table, 42-first telescopic compensator, 223-first flow adjuster, 224-second telescopic compensator, 6-component analysis component, 7-automatic emptying component. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0028] As Figs. 1-3As shown, the present application provides a high-pressure loop natural gas flowmeter calibration device, comprising: a heat circulation assembly 1 for keeping the gas flow in the pipeline stable temperature and continuous circulation, a first measurement assembly 2, a second measurement assembly 3, a submission assembly 4 for judging whether the submitted flowmeter is accurate, and a first approval 5, the first measurement assembly 2 comprises a first measurement unit 21 for measuring the flow of large-diameter pipeline and a first pipeline unit 22, the first measurement unit 21 communicates with the first pipeline unit 22, the second measurement assembly 3 comprises a second measurement unit 31 for measuring the flow of small-diameter pipeline and approving the first measurement unit 21, and a second pipeline unit 32, the heat circulation assembly 1 communicates with the first pipeline unit 22 or the second pipeline unit 32, the second measurement unit 31 communicates with the second pipeline unit 32, and when the first pipeline unit 22 and the second pipeline unit 32 are communicated, the accuracy of the first measurement unit 21 is approved, wherein the large-diameter pipeline is 150-500 mm, the small-diameter pipeline is 80-150 mm, one end of the submission assembly 4 communicates with the first pipeline unit 22 or the second pipeline unit 32, the other end of the first approval 5 communicates with the submission assembly 4 to approve whether the flowmeter on it is accurate, and the other end of the first approval 5 communicates with the heat circulation assembly 1. Through the heat circulation assembly 1, the natural gas can be kept stable temperature and continuously circulated in the pipeline, thereby avoiding the dependence on other natural gas pipeline to continuously supply gas to the device, that is, even if there is no other natural gas pipeline to continuously supply gas, the device can also continuously circulate the gas to the large-diameter first pipeline unit 22 or the small-diameter second pipeline unit 32 under the power provided by the heat circulation assembly 1, realizing the verification of the first measurement unit 21 to the flow of the large-diameter first pipeline unit 22, or the second measurement unit 31 to the flow of the small-diameter second pipeline unit 32. Wherein, the heat circulation assembly 1 communicates with the first pipeline unit 22 or the small-diameter second pipeline unit 32 through the second oil pipe B, when measuring the fuel flow in the large-diameter first pipeline unit 22, the heat circulation assembly 1 communicates with the first pipeline unit 22 through the second oil pipe B, at this time, the channel of the second oil pipe B communicating with the second pipeline unit 32 is closed, and the first pipeline unit 22 communicates with the submission assembly 4 through the first oil pipe A. When measuring the fuel flow in the small-diameter second pipeline unit 32, the heat circulation assembly 1 communicates with the second pipeline unit 32 through the second oil pipe B, at this time, the channel of the second oil pipe B communicating with the first pipeline unit 22 is closed.

[0029] It should be noted that the heat cycle assembly 1 needs to adjust the temperature of the natural gas in the pipeline to the required temperature for calibration and stabilize, and then collect and process the calibration data of the flow meter. Specifically, when it is necessary to calibrate with the device, the high-pressure ring channel can be raised to the required pressure for calibration by using a storage tank or a booster pipeline connected to the high-pressure natural gas pipeline. When the storage tank or the high-pressure natural gas pipeline is removed, the device can still make the gas in the pipeline flow through the heat cycle assembly 1, without the need for other gas conveying devices to continuously convey gas, and can also achieve calibration of the gas in the pipeline, thereby making the entire scheme simpler. In addition, when a large-diameter pipeline is used, the first measurement unit 21 can calibrate the flow in the first pipeline unit 22. At this time, the heat cycle assembly 1, the first pipeline unit 22, the inspection assembly 4, and the first approval member 5 are sequentially connected, wherein the flow meter sent by the inspection assembly 4 is compared with the first measurement unit 21 to confirm whether the flow meter is accurate. If there is a difference, the first measurement unit 21 is compared with the first approval member 5, and if there is no difference, it is proved that the first measurement unit 21 accurately calibrates the flow in the pipeline, and the flow meter has an error. If there is a difference, the first measurement unit 21 needs to be reset, and the above calibration process needs to be performed again. When a small-diameter pipeline is used, the second measurement unit 31 can calibrate the flow in the second pipeline unit 32. At this time, the heat cycle assembly 1, the second pipeline unit 32, and the inspection assembly 4 are sequentially connected, wherein the flow meter sent by the inspection assembly 4 is compared with the calibration member on the second measurement unit 31 to confirm whether the flow meter is accurate. If there is a difference, the calibration member on the second measurement unit 31 is compared with the calibration member on the second measurement unit 31, and if there is no difference, it is proved that the second measurement unit 31 accurately calibrates the flow in the pipeline, and the flow meter has an error. If there is a difference, the second measurement unit 31 needs to be reset, and the above calibration process needs to be performed again. Further, when the first pipeline unit 22 and the second pipeline unit 32 are connected, the first measurement unit 21 needs to be detected to confirm whether the first measurement unit 21 is accurate to confirm whether the calibration flow result is accurate. Specifically, whether the total flow of several pipelines on the second pipeline unit 32 detected by the second measurement unit 31 is the same as the flow of one pipeline on the second pipeline unit 32 detected by the second measurement unit 31 is compared. If they are the same, it is proved that the first measurement unit 21 is accurate. If they are not the same, it is not accurate, and the first measurement unit 21 needs to be reset and the above process needs to be repeated.

[0030] As Fig. 1 and Fig. 2As shown, in an embodiment, the thermal cycle assembly 1 comprises a high-pressure circulation component 11 and a temperature control unit 12 arranged in sequence, the high-pressure circulation component 11 and the temperature control unit 12 are communicated, and the temperature control unit 12 is communicated with the first pipe unit 22 and / or the second pipe unit 32. It should be noted that when the large-diameter pipe flow is detected, the temperature control unit 12 is communicated with the first pipe unit 22; when the small-diameter pipe flow is detected, the temperature control unit 12 is communicated with the second pipe unit 32; and when the accuracy of the first pipe unit 22 is detected, the temperature control unit 12 is communicated with the first pipe unit 22 and the second pipe unit 32. The high-pressure circulation component 11 can generate a high-pressure airflow, the high-pressure airflow flows through the temperature control unit 12 and flows into the first pipe unit 22 and / or the second pipe unit 32, the temperature control unit 12 can generate heat, the heat flows into the first pipe unit 22 and / or the second pipe unit 32 with the high-pressure airflow, and the temperature control unit 12 can adjust the temperature of the generated heat, when the temperature of the natural gas in the first pipe unit 22 and / or the second pipe unit 32 reaches the standard, the temperature control unit 12 is not adjusted to be cooled or heated, so as to detect the flow of the first pipe unit 22 and / or the second pipe unit 32. Optionally, the high-pressure circulation component 11 can be a high-pressure explosion-proof blower, and the temperature control component 122 can be a heat exchanger.

[0031] In an embodiment, the temperature control unit 12 comprises a heat source component 121 and a temperature control component 122 connected with each other, the heat source component 121 is communicated with the first pipe unit 22 and / or the second pipe unit 32, the heat source component 121 is communicated with the high-pressure circulation component 11, and the temperature control component 122 is connected with the heat source component 121. The heat source component 121 can deliver the generated heat to the first pipe unit 22 and / or the second pipe unit 32, the temperature control component 122 can control the temperature of the heat generated by the heat source component 121, and after the temperature control component 122 adjusts the temperature of the natural gas to the required detection temperature and stabilizes, the detection data is collected and processed.

[0032] In an embodiment, the first pipe unit 22 comprises a first conduit 221 and a second conduit 222, one end of the first conduit 221 and the second conduit 222 are communicated with the thermal cycle assembly 1, and the other end is connected with the second pipe unit 32 and / or the inspection assembly 4 respectively, and the first measuring unit 21 is arranged on the first conduit 221 and the second conduit 222, wherein the first conduit 221 and the second conduit 222 are communicated with the inspection assembly 4 through the first oil pipe A. Optionally, the first pipe unit 22 can further comprise a third conduit, a fourth conduit and the like, and the number of pipes arranged can be determined according to the actual flow requirement, and the connection relationship is the same as that of the first conduit 221 and the second conduit 222. Specifically, when the flow of the large-diameter pipe is calibrated, the temperature control unit 12 on the thermal cycle assembly 1 is communicated with the first conduit 221 and the second conduit 222, and the first conduit 221 and the second conduit 222 are communicated with the inspection assembly 4 through the first oil pipe A, and when the accuracy of the first pipe unit 22 is detected, the temperature control unit 12 is communicated with the first conduit 221 and the second conduit 222, and is also communicated with the second pipe unit 32. In fact, the diameters of the first conduit 221 and the second conduit 222 can be the same or different according to the requirement.

[0033] In an embodiment, the first measuring unit 21 comprises a first standard calibration member 211 and a second standard calibration member 212, the first standard calibration member 211 is arranged on and communicated with the first conduit 221, and the second standard calibration member 212 is arranged on and communicated with the second conduit 222. The flow of the first conduit 221 and the second conduit 222 is calibrated through the first standard calibration member 211 and the second standard calibration member 212 respectively, and of course if other conduits are arranged, the corresponding number of standard calibration members need to be increased to realize the flow calibration of multiple conduits.

[0034] As Figs. 1-3In an embodiment, the second pipeline unit 32 includes a first pipeline 321 and a second pipeline 322. When the pipeline flow to be tested is small in diameter, the thermal cycle assembly 1 is connected to the first pipeline 321 and the second pipeline 322 through the second oil pipe B, respectively, the connection passage between the second oil pipe B and the first pipeline unit 22 is closed, the first pipeline 321 and the second pipeline 322 are connected to the testing assembly 4, respectively, the second measurement unit 31 is arranged and connected to the first pipeline 321 and the second pipeline 322, and when the first pipeline 321 and the second pipeline 322 are connected to the first pipeline unit 22, respectively, the connection passage between the second oil pipe B and the first pipeline unit 22 is opened to be approved by the first measurement unit 21. Optionally, the second pipeline unit 32 can also include a third pipeline and a fourth pipeline, etc. The number of pipelines to be arranged can be determined according to the actual flow requirement, and the connection relationship is the same as that of the first pipeline 321 and the second pipeline 322, which will not be described in detail. Specifically, when the small-diameter pipeline flow is tested, the temperature control unit 12 on the thermal cycle assembly 1 is connected to the first pipeline 321 and the second pipeline 322, the first pipeline 321 and the second pipeline 322 are connected to the testing assembly 4, and when the first pipeline unit 22 is tested for accuracy, the temperature control unit 12 is connected to the first pipeline 321 and the second pipeline 322, and the first pipeline 321 and the second pipeline 322 are connected to the first pipeline 321 and the second pipeline 322. In fact, the first pipeline 321 and the second pipeline 322 can be arranged to have the same or different diameters according to the requirement.

[0035] In one embodiment, the second measuring unit 31 comprises a first adjusting member 311, a second adjusting member 312, a first checking member 313, a second checking member 314, a first secondary verifying member 315 and a second secondary verifying member 316, the first adjusting member 311, the first checking member 313 and the first secondary verifying member 315 are arranged in sequence and communicated with the first pipe 321, the second adjusting member 312, the second checking member 314 and the second secondary verifying member 316 are arranged in sequence and communicated with the second pipe 322. Optionally, the first adjusting member 311 is used to adjust the uniformity of the gas flow in the pipe, the first adjusting member 311 has a plurality of holes, the gas passing through the plurality of holes can make the gas distribution uniform, which can ensure the accuracy of the verification, otherwise the measurement of the gas will not be accurate enough. The structure and function of the second adjusting member 312 are the same as those of the first adjusting member 311, the first checking member 313 and the second checking member 314 are respectively used to check whether the first secondary verifying member 315 and the second secondary verifying member 316 accurately verify the gas flow, and the first secondary verifying member 315 and the second secondary verifying member 316 are respectively used to verify the flow in the first pipe 321 and the second pipe 322. In addition, the sum of the verification flow of the first secondary verifying member 315 and the second secondary verifying member 316 is compared with the verification flow of the first standard verifying member 211 or the verification flow of the second standard verifying member 212 in the large-diameter pipe, if the flow is consistent, it proves that the verification flow of the first standard verifying member 211 or the second standard verifying member 212 is accurate.

[0036] In an embodiment, the submission assembly 4 comprises a fixed station 41 for setting the flow meter and a first telescopic compensator 42, the flow meter is in communication with the first pipe unit 22 and the first pipe unit 22 respectively, the flow meter is in communication with the first telescopic compensator 42, the first telescopic compensator 42 is in communication with the first authorized member 5, and the flow meter is used for comparison with the first measuring unit 21 or the second measuring unit 31 to determine whether the flow meter is accurate. The flow meter is fixed by the fixed station 41, so that the flow meter can be in communication with the first pipe unit 22 or the second pipe unit 32, so that the flow meter measures the flow of the pipe, and the flow of the flow meter is compared with the first standard verification member 211 or the second standard verification member 212 on the first measuring unit 21, if there is a difference, the first authorized member 5 needs to be compared with the first standard verification member 211 or the second standard verification member 212, if the comparison is consistent, it is determined that the flow meter is inaccurate, and the first standard verification member 211 or the second standard verification member 212 is accurate. Or the flow of the flow meter is compared with the first secondary verification member 315 or the second secondary verification member 316 on the second measuring unit 31 to verify the flow, if there is a difference, the flow verified by the first secondary verification member 315 or the second secondary verification member 316 is compared with the flow verified by the first secondary verification member 315 or the second secondary verification member 316, if the comparison result is consistent, it is determined that the flow meter is inaccurate, and the first secondary verification member 315 or the second secondary verification member 316 is accurate. The first telescopic compensator 42 can extend or retract the length of the telescopic compensator itself, so that it is more convenient to disassemble the flow meter. By telescopic disassembly, space can be reserved for disassembly, making disassembly more convenient. The fixed station 41 is used to install the gas metering instrument to be verified. The flow adjusting device, temperature and pressure compensating instrument and front and rear straight pipe sections (not shown in the drawing) are arranged in the metering pipeline of the fixed station 41. The straight pipe section of the fixed station 41 is arranged according to the shortest straight pipe section 20D, and the straight pipe section 5D is arranged, and the first telescopic compensator 42 is arranged downstream of the straight pipe section to compensate for the length of the pipe.

[0037] In an embodiment, the first measuring unit 21 further comprises a first flow adjusting device 223 and a second telescopic compensator 224 in communication with the first conduit 221, and the first standard verification member 211 is located between the first flow adjusting device 223 and the second telescopic compensator 224. Optionally, the first flow adjusting device 223 is used to improve the stability of the flow state of the gas medium, and a plurality of air holes are arranged in the first flow adjusting device 223. After the gas passes through the air holes, the gas distribution is more uniform, which can ensure the measurement accuracy. The second telescopic compensator 224 can extend or retract the length of the telescopic compensator itself, so that it is more convenient to disassemble the flow meter.

[0038] In an embodiment, the device further comprises a component analysis unit 6 and an automatic emptying unit 7. The component analysis unit 6 is connected between the thermal cycle assembly 1 and the first pipeline unit 22, and the automatic emptying unit 7 is connected to the first pipeline unit 22. The component analysis unit 6 can analyze the natural gas medium components, provide gas component parameters for the calculated metering calibration structure, facilitate the measurement of natural gas volume, and calculate the volume. The automatic emptying unit 7 automatically empties all gas in the pipeline of the calibration device in an emergency to ensure the safety of the on-site device and on-site operators. The component analysis unit 6 is used to analyze the natural gas medium components to provide gas component parameters for the calculated metering calibration structure. The component analysis unit 6 uses an online gas chromatograph component analyzer integrated in the analysis cabinet to continuously provide the pipeline natural gas medium components for volume metering calculation for the flowmeter. The high-pressure loop natural gas flowmeter calibration device does not trigger the interlock automatic emptying unit 7 during normal calibration operation. Only when an emergency occurs on site, such as natural gas leakage, fire, or other events, will the automatic emptying unit 7 be automatically triggered for emergency emptying to ensure the safety of the on-site device and on-site operators.

[0039] In an embodiment, the device, the first standard calibration unit 211 and the second standard calibration unit 212 are used for online calibration of the submitted gas metering instrument. The standard tables of the first standard calibration unit 211 and the second standard calibration unit 212 use gas turbine flowmeters with an accuracy of ±0.20% as standard devices for online calibration of different caliber gas metering instruments. The working level measurement standard device is set according to the detection needs, with 6 DN(outer diameter)200 and 1 DN(outer diameter)100 caliber standard tables. The calibration computer system will automatically switch and open the corresponding number of loop standard devices on the pipeline to meet the calibration needs according to the corresponding detection flow. The working level measurement standard device configuration according to the caliber of the detected flowmeter is shown in the following table:

[0040]

[0041] The first secondary calibration unit 315 and the second secondary calibration unit 316 are used for periodic calibration of the first standard calibration unit 211 and the second standard calibration unit 212. The standard tables of the first secondary calibration unit 315 and the second secondary calibration unit 316 use gas turbine flowmeters with an accuracy of ±0.20% as standard devices for periodic calibration of the standard tables of the first standard calibration unit 211 and the second standard calibration unit 212 to ensure the calibration accuracy of the first standard calibration unit 211 and the second standard calibration unit 212. The first secondary calibration unit 315 and the second secondary calibration unit 316 are set according to the calibration needs, with 4 DN(outer diameter)100 and 1 DN(outer diameter)50 standard tables. The secondary measurement standard device configuration according to the caliber of the detected flowmeter is shown in the following table:

[0042]

[0043] The high-pressure explosion-proof blower is used to provide the circulation power of the natural gas medium in the pipeline, and the built-in flow regulation function is used to control the flow, and the overall regulation accuracy is better than ±0.5%. The purpose of flow regulation is to ensure the control of the calibration gas volume during calibration. The temperature control device 122 is configured to adjust the temperature of the natural gas medium, and ensure that the temperature of the natural gas medium in the metering pipeline is stable at 20°C.

[0044] In order to ensure the accuracy during calibration, the gas ultrasonic flowmeter with an accuracy of ±0.5% is set to check the metering process, that is, the first checking device 5, to ensure the reliability of the test results, and a one-to-one checking method is used; the first checking device 313 and the second checking device 314 use a one-to-many checking method. There are 6 checking flowmeters in total, 1 DN50 (using a waist wheel flowmeter), 4 DN100 (ultrasonic flowmeters), and 1 DN500 (ultrasonic flowmeter).

[0045] The test process under normal working condition is as follows: when it is necessary to use the device for testing, the natural gas can be filled into the high-pressure ring through the inlet valve group from the storage tank or the booster pipeline connected to the high-pressure natural gas pipeline, the inlet cutoff valve is closed after the pressure of the flowmeter reaches the required calibration pressure, the natural gas flow is adjusted to the required flow point through the heat circulation assembly 1, and the natural gas temperature is adjusted to the required test temperature and stabilized, and then the flowmeter is tested through the first measuring unit 21 and the second measuring unit 31, and the test data acquisition and processing is started.

[0046] Although the present application is described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-pressure loop natural gas flowmeter calibration device, characterized in that: include: Thermal cycle assembly (1); A first measurement assembly (2) comprising a first measurement unit (21) and a first pipe unit (22) in communication, wherein the thermal cycle assembly (1) is in communication with the first pipe unit (22); a second measuring assembly (3), comprising a second measuring unit (31) and a second pipe unit (32) in communication, wherein the thermal cycle assembly (1) and the second pipe unit (32) are in communication, and when the first pipe unit (22) and the second pipe unit (32) are in communication, the first measuring unit (21) is verified; An inspection component (4), one end of which is in communication with the first pipeline unit (22) or the second pipeline unit (32); The first verification component (5) is connected to the other end of the inspection component (4) to verify whether the flow meter thereon is accurate. The first verification component (5) is connected to the other end of the thermal cycle component (1).

2. The high-pressure loop natural gas flowmeter calibration device according to claim 1, characterized in that: The thermal cycle assembly (1) comprises a high-pressure cycle component (11) and a temperature control unit (12) which are arranged in sequence, the high-pressure cycle component (11) and the temperature control unit (12) are in communication, and the temperature control unit (12) is in communication with the first pipe unit (22) and / or the second pipe unit (32).

3. The high-pressure loop natural gas flowmeter calibration device according to claim 2, characterized in that: The temperature control unit (12) comprises a heat source component (121) and a temperature control component (122) connected to each other, the heat source component (121) is in communication with the first pipe unit (22) and / or the second pipe unit (32), the heat source component (121) is in communication with the high-pressure circulation component (11), and the temperature control component (122) is connected to the heat source component (121).

4. The high-pressure loop natural gas flowmeter calibration device according to claim 1, characterized in that: The first pipe unit (22) comprises a first conduit (221) and a second conduit (222); one end of the first conduit (221) and the second conduit (222) are in communication with the thermal cycle assembly (1); and the other ends are in communication with the second pipe unit (32) and / or the inspection assembly (4); the first measuring unit (21) is arranged on the first conduit (221) and the second conduit (222); wherein the first conduit (221) and the second conduit (222) are in communication with the inspection assembly (4) via a first oil pipe (A).

5. The high-pressure loop natural gas flowmeter calibration device according to claim 4, characterized in that: The first measuring unit (21) comprises a first standard calibration piece (211) and a second standard calibration piece (212); the first standard calibration piece (211) is arranged on and connected to the first conduit (221); and the second standard calibration piece (212) is arranged on and connected to the second conduit (222).

6. The high-pressure loop natural gas flowmeter calibration device according to claim 1, characterized in that: The second pipe unit (32) comprises a first pipe (321) and a second pipe (322); when the thermal cycle component (1) is connected to the first pipe (321) and the second pipe (322) respectively through the second oil pipe (B), the connection channel between the second oil pipe (B) and the first pipe unit (22) is closed, the first pipe (321) and the second pipe (322) are connected to the inspection component (4) respectively, and the second measuring unit (31) is provided and connected to the first pipe (321) and the second pipe (322); When the first pipe (321) and the second pipe (322) are respectively connected to the first pipeline unit (22), the connection channel between the second oil pipe (B) and the first pipeline unit (22) is opened to verify the first measuring unit (21).

7. The high-pressure loop natural gas flowmeter calibration device according to claim 6, characterized in that: The second measuring unit (31) comprises a first adjusting part (311), a second adjusting part (312), a first checking part (313), a second checking part (314), a first secondary checking part (315) and a second secondary checking part (316); the first adjusting part (311), the first checking part (313) and the first secondary checking part (315) are arranged at intervals and are connected to the first pipe (321); the second adjusting part (312), the second checking part (314) and the second secondary checking part (316) are arranged at intervals and are connected to the second pipe (322).

8. The high-pressure loop natural gas flowmeter calibration device according to claim 1, characterized in that: The inspection component (4) includes a fixing table (41) for setting a flow meter and a first telescopic compensator (42), the flow meter is respectively connected to the first pipe unit (22) and the first pipe unit (22), the flow meter is connected to the first telescopic compensator (42), the first telescopic compensator (42) is connected to the first approval part (5), and the flow meter is used to compare with the first measuring unit (21) or the second measuring unit (31) to determine whether the flow meter is accurate.

9. The high-pressure loop natural gas flowmeter calibration device according to claim 5, characterized in that: The first measuring unit (21) further comprises a first flow regulator (223) and a second telescopic compensator (224) in communication with the first conduit (221), and the first standard calibration piece (211) is located between the first flow regulator (223) and the second telescopic compensator (224).

10. The high-pressure loop natural gas flowmeter calibration device according to claim 1, characterized in that: It also includes a component analysis component (6) and an automatic venting component (7), wherein the component analysis component (6) is connected between the thermal cycle component (1) and the first pipeline unit (22), and the automatic venting component (7) is connected to the first pipeline unit (22).

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