Natural gas high-flow real flow verification system

A technology of large flow and natural gas, applied in the field of large flow real-flow verification system of natural gas, can solve the problems of low measurement uncertainty of the system, inability to accurately verify small flow, and large capacity of the verification pipeline, so as to improve the measurement uncertainty of the system. The effect of improving the speed, verification function, and simplifying the setting of the retractor

Pending Publication Date: 2018-05-08
XIAN CHANGQING TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The traditional natural gas large-flow real-flow verification system has a small verification range and cannot accurately verify small flows. The number of pipelines and forced-seal ball valves in the system is large, which makes the cost of the entire system very high. The capacity of the verification pipeline Larger, making the system measurement uncertainty lower during verification

Method used

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Embodiment 1

[0033] This embodiment provides a natural gas large flow real flow verification system, such as figure 1As shown, it includes an air inlet 1, a filter separation device 2, a pressure regulating valve group 3, a bypass flow regulating valve group 11 and an exhaust port 20 connected in sequence, including between the air inlet 1 and the exhaust port 20 The over-station regulating valve group 4 includes a verification station 6, a high-precision verification station 7, a working level standard device 5, a secondary standard device 9, a main flow regulating valve group 10 and a mobile verification vehicle interface, which is characterized in that: In addition to being connected with the bypass flow regulating valve group 11, the lower end of the pressure-stabilizing regulating valve group 3 is also connected with a working-level standard device 5 and a high-precision verification platform 7 respectively, and the working-level standard device 5 includes 4 parallel sets The turbine...

Embodiment 2

[0054] In this embodiment, on the basis of Embodiment 1, the described work-level standard device 5 is specifically described, as figure 1 The diameter of 3 of the 4 turbine flowmeters 14 of the working level standard device 5 is 250mm, the diameter of 1 is 150mm, the diameter of 1 waist wheel flowmeter 15 is 100mm, the turbine flowmeter 14 and An ordinary electric valve 16 is provided between the first manifold 191 at the upper end, a forced sealing ball valve 17 is provided between the turbine flowmeter 14 and the first manifold 191 at the lower end, and the upper end of the working standard device 5 is first A nitrogen purge pipeline 12 is provided on the manifold 191 , and a venting pipeline 13 is provided on the first manifold 191 at the lower end.

[0055] Such as figure 2 , the working-level standard device 5 in the traditional natural gas large-flow real-flow verification system generally uses the turbine flowmeter 14 as the working-level standard meter, but the smal...

Embodiment 3

[0059] In this embodiment, on the basis of Embodiment 1, the secondary standard device 9 is described in detail, as figure 1 As shown, the secondary standard device 9 includes a critical flow Venturi nozzle 18, a third manifold 193 and a fourth manifold 194 at the upper end and a fifth manifold 195 at the lower end, and the lower end of the third manifold 193 is provided with 4 The critical flow Venturi nozzles 18 that are arranged side by side, the lower end of the fourth manifold 194 can be provided with 11 parallel critical flow Venturi nozzles 18, and the lower ends of all the critical flow Venturi nozzles 18 are connected to the fifth manifold 195; The first inlet 9-1 of the secondary standard device and the second inlet 9-2 of the secondary standard device are arranged on the third manifold 193, and the third inlet 9-3 of the secondary standard device is arranged on the fourth manifold 194 superior.

[0060] The diameter of the 4-way critical flow Venturi nozzle 18 con...

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Abstract

The invention discloses a natural gas high-flow real flow verification system. The system comprises a gas inlet, a filtering separation device, a pressure stabilizing control valve group, a bypass flow control valve group and an exhaust port. The bypass flow control valve group, an operating level standard device and a high-precision verification station are connected to the lower end of the pressure stabilizing control valve group. The operating level standard device comprises four turbines and a roots flowmeter, manifolds are arranged at upper and lower ends of the four turbines, the roots flowmeter is independently arranged outside the manifolds, and the operating level standard device can be connected with either the verification station or a secondary standard device with three inlets. A first inlet of the secondary standard device is connected with the operating level standard device and the high-precision verification station, a second inlet and a third inlet of the secondary standard device are connected with the verification station, and lower ends of the verification state and the secondary standard device can be both connected with a main flow control valve group. By adoption of the optimized verification system, a verification process is flexible and diversified, and verification functions are perfected.

Description

technical field [0001] The invention belongs to a real flow verification process system, in particular to a natural gas large flow real flow verification system. Background technique [0002] At present, the domestic large-flow real-flow verification process system of natural gas has formed a relatively mature typical model, such as figure 2 As shown, it mainly includes the air inlet, filtration and separation device, steady pressure regulating valve group, over station regulating valve group, main flow regulating valve group, bypass flow regulating valve group, traditional verification station, high precision verification station, Traditional working-level standard devices, traditional secondary standard devices, traditional mobile calibration vehicle interfaces and exhaust ports, and nitrogen purge and vent lines, etc. [0003] The traditional work-level standard device is composed of turbine flowmeters (different flow ranges). The upper and lower ends of each road are eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00
CPCG01F25/15
Inventor 姚欣伟任晓峰王登海孙志鹏吴宝祥刘明堃王东白岩张昆白东丰
Owner XIAN CHANGQING TECH ENG
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