CN203837782U - Diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature - Google Patents
Diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature Download PDFInfo
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- CN203837782U CN203837782U CN201420217494.4U CN201420217494U CN203837782U CN 203837782 U CN203837782 U CN 203837782U CN 201420217494 U CN201420217494 U CN 201420217494U CN 203837782 U CN203837782 U CN 203837782U
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- 238000009434 installation Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 83
- 238000012360 testing method Methods 0.000 description 6
- 238000012795 verification Methods 0.000 description 5
- 230000001746 atrial effect Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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Abstract
The utility model provides a diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature, and relates to the field of gas meters. The diaphragm gas meter metering performance isothermal calibrating apparatus comprises a sealed temperature control box, a plurality of calibrated gas meters connected in series and a critical flow venturi nozzle segment which are arranged in the temperature control box; wherein the first calibrated gas meter is connected with a gas inlet pipe which is communicated with the temperature control box, the last calibrated gas meter is connected with a Roots flow meter, the Roots flow meter is connected with the critical flow venturi nozzle segment, and the critical flow venturi nozzle segment is connected with a vacuum pump. The utility model solves the technical problem that accuracy of the diaphragm gas meter metering performance isothermal calibrating apparatus under the conditions of limiting temperature in the prior art cannot be verified. The diaphragm gas meter metering performance isothermal calibrating apparatus of the utility model has the beneficial effects that: the high-accuracy critical flow venturi nozzle segment is adopted to calibrate the metering performance of the calibrated gas meter under conditions of limiting temperature, and the Roots flow meter which is little influenced by the temperature is used to verify a nozzle discharge coefficient and the accuracy of the calibrating apparatus, thereby ensuring accuracy of calibrating data.
Description
Technical field
The utility model relates to gas meter, flow meter technical field, especially relates to the device of metering performance isothermal method calibrating under a kind of diaphragm gas meter ultimate temperature.
Background technology
Gas meter, flow meter is as the main measurement instrument of gas energy metering, in the enormous amount of China's various places use.Diaphragm gas meter is because it is with low cost, and the feature such as stable performance and range ratio are wide, is widely applied in gas metering field.From China's national situation, wide to southern region from the north, circumstance complication, the temperature difference are very big.Because exerting an influence, epithelium, rubber parts, working of plastics and other parts to temperature variation sensitivity of variation of ambient temperature to diaphragm gas meter can cause error in dipping.The GB/T 6968-2011 " diaphragm gas meter " of new promulgation of in May, 2012, the minimum operating ambient temperature range of gas meter, flow meter is defined as to-10 DEG C ~+40 DEG C, adapt to actuating medium range of temperature and be not less than 40 DEG C, minimum reserve temperature range is-20 DEG C ~+60 DEG C.According to JJF 1354-2005 " diaphragm gas meter type evaluation outline " requirement, the test condition under non-reference condition is the temperature within the scope of 5 DEG C of, maximum operating temperatures minimum from gas meter, flow meter.Between tested table left and right sides temperature, environment temperature, standard temperature, be certain to variantly, can not exceed 1 DEG C according to inspection rule, otherwise will produce considerable influence to error.According to these regulations, under ultimate temperature (25 DEG C ~ 55 DEG C) condition, the best solution of calibrating diaphragm gas meter metering performance is: by tested gas meter, flow meter, medium---air is stored in the detection case of same environment temperature, after ultimate temperature balance, examines and determine again with calibrating.Chinese patent Granted publication CN202255571U, on May 30 2012 Granted publication day, name is called the utility model of " Venturi nozzle type high/low-temperature fuel gas representation value error detecting device with critical flow ", and disclosed is exactly a kind of method wherein.It comprises expansion bracket, pallet, camera head, vacuum pump, sonic nozzle, gas meter, flow meter draft tube, gas meter, flow meter escape pipe and computer system; Vacuum pump is connected with sonic nozzle by pipeline I, and sonic nozzle is connected with gas meter, flow meter escape pipe by pipeline II; Pallet is fixedly mounted on expansion bracket, and when detected gas meter, flow meter is placed on pallet, the camera lens of camera head is corresponding with the indicating value display window of detected gas meter, flow meter; Pipeline II is provided with temperature sensor Ts, in pipeline II, is provided with pressure transducer Ps near sonic nozzle, is provided with temperature sensor Tm and pressure transducer Pm in gas meter, flow meter draft tube; Pressure transducer Ps, temperature sensor Ts, pressure transducer Pm, temperature sensor Tm are connected with computer system by temperature, pressure acquisition system, and camera head is connected with computer system by video device.This device utilizes the air in GDJS make medium and tested gas meter, flow meter, sonic nozzle are placed on together in this chamber and are circulated, and has guaranteed that medium, tested gas meter, flow meter and calibrating measurement instrument are same temperatures.Within the identical time interval, it is critical flow venturi nozzle and tested gas meter, flow meter that gas continuous stream is crossed sonic nozzle, according to law of conservation of mass, mass rate by critical flow venturi nozzle and tested gas meter, flow meter is identical, as long as more two flow indicating values can be determined to the error of indication of tested gas meter, flow meter.But there is following problem: critical flow venturi nozzle generalized case is demarcated in 20 DEG C of situations of reference temperature, under ultimate temperature, not only critical flow venturi nozzle throat diameter changes, aerodynamic force viscosity also changes simultaneously, and this just need to revise efflux coefficient.Also need simultaneously to revised efflux coefficient whether the accuracy of science and package unit effectively verify, so just can guarantee science, the accuracy of verification result.Under ultimate temperature condition, the efflux coefficient of nozzle revised and cannot be carried out effectively verifying and having significant deficiency for pick-up unit to checking verification result, can cause verification result not conform to the actual conditions.
Summary of the invention
In order to solve the technical matters that in prior art, the diaphragm gas meter metering performance isothermal verification result under ultimate temperature condition cannot be verified, the utility model provides the calibrating installation of the diaphragm gas meter metering performance isothermal under a kind of ultimate temperature condition, whether science, package unit be accurate can to verify calibrating ultimate temperature condition critical flow venturi nozzle efflux coefficient environment, to reach the reliable object of calibrating data.
The technical solution of the utility model is: the diaphragm gas meter metering performance isothermal calibrating installation under a kind of ultimate temperature condition, it comprises the temperature control box of sealing, be arranged on several tested gas meter, flow meters and critical flow venturi nozzle group in temperature control box, tested gas meter, flow meter is connected by connecting pipe, first tested gas meter, flow meter is connected with draft tube, draft tube is communicated with temperature control box, last tested gas meter, flow meter is connected with Roots type flowmeter, Roots type flowmeter is connected with critical flow venturi nozzle group, and critical flow venturi nozzle group is connected with vacuum pump.Using the air in temperature control box as detecting medium, tested gas meter, flow meter, critical flow venturi nozzle group and Roots type flowmeter are in temperature control box inside together, and testing environment is identical.Adopt high-precision critical flow venturi nozzle group to examine and determine tested gas meter, flow meter error in dipping, carry out the accuracy of demo plant with the minimum Roots type flowmeter of temperature influence, guarantee that verification result accurately, reliably.
As preferably, between the air intake opening of tested gas meter, flow meter and gas outlet, be parallel with differential pressure transmitter; Every tested gas meter, flow meter is all installed differential pressure transmitter, under ultimate temperature, test out the pressure loss of tested gas meter, flow meter simultaneously, contribute to analyze the motion of gas meter, flow meter internal mechanical whether smooth, stable, provide fundamental basis for improving better parts, structure and overall performance.
As preferably, critical flow venturi nozzle group is made up of the critical flow venturi nozzle parallel combination of several different flows; The critical flow venturi nozzle of different flow, can combine mutually, forms many group test traffics, flexible and convenient to use.
As preferably, in temperature control box, be provided with data acquisition unit, be provided with camera with tested gas meter, flow meter correspondence position, camera is electrically connected with data acquisition unit, data acquisition unit is electrically connected with the computer control being arranged on outside temperature control box, and the data that tested gas meter, flow meter is shown upload to computing machine in time.
Compared with prior art, the beneficial effects of the utility model are: using the air in temperature control box as detecting medium, measurement standard is in temperature control box inside together together with tested gas meter, flow meter, and testing environment is identical.Adopt high-precision critical flow venturi nozzle group to examine and determine tested gas meter, flow meter error in dipping, whether science, package unit be accurate to verify ultimate temperature condition lower critical stream Venturi nozzle efflux coefficient environment with the minimum Roots type flowmeter of temperature influence, to guarantee to examine and determine the accuracy of data.
Brief description of the drawings
Accompanying drawing 1 is connection diagram of the present utility model.
In figure: 1-temperature control box; The tested gas meter, flow meter of 2-; 3-data acquisition unit; 4-differential pressure transmitter; 5-Roots type flowmeter; 6-critical flow venturi nozzle group; 7-vacuum pump; 11-draft tube; 31-camera; 32-display window.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1:
As shown in Figure 1, the diaphragm gas meter metering performance isothermal calibrating installation under a kind of ultimate temperature condition, it comprises and the temperature control box 1 of sealing is arranged on several tested gas meter, flow meter 2 and critical flow venturi nozzle groups 6 in temperature control box 1.Temperature control box 1 is provided with interlayer, filling heat insulator in interlayer.The closed container that temperature control box 1 is walk-in type, be provided with can switch door.In the present embodiment temperature control box 1, be provided with six tested dial frameworks, on tested dial framework, be fixed with tested gas meter, flow meter 2.Tested gas meter, flow meter 2 is connected by connecting pipe.The gas outlet of first tested gas meter, flow meter 2 is connected with the air intake opening of second tested gas meter, flow meter 2 by connecting pipe, and the gas outlet of second tested gas meter, flow meter 2 is connected with the air intake opening of the 3rd tested gas meter, flow meter 2 by connecting pipe, by that analogy.First tested gas meter, flow meter 2 is connected with draft tube 11, and draft tube 11 is communicated with temperature control box 1, and first tested gas meter, flow meter 2 air intake openings connect draft tube 11.The 6th tested gas meter, flow meter 2 is connected with Roots type flowmeter 5, and Roots type flowmeter 5 is connected with critical flow venturi nozzle group 6.One end of Roots type flowmeter 5 is connected by connecting pipe with the gas outlet of the 6th tested gas meter, flow meter 2, and the other end of Roots type flowmeter 5 is connected with the inlet end of critical flow venturi nozzle group 6 by connecting pipe.Critical flow venturi nozzle group 6 is made up of the critical flow venturi nozzle parallel combination of several different flows.The nozzle that critical flow venturi nozzle group 6 contains 12 different flows, the nozzle of different flow can combine mutually.Critical flow venturi nozzle group 6 is connected with vacuum pump 7.Vacuum pump 7 is located at the outside of temperature control box 1, and vacuum pump 7 is communicated with the outlet side of critical flow venturi nozzle group 6 by connecting pipe.Between the air intake opening of tested gas meter, flow meter 2 and gas outlet, be parallel with differential pressure transmitter 4.Six tested gas meter, flow meters 2 are furnished with six differential pressure transmitters 4.The connecting pipe parallel connection that one end of each differential pressure transmitter 4 is connected with the air intake opening of each tested gas meter, flow meter 2, the connecting pipe parallel connection that the other end is connected with the gas outlet of this tested gas meter, flow meter 2.In temperature control box 1, be provided with data acquisition unit 3, the outer computer control (not shown) that is provided with of temperature control box 2.Data acquisition unit 3 is electrically connected with computer control by data line.Tested gas meter, flow meter 2 correspondence positions are provided with camera 31, and camera 31 is aimed at the digital display window of tested gas meter, flow meter 2.Camera 31 is electrically connected with data acquisition unit 3.Critical flow venturi nozzle group 6 outlet sides are connected with pressure transducer Psb after nozzle, critical flow venturi nozzle group 6 inlet ends are connected with stagnation temperature sensor Tsa and stagnation pressure sensor Psa, and after nozzle, the output terminal of pressure transducer Psb, stagnation temperature sensor Tsa and stagnation pressure sensor Psa is electrically connected with data acquisition unit 3 by data line.Near being connected with left side pressure transducer Pma and left side temperature sensor Tma near the air intake opening of first tested gas meter, flow meter 2.Near the gas outlet of Roots type flowmeter 5, be connected with right atrial pressure sensor Pmb and right side temperature sensor Tmb.The output terminal of left side pressure transducer Pma, left side temperature sensor Tma, right atrial pressure sensor Pmb and right side temperature sensor Tmb is electrically connected with data acquisition unit 3 by data line.Near draft tube 11 air intake openings, be provided with barometric pressure sensor P, the output terminal of barometric pressure sensor P is connected with data acquisition unit 3 by data line.
Six tested gas meter, flow meters 2 are transported in temperature control box 1 by the door of temperature control box 1, and are fixed on above tested dial framework.Tested gas meter, flow meter 2 is connected with connecting pipe.Draft tube 11 is connected with the air intake opening of first tested gas meter, flow meter 2, and Roots type flowmeter 5 is connected with the 6th tested gas meter, flow meter 2.Roots type flowmeter 5 gas outlets are communicated with the inlet end of critical flow venturi nozzle group 6.Close the door of temperature control box 1.The interior heating of temperature control box 1, treats that the interior air of temperature control box 1, tested gas meter, flow meter 2, Roots type flowmeter 5 and critical flow venturi nozzle group 6 reach balance, starts test.Open vacuum pump 7 and aspirate air, within the identical time interval, gas continuous stream is crossed tested gas meter, flow meter 2, Roots type flowmeter 5 and critical flow venturi nozzle group 6.According to law of conservation of mass, identical with the mass rate of critical flow venturi nozzle group 6 by tested gas meter, flow meter 2, Roots type flowmeter 5.Computer control passes to data acquisition unit 3 by communication port whole process is controlled.Data acquisition unit 3 is delivered to computer control pressure transducer Psb, stagnation temperature sensor Tsa, stagnation pressure sensor Psa, left side pressure transducer Pma, left side temperature sensor Tma, right atrial pressure sensor Pmb, right side temperature sensor Tmb and barometric pressure sensor P equitemperature pressure parameter after the nozzle collecting by data acquisition unit 3.Data acquisition unit 3 reads tested gas meter, flow meter 2 information camera 31 and delivers to computer control.According to stagnation temperature sensor Tsa and stagnation pressure sensor Psa, the efflux coefficient of pressure transducer Psb and critical flow venturi nozzle group 6 after nozzle, can calculate tested gas meter, flow meter 2 flows, then compare with the flow value that tested gas meter, flow meter 2 shows the error of indication that can determine tested gas meter, flow meter 2.
Claims (4)
1. the diaphragm gas meter metering performance isothermal calibrating installation under a ultimate temperature condition, it comprises the temperature control box (1) of sealing, be arranged on several tested gas meter, flow meters (2) and critical flow venturi nozzle group (6) in temperature control box (1), it is characterized in that: tested gas meter, flow meter (2) is connected by connecting pipe, first tested gas meter, flow meter (2) is connected with draft tube (11), draft tube (11) is communicated with temperature control box (1), last tested gas meter, flow meter (2) is connected with Roots type flowmeter (5), Roots type flowmeter (5) is connected with critical flow venturi nozzle group (6), critical flow venturi nozzle group (6) is connected with vacuum pump (7).
2. the diaphragm gas meter metering performance isothermal calibrating installation under ultimate temperature condition according to claim 1, is characterized in that: between the air intake opening of described tested gas meter, flow meter (2) and gas outlet, be parallel with differential pressure transmitter (4).
3. the diaphragm gas meter metering performance isothermal calibrating installation under ultimate temperature condition according to claim 1, is characterized in that: described critical flow venturi nozzle group (6) is made up of the critical flow venturi nozzle parallel combination of several different flows.
4. the diaphragm gas meter metering performance isothermal calibrating installation under ultimate temperature condition according to claim 1, it is characterized in that: in described temperature control box (1), be provided with data acquisition unit (3), be provided with camera (31) with tested gas meter, flow meter (2) correspondence position, camera (31) is electrically connected with data acquisition unit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217494.4U CN203837782U (en) | 2014-04-30 | 2014-04-30 | Diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature |
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| CN201420217494.4U CN203837782U (en) | 2014-04-30 | 2014-04-30 | Diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature |
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| CN203837782U true CN203837782U (en) | 2014-09-17 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390679A (en) * | 2014-10-27 | 2015-03-04 | 中国科学院力学研究所 | Device for calibrating quality flow exceeding allowable temperature of reference flowmeter and method adopting device |
| CN106338322A (en) * | 2016-08-31 | 2017-01-18 | 金卡高科技股份有限公司 | System and method for detecting active two-way work gas solid flow |
| CN106768201A (en) * | 2016-12-27 | 2017-05-31 | 新乡航空工业(集团)有限公司 | Positive/negative-pressure plurality of nozzle-type flowmeter detecting system |
| CN106989802A (en) * | 2017-05-22 | 2017-07-28 | 中国测试技术研究院流量研究所 | A kind of device for improving the cryogenic liquid gauge check degree of accuracy |
| CN107860443A (en) * | 2017-12-12 | 2018-03-30 | 杭州天马计量科技有限公司 | Air pulsing flow standard experimental rig |
| CN109960236A (en) * | 2017-12-25 | 2019-07-02 | 新智数字科技有限公司 | The test method and system of gas meter controller |
| CN112013928A (en) * | 2020-08-27 | 2020-12-01 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Gas meter temperature/pressure adaptability integrated detection device and method |
-
2014
- 2014-04-30 CN CN201420217494.4U patent/CN203837782U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390679A (en) * | 2014-10-27 | 2015-03-04 | 中国科学院力学研究所 | Device for calibrating quality flow exceeding allowable temperature of reference flowmeter and method adopting device |
| CN104390679B (en) * | 2014-10-27 | 2017-10-31 | 中国科学院力学研究所 | A kind of mass flow caliberating device and method beyond reference stream gauge allowable temperature |
| CN106338322A (en) * | 2016-08-31 | 2017-01-18 | 金卡高科技股份有限公司 | System and method for detecting active two-way work gas solid flow |
| CN106338322B (en) * | 2016-08-31 | 2019-05-21 | 金卡智能集团股份有限公司 | A kind of the gas reality stream detection system and method for active two-way operation |
| CN106768201A (en) * | 2016-12-27 | 2017-05-31 | 新乡航空工业(集团)有限公司 | Positive/negative-pressure plurality of nozzle-type flowmeter detecting system |
| CN106768201B (en) * | 2016-12-27 | 2023-05-23 | 新乡航空工业(集团)有限公司 | Positive-negative pressure multi-nozzle flowmeter detection system |
| CN106989802A (en) * | 2017-05-22 | 2017-07-28 | 中国测试技术研究院流量研究所 | A kind of device for improving the cryogenic liquid gauge check degree of accuracy |
| CN106989802B (en) * | 2017-05-22 | 2023-08-11 | 中国测试技术研究院流量研究所 | Device for improving metering and detecting accuracy of low-temperature liquid |
| CN107860443A (en) * | 2017-12-12 | 2018-03-30 | 杭州天马计量科技有限公司 | Air pulsing flow standard experimental rig |
| CN107860443B (en) * | 2017-12-12 | 2024-02-02 | 杭州天马计量科技有限公司 | Standard test device for gas pulsating flow |
| CN109960236A (en) * | 2017-12-25 | 2019-07-02 | 新智数字科技有限公司 | The test method and system of gas meter controller |
| CN112013928A (en) * | 2020-08-27 | 2020-12-01 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Gas meter temperature/pressure adaptability integrated detection device and method |
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| GR01 | Patent grant | ||
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Address after: 325600 Yueqing Economic Development Zone, Wenzhou, No. seventeen weft Road No. 291, Zhejiang Co-patentee after: HANGZHOU GUKA INTELLIGENT SYSTEM Co.,Ltd. Patentee after: Goldcard Smart Group Co.,Ltd. Co-patentee after: ZHEJIANG MEASUREMENT SCIENCE Research Institute Address before: 325600 Yueqing Economic Development Zone, Wenzhou, No. seventeen weft Road No. 261, Zhejiang Co-patentee before: HANGZHOU GUKA INTELLIGENT SYSTEM Co.,Ltd. Patentee before: GOLDCARD HIGH-TECH CO.,LTD. Co-patentee before: ZHEJIANG MEASUREMENT SCIENCE Research Institute |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |
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| CX01 | Expiry of patent term |