CN104180861A - Standard device and measuring method using mass method for detecting high-pressure gas filling flow - Google Patents
Standard device and measuring method using mass method for detecting high-pressure gas filling flow Download PDFInfo
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- CN104180861A CN104180861A CN201410457531.3A CN201410457531A CN104180861A CN 104180861 A CN104180861 A CN 104180861A CN 201410457531 A CN201410457531 A CN 201410457531A CN 104180861 A CN104180861 A CN 104180861A
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Abstract
The invention discloses a standard device using a mass method for detecting high-pressure gas filling flow. The device comprises multiple high-pressure gas cylinder sets, an electronic balance and a lifting device. All the high-pressure gas cylinder sets are connected together through gas pipes, the lifting device is used for ascending or descending the high-pressure gas cylinder sets integrally, and gas cylinder valves, precision pressure gauges and flow indicating instruments are further arranged on the gas pipes. The lifting device comprises a loading trolley, multiple hydraulic oil cylinders arranged at the bottom of the loading trolley, needle valves which can adjust the hydraulic oil amount, a three-way directional control valve and an oil pump. The standard device judges whether a detected object meets standard requirements or not through comparing the mass difference of weighing the high-pressure gas cylinder sets via the electronic balance with the indicating value of the detected object, the flow range is wider, metering accuracy is higher, and measurement repeatability is better. The standard device can be respectively connected with a CNG dispenser, a CNG dispenser calibrating device and a high-pressure gas flow meter for measurement detection.
Description
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technical field
The present invention relates to a kind of high-pressure gas flow meter amount field, particularly a kind of standard set-up and measuring method of utilizing mass method detection gases at high pressure to fill flow.
Background technology
According to the regulation of country's " measurement Law ", should include mandatory administration scope in for the high-pressure gas flow meter amount instrument/device that relates to trade settlement and security protection in accordance with the law, must carry out compulsory verification and periodic calibration first, to judge whether it meets the measurement standard that GB requires, so that the accurate measurement of guarantee high-pressure gas flow meter amount instrument, reliable.But there are the following problems for high-pressure gas flow meter amount context of detection at present:
1. the metering of high-pressure gas flow meter measuring appratus instrument detects and lacks technical equipment
At present, various types of high-pressure gas flow meter measuring appratus instrument are used widely in the links such as the construction of natural gas fields, production, conveying, storage, circulation, distribution, handing-over, monitoring, clearing, and its quantity is quite huge.But, owing to lacking essential high-pressure gas flow meter amount standard set-up technological means, the calibrating, the calibration great majority that gases at high pressure mass flowmeter etc. are related to the high-pressure gas flow meter amount instrument of trade settlement and security protection adopt water to replace gases at high pressure matching standard table method to carry out test stone.Experiment shows, because calibrating is different with service condition, and the medium difference that particularly used, the impact of water and gaseous exchange amount meter error is different.For example, water is real fails to be sold at auction that to determine high pressure mass flowmeter error be 0.2%, and for gas medium timing signal, its error may just exceed 0.5%, therefore high pressure mass flowmeter is adopted to pressurized air and demarcates more realistic condition of work than adopting water.
2. the metering of compressed natural gas (Compressed Natural Gas is called for short CNG) filling machine detects and lacks technical equipment
Compressed natural gas as clean energy resource has been widely used as motor vehicle fuel, but the construction of CNG Filling Station still lags behind the development of gas-fueled vehicles, and especially the metering of autoamtic compressed gas filling machine detects the development that seriously lags behind gas-fueled vehicles.
Therefore, set up high-pressure gas flow meter amount calibrating installation and CNG filling machine test stone device, can be described as the task of top priority of current high-pressure gas flow meter amount work, not only can meet the at present domestic needs to the calibrating of high-pressure gas flow meter amount, for the accurate-metering of clean energy resource provides reliable pick-up unit, and for the fair and just metering of international rock gas trade settlement provides strong detection means, simultaneously also for water, gas provide reliable research means to the impact of high-pressure flowmeter, CNG filling machine error.
Summary of the invention
The object of the invention is to overcome in prior art the metering detection of existing high-pressure gas flow meter measuring appratus instrument and the metering of autoamtic compressed gas filling machine, to detect the error in dipping that adopts traditional water detection method to cause larger, lack again the above-mentioned deficiency of other relevant detection technique equipments simultaneously, a kind of standard set-up that utilizes mass method detection gases at high pressure to fill flow is provided.
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of standard set-up that utilizes mass method detection gases at high pressure to fill flow, comprise several high-pressured air cylinder groups, electronic balance and jacking gear, all described high-pressured air cylinder groups link together by tracheae, described jacking gear, for by described high-pressured air cylinder group integral elevating, is also provided with gas cylinder valve, precision pressure meter and flow indicator on described tracheae.
Standard set-up of the present invention, adopt gases at high pressure as flow detection medium, fill gases at high pressure by one group of several high-pressured air cylinder group, lifting or lower general who has surrendered's high-pressured air cylinder group by jacking gear are seated on electronic balance, electronic balance weighs its gases at high pressure again and fills the of poor quality of front and back, measured value to institute's detected object (as the CNG filling machine in the present invention, high-pressure gas flow meter, CNG gas filler measurer) contrasts, and measures its error amount and whether meets standard; The method has overcome utilizes the uncertainty of original method of standard table filling machine device for on-site calibration to be difficult to the shortcoming improving, meet the demand for development of current high-pressure gas flow instrument, equipment calibrating business, its technical merit is compared with domestic similar standard set-up, flow range is wider, the accuracy of measuring is higher, measuring repeatability is better, and its expanded uncertainty reaches 0.05 %, and reliability is high.
Preferably, described jacking gear comprises the load wagon with wheel that can put described high-pressured air cylinder group, described load wagon bottom is provided with several hydraulic jacks, the flexible pipe of each described hydraulic jack is provided with the needle-valve of adjustable hydraulic oil mass, and the flexible pipe of all described hydraulic jacks connects a threeway directional control valve and oil pump.
Jacking gear includes load wagon, high-pressured air cylinder group is placed on load wagon to conveniently moving; The flexible pipe connecting tee directional control valve of all hydraulic jacks can be controlled the direction of hydraulic oil in single-acting system, adopts the jacking gear lifting of hydraulic jack stable, reliability is high.
Preferably, the high-pressured air cylinder group on described load wagon is six, be divided into two-layer, three every layer be fixed on described load wagon, the maximum working pressure (MOP) that each described high-pressured air cylinder is selected is 25MPa.
This high-pressured air cylinder group adopts 6 gas cylinders, be connected in parallel on a main line and be fixed on load wagon, on main line and each gas cylinder inflow point be all provided with and detect with tensimeter and switch gas cylinder valve.According to the flow range of detected object, can select one or more gas cylinders.
Preferably, the range of weighing that described electronic balance is selected is 0-600kg, and reading scale division value is 1g.
Preferably, the gases at high pressure that use in described high-pressured air cylinder group are pressurized air, and pressurized air cost is lower.
The present invention also provides a kind of detection method of the CNG of calibrating filling machine gas flow, wherein CNG filling machine comprises filling machine body, gas admittance valve, flowmeter, tensimeter, solenoid valve and air filling gun valve, and use the standard set-up that utilizes mass method detection gases at high pressure to fill flow as above, adopt following steps to detect:
Step 1, described standard set-up is connected to the air filling gun valve of tested CNG filling machine, described gas admittance valve connects high-pressure air source;
Step 2, by the electronic balance indicating value back to zero in described standard set-up, by the indicating value back to zero of described CNG filling machine;
Step 3, start described jacking gear, described high-pressured air cylinder group is placed on described electronic balance, the quality initial value before obtaining described high-pressured air cylinder group and filling;
Step 4, the gas admittance valve of opening CNG filling machine, air filling gun valve, open the gas cylinder valve of described high-pressured air cylinder group, and high-pressure air source fills high-pressured air cylinder group;
After step 5, described high-pressured air cylinder group fill, electronic balance weighs described high-pressured air cylinder group, obtain filling the quality value of filling after end, thereby obtain described high-pressured air cylinder group quality difference, obtain the flow indicating value of described CNG filling machine simultaneously, wherein fill and completely can judge by the maximum allowble pressure that whether reaches high-pressured air cylinder group;
Step 6, compare with the flow indicating value of described CNG filling machine by contrast electronic balance quality difference, whether meet actual metered standard by CNG filling machine described in the error judgment of the two value.
CNG filling machine of the present invention (compressed natural gas dispenser, be autoamtic compressed gas filling machine), refer to for fill (or drawing off) compressed natural gas to air container, and with the specialized equipment (being called for short CNG filling machine) of metering and the device such as valuation.Wherein maximum flow is not more than the filling machine of 30kg/min, is called low discharge filling machine; Maximum flow is greater than 30kg/min, and is not more than the filling machine of 70kg/min, is called middle flow filling machine; Maximum flow is greater than the filling machine of 70kg/min, is called large flow filling machine; Above-mentioned middle flow filling machine, large flow filling machine, also referred to as adding gas column or discharge column.
By the above-mentioned standard set-up that utilizes mass method detection gases at high pressure to fill flow, CNG filling machine is detected, high-pressure air source is to before and after the inflation of CNG filling machine, the front and back difference of the metering indicating value that CNG filling machine carries, and the difference of electronic balance front and back metering indicating value, contrast the error between the two difference, can measure detection to CNG filling machine flow, the error of this detection can obtain mean value through the gases at high pressure difference that fills repeatedly; Due to the metering method of electronic balance relatively tradition utilize water detection method, its precision is higher, accuracy error is less, can react more really the metering performance of CNG filling machine, the method is simple to operate, reliable and stable, cost is lower.
The present invention also provides a kind of detection method of the CNG of calibrating gas filler measurer flow, wherein CNG gas filler measurer comprises calibrating installation body, inlet valve, mass flowmeter, pressure gauge, display and outlet valve, use the as described above mass method detection gases at high pressure that utilize to fill the standard set-up of flow, adopt following steps to detect:
Step 1, described standard set-up is connected to the outlet valve of tested described CNG gas filler measurer, described inlet valve connects high-pressure air source;
Step 2, by the electronic balance indicating value back to zero in described standard set-up, by the indicating value back to zero of described display;
Step 3, start described jacking gear, described high-pressured air cylinder group is placed on described electronic balance, the quality initial value before obtaining described high-pressured air cylinder group and filling;
Step 4, the inlet valve of opening CNG gas filler measurer, outlet valve, open the gas cylinder valve of described high-pressured air cylinder group, and high-pressure air source fills high-pressured air cylinder group;
After step 5, described high-pressured air cylinder group fill, electronic balance weighs described high-pressured air cylinder group, obtain filling the quality value of filling after end, thereby obtain described high-pressured air cylinder group quality difference, obtain the flow indicating value of described CNG gas filler measurer simultaneously;
Step 6, compare with the flow indicating value of described CNG gas filler measurer by contrast electronic balance quality difference, whether meet actual metered standard by CNG gas filler measurer described in the error judgment of the two value.
CNG gas filler measurer (full name verification facility by master meter method of compressed natural gas dispenser), it adopts method of standard table principle, the metrological standard unit that autoamtic compressed gas filling machine is examined and determine or calibrated, this standard scale generally adopts coriolis mass flowmeters.The measurement standard of this CNG gas filler measurer is detected, be conducive to screen the higher CNG gas filler measurer of measuring accuracy CNG filling machine is measured.
The present invention also provides a kind of detection method of examining and determine high-pressure gas flow meter flow, wherein high-pressure gas flow meter comprises flowmeter bodies, inlet valve, mass flowmeter, pressure gauge, display and outlet valve, use the as described above mass method detection gases at high pressure that utilize to fill the standard set-up of flow, adopt following steps to detect:
Step 1, described standard set-up is connected to the outlet valve of tested described high-pressure gas flow meter, described inlet valve connects high-pressure air source;
Step 2, by the electronic balance indicating value back to zero in described standard set-up, by the indicating value back to zero of described display;
Step 3, start described jacking gear, described high-pressured air cylinder group is placed on described electronic balance, the quality initial value before obtaining described high-pressured air cylinder group and filling;
Step 4, the inlet valve of opening high-pressure gas flow meter, outlet valve, open the gas cylinder valve of described high-pressured air cylinder group, and high-pressure air source fills high-pressured air cylinder group;
After step 5, described high-pressured air cylinder group fill, electronic balance weighs described high-pressured air cylinder group, obtain filling the quality value of filling after end, thereby obtain described high-pressured air cylinder group quality difference, obtain the flow indicating value of described high-pressure gas flow meter simultaneously;
Step 6, compare with the flow indicating value of described high-pressure gas flow meter by contrast electronic balance quality difference, whether meet actual metered standard by high-pressure gas flow meter described in the error judgment of the two value.
High-pressure gas flow meter is the flow when measuring high-pressure gas flow in high-pressure air source and cross high-pressure gas flow meter, the accurate measurement of high-pressure gas flow meter whether direct relation the flow error of gases at high pressure reality, by the standard set-up that utilizes mass method detection gases at high pressure to fill flow, this high-pressure gas flow meter is examined and determine, can judge the accuracy of measuring of high-pressure gas flow meter, method is simple to operate, reliability is high.
compared with prior art, beneficial effect of the present invention:
1, the standard set-up that utilizes mass method detection gases at high pressure to fill flow of the present invention, adopt gases at high pressure as flow detection medium, fill gases at high pressure by one group of several high-pressured air cylinder group, lifting or lower general who has surrendered's high-pressured air cylinder group by jacking gear are seated on electronic balance, electronic balance weighs its gases at high pressure again and fills the of poor quality of front and back, measured value to institute's detected object (as the CNG filling machine in the present invention, high-pressure gas flow meter, CNG gas filler measurer) contrasts, and measures its error amount and whether meets standard; The method has overcome utilizes the uncertainty of original method of standard table filling machine device for on-site calibration to be difficult to the shortcoming improving, and has met the demand for development of current high-pressure gas flow instrument, equipment calibrating business, and reliability is high; Meet the demand for development current and business of quite a while inner high voltage gas flow instrument, equipment calibrating from now on, its technical merit is compared with domestic similar standard set-up, flow range is wider, the accuracy of measuring is higher, measuring repeatability is better, its expanded uncertainty reaches 0.05 %, and the key technical indexes is in current domestically leading level;
2, jacking gear of the present invention includes load wagon, high-pressured air cylinder group is placed on load wagon to conveniently moving; The flexible pipe connecting tee directional control valve of all hydraulic jacks can be controlled the direction of hydraulic oil in single-acting system, adopts the jacking gear lifting of hydraulic jack stable, reliability is high;
3, utilizing mass method to detect standard set-up that gases at high pressure fill flow can connect respectively CNG filling machine, CNG gas filler measurer, high-pressure gas flow meter CNG filling machine, CNG gas filler measurer, high-pressure gas flow meter are measured to detection, precision is higher, simple to operate, reliable and stable, synchronously detect but also can connect CNG filling machine, CNG gas filler measurer, high-pressure gas flow meter simultaneously, efficiency is higher.
Brief description of the drawings:
Fig. 1 is the work schematic diagram that utilizes mass method detection gases at high pressure to fill the standard set-up of flow of the present invention;
Fig. 2 is the syndeton schematic diagram of jacking gear of the present invention;
Fig. 3 is the structural front view of high-pressured air cylinder group of the present invention;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the pipeline system connection diagram while utilizing mass method to detect standard set-up that gases at high pressure fill flow CNG filling machine is detected;
Fig. 6 is the pipeline system connection diagram while utilizing mass method to detect standard set-up that gases at high pressure fill flow CNG gas filler measurer is detected;
Fig. 7 is the pipeline system connection diagram while utilizing mass method to detect standard set-up that gases at high pressure fill flow high-pressure gas flow meter is detected;
Fig. 8 is the pipeline system connection diagram while utilizing mass method to detect standard set-up that gases at high pressure fill flow simultaneously CNG filling machine, CNG gas filler measurer, high-pressure gas flow meter to be detected.
Mark in figure:
1, standard set-up, 11, high-pressured air cylinder group, 12, electronic balance, 13, gas cylinder valve, 14, precision pressure meter, 15, flow indicator, 16, jacking gear, 161, load wagon, 162, hydraulic jack, 163, safety locking valve, 164, flexible pipe, 165, needle-valve, 166, oil path block, 167, tensimeter, 168, threeway directional control valve, 169, oil pump, 2, CNG filling machine, 21, gas admittance valve, 22, flowmeter, 23, air filling gun valve, 24, tensimeter, 25, solenoid valve, 3, CNG gas filler measurer, 31, inlet valve, 32, mass flowmeter, 33, outlet valve, 34, pressure gauge, 35, display, 4, high-pressure gas flow meter, 41, inlet valve, 42, mass flowmeter, 43, outlet valve, 44, pressure gauge, 45, display, 5, high-pressure air source, 6, compressor train, 71, low pressure well, 72, strong well, 8, draft tube, 91, stop valve, 92, switch board, 93, computer data processing system.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
specific embodiment 1
As shown in Figure 1, a kind of standard set-up 1 that utilizes mass method detection gases at high pressure to fill flow, comprise several high-pressured air cylinder groups 11, electronic balance 12 and jacking gear 16, jacking gear 16 is as Fig. 2, be for by high-pressured air cylinder group 11 integral elevatings, on tracheae, be also provided with gas cylinder valve 13, precision pressure meter 14 and flow indicator 15.
The concrete structure of jacking gear 16 as shown in Figure 2, select hydraulic synchronization apparatus for automatically lifting 16, include the load wagon 161 of the provided with wheels of being convenient to fixing high-pressured air cylinder group 11, conveniently moving, load wagon 161 bottoms are provided with four hydraulic jacks 162, the flexible pipe 164 of each hydraulic jack 162 is provided with safety locking valve 163, all flexible pipes 164 connect an oil path block 166, on flexible pipe 164, be also provided with the needle-valve 165 of adjustable discrepancy oil cylinder hydraulic oil flow and can show the tensimeter 167 of hydraulic pressures, oil path block 166 connecting tee directional control valves 168, in single-acting system, can control the direction of hydraulic oil, threeway directional control valve 168 provides power source by oil pump 169.These hydraulic synchronization apparatus for automatically lifting 16 liftings are stable, reliability is high.
As shown in Figure 3,4, high-pressured air cylinder group 11 on load wagon 161 is that six high-pressured air cylinders are connected in parallel on flexible pipe, be divided into two-layer, three every layer be fixed on load wagon 161, the maximum working pressure (MOP) that each high-pressured air cylinder is selected is 25MPa, on main line and each gas cylinder inflow point be all provided with and detect with tensimeter and gas cylinder valve 13 for switch, according to the flow range of detected object, can select one or more gas cylinders.In addition, interior the used gases at high pressure of high-pressured air cylinder group 11 are pressurized air, and pressurized air cost is lower.
The range of weighing that above-mentioned electronic balance 12 is selected is 0-600kg, and reading scale division value is 1g.
Utilize hydraulic synchronization apparatus for automatically lifting 16 and wide range pin-point accuracy electronic balance 12 to realize the automatic weighing of high pressure high-pressured air cylinder gases at high pressure that group fills, its principle of work is summarized as follows: discharge high-pressured air cylinder inner high voltage gas to each flow interval in measuring method to the desired Preliminary pressure-filled of high-pressured air cylinder, remove frost and the water of gases at high pressure bottle surface, operation hydraulic synchronous lifting device 16 makes high pressure high-pressured air cylinder group load wagon 161 lift away from electronic balance 12 table tops, electronic balance 12 makes zero, again operating hydraulic synchronous lifting device 16 makes high pressure high-pressured air cylinder group load wagon 161 be down to electronic balance 12 table tops, record initial weighing value, open access point and fill gases at high pressure to rated pressure to high-pressured air cylinder group, disconnect access point, end of record weighing value, the difference of twice weighing is the value of filling of gases at high pressure.Repeat above-mentioned steps, the flow interval and the measurement number of times thereof that require according to measuring method complete whole measurements successively.
Standard set-up 1 of the present invention, adopt gases at high pressure as flow detection medium, fill gases at high pressure by one group of several high-pressured air cylinder group 11, lifting or lower general who has surrendered's high-pressured air cylinder group 11 by jacking gear 16 are seated on electronic balance 12, electronic balance 12 weighs its gases at high pressure again and fills the of poor quality of front and back, measured value to institute's detected object (as the CNG filling machine in the present invention, high-pressure gas flow meter, CNG gas filler measurer) contrasts, and measures its error amount and whether meets standard; The method has overcome utilizes the uncertainty of original method of standard table filling machine device for on-site calibration to be difficult to the shortcoming improving, meet the demand for development of current high-pressure gas flow instrument, equipment calibrating business, its technical merit is compared with domestic similar standard set-up, flow range is wider, precision is higher, detect repeatability higher, its expanded uncertainty reaches 0.05 %, and reliability is high.
specific embodiment 2
As shown in Figure 5, the present invention also provides a kind of detection of gas flow rate method that object is CNG filling machine 2 of examining and determine, wherein CNG filling machine 2 comprises filling machine body, gas admittance valve 21, flowmeter 22, tensimeter 24, solenoid valve 25 and air filling gun valve 23, and use the standard set-up 1 that utilizes mass method detection gases at high pressure to fill flow described above, adopt following steps to detect:
Step 1, standard set-up 1 is connected to the air filling gun valve 23 of tested CNG filling machine 2, gas admittance valve 21 connects high-pressure air source 5, selects pressurized air as high-pressure air source 5;
Step 2, by the 12 indicating value back to zeros of the electronic balance in standard set-up 1, by the indicating value back to zero of CNG filling machine 2;
Step 3, startup jacking gear 16, be placed in high-pressured air cylinder group 11 on electronic balance 12, obtains high-pressured air cylinder group 11 and fill front quality initial value;
Step 4, the gas admittance valve 21 of opening CNG filling machine, air filling gun valve 23, open the gas cylinder valve 13 of high-pressured air cylinder group 11, and high-pressure air source 5 fills high-pressured air cylinder group 11;
After step 5, high-pressured air cylinder group 11 fill, electronic balance 12 weighs high-pressured air cylinder group 11, obtain filling the quality value of filling after end, thereby obtain high-pressured air cylinder group 11 quality differences, obtain the flow indicating value of CNG filling machine 2 simultaneously, wherein fill and completely can judge by the maximum allowble pressure that whether reaches high-pressured air cylinder group 11;
Step 6, compare with the flow indicating value of CNG filling machine 2 by contrast electronic balance 12 quality differences, whether meet actual metered standard by the error judgment CNG filling machine of the two value.
The wherein control methods of above-mentioned steps six, as follows in the method for operating of actual mechanical process:
1) in the time of the maximum allowble pressure control model of charge pressure in high-pressured air cylinder group 11, stop filling, record detected object indicating value, record the filling weight indicating value of high-pressure gas flow standard set-up 1 simultaneously;
2) be calculated as follows the error of indication the j time measured of detected object in R (i) flow district
:
?
In formula:
---the error of indication that R (i) flow district is measured for the j time, unit is
;
---the filling weight indicating value of detected object is measured in R (i) flow district for the j time, and unit is kg;
---the filling weight indicating value of high-pressure gas flow standard set-up 1 is measured in R (i) flow district for the j time, and unit is kg;
i ?---flow district sequence number, i=1～3;
j ?---measure number of times sequence number, j=1～6;
3) be calculated as follows the error of indication of detected object in R (i) flow district
:
In formula:
---the error of indication in R (i) flow district, unit is
;
n ?---measure number of times; N=6;
4) be calculated as follows the error of indication of detected object
:
In formula:
?---the error of indication of detected object, unit is %.
5), according to the error of indication in each flow district, be calculated as follows the measuring repeatability of detected object in R (i) flow district
:
In formula:
---the measuring repeatability in R (i) flow district, unit is %;
6) be calculated as follows the measuring repeatability of detected object
:
In formula:
?---the measuring repeatability of detected object, unit is %.
The corresponding national standard of detected object or national metrological verification regulations or calibrating standard to the whether qualified judgment basis of testing result.By the above-mentioned standard set-up 1 that utilizes mass method detection gases at high pressure to fill flow, CNG filling machine 2 is detected, high-pressure air source 5 is to before and after 2 inflations of CNG filling machine, the front and back difference of the metering indicating value that CNG filling machine 2 carries, and the difference of electronic balance 12 front and back metering indicating values, contrast the error between the two difference, can measure detection to CNG filling machine 2 flows, the error of this detection can obtain mean value through the gases at high pressure difference that fills repeatedly; Due to the metering method of electronic balance 12 relatively tradition utilize water detection method, its precision is higher, accuracy error is less, can react more really the measuring accuracy of CNG filling machine 2, the method is simple to operate, reliable and stable, cost is lower.
specific embodiment 3
As shown in Figure 6, the present invention also provides a kind of detection method that object is CNG gas filler measurer 3 flows of examining and determine, wherein CNG gas filler measurer 3 comprises calibrating installation body, inlet valve 31, mass flowmeter 32, pressure gauge 34, display 35 and outlet valve 33, use the as described above mass method detection gases at high pressure that utilize to fill the standard set-up 1 of flow, adopt following steps to detect:
Step 1, standard set-up 1 is connected to the outlet valve 33 of tested described CNG gas filler measurer 3, described inlet valve 31 connects high-pressure air source 5;
Step 2, by the 12 indicating value back to zeros of the electronic balance in standard set-up 1, by the indicating value back to zero of display 35;
Step 3, startup jacking gear 16, be placed in high-pressured air cylinder group 11 on electronic balance 12, obtains high-pressured air cylinder group 11 and fill front quality initial value;
Step 4, the inlet valve 31 of opening CNG gas filler measurer 3, outlet valve 33, open the gas cylinder valve 13 of high-pressured air cylinder group 11, and high-pressure air source 5 fills high-pressured air cylinder group 11;
After step 5, high-pressured air cylinder group 11 fill, electronic balance 12 weighs high-pressured air cylinder group 11, obtain filling the quality value of filling after end, thereby obtain high-pressured air cylinder group 11 quality differences, obtain the flow indicating value of CNG gas filler measurer 3 simultaneously;
Step 6, compare with the flow indicating value of described CNG gas filler measurer 3 by contrast electronic balance 12 quality differences, whether meet actual metered standard by the error judgment CNG gas filler measurer 3 of the two value.
The wherein control methods of above-mentioned steps six, the method for operating of actual mechanical process as specific embodiment 2 in method.
CNG gas filler measurer 3(full name verification facility by master meter method of compressed natural gas dispenser), it adopts method of standard table principle, the metrological standard unit 1 that CNG filling machine 2 is examined and determine or calibrated, this standard scale generally adopts coriolis mass flowmeters.The measurement standard of this CNG gas filler measurer 3 is detected, be conducive to screen the higher CNG gas filler measurer 3 of measuring accuracy CNG filling machine 2 is measured.
specific embodiment 4
As shown in Figure 7, the present invention also provides a kind of detection method that object is high-pressure gas flow meter 4 flows of examining and determine, wherein high-pressure gas flow meter 4 comprises flowmeter bodies, inlet valve 41, mass flowmeter 42, pressure gauge 44, display 45 and outlet valve 43, use the standard set-up 1 that utilizes mass method detection gases at high pressure to fill flow described above, adopt following steps to detect:
Step 1, standard set-up 1 is connected to the outlet valve of tested high-pressure gas flow meter 4, inlet valve 41 connects high-pressure air source 5;
Step 2, by the 12 indicating value back to zeros of the electronic balance in standard set-up 1, by the indicating value back to zero of display 45;
Step 3, startup jacking gear 16, be placed in high-pressured air cylinder group 11 on described electronic balance 12, obtains high-pressured air cylinder group 11 and fill front quality initial value;
Step 4, the inlet valve 41 of opening high-pressure gas flow meter 4, outlet valve 43, open the gas cylinder valve 13 of high-pressured air cylinder group 11, and high-pressure air source 5 fills high-pressured air cylinder group 11;
After step 5, high-pressured air cylinder group 11 fill, electronic balance 12 weighs high-pressured air cylinder group 11, obtains filling the quality value of filling after end, thereby obtains high-pressured air cylinder group 11 quality differences, obtains the flow indicating value of high-pressure gas flow meter 4 simultaneously;
Step 6, compare with the flow indicating value of high-pressure gas flow meter 4 by contrast electronic balance 12 quality differences, whether meet actual metered standard by the error judgment high-pressure gas flow meter 4 of the two value.
The wherein control methods of above-mentioned steps six, in the method for operating of actual mechanical process as shown in specific embodiment 2.This high-pressure gas flow meter 4 is the flows when measuring high-pressure gas flow in high-pressure air source 5 and cross high-pressure gas flow meter 4, the accurate measurement of high-pressure gas flow meter 4 whether direct relation the flow error of gases at high pressure reality, by the standard set-up 1 that utilizes mass method detection gases at high pressure to fill flow, this high-pressure gas flow meter 4 is examined and determine, can judge the accuracy of measuring of high-pressure gas flow meter 4, method is simple to operate, reliability is high.
specific embodiment 5
In above-mentioned specific embodiment 2-4, the standard set-up 1 that utilizes mass method detection gases at high pressure to fill flow can connect respectively CNG filling machine 2, CNG gas filler measurer 3, high-pressure gas flow meter 4 comes respectively to CNG filling machine 2, CNG gas filler measurer 3, high-pressure gas flow meter 4 measures detection, precision is higher, simple to operate, reliable and stable, can also standard set-up 1 be connected to CNG filling machine 2 simultaneously, CNG gas filler measurer 3, high-pressure gas flow meter 4 synchronously detects, as shown in Figure 8, compressor train 6 connects respectively strong well 72 and low pressure well 71 by two draft tube 8, from low pressure well 71 draft tube 8 be out connected in parallel high-pressure gas flow meter 4 and CNG gas filler measurer 3, connect CNG filling machine 2 from strong well 72 draft tube 8 out, between two draft tube 8, connect by this stop valve 91, all high-pressure gas flow meters 4, CNG gas filler measurer 3, CNG filling machine 2 connects above-mentioned standard set-up 1 simultaneously, control by switch board 92 to stop valve 91, pressurized air can be opened separately or simultaneously and flow through high-pressure gas flow meter 4, CNG gas filler measurer 3, one or more in CNG filling machine 2, realize synchronous detection, the synchronous benefit detecting be can computer data handling system 93 to error amount mass simultaneous described above processing, efficiency is higher.
Claims (8)
1. a standard set-up (1) that utilizes mass method detection gases at high pressure to fill flow, it is characterized in that, comprise several high-pressured air cylinder groups (11), electronic balance (12) and jacking gear (16), all described high-pressured air cylinder groups (11) link together by tracheae, described jacking gear (16), for by described high-pressured air cylinder group (11) integral elevating, is also provided with gas cylinder valve (13), precision pressure meter (14) and flow indicator (15) on described tracheae.
2. the standard set-up (1) that utilizes mass method detection gases at high pressure to fill flow according to claim 1, it is characterized in that, described jacking gear (16) comprises the load wagon with wheel (161) that can put described high-pressured air cylinder group (11), described load wagon (161) bottom is provided with several hydraulic jacks (162), the flexible pipe (164) of each described hydraulic jack (162) is provided with the needle-valve (165) of adjustable hydraulic oil mass, the flexible pipe (164) of all described hydraulic jacks (162) connects a threeway directional control valve (168) and oil pump (169).
3. the standard set-up (1) that utilizes mass method detection gases at high pressure to fill flow according to claim 2, it is characterized in that, high-pressured air cylinder group (11) on described load wagon is six, be divided into two-layer, three every layer to be fixed on described load wagon (161) upper, the maximum working pressure (MOP) that each described high-pressured air cylinder is selected is 25MPa.
4. the standard set-up (1) that utilizes mass method detection gases at high pressure to fill flow according to claim 1, is characterized in that, the range of weighing that described electronic balance (12) is selected is 0～600kg, and reading scale division value is 1g.
5. the standard set-up (1) that utilizes mass method detection gases at high pressure to fill flow according to claim 1, is characterized in that, the gases at high pressure that use in described high-pressured air cylinder group (11) are pressurized air.
6. the detection method of calibrating CNG filling machine (2) gas flow, wherein CNG filling machine (2) comprises filling machine body, gas admittance valve (21), flowmeter (22), tensimeter (24), solenoid valve (25) and air filling gun valve (23), it is characterized in that, use the standard set-up (1) that utilizes mass method to detect gases at high pressure to fill flow as described in as arbitrary in right 1～4, adopt following steps to detect:
Step 1, described standard set-up (1) is connected to the air filling gun valve (23) of tested CNG filling machine (2), described gas admittance valve (23) connects high-pressure air source (5);
Step 2, by electronic balance (12) the indicating value back to zero in described standard set-up (1), by the indicating value back to zero of described CNG filling machine (2);
Step 3, start described jacking gear (16), described high-pressured air cylinder group (11) is placed in to described electronic balance (12) upper, the quality initial value before obtaining described high-pressured air cylinder group (11) and filling;
Step 4, the gas admittance valve (21) of opening CNG filling machine (2), air filling gun valve (23), the gas cylinder valve (13) of opening described high-pressured air cylinder group (11), high-pressure air source fills high-pressured air cylinder group (11);
After step 5, described high-pressured air cylinder group (11) fill, electronic balance (12) weighs described high-pressured air cylinder group (11), obtain filling the quality value of filling after end, thereby obtain described high-pressured air cylinder group (11) quality difference, obtain the flow indicating value of described CNG filling machine (2) simultaneously;
Step 6, compare with the flow indicating value of described CNG filling machine (2) by contrast electronic balance (12) quality difference, whether meet actual metered standard by CNG filling machine (2) described in the error judgment of the two value.
7. the detection method of calibrating CNG gas filler measurer (3) flow, wherein CNG gas filler measurer (3) comprises calibrating installation body, inlet valve (31), mass flowmeter (32), pressure gauge (34), display (35) and outlet valve (33), it is characterized in that, use the standard set-up (1) that utilizes mass method to detect gases at high pressure to fill flow as described in as arbitrary in right 1-4, adopt following steps to detect:
Step 1, described standard set-up (1) is connected to the outlet valve (33) of tested described CNG gas filler measurer (3), described inlet valve (31) connects high-pressure air source (5);
Step 2, by electronic balance (12) the indicating value back to zero in described standard set-up (1), by the indicating value back to zero of described display (35);
Step 3, start described jacking gear (16), described high-pressured air cylinder group (11) is placed in to described electronic balance (12) upper, the quality initial value before obtaining described high-pressured air cylinder group (11) and filling;
Step 4, the inlet valve (31) of opening CNG gas filler measurer, outlet valve (33), the gas cylinder valve (13) of opening described high-pressured air cylinder group (11), high-pressure air source (5) fills high-pressured air cylinder group (11);
After step 5, described high-pressured air cylinder group (11) fill, electronic balance (12) weighs described high-pressured air cylinder group (11), obtain filling the quality value of filling after end, thereby obtain described high-pressured air cylinder group (11) quality difference, obtain the flow indicating value of described CNG gas filler measurer (3) simultaneously;
Step 6, compare with the flow indicating value of described CNG gas filler measurer (3) by contrast electronic balance (12) quality difference, whether meet actual metered standard by CNG gas filler measurer (3) described in the error judgment of the two value.
8. the detection method of a calibrating high-pressure gas flow meter flow (4), wherein high-pressure gas flow meter (4) comprises flowmeter bodies, inlet valve (41), mass flowmeter (42), pressure gauge (44), display (45) and outlet valve (43), it is characterized in that, use the standard set-up (1) that utilizes mass method to detect gases at high pressure to fill flow (4) as described in as arbitrary in right 1-4, adopt following steps to detect:
Step 1, described standard set-up (1) is connected to the outlet valve (43) of tested described high-pressure gas flow meter (4), described inlet valve (41) connects high-pressure air source (5);
Step 2, by electronic balance (12) the indicating value back to zero in described standard set-up (1), by the indicating value back to zero of described display (45);
Step 3, start described jacking gear (16), described high-pressured air cylinder group (11) is placed in to described electronic balance (12) upper, the quality initial value before obtaining described high-pressured air cylinder group (11) and filling;
Step 4, the inlet valve (41) of opening high-pressure gas flow meter (4), outlet valve (43), the gas cylinder valve (13) of opening described high-pressured air cylinder group (11), high-pressure air source (5) fills high-pressured air cylinder group (11);
After step 5, described high-pressured air cylinder group (11) fill, electronic balance (12) weighs described high-pressured air cylinder group (11), obtain filling the quality value of filling after end, thereby obtain described high-pressured air cylinder group (11) quality difference, obtain the flow indicating value of described high-pressure gas flow meter (4) simultaneously;
Step 6, compare with the flow indicating value of described high-pressure gas flow meter (4) by contrast electronic balance (12) quality difference, whether meet actual metered standard by high-pressure gas flow meter (4) described in the error judgment of the two value.
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| CN107676626A (en) * | 2017-11-22 | 2018-02-09 | 内蒙古自治区计量测试研究院 | It is a kind of to provide the calibration system traced to the source for LNG gas filler measurers |
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| CN110455364A (en) * | 2019-04-04 | 2019-11-15 | 上海伍丰科学仪器有限公司 | A kind of micrometeor and ultra micro flow rate-measuring device and method |
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| CN110455364A (en) * | 2019-04-04 | 2019-11-15 | 上海伍丰科学仪器有限公司 | A kind of micrometeor and ultra micro flow rate-measuring device and method |
| CN112649560A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Gas emission simulation system |
| CN110906161A (en) * | 2019-12-27 | 2020-03-24 | 山东省计量科学研究院 | Automatic filling and weighing device for high-pressure gas |
| CN111289064A (en) * | 2020-04-02 | 2020-06-16 | 上海市计量测试技术研究院 | Online calibrating device and method for metering performance of hydrogenation machine |
| CN112664442A (en) * | 2020-12-24 | 2021-04-16 | 波露明（北京）科技有限公司 | Automatic calibration system and calibration method for metering pump |
| CN115077643A (en) * | 2022-07-26 | 2022-09-20 | 中国测试技术研究院流量研究所 | Flow detection device and detection method of micro-flow liquid |
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| CN114993398A (en) * | 2022-08-03 | 2022-09-02 | 四川中测流量科技有限公司 | Hydrogenation machine on-site calibrating device applying mass flow meter |
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| CN116757539A (en) * | 2023-06-20 | 2023-09-15 | 四川省产品质量监督检验检测院 | Big data-based quality inspection control system and method for natural gas filling station |
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