CN106556437A - The automatic compensation measurement method of natural gas flow measuring system - Google Patents
The automatic compensation measurement method of natural gas flow measuring system Download PDFInfo
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- CN106556437A CN106556437A CN201510625968.8A CN201510625968A CN106556437A CN 106556437 A CN106556437 A CN 106556437A CN 201510625968 A CN201510625968 A CN 201510625968A CN 106556437 A CN106556437 A CN 106556437A
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Abstract
The invention discloses a kind of automatic compensation measurement method of natural gas flow measuring system, the metering method includes the following steps that order is carried out：1）, by data actuation gather pipeline on fluid state parameter；2）, using above state parameter as the initial data of computing module, calculate flow parameter；Above step 1）In fluid state parameter be the corresponding instantaneous delivery value of each metering cycle, in step 2）In to calculate the method for flow parameter be that the instantaneous delivery value in meter period is integrated；When carrying out checking to senior orifice valve, changing orifice plate, maintenance, in step 2）In also include flow-compensated metering, the beginning of flow-compensated metering and stop pressurized force value control.The present invention can effectively exempt from or reduce because the maintenance of natural gas flowmeter, trimming process cause damage to supplying unit, while facilitating implementation automatic running or adjustment.
Description
Technical field
The present invention relates to natural gas transportation flow measurement field, the automatic compensation measurement method of more particularly to a kind of natural gas flow measuring system.
Background technology
Natural gas is a kind of clean energy resource of high-quality, and strategic position of developed country's natural gas in energy resource structure is established already.Which utilizes field extremely wide, chemical industry raw material, industrial fuel, business and domestic fuel, motor vehicle fuel, central heating with generate electricity etc., be one of main disposable consumption energy." enforcement of West-east Gas plan, reflects attention of the country to gas utilization, and although China start late, but growth momentum is powerful for China.Can see, the supply of China's natural gas source of the gas has welcome a piece of dawn, and the goose hangs high, various places gas utilization project are expected to extricate oneself from a plight rapidly, realize fast-developing.
With flourishing for China's natural gas long distance pipeline, especially after pipeline of transferring natural gas from the west to the east goes into operation operation, China's digitized NG Pipeline Construction enters the high-speed developing period.A kind of detection metering method with higher precision is provided, the paces of China's digitized NG Pipeline Construction undoubtedly can be further promoted.
The content of the invention
For flourishing with China's natural gas long distance pipeline in above-mentioned prior art, especially after pipeline of transferring natural gas from the west to the east goes into operation operation, China's digitized NG Pipeline Construction enters the high-speed developing period.A kind of detection metering method with higher precision is provided, the problem of the paces of China's digitized NG Pipeline Construction undoubtedly can be further promoted, the invention provides a kind of automatic compensation measurement method of natural gas flow measuring system.
The automatic compensation measurement method of the natural gas flow measuring system provided for the problems referred to above, the present invention is achieved the goal by following technical essential：The automatic compensation measurement method of natural gas flow measuring system, applies to the natural pressure differential effusion meter based on senior orifice valve, and the metering method includes the following steps that order is carried out：
1）, by data actuation gather pipeline on fluid state parameter；
2）, using above state parameter as the initial data of computing module, calculate flow parameter；
Above step 1）In fluid state parameter be the corresponding instantaneous delivery value of each metering cycle, in step 2）In to calculate the method for flow parameter be that the instantaneous delivery value in meter period is integrated；
When carrying out checking to senior orifice valve, changing orifice plate, maintenance, in step 2）In also include flow-compensated metering, the above it is flow-compensated metering be：Computing module gathers the internal clock signal of itself, obtains the total time T that natural gas flowmeter stops metering, with step 1）At least one of metering cycle instantaneous delivery value be initial data, product is made by total time T instantaneous delivery value corresponding with the single metering cycle, or the meansigma methodss by total time T with the instantaneous delivery value of multiple metering cycles makees product, obtain flow-compensated value；
Income value summation when the flow-compensated value and natural gas flowmeter are normally run, obtain the total flow value of natural gas line, the beginning of the flow-compensated metering and stop intrinsic pressure value size or two interior pressure reduction for adopting pressure pipe in pressure pipe being adopted as controlled quentity controlled variable with natural gas flowmeter.
Specifically, differential pressure flowmeter is adopted existing natural gas flowmeter more, and above differential pressure flowmeter adopts pressure point to obtain high pressure and low pressure more in the form of orifice plate, therefore existing natural gas line is when safeguarding, including checking in part, effusion meter correction and orifice plate cleaning process, it is required to stop measuring the natural gas of pipeline.The existing continuity to ensure pipeline supply, in the bypass in parallel of the both sides of natural gas flowmeter, is respectively provided with a block valve at the two ends of natural gas flowmeter, to ensure the connection of whole natural gas line when above-mentioned stopping is measured to pipeline.With the further development of differential pressure flowmeter, to avoid the above that media flow resistance of whole pipeline etc. is had influence in bypass line handoff procedure, to avoid occurring because the change of pipeline pipeline causes flowed fluctuation, high grade valve type orifice flow regulator has been used more than in prior art, i.e. senior orifice valve, the model code name of senior orifice valve is（K）GK connected modes-nominal pressure and valve body material, such as KGKF-25C, wherein, K represents sulfur resistive, and G is referred to as high type, and K is restricting element orifice plate code name, F is flange connection, involved standard mainly has GB/T2624.2-2006 and JB/T7252-94 etc., and the advantage of the senior orifice valve is without stopping medium conveying, while orifice plate inspection and replacing just can be completed online within a few minutes when checking, changing orifice plate, maintenance.
In order to not cause damage to supply unit, when more than carrying out checking to senior orifice valve, changing orifice plate, maintenance, by compensation measurement is arranged in metering method, the flow value obtained in flow-compensated metering process can be filled into after natural gas flowmeter system recovery from the total flow value of trend effusion meter.
The method route of the beginning of flow-compensated metering and the pressurized force value control of stopping, facilitating implementation the automatic running of this metering method above.The specific implementation of pressure above value control can pass through two intrinsic pressure values for adopting pressure pipe to be reduced to a certain extent, gauge pressure 0 is reduced to such as, or two interior pressure differences for adopting pressure pipe drop below certain numerical value, such as 0.02Mpa starts flow and supplements metering to substitute normal metering in the case of this；Conversely, when the intrinsic pressure rising in pressure pipe, or two interior pressure differences for adopting pressure pipe is adopted more than certain numerical value, effusion meter automatically switches to normal metering.
Further technical scheme is：
To cause the flow value obtained in flow-compensated metering process closer within this time by the flow value of senior orifice valve, when flow-compensated metering is carried out, make product by meansigma methodss of total time T with the instantaneous delivery value of multiple metering cycles, flow-compensated value is obtained, and multiple metering cycles of the above are distributed in the front-end and back-end that natural gas flowmeter stops meter period.And the flow-compensated metering of the above is with the metering cycle flow value of flow-compensated meter period front-end and back-end as reference quantity.
As a kind of to obtain the flow-compensated metering specific implementation closer to actual flow value, the metering cycle for being distributed in the front-end and back-end that natural gas flowmeter stops meter period is more than 20.
For ease of user, to more than, flow-compensated variable is adjusted, it is particularly well-suited to the few pipeline with time pipeline flow amplitude of variation when big of rear end gas equipment, also include adjusted coefficient K, flow-compensated value is K times of total time T and the product of the meansigma methodss of the instantaneous delivery value of the product or multiple metering cycles of single instantaneous delivery value above, and the K is positive number.Wherein, above K value can need adjustment according to user, and K is set to 1,0.9,1.1,1.2 etc. such as.
The invention has the advantages that：
1st, the present invention is needed for the actual motion of existing natural gas line, flow-compensated metering is added during flow measurement, when more than carrying out checking to senior orifice valve, changing orifice plate, maintenance, by compensation measurement is arranged in metering method, the flow value obtained in flow-compensated metering process can be filled into after natural gas flowmeter system recovery from the total flow value of trend effusion meter.The enforcement of above metering method, can effectively exempt from or reduce because the maintenance of natural gas flowmeter, trimming process cause damage to supplying unit.
2nd, the beginning of flow-compensated metering more than and the method route of the pressurized force value control of stopping, facilitating implementation the automatic running of this metering method.
Description of the drawings
Fig. 1 is the implementing procedure figure of automatic one specific embodiment of compensation measurement method of natural gas flow measuring system of the present invention.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but the structure of the present invention is not limited only to following examples.
Embodiment 1：
Such as Fig. 1, the automatic compensation measurement method of natural gas flow measuring system, apply to the natural pressure differential effusion meter based on senior orifice valve, the metering method includes the following steps that order is carried out：
1）, by data actuation gather pipeline on fluid state parameter；
2）, using above state parameter as the initial data of computing module, calculate flow parameter；
Above step 1）In fluid state parameter be the corresponding instantaneous delivery value of each metering cycle, in step 2）In to calculate the method for flow parameter be that the instantaneous delivery value in meter period is integrated；
When carrying out checking to senior orifice valve, changing orifice plate, maintenance, in step 2）In also include flow-compensated metering, the above it is flow-compensated metering be：Computing module gathers the internal clock signal of itself, obtains the total time T that natural gas flowmeter stops metering, with step 1）At least one of metering cycle instantaneous delivery value be initial data, product is made by total time T instantaneous delivery value corresponding with the single metering cycle, or the meansigma methodss by total time T with the instantaneous delivery value of multiple metering cycles makees product, obtain flow-compensated value；
Income value summation when the flow-compensated value and natural gas flowmeter are normally run, obtain the total flow value of natural gas line, the beginning of the flow-compensated metering and stop intrinsic pressure value size or two interior pressure reduction for adopting pressure pipe in pressure pipe being adopted as controlled quentity controlled variable with natural gas flowmeter.
Specifically, differential pressure flowmeter is adopted existing natural gas flowmeter more, and above differential pressure flowmeter adopts pressure point to obtain high pressure and low pressure more in the form of orifice plate, therefore existing natural gas line is when safeguarding, including checking in part, effusion meter correction and orifice plate cleaning process, it is required to stop measuring the natural gas of pipeline.The existing continuity to ensure pipeline supply, in the bypass in parallel of the both sides of natural gas flowmeter, is respectively provided with a block valve at the two ends of natural gas flowmeter, to ensure the connection of whole natural gas line when above-mentioned stopping is measured to pipeline.With the further development of differential pressure flowmeter, to avoid the above that media flow resistance of whole pipeline etc. is had influence in bypass line handoff procedure, to avoid occurring because the change of pipeline pipeline causes flowed fluctuation, high grade valve type orifice flow regulator has been used more than in prior art, i.e. senior orifice valve, the model code name of senior orifice valve is（K）GK connected modes-nominal pressure and valve body material, such as KGKF-25C, wherein, K represents sulfur resistive, and G is referred to as high type, and K is restricting element orifice plate code name, F is flange connection, involved standard mainly has GB/T2624.2-2006 and JB/T7252-94 etc., and the advantage of the senior orifice valve is without stopping medium conveying, while orifice plate inspection and replacing just can be completed online within a few minutes when checking, changing orifice plate, maintenance.
In the present embodiment, in order to not cause damage to supply unit, when more than carrying out checking to senior orifice valve, changing orifice plate, maintenance, by compensation measurement is arranged in metering method, the flow value obtained in flow-compensated metering process can be filled into after natural gas flowmeter system recovery from the total flow value of trend effusion meter.The method route of the beginning of flow-compensated metering and the pressurized force value control of stopping, facilitating implementation the automatic running of this metering method above.
Embodiment 2：
The present embodiment is further qualified on the basis of embodiment 1：Further technical scheme is：
To cause the flow value obtained in flow-compensated metering process closer within this time by the flow value of senior orifice valve, when flow-compensated metering is carried out, make product by meansigma methodss of total time T with the instantaneous delivery value of multiple metering cycles, flow-compensated value is obtained, and multiple metering cycles of the above are distributed in the front-end and back-end that natural gas flowmeter stops meter period.And the flow-compensated metering of the above is with the metering cycle flow value of flow-compensated meter period front-end and back-end as reference quantity.
As a kind of to obtain the flow-compensated metering specific implementation closer to actual flow value, the metering cycle for being distributed in the front-end and back-end that natural gas flowmeter stops meter period is more than 20.
For ease of user, to more than, flow-compensated variable is adjusted, it is particularly well-suited to the few pipeline with time pipeline flow amplitude of variation when big of rear end gas equipment, also include adjusted coefficient K, flow-compensated value is K times of total time T and the product of the meansigma methodss of the instantaneous delivery value of the product or multiple metering cycles of single instantaneous delivery value above, and the K is positive number.Wherein, above K value can need adjustment according to user, and K is set to 1,0.9,1.1,1.2 etc. such as.
Embodiment 3：
The present embodiment is further qualified on the basis of embodiment 2, used as a kind of specific implementation method for realizing that with this metering method gas discharge is uninterruptedly measured, the pipeline total flow=adjusted coefficient K * of natural gas【（20 metering cycle instantaneous deliveries after 20 metering cycle instantaneous delivery+flow-compensated meterings recover before flow-compensated metering）The flow-compensated Dose times T of/40*】Income value when+natural gas flowmeter normally runs.
Above content is the further description made to the present invention with reference to specific preferred implementation, it is impossible to assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, the other embodiment drawn under without departing from technical scheme is should be included in protection scope of the present invention.
Claims (4)
1. the automatic compensation measurement method of natural gas flow measuring system, applies to the natural pressure differential effusion meter based on senior orifice valve, and the metering method includes the following steps that order is carried out：
1）, by data actuation gather pipeline on fluid state parameter；
2）, using above state parameter as the initial data of computing module, calculate flow parameter；
Characterized in that, above step 1）In fluid state parameter be the corresponding instantaneous delivery value of each metering cycle, in step 2）In to calculate the method for flow parameter be that the instantaneous delivery value in meter period is integrated；
When carrying out checking to senior orifice valve, changing orifice plate, maintenance, in step 2）In also include flow-compensated metering, the above it is flow-compensated metering be：Computing module gathers the internal clock signal of itself, obtains the total time T that natural gas flowmeter stops metering, with step 1）At least one of metering cycle instantaneous delivery value be initial data, product is made by total time T instantaneous delivery value corresponding with the single metering cycle, or the meansigma methodss by total time T with the instantaneous delivery value of multiple metering cycles makees product, obtain flow-compensated value；
Income value summation when the flow-compensated value and natural gas flowmeter are normally run, obtain the total flow value of natural gas line, the beginning of the flow-compensated metering and stop intrinsic pressure value size or two interior pressure reduction for adopting pressure pipe in pressure pipe being adopted as controlled quentity controlled variable with natural gas flowmeter.
2. the automatic compensation measurement method of natural gas flow measuring system according to claim 1, it is characterized in that, when flow-compensated metering is carried out, make product by meansigma methodss of total time T with the instantaneous delivery value of multiple metering cycles, flow-compensated value is obtained, and multiple metering cycles of the above are distributed in the front-end and back-end that natural gas flowmeter stops meter period.
3. the automatic compensation measurement method of natural gas flow measuring system according to claim 2, it is characterised in that the metering cycle for being distributed in the front-end and back-end that natural gas flowmeter stops meter period is more than 20.
4. the automatic compensation measurement method of natural gas flow measuring system according to claim 1, it is characterized in that, also include adjusted coefficient K, flow-compensated value is K times of total time T and the product of the meansigma methodss of the instantaneous delivery value of the product or multiple metering cycles of single instantaneous delivery value above, and the K is positive number.
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| CN201510625968.8A CN106556437A (en) | 2015-09-28 | 2015-09-28 | The automatic compensation measurement method of natural gas flow measuring system |
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Application publication date: 20170405 |