CN208833303U - natural gas metering system - Google Patents
natural gas metering system Download PDFInfo
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- CN208833303U CN208833303U CN201821135535.XU CN201821135535U CN208833303U CN 208833303 U CN208833303 U CN 208833303U CN 201821135535 U CN201821135535 U CN 201821135535U CN 208833303 U CN208833303 U CN 208833303U
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- 238000005259 measurement Methods 0.000 claims abstract description 48
- 238000012552 review Methods 0.000 claims description 117
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Abstract
The utility model discloses a natural gas measurement system belongs to natural gas measurement technical field. This natural gas measurement system includes: the system comprises an incoming pipeline, at least two outgoing pipelines and at least two rechecking pipelines, wherein each outgoing pipeline in the at least two outgoing pipelines corresponds to one rechecking pipeline, a first gas flowmeter is connected in series with the incoming pipeline, a second gas flowmeter and a first control valve are connected in series with each outgoing pipeline in the at least two outgoing pipelines, and a second control valve is connected in series with each rechecking pipeline in the at least two rechecking pipelines. When the difference of the gas quantities of the natural gas in the natural gas metering system exceeds the error range, the natural gas distribution flow in the natural gas metering system is changed by opening or closing the first control valve and the second control valve, so that the first gas flowmeter is used as a rechecking gas flowmeter to recheck the metering result of the second gas flowmeter, and the second gas flowmeter with the metering error is quickly and accurately determined on the basis of reducing the installation quantity of the gas flowmeters.
Description
Technical field
The utility model relates to gas metering technical field, in particular to a kind of Measurement System of Natural Gas.
Background technique
Natural Gas Station is the place for distributing natural gas for multiple downstream users.In Natural Gas Station, one
As entered the station total air inflow of natural gas that pipeline inputs using Measurement System of Natural Gas to from natural gas, and from a plurality of natural gas
The natural gas of the outbound pipeline output of every natural gas in outbound pipeline divides displacement to be measured respectively.It is obtained according to metering
Total air inflow and the sum of multiple points of displacements, can determine the difference of the tolerance of natural gas in natural gas distribution work, Jin Ergen
It may determine that whether the metering system of Natural Gas Station needs assay calibration according to the difference of the tolerance of the natural gas.
Currently, most common Measurement System of Natural Gas is that natural gas compares metering system.Within the system, natural gas enters the station
One piece of common gas flowmeter and one piece of auxiliary gas flowmeter are installed on pipeline, meanwhile, in the outbound pipeline of every natural gas
On one piece of common gas flowmeter and one piece of auxiliary gas flowmeter are equally installed.When being measured, natural gas enters the station pipe
Common gas flowmeter on road measures the total air inflow for the natural gas for inputting the Natural Gas Station, meanwhile, every
Common gas flowmeter on the outbound pipeline of natural gas divides displacement to measure the natural gas in corresponding pipeline, works as basis
It, can when the difference of the tolerance for the natural gas that the sum of total air inflow and the tolerance of multiple points of displacements determine is more than acceptable error range
To open the auxiliary gas that natural gas enters the station on the auxiliary gas flowmeter and the outbound pipeline of every natural gas installed on pipeline
Flowmeter, by compare natural gas enter the station the two pieces of gas flowmeters installed on pipeline two metric results and every it is natural
The metric results for the two pieces of gas flowmeters installed on the outbound pipeline of gas, from multiple common gas flows of a plurality of Pipe installing
Determine that there are the gas flowmeters of failure in meter, so as to there are the gas flowmeters of failure again assay calibration.
It is both needed to installation at least two pieces of gas flowmeters on above-mentioned metering system, every pipeline, increases cost of investment, and
And when the difference of the tolerance of natural gas be more than error range when, technical staff need to enter the station to natural gas pipeline and every natural gas it is defeated
The metric results of the two pieces of gas flowmeters worked at the same time in feed channel are compared, and increase gage work amount.
Utility model content
The utility model provides a kind of Measurement System of Natural Gas, can solve Measurement System of Natural Gas throwing in the related technology
The problem of providing at high cost, review metric results heavy workloads.The technical solution is as follows:
A kind of Measurement System of Natural Gas, the Measurement System of Natural Gas include enter the station pipeline, at least two outbound pipelines and
At least two review pipelines, every outbound pipeline at least two outbound pipelines are corresponding with a review pipeline；
First gas flowmeter, every outbound pipe at least two outbound pipelines are in series on the pipeline that enters the station
Second gas flowmeter and the first control valve are in series on road, first control valve is located at the second gas flowmeter
Upstream end；
It is in series with the second control valve on every review pipeline at least two review pipelines, described at least two
The first end of every review pipeline in review pipeline is connect with the pipeline that enters the station, and the first end of every review pipeline
It is located at the upstream end of the first gas flowmeter, a plurality of every checked in pipeline with the tie point of the pipeline that enters the station
Check the second end outbound pipeline connection corresponding with corresponding review pipeline of pipeline, and the second end of every review pipeline with it is corresponding
The tie point of outbound pipeline be located at first control valve and the second gas flowmeter on corresponding outbound pipeline
Between.
Optionally, the precision of the first gas flowmeter is higher than the precision of the second gas flowmeter.
Optionally, the pipeline that enters the station also is connected, and there are two third control valve door, described two third control valve door difference
Positioned at the two sides of the first gas flowmeter, described two third control valve doors be used to control the pipeline that enters the station unlatching and
It closes.
Optionally, every outbound pipeline at least two outbound pipelines is also in series at least one first control valve
Door, at least one described first control valve are located at the downstream of the second gas flowmeter, at least one described first control
Valve processed is used to control the opening and closing of corresponding outbound pipeline.
Optionally, the Measurement System of Natural Gas further includes review total pipeline, the first end of the review total pipeline and institute
Pipeline connection of entering the station is stated, the first end of every review pipeline at least two review pipelines is total by connecting the review
The second end of pipeline is connect with the pipeline that enters the station.
Optionally, the review total pipeline is in series with the 4th control valve, and the review total pipeline concatenated
Four control valves are used to control the opening and closing of the review total pipeline.
Optionally, the first gas flowmeter and the second gas flow are calculated as gas ultrasonic flowmeter.
Optionally, first control valve and second control valve are ball valve.
The beneficial effect of technical solution provided by the embodiment of the utility model includes at least:
Measurement System of Natural Gas provided by the embodiment of the utility model includes enter the station pipeline, at least two outbound pipelines and extremely
Lack two review pipelines, every outbound pipeline at least two outbound pipelines is corresponding with a review pipeline.Using this day
It, can be by being mounted on the first gas flowmeter to enter the station on pipeline when right gas metering system measures the tolerance of natural gas
The total air inflow for the pipeline that enters the station is measured, and the second gas stream by being separately mounted at least two outbound pipelines
Meter divides displacement to measure natural gas in every outbound pipeline at least two outbound pipelines.When according to total air inlet
When the difference of the tolerance for the natural gas that the sum of amount and the tolerance of multiple points of displacements determine is more than acceptable error range, then close to
The first control valve on remaining outbound pipeline in addition to outbound pipeline to be detected in few two outbound pipelines, and open
Second checked on pipeline corresponding with remaining outbound pipeline at least two outbound pipelines in addition to outbound pipeline to be detected
Control valve carries out natural gas to remaining outbound pipeline in addition to outbound pipeline to be detected by review pipeline defeated
Gas.At this point, the second gas flowmeter on the metric results and outbound pipeline to be detected that pass through comparison first gas flowmeter
Metric results, then can determine whether the metric results of the second gas flowmeter on outbound pipeline to be detected accurate.Such as
The metric results of second gas flowmeter on the fruit outbound pipeline to be detected are accurate, then are continued by aforesaid operations to other
Outbound pipeline is detected, until finding out the second gas flowmeter on the outbound pipeline there are error.It can be seen that being at this
It, can be by first gas flowmeter gas flowmeter and second gas as a comparison when detecting the outbound pipeline of a certain item in system
The metric results of flowmeter compare, therefore reduce natural gas and enter the station gas flowmeter on pipeline and the outbound pipeline of natural gas
Installation number, saved cost of investment.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of Measurement System of Natural Gas provided by the embodiment of the utility model；
Fig. 2 is the schematic diagram of another Measurement System of Natural Gas provided by the embodiment of the utility model.
Appended drawing reference:
1: enter the station pipeline；2: outbound pipeline；3: review pipeline；4: first gas flowmeter；5: second gas flowmeter；6:
First control valve；7: the second control valves；8: third control valve door；9: review total pipeline；10 the 4th control valves.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Fig. 1 is a kind of schematic diagram of Measurement System of Natural Gas provided by the embodiment of the utility model.Referring to Fig. 1, this is natural
Gas metering system includes enter the station pipeline 1, at least two outbound pipelines 2 and at least two review pipelines 3, at least two outbound pipelines
Every outbound pipeline 2 in 2 is corresponding with a review pipeline 3；It enters the station and is in series with first gas flowmeter 4, at least two on pipeline 1
Second gas flowmeter 5 and the first control valve 6, the first control valve are in series on every outbound pipeline 2 in the outbound pipeline 2 of item
Door 6 is located at the upstream end of second gas flowmeter 5；Second is in series on every review pipeline 3 at least two review pipelines 3
The first end of control valve 7, every review pipeline 3 at least two review pipelines 3 is connect with the pipeline 1 that enters the station, and every multiple
The tie point of the first end of core pipeline 3 and the pipeline 1 that enters the station is located at the upstream end of first gas flowmeter 4, in a plurality of review pipeline 3
The second end outbound pipeline 2 corresponding with corresponding review pipeline 3 of every review pipeline 3 connect, and the of every review pipeline 3
Two ends are located at the first control valve 6 and second gas stream on corresponding outbound pipeline 2 with the tie point of corresponding outbound pipeline 2
Between meter 5.
It is led in Natural Gas Station from natural gas transmission main pipeline it should be noted that the pipeline 1 that enters the station refers to, it is right
Flow through the pipeline that the natural gas tolerance in the pipeline is measured.Wherein, the pipeline 1 that enters the station can pass through Natural Gas Station
Interior filtration system or/and pressure regulating system.The pipeline 1 that enters the station can be made of more cast irons or steel natural gas transmission pipe,
As long as can guarantee the compression strength and corrosion resistance for the pipeline 1 that enters the station, the utility model embodiment does not do specific limit to this
It is fixed.The internal diameter of the pipeline of pipeline 1 of entering the station determines by the plan displacement of Natural Gas Station, the plan displacement of Natural Gas Station
Bigger, the internal diameter of the pipeline for the pipeline 1 that enters the station is also bigger, and the utility model embodiment is not specifically limited in this embodiment.
In addition, being in series with first gas flowmeter 4 on the pipeline 1 that enters the station, wherein first gas flowmeter 4 is for measuring
The instrument for the natural gas tolerance flowed through in pipeline 1 that enters the station, the detection part of first gas flowmeter 4 are mounted on the interior of bipass
Portion, the reading of first gas flowmeter 4 are partially installed on the outer wall of bipass, by the way that one end of the bipass is entered the station with composition
One end of a natural gas transmission pipe in more natural gas transmission pipes of pipeline 1 connects, by the other end of the bipass and separately
One end connection of a piece natural gas transmission pipe, enters the station on pipeline 1 so that first gas flowmeter 4 is serially connected in.First gas stream
The precision of meter 4 can be characterized with the measurement error of first gas flowmeter 4, and the measurement error of first gas flowmeter 4 is got over
Small, then the precision of first gas flowmeter 4 is higher, for example, the measurement error of first gas flowmeter 4 can for 1.5%,
1.0%, 0.5%, 0.2% or other numerical value, as long as guaranteeing first gas flowmeter 4 to the natural gas tolerance to enter the station in pipeline 1
Accurate measurement, the utility model embodiment is not specifically limited in this embodiment.
Optionally, first gas flowmeter 4 can be gas ultrasonic flowmeter.Wherein, gas ultrasonic flowmeter is to pass through
Fluid flowing is detected to the effect of supersonic beam or ultrasonic pulse with the instrument of measuring flow.Because ultrasonic flowmeter is a kind of non-
Contact instrument, its accuracy of measurement is very high, hardly by the interference of the various parameters of measured medium, therefore can choose gas
Body ultrasonic flowmeter measures the natural gas tolerance to enter the station in pipeline 1, to improve to the natural gas tolerance to enter the station in pipeline 1
Metering accuracy.
Optionally, first gas flowmeter 4 can also be gas turbine meter or gas precession turbine flowmeter, this reality
The type of first gas flowmeter is not limited specifically with new embodiment.
Optionally, in one possible implementation, referring to fig. 2, entering the station can also connect that there are two thirds on pipeline 1
Control valve 8, two third control valve doors 8 are located at the two sides of first gas flowmeter 4, and two third control valve doors 8 are used
In the opening and closing for controlling the pipeline 1 that enters the station.
Since the pipeline 1 that enters the station is by more natural gas transmission pipes and to be provided with a two-way of first gas flowmeter 4
Pipe composition, connects two third control valve doors 8 respectively in the two sides for the first gas flowmeter 4 on pipeline 1 that enters the station, can be two
More natural gas transmission pipes or first gas flowmeter 4 between a third control valve door 8 pass through closing there are when security risk
Two third control valve doors 8 block the more natural gas transmission pipes and on the pipeline 1 that enters the station between two third control valve doors 8
The connection of one gas flowmeter 4, it is safe to protect the instrument of enter the station pipeline 1 and first gas flowmeter 4 to use.In confirmation two the
After the security risk of more natural gas transmission pipes and first gas flowmeter 4 between three control valves 8 excludes, by opening two
A third control valve door 8 is come the more natural gas transmission pipes and the first gas between two third control valve doors 8 on the pipeline 1 that makes to enter the station
Flowmeter body 4 is connected to.
It should be noted that third control valve door 8 includes a bipass and valve positioner, valve positioner setting exists
The upside of the bipass, third control valve door 8, which is connected on, to enter the station on pipeline 1.Third control valve door 8 can be steel material,
It can be other materials, as long as the intensity of the material of third control valve door 8 can guarantee that third control valve door 8 exists in use process
Structure does not occur to damage and deform after bearing the pressure of the natural gas to enter the station in pipeline 1, and the utility model embodiment is to this
It is not specifically limited.In addition, can choose to realize the quick opening and closing to the pipeline 1 that enters the station and only need to rotate 90 ° just
The ball valve of pipeline can be opened or closed as third control valve door 8, to realize the behaviour for quickly opening and closing the pipeline 1 that enters the station
Make.
Optionally, third control valve door 8 can be gate valve, plug valve etc., as long as can guarantee that the pipeline 1 that can make to enter the station is fast
Speed, easy execution open and close operation, and the utility model embodiment is not specifically limited in this embodiment.
Outbound pipeline 2 refers to the pipeline being attached in Measurement System of Natural Gas with the gas pipeline of downstream user, and extremely
The connection type of few two outbound pipelines 2 and the pipeline 1 that enters the station is to be connected in parallel.Natural gas enters natural gas meter from the pipeline 1 that enters the station
It, can be by the downstream user's progress gas transmission of outbound pipeline 2 after amount system.The number of outbound pipeline 2 can be by dividing with natural gas
The number for the downstream user that defeated station is signed an agreement is determined, wherein and each downstream user is corresponding with an outbound pipeline 2, this
Utility model embodiment is not specifically limited the quantity of outbound pipeline.
In addition, every outbound pipeline 2 of at least two outbound pipelines 2 is by more cast irons or steel natural gas transmission pipe group
At, and the making material of every outbound pipeline 2 and internal diameter of the pipeline may be the same or different.Wherein, since at least two go out
The natural gas tolerance of every outbound pipeline 2 in pipeline 2 of standing is respectively less than the natural gas tolerance for the pipeline 1 that enters the station, therefore, every outbound pipe
The compression strength and corrosion resistance in road 2 can be lower than the compression strength and corrosion resistance of the pipeline 1 that enters the station, and every outbound pipeline 2
Internal diameter of the pipeline can be less than the internal diameter of the pipeline of pipeline 1 of entering the station, the cost of investment of Measurement System of Natural Gas is reduced with this.
It should be noted that being in series with second gas flowmeter on every outbound pipeline 2 at least two outbound pipelines 2
5.Wherein, on every outbound pipeline 2 concatenated second gas flowmeter 5 for measure flowed through in corresponding outbound pipeline 2 it is natural
Gas tolerance.
It should be noted that the detection part of second gas flowmeter 5 is mounted on the inside of bipass, second gas flow
The reading of meter 5 is partially installed on the outer wall of bipass, by by one end of the bipass and correspondingly more days of outbound pipeline 2
One end connection of a natural gas transmission pipe in right gas appendix, will be in the other end of the bipass and the outbound pipeline 2
One end connection of another natural gas transmission pipe, so that second gas flowmeter 5 is serially connected on correspondingly outbound pipeline 2.The
Two gas flowmeters 5 or gas ultrasonic flowmeter.Optionally, second gas flowmeter 5 can also be gas-turbine stream
Meter or gas precession turbine flowmeter.
In addition, the precision of second gas flowmeter 5 can be consistent with the precision of first gas flowmeter 4, it can also be different
It causes, as long as guaranteeing second gas flowmeter 5 to the natural gas tolerance in every outbound pipeline 2 at least two outbound pipelines 2
Accurate measurement, the utility model embodiment is not specifically limited in this embodiment.
Optionally, the precision of first gas flowmeter 4 is higher than the precision of second gas flowmeter 5.
It should be noted that since first gas flowmeter 4 is in gas metering system provided by the embodiment of the utility model
The review gas flowmeter that can be used as second gas flowmeter 5 in system carries out the metering accuracy of second gas flowmeter 5
Review, therefore, the precision of first gas flowmeter 4 can be higher than the precision of second gas flowmeter 5.Due to gas flowmeter
Precision can be measured by measurement error, and measurement error is smaller, and precision is higher, therefore, the metering of first gas flowmeter 4
Error can be less than second gas flowmeter.For example, when the measurement error of second gas flowmeter 5 is 1.5%, first gas
The measurement error of flowmeter 4 can choose 1.0%, 0.5%, 0.2% or other numerical value.
In addition, the second gas flowmeter 5 on every outbound pipeline 2 referring to Fig. 1, at least two outbound pipelines 2
Upstream end can also be in series with the first control valve 6.When appointing at least two outbound pipelines 2 in Measurement System of Natural Gas
When there is measurement error in one piece of second gas flowmeter 5, the first control valve of the upstream end by being located at second gas flowmeter 5
Door 6 controls the opening and closing of the outbound pipeline 2 of any bar at least two outbound pipelines 2, makes first gas flowmeter 4 can be with
The second gas flowmeter 5 on correspondingly outbound pipeline 2 is checked as review gas flowmeter.
It should be noted that the first control valve 6 can be valve identical with third control valve door 8, and first controls
The dependency structure of valve 6 can refer to the aforementioned introduction to third control valve door 8, and the utility model embodiment is no longer superfluous herein
It states.
Optionally, referring to fig. 2, the second gas flowmeter on every outbound pipeline 2 at least two outbound pipelines 2
5 downstream can also be in series at least one first control valve 6, and be located at the downstream of second gas flowmeter 5 extremely
Few first control valve 6 is used to control the opening and closing of corresponding outbound pipeline 2.
It should be noted that the second gas flowmeter 5 on every outbound pipeline 2 at least two outbound pipelines 2
Downstream connect at least one first control valve 6, when 6 He of the first control valve of the upstream end of second gas flowmeter 5
More natural gas transmission pipes and second gas flowmeter 5 between first control valve 6 of the downstream of second gas flowmeter 5
There are when security risk, the first control valve 6 and second gas stream of the upstream end of closing second gas flowmeter 5 can be passed through
First control valve 6 of the downstream of meter 5, come block second gas flowmeter 5 upstream end the first control valve 6 and
The connection of more natural gas transmission pipes between first control valve 6 of the downstream of two gas flowmeters 5, to ensure outbound pipe
Road 2 and second gas flowmeter 5 using safe.6 He of the first control valve in the upstream end of confirmation second gas flowmeter 5
More natural gas transmission pipes and second gas flowmeter 5 between first control valve 6 of the downstream of second gas flowmeter 5
After excluding security risk, the first control valve 6 and second gas flowmeter of the upstream end of second gas flowmeter 5 are opened simultaneously
First control valve 6 of 5 downstream is connected to the first control valve 6 and second gas of the upstream end of second gas flowmeter 5
More natural gas transmission pipes between first control valve 6 of the downstream of flowmeter 5.
Review pipeline 3 refers to the pipeline that metering review is carried out for the natural gas tolerance at least two outbound pipelines 2.It is multiple
Core pipeline 3 is identical as the quantity of outbound pipeline 2, and checks pipeline 3 and outbound pipeline 2 one-to-one correspondence.Checking pipeline 3 can be by more
Root cast iron or steel natural gas transmission pipe composition.And check compression strength, the anti-corruption of pipeline 3 and corresponding outbound pipeline 2
Erosion ability is identical with internal diameter of the pipeline.
Wherein, the second control valve 7, the second control are in series on every review pipeline 3 at least in two review pipelines 3
Valve 7 is used to control the opening and closing of every review pipeline 3 at least two review pipelines 3.Wherein, the second control valve
7 structure can refer to the structure of aforementioned third control valve door 8, and details are not described herein for the utility model embodiment.
It should also be noted that, at least two review pipelines 3 in every review pipeline 3 first end can respectively with into
Pipeline 1 of standing independent connection.Wherein, when the first end of every review pipeline 3 at least two review pipelines 3 and the pipeline 1 that enters the station
When connection, tee tube identical at least two 3 quantity of review pipeline can be set entering the station on pipeline 1, at least two reviews
The corresponding tee tube of every review pipeline 3 in pipeline 3, the first end and second end of multiple tee tubes enter the station with composition respectively
Two natural gas transmission pipes connection in more natural gas transmission pipes of pipeline 1, every at least two review pipelines 3 is multiple
The first end of core pipeline 3 and the third end of tee tube connect, and realize every review pipeline 3 at least two review pipelines 3
First end is connect with the pipeline 1 that enters the station.At this point, the tie point of the first end of every review pipeline 3 and the pipeline 1 that enters the station is located at the first gas
The upstream end of flowmeter body 4.The second end of every review pipeline 3 in a plurality of review pipeline 3 is corresponding with corresponding review pipeline 3
Outbound pipeline 2 connects, and the second end of every review pipeline 3 with the tie point of corresponding outbound pipeline 2 positioned at corresponding outbound
On pipeline 2 between the first control valve 6 and second gas flowmeter 5 of the upstream end of second gas flowmeter 5, pass through
It opens or closes the first control valve 6 for being located at the upstream end of second gas flowmeter 5 on the outbound pipeline 2 of any bar and corresponds to
The second control valve 7 on pipeline 3 is checked, first gas flowmeter 4 can be made as the review gas on corresponding outbound pipeline
Flowmeter checks the second gas flowmeter 5 on corresponding outbound pipeline 2.
In another implementation, referring to fig. 2, Measurement System of Natural Gas can also include review total pipeline 9, that is,
Every review pipeline 3 at least two review pipelines 3 can be first connected in parallel with review total pipeline 9 respectively, then multiple by this
Core total pipeline 9 is connect with the pipeline 1 that enters the station.
Specifically, the first end of every review pipeline 3 at least two review pipelines 3 can be made by checking with corresponding
The corresponding tee tube of pipeline 3 is connected in parallel on review total pipeline 9, then the first end for checking total pipeline 9 is passed through a threeway
Pipe, which is connected in parallel, to enter the station on pipeline 1, and closes the second end port of review total pipeline 9, makes the natural gas to enter the station in pipeline 1
It can be divided to by review total pipeline 9 and be transported in every review pipeline 3 at least two review pipelines 3.Due to entering the station when closing
When pipeline 1, the natural gas tolerance for flowing through review total pipeline 9 is equal with by the natural gas tolerance of pipeline 1 that enters the station, therefore checks total
Compression strength, corrosion resistance and the internal diameter of the pipeline of pipeline 9 can be with compression strength, corrosion resistance and the pipes for the pipeline 1 that enters the station
Road internal diameter is identical.Total pipeline 9 is checked by setting, may be implemented to every review pipeline 3 at least two review pipelines 3
Centralized management.At this point, the first end of review total pipeline 9 and the tie point for the pipeline 1 that enters the station are located at the upstream of first gas flowmeter 4
End, a plurality of second end for checking every review pipeline 3 in pipeline 3 outbound pipeline 2 corresponding with corresponding review pipeline 3 connect,
And the second end of every review pipeline 3 is located at the second gas on corresponding outbound pipeline 2 with the tie point of corresponding outbound pipeline 2
Between the first control valve 6 and second gas flowmeter 5 of 5 upstream end of flowmeter body, by opening the outbound pipeline 2 of any bar
On 5 upstream end of second gas flowmeter the first control valve 6 and the second control valve 7 on corresponding review pipeline 3, can
So that first gas flowmeter 4 is as the review gas flowmeter on corresponding outbound pipeline 2 to second on corresponding outbound pipeline 2
Gas flowmeter 5 is checked.
Optionally, referring to fig. 2, review total pipeline 9 can also be in series with the 4th control valve 10, and check total pipeline
9 concatenated 4th control valves 10 are used to control the opening and closing of review total pipeline 9.
When the first end of every review pipeline 3 at least two review pipelines 3 and the pipeline 1 that enters the station pass through review total pipeline
9 when being attached, and the 4th control valve 10 can also be arranged on review total pipeline 9, when every at least two review pipelines 3
When pipe leakage or piping failure occurs in pipeline between the first end and the pipeline 1 that enters the station of item review pipeline 3, by setting multiple
10 pairs of review total pipelines 9 of the 4th control valve on core total pipeline 9 are closed, to block at least two review pipelines 3
Pipeline connection between the first end and the pipeline 1 that enters the station of every review pipeline 3.When every in confirmation at least two review pipelines 3
When item checks the pipeline between the first end and the pipeline 1 that enters the station of pipeline 3 without safety problem, setting is opened on review total pipeline 9
The 4th control valve 10 so that the first end of every review pipeline 3 at least two review pipelines 3 and enter the station pipeline 1 it
Between pipeline connection.
It should be noted that the structure of the 4th control valve 10 can refer to the structure of aforementioned third control valve door 8, this reality
With new embodiment, details are not described herein.
After Measurement System of Natural Gas provided by the embodiment of the utility model is introduced, next to the utilization day
Right gas metering system carry out gas metering and implementation that the natural gas tolerance for flowing through outbound pipeline is checked into
Row is introduced.
When being measured using the Measurement System of Natural Gas to the natural gas tolerance for distributing to multiple downstream users, first beat
The first control valve 6 for being located at 5 upstream end of second gas flowmeter on every outbound pipeline 2 of at least two outbound pipelines 2 is opened,
And close with the second control valve 7 at least two review pipelines 3 on every review pipeline 3, allow natural gas through into
Pipeline 1 of standing flows into every outbound pipeline 2 of at least two outbound pipelines 2, the first gas flowmeter 4 to enter the station on pipeline 1
It can be measured to the natural gas tolerance to enter the station in pipeline 1 is flowed through, on the outbound pipeline 2 of every of at least two outbound pipelines 2
Second gas flowmeter 5 the natural gas tolerance flowed through in corresponding outbound pipeline 2 can be measured, will at least two it is outbound
The metric results of second gas flowmeter 5 on the outbound pipeline 2 of every of pipeline 2 are added, obtain in Measurement System of Natural Gas to
Total tolerance of the natural gas of multiple downstream user conveyings, calculates total tolerance and first of the natural gas conveyed to multiple downstream users
Tolerance difference between the metric results of gas flowmeter 4 illustrates that tolerance is poor if the tolerance difference, which is greater than first, allows difference
Value has been over the error amount of permission, at this point it is possible to determine at least two second gas streams in the Measurement System of Natural Gas
Meter 5 needs to detect.If the tolerance difference allows difference no more than first, illustrate the tolerance difference in the error range of permission
It is interior, at this point, can then determine that at least two second gas flowmeters in the Measurement System of Natural Gas are not necessarily to detection.
When determining that at least two second gas flowmeters 5 in Measurement System of Natural Gas need to detect by the above method
When, it can first open the upstream for being located at second gas flowmeter 5 on first outbound pipeline 2 at least two outbound pipelines 2
The first control valve 6 held and the first control valve 6 positioned at the downstream of second gas flowmeter 5 are closed at least two and are gone out
It is located at the of the upstream end of second gas flowmeter 5 on other the outbound pipelines 2 except first article of outbound pipeline 2 stood in pipeline 2
One control valve 6, and close on review pipeline 3 corresponding with the outbound pipeline 2 of first at least two outbound pipelines 2
Second control valve 7, open at least two outbound pipelines 2 except other outbound pipelines 2 of first outbound pipeline 2 are corresponding
Review pipeline 3 on the second control valve 7, in this way, the natural gas for distributing to the first user in multiple downstream users can be with
First outbound pipeline 2 is flowed directly into out of enter the station pipeline 1, distribute in multiple downstream users except the first user other use
The natural gas at family can flow into other outbound pipelines 2 through review pipeline 3 corresponding with other outbound pipelines 2.At this point, the first gas
Flowmeter body 4 can be used as the review gas flowmeter of the second gas flowmeter 5 on first outbound pipeline 2, read first
The metric results of the natural gas tolerance of the metric results and second gas flowmeter 5 of the natural gas tolerance of gas flowmeter 4, compare
Two metric results read, if difference between two metric results, which is greater than second, allows difference, illustrate first it is outbound
The metric results of second gas flowmeter 5 on pipeline 2 have exceeded the error range of permission, at this time, it may be necessary to outbound to first
Second gas flowmeter 5 on pipeline 2 is replaced or is repaired.
If the metric results of the natural gas tolerance of first gas flowmeter 4 and the natural gas tolerance of second gas flowmeter 5
Metric results between difference no more than second allow difference, then illustrate first outbound pipeline 2 second gas flowmeter 5
Metric results after the error range of permission, that is, second gas flowmeter 5 is not needed to be replaced or be repaired.At this
In the case of kind, the second gas flowmeter 5 on next outbound pipeline can be detected as the method previously described, until inspection
Until measuring the second gas flowmeter for needing replacing or repairing.
Measurement System of Natural Gas provided by the embodiment of the utility model includes enter the station pipeline, at least two outbound pipelines and extremely
Lack two review pipelines, every outbound pipeline at least two outbound pipelines is corresponding with a review pipeline.Using this day
It, can be by being mounted on the first gas flowmeter to enter the station on pipeline when right gas metering system measures the tolerance of natural gas
The total air inflow for the pipeline that enters the station is measured, and the second gas stream by being separately mounted at least two outbound pipelines
Meter divides displacement to measure natural gas in every outbound pipeline at least two outbound pipelines.When according to total air inlet
When the difference of the tolerance for the natural gas that the sum of amount and the tolerance of multiple points of displacements determine is more than acceptable error range, then close to
The first control valve on remaining outbound pipeline in addition to outbound pipeline to be detected in few two outbound pipelines, and open
Second checked on pipeline corresponding with remaining outbound pipeline at least two outbound pipelines in addition to outbound pipeline to be detected
Control valve carries out natural gas to remaining outbound pipeline in addition to outbound pipeline to be detected by review pipeline defeated
Gas.At this point, the second gas flowmeter on the metric results and outbound pipeline to be detected that pass through comparison first gas flowmeter
Metric results, then can determine whether the metric results of the second gas flowmeter on outbound pipeline to be detected accurate.Such as
The metric results of second gas flowmeter on the fruit outbound pipeline to be detected are accurate, then are continued by aforesaid operations to other
Outbound pipeline is detected, until finding out the second gas flowmeter on the outbound pipeline there are error.It can be seen that being at this
It, can be by first gas flowmeter gas flowmeter and second gas as a comparison when detecting the outbound pipeline of a certain item in system
The metric results of flowmeter compare, therefore reduce natural gas and enter the station gas flowmeter on pipeline and the outbound pipeline of natural gas
Installation number, saved cost of investment.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (8)
1. a kind of Measurement System of Natural Gas, which is characterized in that the Measurement System of Natural Gas includes enter the station pipeline (1), at least two
The outbound pipeline of item (2) and at least two review pipelines (3), every outbound pipeline (2) at least two outbound pipelines (2)
It is corresponding with a review pipeline (3)；
It is in series with first gas flowmeter (4) on the pipeline that enters the station (1), every at least two outbound pipelines (2)
Second gas flowmeter (5) and the first control valve (6) are in series on outbound pipeline (2), first control valve (6) is located at
The upstream end of the second gas flowmeter (5)；
Be in series with the second control valve (7) on every review pipeline (3) at least two review pipelines (3), it is described extremely
The first end of every review pipeline (3) in few two review pipelines (3) is connect with the pipeline that enters the station (1), and every described
The tie point of the first end and the pipeline that enters the station (1) of checking pipeline (3) is located at the upstream of the first gas flowmeter (4)
End, a plurality of second end for checking every review pipeline (3) in pipeline (3) and corresponding review pipeline (3) are corresponding outbound
Pipeline (2) connection, and the second end of every review pipeline (3) and the tie point of corresponding outbound pipeline (2) be located at it is corresponding out
It stands first control valve (6) on pipeline (2) and between the second gas flowmeter (5).
2. Measurement System of Natural Gas according to claim 1, which is characterized in that the essence of the first gas flowmeter (4)
Degree is higher than the precision of the second gas flowmeter (5).
3. Measurement System of Natural Gas according to claim 1, which is characterized in that the pipeline that enters the station (1) is also in series with two
A third control valve door (8), described two third control valve doors (8) are located at the two sides of the first gas flowmeter (4),
Described two third control valve doors (8) are used to control the opening and closing of pipeline (1) of entering the station.
4. Measurement System of Natural Gas according to claim 1, which is characterized in that at least two outbound pipelines (2)
Every outbound pipeline (2) be also in series at least one first control valve (6), at least one described first control valve (6)
Positioned at the downstream of the second gas flowmeter (5), at least one described first control valve (6) is corresponding outbound for controlling
The opening and closing of pipeline (2).
5. Measurement System of Natural Gas according to claim 1, which is characterized in that the Measurement System of Natural Gas further includes multiple
The first end of core total pipeline (9), review total pipeline (9) is connect with the pipeline that enters the station (1), at least two reviews pipe
The first end of every review pipeline (3) in road (3) is by connecting the second end for checking total pipeline (9) and the pipe that enters the station
Road (1) connection.
6. Measurement System of Natural Gas according to claim 5, which is characterized in that the review total pipeline (9) is in series with one
A 4th control valve (10), and concatenated 4th control valve (10) of review total pipeline (9) is for controlling the review
The opening and closing of total pipeline (9).
7. -6 any Measurement System of Natural Gas according to claim 1, which is characterized in that the first gas flowmeter
(4) and the second gas flowmeter (5) is gas ultrasonic flowmeter.
8. -6 any Measurement System of Natural Gas according to claim 1, which is characterized in that first control valve (6)
It is ball valve with second control valve (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135535.XU CN208833303U (en) | 2018-07-17 | 2018-07-17 | natural gas metering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135535.XU CN208833303U (en) | 2018-07-17 | 2018-07-17 | natural gas metering system |
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| CN208833303U true CN208833303U (en) | 2019-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485806A (en) * | 2022-01-25 | 2022-05-13 | 河北省水资源研究与水利技术试验推广中心 | Channel water measurement monitoring and pricing management method and system |
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2018
- 2018-07-17 CN CN201821135535.XU patent/CN208833303U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485806A (en) * | 2022-01-25 | 2022-05-13 | 河北省水资源研究与水利技术试验推广中心 | Channel water measurement monitoring and pricing management method and system |
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