CN116878600A - Diaphragm gas meter and water inflow detection method thereof - Google Patents
Diaphragm gas meter and water inflow detection method thereof Download PDFInfo
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- CN116878600A CN116878600A CN202310804178.0A CN202310804178A CN116878600A CN 116878600 A CN116878600 A CN 116878600A CN 202310804178 A CN202310804178 A CN 202310804178A CN 116878600 A CN116878600 A CN 116878600A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 239000012528 membrane Substances 0.000 claims abstract description 93
- 238000012545 processing Methods 0.000 claims abstract description 62
- 238000005259 measurement Methods 0.000 claims abstract description 55
- 239000007789 gas Substances 0.000 claims description 422
- 238000000034 method Methods 0.000 claims description 19
- 239000002737 fuel gas Substances 0.000 claims description 4
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/08—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the diaphragm or bellows type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
A membrane gas meter, the membrane gas meter comprising: the gas meter comprises a shell, a diaphragm metering chamber, a distributing valve and a counter, wherein the counter is connected with the diaphragm and records the volume of gas flowing through the diaphragm gas meter through accumulated counting; the diaphragm gas meter further comprises a pressure detection assembly, a pressure sensor and a pressure sensor, wherein the pressure detection assembly is used for detecting the pressure difference between the air inlet and the air outlet to obtain an actual measurement pressure difference; the processing component receives the accumulated count of the counter, and when the accumulated count of the counter is increased, the processing component records the gas flowing through the diaphragm gas meter by a unit gas volume; the processing component is also used for recording the time spent by the gas flowing through the diaphragm gas meter in a unit gas volume, dividing the unit gas volume by the time to obtain a gas flow measurement value flowing through the diaphragm gas meter, and judging whether the diaphragm gas meter is filled with water according to the relation between the actually measured pressure difference and the gas flow measurement value. The diaphragm gas meter provided by the application can detect the water inflow condition of the diaphragm gas meter, thereby ensuring the metering accuracy of the diaphragm gas meter.
Description
Technical Field
The application relates to the technical field of meters, in particular to a membrane gas meter and a water inlet detection method of the membrane gas meter.
Background
The film type gas meter is applied to a gas pipeline and is a metering instrument for recording the actual consumption of gas. The diaphragm gas meter has the characteristics of accurate measurement, large measuring range ratio, safety, reliability, long service life and the like.
In the using process of the diaphragm gas meter, condensed water is condensed in a gas pipeline or other reasons can lead to water inflow in the gas meter, and the water inflow is less likely to lead to data detection errors of a gas meter counter, so that the metering accuracy of the gas meter is affected, and the benefits of a user and a gas company are affected; the gas meter can not work normally due to the fact that water is more fed. In the prior art, a membrane gas meter generally only detects the volume of gas passing through the membrane gas meter, and cannot identify the components of water in the membrane gas meter, so that the condition that the membrane gas meter enters water cannot be found and processed in time.
Disclosure of Invention
In order to solve the defects in the prior art, the application aims to provide a membrane type gas meter capable of detecting self water inflow and a water inflow detection method.
In order to achieve the above object, the present application provides a membrane gas meter, the membrane gas meter comprising:
the shell is provided with an air inlet and an air outlet;
the diaphragm metering chamber is arranged between the air inlet and the air outlet and comprises a diaphragm;
a distribution valve connected to the membrane;
the counter is connected with the diaphragm and records the volume of gas flowing through the diaphragm gas meter by accumulated counting;
the membrane gas meter also comprises a gas meter,
the pressure detection assembly is used for detecting the pressure difference between the air inlet and the air outlet to obtain the actually measured pressure difference;
the processing component is connected with the counter, receives the accumulated count of the counter, and records the gas flowing through a unit gas volume of the diaphragm gas meter when the accumulated count of the counter is increased;
the processing component is also used for recording the time spent by the gas flowing through the diaphragm gas meter in a unit gas volume, dividing the unit gas volume by the time to obtain a gas flow measurement value flowing through the diaphragm gas meter, and judging whether the diaphragm gas meter is filled with water according to the relation between the actually measured pressure difference and the gas flow measurement value.
Further, the diaphragm gas meter further comprises a storage component, and the storage component stores the corresponding relation between the detected pressure difference and the gas flow in the state that the diaphragm gas meter is not in water;
the processing component is used for acquiring a gas flow measurement value flowing through the diaphragm gas meter when water inflow detection is carried out, and acquiring a theoretical pressure difference between an air inlet and an air outlet of the diaphragm gas meter according to the corresponding relation;
the processing component is also used for acquiring the actual measurement pressure difference between the air inlet and the air outlet of the membrane gas meter, calculating the offset degree between the actual measurement pressure difference and the theoretical pressure difference, and judging the water inflow of the membrane gas meter when the offset degree is greater than or equal to a preset pressure offset degree threshold value.
Further, the processing component is also used for obtaining the actual gas flow flowing through the diaphragm gas meter according to the actual measured pressure difference and the corresponding relation;
the processing assembly is further configured to correct the measured gas volume of the diaphragm gas meter based on the actual gas flow when the diaphragm gas meter is judged to be in water.
Further, the diaphragm gas meter further comprises an alarm component, and when the processing component judges that the diaphragm gas meter is in water, the alarm component uploads alarm information.
Further, the diaphragm gas meter further comprises a storage component, and the storage component stores the corresponding relation between the detected pressure difference and the gas flow in the state that the diaphragm gas meter is not in water;
the processing component is configured to obtain the actual gas flow of the diaphragm gas meter according to the actual measured pressure difference and the corresponding relation;
the processing component is also used for calculating the offset between the actual gas flow and the gas flow measurement value, and when the offset is greater than or equal to a preset gas flow offset threshold value, the processing component judges that the membrane gas meter is in water.
The application also provides a water inflow detection method of the diaphragm gas meter, which comprises the following steps:
obtaining the actually measured pressure difference between the air inlet and the air outlet of the diaphragm gas meter;
the method comprises the steps of obtaining the length of time for a diaphragm gas meter to flow through a unit gas volume of fuel gas, and dividing the unit gas volume by the length of time to obtain a gas flow measurement value of the diaphragm gas meter;
and judging whether the diaphragm gas meter is water inlet or not according to the relation between the actually measured pressure difference and the gas flow measurement value.
Further, the method further comprises:
acquiring pressure differences between an air inlet and an air outlet under different gas flows in a state that the membrane gas meter does not feed water so as to establish a corresponding relation between the pressure differences and the gas flows;
acquiring a gas flow measurement value flowing through the diaphragm gas meter, and acquiring a theoretical pressure difference between an air inlet and an air outlet of the diaphragm gas meter according to the gas flow measurement value and the corresponding relation;
and obtaining the actual measured pressure difference, calculating the offset between the actual measured pressure difference and the theoretical pressure difference, and judging that the membrane gas meter is fed when the offset is greater than or equal to a preset pressure offset threshold value.
Further, the method further comprises:
when the film gas meter is judged to be fed with water, acquiring the actual gas flow flowing through the film gas meter based on the actually measured pressure difference and the corresponding relation;
and correcting the gas volume measured by the diaphragm gas meter according to the actual gas flow.
Further, the method further comprises:
acquiring the volume of gas flowing in unit time recorded by a diaphragm gas meter, and acquiring a gas flow measurement value according to the volume of gas flowing in unit time;
calculating the ratio of the actual gas flow to the gas flow measurement value to obtain a proportionality coefficient;
and acquiring the gas volume recorded by the diaphragm gas meter, and multiplying the gas volume by a proportionality coefficient to obtain the corrected gas volume.
Further, in the state that the membrane gas meter does not feed water, acquiring the pressure difference between the gas inlet and the gas outlet under different gas flows so as to establish the corresponding relation between the pressure difference and the gas flow;
according to the actually measured pressure difference and the corresponding relation, the actual gas flow of the diaphragm gas meter is obtained;
calculating the offset between the actual gas flow and the gas flow measurement value, and judging the water inflow of the membrane gas meter by the processing component when the offset is larger than or equal to a preset gas flow offset threshold value.
The membrane gas meter and the water inflow detection method provided by the application can detect the water inflow condition in the membrane gas meter, thereby improving the metering accuracy of the membrane gas meter.
Drawings
Fig. 1 is a schematic structural view of a membrane gas meter of the present application.
Fig. 2 is a schematic cross-sectional view of the diaphragm gas meter of the present application.
Fig. 3 is a schematic diagram of the correspondence between the detected pressure difference and the gas flow rate in the state of no water inlet of the membrane gas meter according to the present application.
Fig. 4 is a schematic flow chart of a method for detecting water inflow of the membrane gas meter.
Fig. 5 is a schematic flow chart of another method for detecting water inflow of the membrane gas meter.
Fig. 6 is a schematic flow chart of gas volume correction of the diaphragm gas meter of the application.
FIG. 7 is a schematic diagram of another flow chart of gas volume correction of the diaphragm gas meter of the present application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the technical solutions in the specific embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application.
As shown in fig. 1 and 2, a diaphragm gas meter 100 for gas metering, the diaphragm gas meter 100 includes a housing 11, a diaphragm metering chamber 12, a distribution valve 13, and a counter 14. The housing 11 is used to protect the internal components of the diaphragm gas meter 100, and the housing 11 is provided with an air inlet 111 and an air outlet 112. The diaphragm metering chamber 12 is disposed between the air inlet 111 and the air outlet 112, and the gas enters the diaphragm metering chamber 12 having a constant volume from the air inlet 11 and is discharged from the air outlet 112 after being filled, and the diaphragm metering chamber 12 includes a diaphragm 121. The distribution valve 13 is connected to the membrane 121, and the distribution valve 13 is used for distributing the fuel gas. The counter 14 is connected to the diaphragm 121, and the counter 14 records the volume of gas flowing through the diaphragm gas meter 100 by accumulating counts. Through the arrangement, the diaphragm 121 moves in the diaphragm metering chamber 12 under the action of the pressure difference generated at the two ends of the air inlet 111 and the air outlet 112, and drives the distributing valve 13 to perform coordinated air distribution, so that the diaphragm 121 can continuously reciprocate and drive the counter 14 to count, and when the accumulated count of the counter 14 is added, the diaphragm gas meter can be considered to flow through the gas of a unit gas volume.
As an implementation manner, the membrane gas meter 100 further includes a pressure detecting component 15 and a processing component 16, where the pressure detecting component 15 is configured to detect a pressure difference between the gas inlet 111 and the gas outlet 112, and obtain a measured pressure difference.
The processing component 16 is connected to the counter 14, and the processing component 16 can receive the accumulated count of the counter 14, and when the accumulated count of the counter 14 is increased, the processing component 16 records the gas flowing through the membrane gas meter 100 by a unit gas volume. The processing assembly 16 further records a time period for the membrane gas meter 100 to flow through a unit volume of gas, and the processing assembly 16 is further configured to divide the unit volume of gas by the time period to obtain a gas flow measurement value for the membrane gas meter 100, and determine whether the membrane gas meter 100 is water according to a relationship between the measured pressure difference and the gas flow measurement value.
Specifically, when water is not fed into the membrane gas meter 100, a certain proportional relationship exists between the pressure difference between the gas inlet 111 and the gas outlet 112 and the measured value of the gas flow rate flowing through the membrane gas meter 100, and the proportional relationship can be obtained through experiments. When water is fed into the membrane gas meter 100, the gas flow rate measurement value flowing through the membrane gas meter 100 becomes large, resulting in unbalance of the proportional relationship between the pressure difference between the gas inlet 111 and the gas outlet 112 and the gas flow rate measurement value flowing through the membrane gas meter 100, and therefore, whether the membrane gas meter 100 is water-fed can be judged by whether the proportional relationship between the measured pressure difference between the gas inlet 111 and the gas outlet 112 and the gas flow rate measurement value flowing through the membrane gas meter 100 is unbalanced. Through the arrangement, the membrane gas meter 100 can detect the water inflow condition of the membrane gas meter 100, so that the metering accuracy of the membrane gas meter 100 is improved, and the benefit of a user is maintained.
As an implementation manner, the membrane gas meter 100 further includes a storage component 17, where the storage component 17 stores a correspondence relationship between a pressure difference detected in a state where the membrane gas meter 100 is not in water and a gas flow. When the water inflow detection is performed, the processing component 16 may obtain a measured value of the gas flow flowing through the membrane gas meter 100, and obtain a theoretical pressure difference between the gas inlet 111 and the gas outlet 112 of the membrane gas meter 100 according to the corresponding relationship, where the theoretical pressure difference is a pressure difference due to the gas flow flowing through the membrane gas meter 100 calculated according to the corresponding relationship when the gas flow flowing through the membrane gas meter 100 is the measured value of the gas flow. The processing component 16 obtains the measured pressure difference detected by the pressure detecting component 15, calculates the deviation degree between the measured pressure difference and the theoretical pressure difference, and when the deviation degree is greater than or equal to the preset pressure deviation degree threshold value, the processing component 16 can determine that the membrane gas meter 100 is water-in.
As shown in fig. 3, which exemplarily shows a correspondence relationship between the pressure difference P detected by the diaphragm gas meter 100 in a state where water is not fed and the gas flow rate Q, the correspondence relationship may be expressed by the following formula: p=f (Q), where P represents the pressure difference and Q represents the gas flow rate. As an alternative implementation, the correspondence between the pressure difference P and the gas flow Q may be obtained from a large number of experimental data analyses.
The processing assembly 16 is configured to obtain a measured pressure difference P1 between a measured gas flow value Q2 through the diaphragm gas meter 100 and the gas inlet 111 and the gas outlet 112 of the diaphragm gas meter 100 when water intake detection is performed. The processing assembly 16 may substitute the gas flow measurement Q2 into the correspondence p=f (Q) to calculate the theoretical pressure difference p2=f (Q2) between the gas inlet 111 and the gas outlet 112 of the diaphragm gas meter 100. The processing component 16 then calculates the degree of offset between the measured pressure differential P1 and the theoretical pressure differential P2, which may be expressed by the following equation:
S＝(P2-P1)/P2，
in the formula, S represents the degree of deviation between the actual pressure difference P1 and the theoretical pressure difference P2, P1 represents the actual pressure difference, and P2 represents the theoretical pressure difference.
When the offset S is greater than or equal to the preset pressure offset threshold, the processing component 16 determines that the diaphragm gas meter 100 is in water. When the offset S is less than the preset pressure offset threshold, the processing component 16 determines that the diaphragm gas meter 100 is not in water.
As an alternative implementation, the preset pressure offset threshold is greater than or equal to 0.03 and less than or equal to 0.1. In the present embodiment, the preset threshold is set to 0.05. Through the arrangement, the situation that the membrane gas meter 100 misjudges the water inlet of the membrane gas meter 100 due to reasonable errors caused by the fact that the preset threshold value is too small can be avoided, and therefore the accuracy of detecting the water inlet of the membrane gas meter 100 is improved; the sensitivity of the membrane gas meter 100 to detection of the water inflow condition itself can also be prevented from being reduced due to the preset threshold value being set too large.
As another alternative implementation, the processing assembly 16 may be configured to obtain the actual gas flow of the diaphragm gas meter 100 from the measured pressure differential in combination with the correspondence;
the processing component is further configured to calculate a deviation between the actual gas flow and the gas flow measurement, and when the deviation is greater than or equal to a preset gas flow deviation threshold, the processing component 16 determines that the membrane gas meter 100 is in water.
Specifically, the processing component 16 may substitute the measured pressure difference detected by the pressure detecting component 15 into the corresponding relationship, invert to obtain the actual gas flow Q1 of the membrane gas meter 100, calculate the offset between the actual gas flow Q1 and the gas flow measurement Q2, and when the offset is greater than or equal to the preset gas flow offset threshold, the processing component 16 determines that the membrane gas meter 100 is water.
The degree of offset between the actual gas flow Q1 and the gas flow measurement Q2 can be expressed by the following formula:
H＝(Q2-Q1)/Q2，
where H represents the degree of offset between the actual gas flow rate Q1 and the gas flow rate measurement value Q2.
As an implementation manner, when the film gas meter 100 is judged to be water-in, the processing component 16 obtains the actual gas flow rate flowing through the film gas meter 100 based on the actually measured pressure difference and the corresponding relationship, and the processing component corrects the gas volume measured by the film gas meter 100 according to the actual gas flow rate.
Specifically, when the processing module 16 determines that the membrane gas meter 100 is water-in, the processing module 16 obtains an actual gas flow rate q1=f' (P1) from the pressure difference P1 between the actually measured gas inlet 111 and the gas outlet 112 and the correspondence relationship p=f (Q) between the pressure difference P and the gas flow rate Q in the state of no water-in. The processing assembly 16 may obtain the actual gas volume V1 from the actual gas flow Q1 to correct the measured gas volume V2 of the diaphragm gas meter 100.
Alternatively, the processing component 16 obtains the volume of gas flowing in a unit time recorded by the diaphragm gas meter 100, and obtains a gas flow measurement Q1 according to the volume of gas flowing in the unit time, the processing component 16 calculates the ratio of the actual gas flow Q1 to the gas flow measurement Q2 again, obtains a proportionality coefficient k=q1/Q2, and then obtains a corrected gas volume v2=kv1, that is v2=q1/q2×v1 by multiplying the gas volume V1 by the proportionality coefficient K. Through the arrangement, the diaphragm gas meter 100 can obtain accurate gas volume, and the measured gas volume can be corrected in time when water is fed, so that the influence of water feeding on gas volume statistics is eliminated, the metering accuracy is improved, and the loss of a user is reduced.
As an alternative implementation, the diaphragm gas meter 100 further includes an alarm assembly 18, and when the processing assembly 16 determines that the diaphragm gas meter 100 is in water, the alarm assembly 18 uploads alarm information. Through the arrangement, the membrane gas meter 100 can immediately upload the water inlet condition of the membrane gas meter 100 to a user, so that the user can timely find and process the water inlet condition, and the membrane gas meter 100 can keep normal work and maintain benefits of the user.
As shown in fig. 4, a method for detecting water inflow of a membrane gas meter 100 includes the steps of:
s1, acquiring the actual measured pressure difference between an air inlet 111 and an air outlet 112 of the diaphragm gas meter 100;
s2, acquiring the length of time for the membrane gas meter 100 to flow through a unit gas volume, and dividing the unit gas volume by the length of time to obtain a gas flow measurement value flowing through the membrane gas meter 100;
and S3, judging whether the membrane type gas meter 100 is water inlet or not according to the obtained relation between the actually measured pressure difference and the gas flow measurement value.
As shown in fig. 5, specifically, the method for detecting water inflow of the membrane gas meter 100 includes the steps of:
s11, under the state that the membrane gas meter 100 does not feed water, acquiring the pressure difference between the gas inlet 111 and the gas outlet 112 under different gas flows so as to establish the corresponding relation between the pressure difference and the gas flow.
S12, obtaining a gas flow measurement value flowing through the diaphragm gas meter 100, and obtaining a theoretical pressure difference between the gas inlet 111 and the gas outlet 112 of the diaphragm gas meter 100 according to the gas flow measurement value and the corresponding relation.
S13, acquiring an actual measurement pressure difference, calculating the deviation degree between the actual measurement pressure difference and the theoretical pressure difference, and judging that the membrane gas meter 100 is in water when the deviation degree is larger than or equal to a preset pressure deviation degree threshold value. Wherein the measured pressure differential may be obtained by the pressure sensing assembly 15.
As an alternative implementation, the preset pressure offset threshold is greater than or equal to 0.03 and less than or equal to 0.1. In the present embodiment, the preset pressure deviation threshold value is set to 0.05.
As another alternative implementation, the method for detecting water inflow of the membrane gas meter 100 may include the following steps:
in a state that the membrane gas meter 100 does not feed water, acquiring pressure differences between the gas inlet 111 and the gas outlet 112 under different gas flows to establish a corresponding relationship between the pressure differences and the gas flows;
obtaining the actual gas flow of the diaphragm gas meter 100 according to the actually measured pressure difference and the corresponding relation;
calculating the offset between the actual gas flow and the gas flow measurement value, and judging the water inflow of the membrane gas meter by the processing component when the offset is larger than or equal to a preset gas flow offset threshold value.
As an alternative implementation, the preset gas flow offset threshold is greater than or equal to 0.03 and less than or equal to 0.1. In the present embodiment, the preset gas flow rate deviation threshold value is set to 0.05.
As shown in fig. 6, the method for detecting water inflow of the membrane gas meter 100 further includes correcting a gas volume, and includes the steps of:
s21, when the film gas meter 100 is judged to be water-in, obtaining an actual gas flow rate q1=f' (P1) flowing through the film gas meter 100 based on the measured pressure difference P1 and the corresponding relationship p=f (Q);
s22, obtaining an actual gas volume V1 according to the actual gas flow Q1, and correcting the gas volume V2 measured by the diaphragm gas meter 100.
As shown in fig. 7, the method for correcting the gas volume further includes:
s31, acquiring the volume of gas flowing in unit time recorded by the diaphragm gas meter 100, and acquiring a gas flow measurement Q2 according to the volume of gas flowing in unit time;
s32, calculating the ratio of the actual gas flow Q1 to the gas flow measurement Q2 to obtain a proportionality coefficient K=Q1/Q2;
and S33, acquiring a gas volume V1 recorded by the diaphragm gas meter 100, and multiplying the gas volume V1 by a proportionality coefficient K to obtain a corrected gas volume V2=KxV1.
In order to further describe the diaphragm gas meter 100 provided in the embodiment of the present application, the following description will be made with reference to a method for using the diaphragm gas meter 100:
the storage unit 17 of the membrane gas meter 100 stores a correspondence relationship between the pressure difference between the gas inlet 111 and the gas outlet 112 detected in the state where the membrane gas meter 100 is not in water and the flow rate of the gas flowing through the membrane gas meter 100, which can be obtained by analysis based on a large amount of experimental data.
The processing component 16 firstly obtains a gas flow measurement value of the gas flowing through the diaphragm gas meter 100 according to the gas volume in unit time recorded by the counter 14, then the processing component 16 obtains a theoretical pressure difference between the gas inlet 111 and the gas outlet 112 according to the gas flow measurement value through the corresponding relation stored by the storage component 17, finally the processing component 16 calculates a deviation degree between the theoretical pressure difference and the actual pressure difference according to the actual pressure difference measured by the pressure detection component 15, and when the deviation degree is greater than or equal to 0.05, the processing component 16 judges that the diaphragm gas meter 100 is in water, and reports the water inlet information to the alarm component 18.
When the processing component 16 determines that the diaphragm gas meter 100 is water-in, the processing component 16 obtains a theoretical gas flow measurement value according to the corresponding relationship between the actual pressure difference measured by the pressure detecting component 15 and the stored value stored by the storage component 17, and then the processing component 16 obtains a proportionality coefficient K by calculating the ratio of the actual gas flow to the gas flow measurement value. The final processing assembly 16 multiplies the gas volume recorded by the diaphragm gas meter 100 by a scaling factor to obtain a corrected gas volume.
According to the diaphragm gas meter 100, the pressure detection assembly 15, the processing assembly 16 and the storage assembly 17 are matched, so that the water inlet condition in the diaphragm gas meter 100 can be detected, the metering accuracy of the diaphragm gas meter 100 is improved, and the benefit of a user is maintained. In the application, the membrane gas meter 100 further comprises an alarm component 18, which can upload the water inlet condition of the membrane gas meter 100 to a user, so that the user can find and process in time, thereby being beneficial to the normal operation of the membrane gas meter 100. In addition, the application also provides a water inlet detection method of the diaphragm gas meter 100, which can accurately detect whether water is inlet in the diaphragm gas meter 100 and correct the volume of gas measured by the diaphragm gas meter 100 which is already inlet, so that the loss of a user is reduced.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (10)
1. A membrane gas meter, the membrane gas meter comprising:
the shell is provided with an air inlet and an air outlet;
the diaphragm metering chamber is arranged between the air inlet and the air outlet and comprises a diaphragm;
a dispensing valve connected to the diaphragm;
the counter is connected with the diaphragm and records the volume of gas flowing through the diaphragm gas meter through accumulated counting;
it is characterized in that the membrane type gas meter also comprises,
the pressure detection assembly is used for detecting the pressure difference between the air inlet and the air outlet to obtain an actual measurement pressure difference;
the processing component is connected with the counter, receives the accumulated count of the counter, and records the gas flowing through the membrane gas meter by a unit gas volume when the accumulated count of the counter is increased;
the processing component is also used for recording the time length for the diaphragm gas meter to flow through the fuel gas of the unit gas volume, dividing the unit gas volume by the time length to obtain a gas flow measurement value flowing through the diaphragm gas meter, and judging whether the diaphragm gas meter is filled with water according to the relation between the measured pressure difference and the gas flow measurement value.
2. A diaphragm gas meter as claimed in claim 1, wherein,
the diaphragm gas meter further comprises a storage component, wherein the storage component stores the corresponding relation between the detected pressure difference and the gas flow in the state that the diaphragm gas meter does not enter water;
the processing component is used for acquiring a gas flow measurement value flowing through the diaphragm gas meter when water inflow detection is carried out, and acquiring a theoretical pressure difference between an air inlet and an air outlet of the diaphragm gas meter according to the corresponding relation;
the processing component is further used for obtaining the actual measurement pressure difference between the air inlet and the air outlet of the diaphragm gas meter, calculating the offset degree between the actual measurement pressure difference and the theoretical pressure difference, and judging that water enters the diaphragm gas meter when the offset degree is greater than or equal to a preset pressure offset degree threshold value.
3. A diaphragm gas meter as claimed in claim 2, wherein,
the processing component is also used for obtaining the actual gas flow flowing through the diaphragm gas meter according to the actual measured pressure difference and the corresponding relation;
the processing assembly is further configured to correct the volume of gas measured by the diaphragm gas meter based on the actual gas flow when the diaphragm gas meter is judged to be in water.
4. A diaphragm gas meter as claimed in claim 1, wherein,
the diaphragm gas meter further comprises an alarm component, and when the processing component judges that the diaphragm gas meter is in water inlet, the alarm component uploads alarm information.
5. A diaphragm gas meter as claimed in claim 1, wherein,
the diaphragm gas meter further comprises a storage component, wherein the storage component stores the corresponding relation between the detected pressure difference and the gas flow in the state that the diaphragm gas meter does not enter water;
the processing component is configured to obtain the actual gas flow of the diaphragm gas meter according to the actual measured pressure difference and the corresponding relation;
the processing component is also used for calculating the offset between the actual gas flow and the gas flow measurement value, and when the offset is greater than or equal to a preset gas flow offset threshold value, the processing component judges that the membrane gas meter is in water.
6. The water inflow detection method of the diaphragm gas meter is characterized by comprising the following steps of:
obtaining the actually measured pressure difference between the air inlet and the air outlet of the diaphragm gas meter;
acquiring the time length for the diaphragm gas meter to flow through a unit gas volume of fuel gas, and dividing the unit gas volume by the time length to acquire a gas flow measurement value flowing through the diaphragm gas meter;
and judging whether the membrane type gas meter is water inlet or not according to the relation between the actually measured pressure difference and the gas flow measurement value.
7. The method for water inlet detection of a membrane gas meter of claim 6, further comprising:
acquiring pressure differences between the air inlet and the air outlet under different gas flows in a state that the membrane gas meter does not feed water so as to establish a corresponding relation between the pressure differences and the gas flows;
acquiring a gas flow measurement value flowing through the membrane gas meter, and acquiring a theoretical pressure difference between an air inlet and an air outlet of the membrane gas meter according to the gas flow measurement value and the corresponding relation;
and acquiring the actual measured pressure difference, calculating the offset between the actual measured pressure difference and the theoretical pressure difference, and judging that the membrane gas meter is fed when the offset is greater than or equal to a preset pressure offset threshold.
8. The method for water inlet detection of a membrane gas meter of claim 7, further comprising:
when the film gas meter is judged to be fed with water, acquiring the actual gas flow flowing through the film gas meter based on the actually measured pressure difference and the corresponding relation;
and correcting the gas volume measured by the diaphragm gas meter according to the actual gas flow.
9. The method for water inlet detection of a membrane gas meter of claim 8, further comprising:
acquiring the volume of gas flowing in unit time recorded by the diaphragm gas meter, and acquiring a gas flow measurement value according to the volume of gas flowing in unit time;
calculating the ratio of the actual gas flow to the gas flow measurement value to obtain a proportionality coefficient;
and acquiring the gas volume recorded by the diaphragm gas meter, and multiplying the gas volume by the proportionality coefficient to obtain the corrected gas volume.
10. The method for detecting water inflow of a membrane gas meter according to claim 6, wherein,
acquiring pressure differences between the air inlet and the air outlet under different gas flows in a state that the membrane gas meter does not feed water so as to establish a corresponding relation between the pressure differences and the gas flows;
according to the actually measured pressure difference and the corresponding relation, obtaining the actual gas flow of the diaphragm gas meter;
calculating the offset between the actual gas flow and the gas flow measured value, and judging the water inflow of the diaphragm gas meter by the processing component when the offset is larger than or equal to a preset gas flow offset threshold value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804178.0A CN116878600A (en) | 2023-07-03 | 2023-07-03 | Diaphragm gas meter and water inflow detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804178.0A CN116878600A (en) | 2023-07-03 | 2023-07-03 | Diaphragm gas meter and water inflow detection method thereof |
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| Publication Number | Publication Date |
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| CN116878600A true CN116878600A (en) | 2023-10-13 |
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| CN202310804178.0A Pending CN116878600A (en) | 2023-07-03 | 2023-07-03 | Diaphragm gas meter and water inflow detection method thereof |
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| Country | Link |
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| CN (1) | CN116878600A (en) |
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