CN116147740A - Gas verification standard device and standard meter verification method - Google Patents
Gas verification standard device and standard meter verification method Download PDFInfo
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- CN116147740A CN116147740A CN202211736204.2A CN202211736204A CN116147740A CN 116147740 A CN116147740 A CN 116147740A CN 202211736204 A CN202211736204 A CN 202211736204A CN 116147740 A CN116147740 A CN 116147740A
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- 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
Abstract
The application discloses a gas verification standard device and a standard meter verification method, wherein the gas verification standard device comprises a gas pumping unit, a temperature control unit, a standard comparison unit and a tested meter mounting platform; the gas pumping unit, the temperature control unit, the standard comparison unit and the checked meter mounting platform are connected in series on the same annular gas path; the standard comparison unit comprises a plurality of valve table assemblies which are arranged in parallel, and each valve table assembly comprises a standard table; the gas verification standard device also comprises a stop valve and a standard meter verification unit, wherein the stop valve is arranged on the annular gas path and is positioned at the upstream of the standard comparison unit; a gas access channel is arranged between the cut-off valve and the standard comparison unit, and the downstream of the standard comparison unit is communicated with a gas flow inlet of the standard meter verification unit. The gas verification standard device disclosed by the application can carry out online verification on the standard meter, and effectively improves the utilization rate of the gas verification standard device.
Description
Technical Field
The application belongs to the field of gas flow metering and verification, and particularly relates to a gas verification standard device and a standard meter verification method.
Background
This section provides only background information related to the present application and is not necessarily prior art.
Gas flow meters are widely used in various fields, and the gas flow meters need to be subjected to flow detection before use so as to achieve a prescribed metering accuracy. The existing gas verification standard device comprises a standard meter used as comparison, in order to ensure the detection precision of the gas verification standard device, the standard meter needs to be detached regularly and sent to a verification mechanism for verification work, the sending frequency of the standard meter is higher, the verification time is longer, the gas verification standard device cannot be used normally in the period, the detection work of a detected meter is seriously influenced, and meanwhile, the utilization rate of the gas verification standard device is lower. In addition, the gas verification standard device has higher requirements on tightness, and after the standard meter is disassembled and assembled, the leakage points are required to be debugged and checked again, so that great trouble is brought to verification work of the gas flowmeter; it is important if the standard meter can be completed without disassembly.
In addition, the gas flowmeter is usually calibrated through a gas calibration standard device, the current gas calibration standard device needs to be frequently replaced in the calibration process, and the calibration process is often in a high-pressure environment, so that new requirements on the safe operation of the gas calibration standard device are required. Moreover, in some cases, the detection gas is toxic gas, and if the detection gas is improperly operated, safety accidents are extremely easy to cause.
Disclosure of Invention
The application provides a gas verification standard device and a standard meter verification method, which aim to complete verification under the condition that a standard meter does not need to be disassembled, and improve the detection efficiency, the operation safety and the like of the gas verification standard device. The aim is achieved by the following technical scheme:
in a first aspect, the application discloses a gas verification standard device, which comprises a gas pumping unit, a temperature control unit, a standard comparison unit and a checked meter mounting platform; the gas pumping unit, the temperature control unit, the standard comparison unit and the checked meter mounting platform are connected in series on the same annular gas path; the standard comparison unit comprises a plurality of valve table assemblies which are arranged in parallel, and each valve table assembly comprises a standard table; the gas verification standard device also comprises a stop valve and a standard meter verification unit, wherein the stop valve is arranged on the annular gas path and is positioned at the upstream of the standard comparison unit; a gas access channel is arranged between the cut-off valve and the standard comparison unit, and the downstream of the standard comparison unit is communicated with a gas flow inlet of the standard meter verification unit.
According to the standard meter verification device, the standard meter verification unit is arranged, the standard meter can be verified under the condition that the standard meter is not dismounted, and then the on-line verification work of the standard meter is realized, so that the standard meter is simpler to detect, the verification efficiency of the standard meter is greatly improved, and the utilization rate of the gas verification standard device is improved.
As some preferred aspects of the present application, the standard meter verification unit is further optionally comprised of a plurality of verification assemblies in parallel, each verification assembly including a sonic nozzle assembly, an on-off valve, the sonic nozzle assembly and the on-off valve being in series communication.
The standard meter verification unit comprises a plurality of verification components which are connected in parallel, so that the verification requirements of standard meters with various measuring ranges can be met; meanwhile, the sonic nozzle assembly has long inspection period and lower verification cost. In addition, the sonic nozzle assembly has long inspection period, can carry out the inspection on the standard meter for a long time, can further improve the utilization rate of the gas inspection standard device, and simultaneously reduces the inspection cost of the standard meter.
As some preferred aspects of the present application, each sonic nozzle assembly is further selectively made to include a sonic nozzle, a temperature transducer, a first pressure transducer and a second pressure transducer, the temperature transducer and the first pressure transducer being disposed upstream of the sonic nozzle, the second pressure transducer being disposed downstream of the sonic nozzle.
According to the method, temperature information of air flow is acquired through the temperature transmitter, pressure information of the air flow is acquired through the first pressure transmitter and the second pressure transmitter, mass flow is converted through the acquired temperature information and pressure information, and whether the standard meter is qualified or not is judged.
As some preferred aspects of the present application, each assay component further optionally includes a flow control valve disposed downstream of the sonic nozzle included in the assay component.
According to the method, the flow rate of the gas flowing through the sonic nozzle is regulated by arranging the flow regulating valve, so that the problems of frosting, freezing blockage and the like caused by too large flow rate can be avoided; meanwhile, the flow rate of the fluid flowing through the sonic nozzle can be stabilized by adjusting the flow rate regulating valve.
As some preferred aspects of the present application, each valve table assembly further optionally further includes a first control switch and a second control switch, respectively, and the first control switch, the standard table, and the second control switch included in each valve table assembly are sequentially connected in series.
According to the method, the standard comparison unit comprises a plurality of valve table assemblies which are arranged in parallel, and further the valve table assemblies can be adjusted according to the types of the tables to be detected, so that the detection requirement of the tables to be detected is met; the gas verification standard device can be suitable for verification requirements of various detected meters, and has better universal applicability.
According to the method, the standard table is arranged between the first control switch and the second control switch, the standard table can be selected according to actual verification requirements, and when the selected standard table is used as a reference table for verification, the first control switch and the second control switch are in an open state; when the standard meter is not used as a reference meter for verification, the first control switch and the second control switch which are connected in series with the standard meter are in an off state so as to avoid damage to the standard meter in the verification process; meanwhile, the first control switch and the second control switch are arranged, so that the disassembly and assembly requirements of the standard meter can be met, and the damage to operators caused by high-pressure media in the annular gas circuit when the standard meter is disassembled is avoided.
As some preferred aspects of the present application, each valve gauge assembly further optionally includes a pressure balancing valve in parallel with the first control switch included in the associated valve gauge assembly or in parallel with the second control switch included in the associated valve gauge assembly.
According to the pressure balancing valve, the valve meter assembly comprises the pressure balancing valve, the pressure on two sides of the standard meter can be balanced under the action of the pressure balancing valve, and the impact on the standard meter caused by the connection of the annular gas circuit is avoided, so that the standard meter is included.
As some preferred schemes of the application, a pressure regulating unit is further arranged on the upstream of the gas access channel in a selective way, and the pressure regulating unit is communicated with the annular gas channel through a stop valve.
The pressure regulating unit is arranged, so that pressure can be regulated on gas injected into the annular gas circuit, and stable pressure can be provided for the annular gas circuit. In addition, the pressure regulating unit can provide stable detection gas for the verification of the standard meter when the standard meter is detected.
As some preferred aspects of the present application, the gas verification standard apparatus further optionally further comprises a chromatograph for detecting components of the gas; the chromatographic analyzer is arranged between the cut-off valve and the standard comparison unit.
The chromatographic analyzer can collect the component information of the gas so as to be used for mass flow conversion.
In a second aspect, the present application discloses a standard meter assay method comprising: receiving the detection gas supplied from the upstream of the standard comparison unit, and enabling the detection gas to enter the standard meter verification unit after passing through the standard meter to be verified; and judging whether the standard table to be verified is accurate or not according to the information acquired by the standard table verification unit.
As some preferred aspects of the present application, the step of verifying the information collected by the unit according to the standard table includes: converting mass flow Qm of the calibrated standard according to temperature information, pressure information and working condition flow information of fluid flowing through the calibrated standard 1 The method comprises the steps of carrying out a first treatment on the surface of the According to the temperature information, the pressure information and the working condition information acquired by the standard meter verification unit, the mass flow Qm flowing through the standard meter verification unit is converted 2 The method comprises the steps of carrying out a first treatment on the surface of the According to Qm 1 And Qm of 2 When the difference value is in the set error range, the standard table to be verified is qualified; according to Qm 1 And Qm of 2 And when the difference value exceeds the set error range, the standard table which is verified is failed.
The foregoing description is only an overview of the embodiments of the present application, and may be implemented in accordance with the content of the specification in order to make the technical means of the embodiments of the present application more clearly understood, and in order to make the above and other objects, features and advantages of the embodiments of the present application more comprehensible, the following detailed description of the present application will be presented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic layout of a gas verification standard device shown in the present application;
FIG. 2 is an enlarged partial view of the area A of FIG. 1;
FIG. 3 is an enlarged partial view of the area B of FIG. 1;
fig. 4 is a partial enlarged view of the area C in fig. 1.
The reference numerals are as follows:
1 a gas pumping unit;
2 a temperature control unit;
the system comprises a 3 standard comparison unit, a 31 first control switch, a 32 standard meter, a 321 temperature transmission module, a 322 pressure transmission module, a 33 second control switch and a 34 pressure balance valve;
4 a checked meter mounting platform, 41 a first pipeline, 411 a first switch, 412 a second switch, 42 a second pipeline, 421 a third switch, 422 a fourth switch and 43 a pressure release switch;
51 a first pressure balancing switch, 52 a second pressure balancing switch;
61 a first multi-way pipe, 62 a second multi-way pipe;
71 shut-off valve, 72 shut-off valve;
the system comprises an 8 standard meter verification unit, a 81 switch valve, a 82 sonic nozzle, a 83 flow regulating valve, a 84 temperature transmitter, a 85 first pressure transmitter and a 86 second pressure transmitter;
9, a pressure regulating unit;
a 10 chromatograph;
11 a filtering unit;
12 flow regulating unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.
In the embodiments of the present application, the same reference numerals denote the same components, and in the sake of brevity, detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.
The term "plurality" as used herein refers to more than two (including two).
The application discloses a gas verification standard device, as shown in fig. 1 to 4, comprising a gas pumping unit 1, a temperature control unit 2, a standard comparison unit 3 and a checked meter mounting platform 4; the gas pumping unit 1, the temperature control unit 2, the standard comparison unit 3 and the checked meter mounting platform 4 are connected in series on the same annular gas path; the standard comparing unit 3 comprises a plurality of valve table assemblies arranged in parallel, and each valve table assembly comprises a standard table 32; the gas verification standard device further comprises a stop valve 71 and a standard meter verification unit 8, wherein the stop valve 71 is arranged on the annular gas path and is positioned at the upstream of the standard comparison unit 3; a gas access channel is arranged between the cut-off valve 71 and the standard comparison unit 3, and the downstream of the standard comparison unit 3 is communicated with the gas flow inlet of the standard meter verification unit 8.
It should be noted that the gas verification standard device is used for verifying the flow of the instrument so as to determine whether the detected instrument meets the use requirement. The type of the instrument to be detected is not particularly limited, and may be an indicator for measuring the flow rate of one or more gases selected from the group consisting of air, oxygen, hydrogen, nitrogen, carbon dioxide, carbon monoxide, methane, and fuel gas; it should be noted that the gas detected by the meter under test is not limited to the above listed gas species.
It should be noted that, in the present application, the pumping unit 1 is not specifically limited, and may be any pumping unit that satisfies the circulation of gas in the annular gas path, and may specifically be a power fan. In addition, the temperature control unit 2 is not particularly limited, and may be any unit capable of controlling the temperature of the gas in the annular gas path; in the specific implementation, for example, the temperature control unit is selectively set as a unit that performs temperature control by a heat exchange system; the purpose of adjusting the temperature is achieved by controlling the flow rate of the cooling medium.
The standard comparing unit 3 in the present application is a reference unit for verifying the table to be inspected, and the information collected by the standard comparing unit 3 is used as a standard for judging whether the table to be inspected is qualified. In the specific implementation, the standard comparing unit 3 includes a standard table 32, and the information collected by the standard table 32 is used as a criterion for judging whether the inspected table meets the qualification standard.
As some preferred embodiments of the present application, in order to enable the device to work better, a filtering unit 11 may be further optionally disposed on the annular gas path, so as to filter out the foreign matters in the gas in the annular gas path, thereby ensuring the detection accuracy of the gas verification standard device.
As some preferred embodiments of the present application, the gas verification standard apparatus further optionally further comprises a chromatograph 10, the chromatograph 10 being configured to detect a component of the gas; the chromatograph 10 is provided between the shut-off valve 71 and the standard comparing unit 3. By arranging the chromatographic analyzer 10, the method can collect the component information of the gas for mass flow conversion.
In a specific implementation, in order to enable the flow rate of the gas flowing through the checked meter to be adjustable, the accuracy verification of various flow rates in the range of the checked meter is realized, and further, the gas verification standard device optionally comprises a flow rate adjusting unit 12, and the flow rate adjusting unit 12 is arranged in parallel with the standard comparing unit 3. In a specific verification process, the flow rate of the gas required for verification of the test meter is adjusted by adjusting the flow rate adjusting unit 12 according to the verification requirement of the test meter.
As some preferred embodiments of the present application, in order to be able to inject gas into the annular gas channel, a gas injection channel may be further provided on the annular gas channel; in order to inject the gas with a set pressure, in the embodiment, as shown in fig. 1, a pressure regulating unit 9 is disposed on the injection channel, and the gas can be injected into the annular gas path through the pressure regulating unit 9. Preferably, a stop valve 72 is arranged on the injection channel between the pressure regulating system and the annular gas circuit; the shut-off valve 72 is in an open state when output gas is required and the shut-off valve 72 is in a closed state when output gas is not required. The pressure regulating unit 9 is arranged, so that pressure can be regulated on gas injected into the annular gas circuit, and stable pressure can be provided for the annular gas circuit. In addition, the pressure regulating unit can provide stable detection gas for the verification of the standard meter when the standard meter is detected.
As some preferred embodiments of the present application, each valve table assembly further optionally includes a first control switch 31 and a second control switch 33, respectively, and the first control switch 31, the standard table 32, and the second control switch 33 included in each valve table assembly are sequentially connected in series.
According to the method, the standard comparison unit comprises a plurality of valve table assemblies which are arranged in parallel, and further the valve table assemblies can be adjusted according to the types of the tables to be detected, so that the detection requirement of the tables to be detected is met; the gas verification standard device can be suitable for verification requirements of various detected meters, and has better universal applicability.
The standard table 32 is arranged between the first control switch 31 and the second control switch 33, so that the standard table can be selected according to actual verification requirements, and when the selected standard table is used as a reference table for verification, the first control switch 31 and the second control switch 33 are in an open state; when the standard table is not used as a reference table for verification, the first control switch 31 and the second control switch 33 which are connected in series with the standard table 32 are in an off state so as to avoid damaging the standard table in the verification process; meanwhile, the first control switch 31 and the second control switch 33 are arranged, so that the disassembly and assembly requirements of the standard meter can be met, and the damage to operators caused by high-pressure media in the annular gas circuit when the standard meter is disassembled is avoided.
It should be noted that, the number of the valve table components in parallel arranged included in the standard comparing unit 3 is not particularly limited, and may be selectively set according to the measuring range of the table to be tested, and different situations may exist in the measuring range of the table to be tested. Therefore, the verification requirement of the checked meter can be met by connecting a plurality of valve meter assemblies in parallel. In the actual meter checking process, one valve meter assembly or a plurality of valve meter assemblies can be selectively connected according to the measuring range of the meter to be checked. In specific implementation, the valve table components connected in parallel with the standard comparison unit 3 can be selectively set to be two, three, four, five, six, seven, eight, nine or more than ten. It should be noted that, in the present application, a number above a certain value includes the present number, for example, ten or more include ten.
The types of the first control switch 31 and the second control switch 33 in the present application are not particularly limited, and may be a manual control switch or an electric control switch, and in particular, the first control switch 31 and the second control switch 33 are preferably controlled by a control unit.
According to the valve table assembly, the standard comparison unit 3 comprises a plurality of valve table assemblies which are arranged in parallel, and then the valve table assemblies can be adjusted according to the types of the detected tables, so that the detection requirements of the detected tables with different measuring ranges can be met, and the valve table assembly has better universal applicability.
As some preferred embodiments of the present application, each valve gauge assembly further optionally includes a pressure balancing valve 34, the pressure balancing valve 34 being connected in parallel with the first control switch 31 included in the valve gauge assembly. As an alternative embodiment, it is also possible to selectively connect the pressure equalization valve 34 in parallel with a second control switch 33 comprised by the associated valve table assembly.
When gas is injected into the annular gas path, the pressure balance valve 34 included in the valve table assembly of the standard table which is required to be used as a reference table can be selectively opened, so that the pressures at two sides of the standard table 32 are in a balanced state, and when the annular gas path is connected, the impact on the standard table is avoided, so that the standard table 32 is protected.
As some preferred embodiments of the present application, each standard meter 32 is further optionally provided with a temperature transmitting module 321, where the temperature transmitting module 321 is used for providing temperature information of the airflow; pressure transmitter modules 322 are provided on each standard meter 32, and the pressure transmitter modules 322 are used for providing pressure information of the air flow.
The standard meter 32 is provided with the temperature transmitting module 321 and the pressure transmitting module 322, so that temperature information and pressure information in the calibration process can be acquired, and flow conversion is carried out through the acquired temperature information and pressure information, so that a mass flow value is obtained.
As some preferred embodiments of the present application, at least some of the plurality of valve table assemblies are further selectively communicated upstream from the flow of gas via a first manifold 61; and the airflow downstream of the partial valve table assembly is communicated via a second manifold 62.
The first multi-way pipe 61 and the second multi-way pipe 62 are not particularly limited, and as an alternative embodiment, the first multi-way pipe 61 and the second multi-way pipe 62 may be selectively configured as a three-way pipe, a four-way pipe, a five-way pipe, a six-way pipe, a seven-way pipe, an eight-way pipe, or the like. In the concrete implementation, one interface of the multi-way pipe is communicated with a main pipeline of the annular gas circuit, and the other interfaces are respectively connected with a valve table assembly. As shown in fig. 1 and 3, the first multi-way pipe 61 and the second multi-way pipe 62 are respectively a three-way pipe, one interface of the three-way pipe is connected with the main pipeline of the annular gas circuit, and the other two interfaces are respectively connected with a valve meter assembly.
The first multi-way pipe 61 and the second multi-way pipe 62 are arranged, the plurality of standard meters 32 are connected in parallel, and air flow distribution is more uniform under the condition that detection needs of a detected meter with larger metering are realized.
As some preferred embodiments of the present application, the table mounting platform 4 further includes a first pipeline 41 and a second pipeline 42, and a table mounting position is arranged between the first pipeline 41 and the second pipeline 42; the first switch 411 and the second switch 412 are connected in series to the first pipeline 41, and the third switch 421 and the fourth switch 422 are connected in series to the second pipeline 42. Wherein the installation position of the checked meter is used for installing the checked meter.
Note that the first switch 411, the second switch 412, the third switch 421, and the fourth switch 422 are not particularly limited, and may be any switch that satisfies the requirements of turning on and off the flow path.
According to the gas meter, the gas pumping unit 1, the temperature control unit 2, the standard comparison unit 3 and the meter mounting platform 4 are connected in series on the same annular gas path, and only one switch is needed to be arranged on the first pipeline 41 and the second pipeline 42 respectively, so that gas media for detecting the meter can be reused, and the detection cost of the gas meter can be greatly reduced. Besides, the first switch 411 and the second switch 412 are connected in series on the first pipeline 41, the third switch 421 and the fourth switch 422 are connected in series on the second pipeline 42, and multiple protections are realized by controlling the first switch 411, the second switch 412, the third switch 421 and the fourth switch 422, so that the safety of the meter checking process can be effectively improved, and safety accidents are avoided.
As some preferred embodiments of the present application, one of the first switch 411 and the second switch 412 is further selectively set as an electronically controlled switch, and the other of the first switch 411 and the second switch 412 is set as a manual switch; one of the third switch 421 and the fourth switch 422 is set as an electronically controlled switch, and the other of the third switch 421 and the fourth switch 422 is set as a manual switch.
In the specific implementation, the electric control switch is further controlled by the control unit, and the manual switch is controlled in situ. Specifically, after the verification of the inspected meter is completed, the operator turns off the electric control switch arranged on the first pipeline 41 and turns off the electric control switch arranged on the second pipeline 42 through the control unit, and the operator goes to the site again and turns off the manual switch on the first pipeline 41 and turns off the manual switch on the second pipeline 42. And detaching the checked table when the checked table meets the condition of being detached. Then a new detected meter can be installed at the detected meter installation position, then a manual switch on the first pipeline 41 and a manual switch on the second pipeline 42 are started, then an electric control switch on the first pipeline 41 and an electric control switch on the second pipeline 42 are started through the control unit, and then verification of the detected meter is carried out; thus, the verification of the detected table is realized.
By setting one of the first switch 411 and the second switch 412 as an electric control switch, the other of the two is set as a manual switch; and one of the third switch 421 and the fourth switch 422 is set as an electric control switch, and the other one of the third switch 421 and the fourth switch 422 is set as a manual switch, so that the first pipeline 41 and the second pipeline 42 respectively need to be electrically controlled and manually operated to complete the work of switching on the annular gas circuit, and further the safety accident caused by misoperation of a detector can be effectively avoided.
As some preferred embodiments of the present application, the gas verification standard device further optionally further includes a pressure release switch 43, where the pressure release switch 43 is disposed on the gas path between the second switch 412 and the third switch 421. As shown in fig. 1 and 2, a pressure release switch 43 is disposed on the second pipeline 42; as an alternative embodiment, a pressure relief switch 43 may also optionally be provided on the first conduit 41.
The pressure release switch 43 in the present application is a switch provided to enable the test meter to be safely removed; specifically, when the table to be inspected needs to be detached from the annular gas path, the pressure between the second switch 412 and the third switch 421 is released through the pressure release switch 43. In a specific implementation, the pressure release switch 43 is preferably an electrically controlled pressure release valve, and the pressure release valve is controlled by the control unit, so as to avoid injury to operators caused by field operation.
As some preferred embodiments of the present application, the gas verification standard device further optionally includes a first pressure balance switch 51 and a second pressure balance switch 52, where the first pressure balance switch 51 is connected in parallel with the standard alignment unit 3; the second pressure balancing switch 52 is connected in parallel with the first switch 411 and the second switch 412 connected in series. As an alternative embodiment, the first pressure equalization switch 51 may also be connected in parallel with the standard comparison unit 3, and the second pressure equalization switch 52 may also be connected in parallel with the third switch 421 and the fourth switch 422 connected in series.
In a specific implementation, when gas needs to be injected into the annular gas path, the first pressure balance switch 51 and the second pressure balance switch 52 can be in an open state, so that the pressures at two sides of the standard meter 32 included in the inspected meter and the standard comparison unit 3 can be balanced, and further impact on the inspected meter and the standard meter 32 can be avoided when the annular gas path is connected, and the inspected meter and the standard meter 32 are damaged.
The utility model provides a through setting up first pressure balance switch 51, and then the gas that pours into in to annular gas circuit can make the standard compare the pressure of unit 3 both sides reach the balance, avoids forming great pressure differential at the fluid upstream end and the fluid downstream end that the standard compares unit 3, and then can avoid the air current to cause the impact to the standard table 32 that the standard compares unit 3 includes to protection standard table 32. Also, by providing the second pressure balance switch 52, the present application can avoid maintaining balance of pressure on both sides of the inspected meter, and then avoid impact on the inspected meter when the annular pipeline is connected, so as to protect the inspected meter.
In the specific implementation, when the standard meter 32 included in the standard comparing unit 3 needs to be checked, the annular gas path is cut off by the cut-off valve 71, so that the gas flows through the standard meter 32 to be checked in the standard comparing unit 3 and then flows through the standard meter checking unit 8, related information is further acquired from the checked standard meter 32 and the standard meter checking unit 8, and whether the standard meter 32 is accurate or not is further judged by taking the standard meter checking unit 8 as a reference.
According to the standard meter verification device, the standard meter verification unit 8 is arranged, the standard meter can be verified under the condition that the standard meter is not dismounted, and then the on-line verification work of the standard meter is realized, so that the verification of the standard meter is simpler, the verification efficiency of the standard meter is greatly improved, and the utilization rate of the gas verification standard device is further improved.
As some preferred embodiments of the present application, the standard meter verification unit is further optionally comprised of a plurality of verification assemblies in parallel, each verification assembly comprising a sonic nozzle assembly, an on-off valve 81, the sonic nozzle assembly and the on-off valve being in series communication.
It should be noted that, the present application is to meet the verification requirement of the standard table 32 by providing a plurality of verification components connected in parallel. Specifically, the standard comparison unit 3 includes different ranges of the standard meter 32, so in order for the standard meter 32 verification unit to meet the verification requirement, a plurality of verification components are connected in parallel to meet the verification match with the standard meter 32.
The standard meter verification unit comprises a plurality of verification components which are connected in parallel, so that the verification requirements of standard meters with various measuring ranges can be met; meanwhile, the sonic nozzle assembly has long inspection period and lower verification cost. In addition, the sonic nozzle assembly has long inspection period, can carry out the verification on the standard meter for a long time, can further improve the utilization rate of the gas verification standard device, and simultaneously reduces the verification cost of the standard meter.
As some preferred embodiments of the present application, each sonic nozzle assembly is further optionally comprised of a sonic nozzle 82, a temperature transducer 84, a first pressure transducer 85 and a second pressure transducer 86, the temperature transducer 84 and the first pressure transducer 85 being disposed upstream of the sonic nozzle 82 and the second pressure transducer 86 being disposed downstream of the sonic nozzle 82.
The temperature information of the air flow is acquired through the temperature transmitter 84, the pressure information of the air flow is acquired through the first pressure transmitter 85 and the second pressure transmitter 86, and the mass flow is converted through the acquired temperature information and pressure information and is used as a basis for judging whether the calibrated standard meter is qualified or not.
As some preferred embodiments of the present application, each assay component is further optionally provided with a flow regulating valve 83, the flow regulating valve 83 being provided downstream of the sonic nozzle 82 comprised by the assay component.
The problems of frosting, freezing and blocking and the like caused by too large flow can be avoided by arranging the flow regulating valve 83 to regulate the gas flow flowing through the sonic nozzle 82; meanwhile, the flow rate of the fluid flowing through the sonic nozzle 82 can be stabilized by adjusting the flow rate adjusting valve 83.
In a second aspect, the present application discloses a standard meter verification method, which is used for verifying a standard meter included in the gas verification standard device according to any one of the foregoing embodiments, specifically, a standard comparison unit 3 is provided with a detection gas upstream, so that the detection gas passes through a standard meter 32 to be verified and then enters a standard meter verification unit 8, and whether the standard meter to be verified is accurate is determined according to information collected by the standard meter verification unit 8.
Specifically, the mass flow Qm of the calibrated standard meter is further selectively converted according to the temperature information, the pressure information and the working condition flow information of the fluid flowing through the calibrated standard meter 1 The method comprises the steps of carrying out a first treatment on the surface of the According to the temperature information, the pressure information and the working condition information acquired by the standard meter verification unit 8, the mass flow Qm flowing through the standard meter verification unit 8 is converted 2 The method comprises the steps of carrying out a first treatment on the surface of the When Qm 1 And Qm of 2 When the difference value is in the set error range, the standard table to be verified is qualified; when Qm 1 And Qm of 2 And when the difference value exceeds the set error range, the standard table to be verified is not qualified.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A gas verification standard device is characterized in that,
the device comprises a gas pumping unit, a temperature control unit, a standard comparison unit and a checked meter mounting platform, wherein the gas pumping unit, the temperature control unit, the standard comparison unit and the checked meter mounting platform are connected in series on the same annular gas path, the standard comparison unit comprises a plurality of valve meter assemblies which are arranged in parallel, and each valve meter assembly comprises a standard meter;
the gas verification standard device further comprises a cut-off valve and a standard meter verification unit, wherein the cut-off valve is arranged on the annular gas path and is positioned at the upstream of the standard comparison unit; and a gas access channel is arranged between the cut-off valve and the standard comparison unit, and the downstream of the standard comparison unit is communicated with the gas flow inlet of the standard meter verification unit.
2. The gas verification standard device of claim 1, wherein,
the standard meter verification unit comprises one or a plurality of verification components connected in parallel, wherein each verification component comprises a sonic nozzle component and a switching valve, and the sonic nozzle component and the switching valve are communicated in series.
3. A gas verification standard device according to claim 2, wherein,
each sonic nozzle assembly comprises a sonic nozzle, a temperature transmitter, a first pressure transmitter and a second pressure transmitter, wherein the temperature transmitter and the first pressure transmitter are arranged at the upstream of the sonic nozzle, and the second pressure transmitter is arranged at the downstream of the sonic nozzle.
4. A gas verification standard device according to claim 3, wherein,
each verification assembly comprises a flow regulating valve which is arranged at the downstream of a sonic nozzle included in the verification assembly.
5. The gas verification standard device of claim 1, wherein,
each valve table assembly further comprises a first control switch and a second control switch, and the first control switch, the standard table and the second control switch of each valve table assembly are sequentially connected in series.
6. The gas verification standard device of claim 5, wherein,
each valve gauge assembly further comprises a pressure balancing valve connected in parallel with the first control switch comprised by the valve gauge assembly or connected in parallel with the second control switch comprised by the valve gauge assembly.
7. The gas verification standard device of claim 1, wherein,
the upstream of the gas access channel is provided with a pressure regulating unit, and the pressure regulating unit is communicated with the annular gas channel through a stop valve.
8. The gas verification standard device of claim 1, wherein,
the gas verification standard device further comprises a chromatographic analyzer, wherein the chromatographic analyzer is used for detecting components of gas; the chromatographic analyzer is arranged between the cut-off valve and the standard comparison unit.
9. A standard meter assay method implemented by the gas assay standard device of any one of claims 1 to 8, the standard meter assay method comprising:
receiving the detection gas supplied from the upstream of the standard comparison unit, and enabling the detection gas to enter the standard meter verification unit after passing through the standard meter to be verified;
and judging whether the standard table to be verified is accurate or not according to the information acquired by the standard table verification unit.
10. The method of claim 9, wherein the step of collecting information from the standard meter verification unit comprises:
converting mass flow Qm of the calibrated standard according to temperature information, pressure information and working condition flow information of fluid flowing through the calibrated standard 1 ；
According to the temperature information, the pressure information and the working condition information acquired by the standard meter verification unit, the mass flow Qm flowing through the standard meter verification unit is converted 2 ；
According to Qm 1 And Qm of 2 When the difference value is in the set error range, the standard table to be verified is qualified;
according to Qm 1 And Qm of 2 And when the difference value exceeds the set error range, the standard table which is verified is failed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211736204.2A CN116147740A (en) | 2022-12-30 | 2022-12-30 | Gas verification standard device and standard meter verification method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211736204.2A CN116147740A (en) | 2022-12-30 | 2022-12-30 | Gas verification standard device and standard meter verification method |
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| Publication Number | Publication Date |
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| CN116147740A true CN116147740A (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211736204.2A Pending CN116147740A (en) | 2022-12-30 | 2022-12-30 | Gas verification standard device and standard meter verification method |
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| Country | Link |
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| CN (1) | CN116147740A (en) |
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- 2022-12-30 CN CN202211736204.2A patent/CN116147740A/en active Pending
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