CN113588029A - Real flow split testing device and method - Google Patents
Real flow split testing device and method Download PDFInfo
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- CN113588029A CN113588029A CN202110863072.9A CN202110863072A CN113588029A CN 113588029 A CN113588029 A CN 113588029A CN 202110863072 A CN202110863072 A CN 202110863072A CN 113588029 A CN113588029 A CN 113588029A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F5/00—Measuring a proportion of the volume flow
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Abstract
The embodiment of the invention provides a real current split testing device and a method, and relates to the technical field of fluid detection. The real-flow split-flow testing device comprises a flowmeter and a split-flow meter, wherein the flowmeter comprises a pipe body, a pore plate and a sensor, the pore plate is arranged at an inlet of the pipe body, and the sensor is arranged inside the pipe body; the reposition of redundant personnel meter is the cylinder structure, and the inside at the body is installed to the reposition of redundant personnel meter, and the central line collineation setting of the central line of reposition of redundant personnel meter and body, the sensor inserts the inside of reposition of redundant personnel meter. The real-flow distribution testing device replaces testing after the flow divider is assembled on the flowmeter, meanwhile, the real-flow testing on low pressure and large flow is realized on the basis of a distribution principle, and the testing is convenient, reliable and accurate.
Description
Technical Field
The invention relates to the technical field of fluid detection, in particular to a real current splitting test device and a method.
Background
The thermal gas mass flowmeter is one of the current research hotspots, most of the domestic and foreign researches on the thermal gas mass flow are to measure the gas with micro flow, and the researches on the real flow test of the gas flow with large flow are less.
In the prior art, an experimental device for measuring liquid flow in a pipeline is designed by using a branch pipe flow measurement method, flow measurement is carried out on a plurality of pump stations, a multiple relation between the main pipeline and the flow of branch pipes is obtained, and then the flow multiple is obtained through comparison calculation; a structural model for measuring air flow is designed by a branch pipe flow measuring method, and a hole plate type throttling device is installed in the main pipeline, so that different measuring ranges are achieved; a small flow channel is designed in the flow channel of the flowmeter, the flow speed of the test section of the small flow channel and the average flow speed of the air inlet pipe form a fixed proportionality coefficient, and the air inflow is obtained by testing the flow speed in the small flow channel; the pipeline structure of the novel heat distribution type mass flow meter is designed, the pipeline structure of the branch pipe flow measuring method flow meter suitable for measuring the liquid mass flow is obtained through data analysis, and a certain theoretical basis is provided for researching the heat distribution type mass flow measuring method based on the branch pipe flow measuring method; a constant-power thermal gas mass flowmeter with branch pipes and a porous rectifier is also designed and developed, and the mass flow of fluid in a pipeline is reflected by using the temperature difference measured by a sensor; and a thermal mass flowmeter combining a constant temperature difference method and a constant power method is developed, the constant temperature difference method and the constant power method are switched according to the magnitude of the branch current of the speed probe to measure the air flow, and the measuring range of the flowmeter is widened.
Most of the above researches utilize a branch pipe flow measurement method to obtain the performance of the whole meter by measuring the flow on the branch pipe, the measuring range of the flow meter is effectively improved, but the range of the measured flow is still small. However, the low-pressure large-flow meter cannot be subjected to real-flow test because the market lacks low-pressure large-flow real-flow test equipment, and the maximum test flow of the real-flow test equipment can only reach 40 cubic per hour.
Disclosure of Invention
The invention aims to provide a real flow split testing device and a real flow split testing method, which replace the testing after assembling a splitter meter on a flowmeter, realize the real flow testing of low pressure and large flow based on the split principle, and have convenient, reliable and accurate testing.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides an actual flow split testing apparatus, including:
the flowmeter comprises a pipe body, a pore plate and a sensor, wherein the pore plate is arranged at an inlet of the pipe body, and the sensor is arranged inside the pipe body;
divide the flowmeter, for the cylinder structure, the inside at the body is installed to the reposition of redundant personnel meter, and the central line collineation setting of the central line of reposition of redundant personnel meter and body, the sensor inserts the inside of dividing the flowmeter.
In optional embodiment, the body includes first shrink section, first measurement section and the first divergent section that communicates in proper order, and wherein, the diameter of first shrink section is the shrink trend, and the diameter of first measurement section remains unchanged, and the diameter of first divergent section is the divergent trend, and the sensor is installed in the inside of first measurement section.
In an optional embodiment, the shunt meter comprises a second contraction section, a second measurement section and a second diffusion section which are sequentially communicated, wherein the diameter of the second contraction section is in a contraction trend, the diameter of the second measurement section is kept unchanged, the diameter of the second diffusion section is in a diffusion trend, and the sensor is installed inside the second measurement section.
In an alternative embodiment, the second constriction, the second measurement section and the second diffusion section are located inside the first constriction, the first measurement section and the first diffusion section, respectively.
In an alternative embodiment, the contraction angle of the second contraction section is equal to the contraction angle of the first contraction section, and the divergence angle of the second diffusion section is equal to the divergence angle of the first diffusion section.
In an alternative embodiment, the outer diameter of the second necked section and the outer diameter of the second measured section are both less than or equal to the inner diameter of the first measured section, and the outer surface of the second flared section mates with the inner surface of the first flared section.
In an alternative embodiment, the shunt has a length less than the length of the tube, and a buffer rectification chamber is formed inside the tube at the entrance of the orifice plate to the shunt.
In an optional embodiment, a notch is formed in the side wall of the shunt meter, the notch extends from the inlet of the shunt meter to the middle of the shunt meter, and the sensor slides into the interior of the shunt meter along the notch.
In an alternative embodiment, the inlet of the partial flow meter is flared.
In a second aspect, the present invention provides an actual flow splitting test method, where the actual flow splitting test method employs the actual flow splitting test apparatus in the foregoing embodiment, and the actual flow splitting test method includes:
calibrating and checking the flowmeter in an air gas flow calibration device to obtain a first flow data curve;
installing a shunt meter on the flowmeter to form an actual current shunt testing device;
calibrating and checking the actual flow split test device in the air flow calibration device to obtain a second flow data curve;
comparing the first flow data curve with the second flow data curve to obtain a split ratio;
verifying the real flow split testing device in a real flow standard device to obtain real gas error data;
and deducing the gas error data of the flowmeter according to the flow split ratio and the gas error data.
The real flow split testing device and method provided by the embodiment of the invention have the beneficial effects that:
1. the shunt meter is assembled on the flowmeter to replace the test, and meanwhile, the low-pressure large-flow real-flow test is realized on the basis of the shunt principle, and the test is convenient, reliable and accurate;
2. the central line collineation of the central line of branch flowmeter and body sets up, can constitute different split ratios, realizes the real current test of different model flowmeters, and based on this structure, to the sensor, the fluid state that flowmeter and real current split testing arrangement produced is the same.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an actual flow splitting test apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic full-sectional structure diagram of an actual flow splitting test apparatus according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a shunt;
FIG. 4 is a schematic view of a full-section of a flow divider;
fig. 5 is a flowchart of an actual flow splitting test method according to a second embodiment of the present invention.
Icon: 100-real flow split test device; 110-a flow meter; 111-a tube body; 1111-first shrink section; 1112-a first measurement segment; 1113-first diffuser section; 112-well plate; 113-a sensor; 120-shunt meter; 121-a second constriction; 122-a second measurement segment; 123-a second diffuser section; 124-notch.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1 and fig. 2, the present embodiment provides an actual flow split testing apparatus 100, and the actual flow split testing apparatus 100 includes a flow meter 110 and a flow divider 120.
Specifically, the flowmeter 110 includes a pipe body 111, an orifice 112, and a sensor 113, the orifice 112 being installed at an inlet of the pipe body 111, and the sensor 113 being installed inside the pipe body 111.
The pipe body 111 comprises a first contraction section 1111, a first measurement section 1112 and a first diffusion section 1113 which are sequentially communicated, wherein the diameter of the first contraction section 1111 tends to contract, the diameter of the first measurement section 1112 remains unchanged, the diameter of the first diffusion section 1113 tends to diffuse, and the sensor 113 is installed inside the first measurement section 1112.
Referring to fig. 2 to 4, the shunt meter 120 includes a second contraction section 121, a second measurement section 122 and a second diffusion section 123 which are sequentially connected, wherein a diameter of the second contraction section 121 is in a contraction trend, a diameter of the second measurement section 122 is kept constant, a diameter of the second diffusion section 123 is in a diffusion trend, and the sensor 113 is installed inside the second measurement section 122.
Referring to fig. 2, the second contraction section 121, the second measurement section 122 and the second diffusion section 123 are respectively located inside the first contraction section 1111, the first measurement section 1112 and the first diffusion section 1113. The contraction angle of the second contraction section 121 is equal to that of the first contraction section 1111, the inner diameter of the second measurement section 122 is in proportional relation to that of the first measurement section 1112, and the diffusion angle of the second diffusion section 123 is equal to that of the first diffusion section 1113.
The outer diameter of the second converging section 121 and the outer diameter of the second measuring section 122 are both less than or equal to the inner diameter of the first measuring section 1112, and the outer surface of the second diverging section 123 mates with the inner surface of the first diverging section 1113. Specifically, the outer diameter of the second constriction section 121 may be equal to the inner diameter of the first measurement section 1112, and the maximum outer diameter of the second constriction section 121 may be smaller than the inner diameter of the first measurement section 1112. In this way, the flow divider 120 can be inserted into the flow meter 110 from the outlet of the flow meter 110 until the outer surface of the second diffuser section 123 of the flow divider 120 mates with the inner surface of the first diffuser section 1113, and at the same time the flow divider 120 can be fixed in the flow divider 120 by means of sealing glue, support rings, or the like.
Because the orifice plate 112 and the sensor 113 are not easily detached from the flowmeter 110, in the present embodiment, a notch 124 is formed in the side wall of the flow divider 120, the notch 124 extends from the inlet of the flow divider 120 to the middle of the flow divider 120, and the sensor 113 slides into the interior of the flow divider 120 along the notch 124. That is, during insertion of flow meter 120 into flow meter 110 from the outlet of flow meter 110, sensor 113 is fixed to first measurement section 1112 of flow meter 110, and sensor 113 enters notch 124 of flow meter 120 and slides relative to notch 124 until sensor 113 is located in second measurement section 122 of flow meter 120. In this way, the flow meter 120 can be mounted on the flow meter 110 without detaching the orifice plate 112 and the sensor 113 on the flow meter 110, and the mounting convenience and the measurement reliability are greatly improved.
Of course, in other embodiments, flow meter 120 may be configured to load flow meter 110 from the inlet of flow meter 110, except that orifice plate 112 of flow meter 110 may need to be removed.
The length of the shunt meter 120 is smaller than that of the pipe body 111, and a buffer rectification cavity is formed in the pipe body 111 at the inlet from the orifice plate 112 to the shunt meter 120, so that the consistency of a flow field can be ensured by gas flowing through the buffer rectification cavity. The inlet of the flow divider 120 is flared to receive the gas entering the inlet of the flow meter 110 and adjust the flow state of the gas, and then the second constriction 121 accelerates the gas to make the gas flow through the second measurement section 122 in a laminar state.
It will be readily appreciated that the inner diameter of the tubular body 111 of the flow meter 110 can have a variety of design dimensions, and the inner diameter of the shunt meter 120 can also be designed as desired.
The beneficial effects of the real-flow split testing apparatus 100 provided by the embodiment include:
1. the shunt meter 120 is assembled on the flowmeter 110 to replace the test, and meanwhile, the real-flow test on low pressure and large flow is realized on the basis of the shunt principle, and the test is convenient, reliable and accurate;
2. the central line of the shunt meter 120 and the central line of the pipe body 111 are arranged in a collinear way, so that different shunt ratios can be formed, and the real flow test of the flowmeters 110 of different models can be realized, and based on the structure, the fluid states generated by the flowmeters 110 and the real flow shunt test device 100 are the same for the sensor 113;
3. the shunt meter 120 can be installed into the flow meter 110 from the outlet of the flow meter 110 without disassembling the orifice plate 112 and the sensor 113 of the flow meter 110, and the installation is convenient without affecting the stability and reliability of the test of the sensor 113.
Second embodiment
Referring to fig. 5, the present embodiment provides an actual flow splitting test method, which adopts the actual flow splitting test apparatus 100 provided in the first embodiment, and the actual flow splitting test method includes the following steps:
s1: the flow meter 110 is calibrated and verified in an air and gas flow calibration apparatus to obtain a first flow data curve.
The flow data curve can be derived from the flow signals obtained during calibration and verification, which are indicative of the flow provided by the sensor 113, and which are proportional to the flow of gas. The first flow data curve may reflect the metering performance of the flow meter 110.
S2: a shunt meter 120 is mounted to the flow meter 110 to form the live test device 100.
S3: the live split test apparatus 100 was calibrated and verified in the transport air gas flow calibration apparatus to obtain a second flow data curve.
The second traffic data curve herein may reflect the metering performance of the live streaming test device 100.
S4: and comparing the first flow data curve with the second flow data curve to obtain the split ratio.
S5: the real flow split test device 100 is verified in a real flow standard device to obtain real gas error data.
The real-air error data of the real-flow split-testing apparatus 100 herein may reflect the real-flow testing metering performance of the real-flow split-testing apparatus 100.
S6: the real gas error data of the flow meter 110 is derived from the split ratio and the real gas error data.
The real gas error data of the flow meter 110 here may reflect the real flow test metering performance of the flow meter 110.
The real flow split test method provided by the embodiment has the beneficial effects that:
the actual flow split testing device 100 adopted in this embodiment assembles the partial flow meter 120 to the flow meter 110, performs actual flow split testing, and performs the actual flow split testing method to realize actual flow testing of low pressure and large flow based on the split principle, and the testing is convenient, reliable and accurate.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
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| CN202110863072.9A CN113588029A (en) | 2021-07-29 | 2021-07-29 | Real flow split testing device and method |
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| US4051711A (en) * | 1975-11-12 | 1977-10-04 | Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Calibration apparatus for gas flowmeters |
| JP2002005710A (en) * | 2000-06-20 | 2002-01-09 | Ngk Spark Plug Co Ltd | Bypass type measuring device for flow and flow velocity in pipe of small diameter |
| EP1179726A2 (en) * | 2000-08-11 | 2002-02-13 | NGK Spark Plug Company Limited | Split-flow-type flowmeter |
| WO2012014632A1 (en) * | 2010-07-26 | 2012-02-02 | オムロン株式会社 | Flow measurement structure and flow measurement device |
| CN204154344U (en) * | 2014-11-13 | 2015-02-11 | 武汉金惠科技有限公司 | A kind of flowmeter for measuring gas liquid ratio |
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| WO2018114402A1 (en) * | 2016-12-23 | 2018-06-28 | Endress+Hauser Flowtec Ag | Mass flow meter according to the coriolis principle and method for determining a mass flow |
| CN210221166U (en) * | 2019-09-19 | 2020-03-31 | 卓度计量技术（深圳）有限公司 | Gas flowmeter |
| CN112179432A (en) * | 2019-07-02 | 2021-01-05 | 株式会社堀场Stec | Flow sensor, correction device and correction method for flow sensor, flow control device, and storage medium |
| CN215217713U (en) * | 2021-07-29 | 2021-12-17 | 卓度计量技术（深圳）有限公司 | Real-current flow splitting testing device |
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2021
- 2021-07-29 CN CN202110863072.9A patent/CN113588029A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4051711A (en) * | 1975-11-12 | 1977-10-04 | Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Calibration apparatus for gas flowmeters |
| JP2002005710A (en) * | 2000-06-20 | 2002-01-09 | Ngk Spark Plug Co Ltd | Bypass type measuring device for flow and flow velocity in pipe of small diameter |
| EP1179726A2 (en) * | 2000-08-11 | 2002-02-13 | NGK Spark Plug Company Limited | Split-flow-type flowmeter |
| WO2012014632A1 (en) * | 2010-07-26 | 2012-02-02 | オムロン株式会社 | Flow measurement structure and flow measurement device |
| CN204154344U (en) * | 2014-11-13 | 2015-02-11 | 武汉金惠科技有限公司 | A kind of flowmeter for measuring gas liquid ratio |
| CN105181040A (en) * | 2015-09-25 | 2015-12-23 | 辽宁聚焦科技有限公司 | Method for digitized calibration and optimization of difference pressure flow meter |
| WO2018114402A1 (en) * | 2016-12-23 | 2018-06-28 | Endress+Hauser Flowtec Ag | Mass flow meter according to the coriolis principle and method for determining a mass flow |
| CN112179432A (en) * | 2019-07-02 | 2021-01-05 | 株式会社堀场Stec | Flow sensor, correction device and correction method for flow sensor, flow control device, and storage medium |
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| CN215217713U (en) * | 2021-07-29 | 2021-12-17 | 卓度计量技术（深圳）有限公司 | Real-current flow splitting testing device |
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