CN115585871A - Combined type standard meter method flow standard device and using method - Google Patents

Combined type standard meter method flow standard device and using method Download PDF

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Publication number
CN115585871A
CN115585871A CN202211173821.6A CN202211173821A CN115585871A CN 115585871 A CN115585871 A CN 115585871A CN 202211173821 A CN202211173821 A CN 202211173821A CN 115585871 A CN115585871 A CN 115585871A
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China
Prior art keywords
pipeline
flow
interface
flowmeter
meter
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Inventor
刘敦利
贾广成
赵志方
邸翔
穆军
许德福
王杰
陈文琳
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XINJIANG UYGUR AUTONOMOUS REGION INSTITUTE OF MEASUREMENT AND TESTING
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XINJIANG UYGUR AUTONOMOUS REGION INSTITUTE OF MEASUREMENT AND TESTING
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Priority to CN202211173821.6A priority Critical patent/CN115585871A/en
Publication of CN115585871A publication Critical patent/CN115585871A/en
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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

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention discloses a combined standard meter method flow standard device and a using method thereof, relates to the technical field of flow metering equipment, and mainly aims to provide the combined standard meter method flow standard device capable of improving the measurement precision and the upper limit of a flow range. The main technical scheme of the invention is as follows: a combined meter-based flow calibration device, comprising: the first flow meter is arranged in the middle of the first pipeline and connected to the first platform, the first valve body is arranged between the first flow meter and the second interface, the second flow meter is arranged in the middle of the second pipeline and connected to the second platform, and the second valve body is arranged between the second flow meter and the fourth interface; the two ends of the first connecting pipe are detachably connected to the side faces of one ends of the first pipeline and the second pipeline respectively, and the two ends of the second connecting pipe are detachably connected to the side faces of the other ends of the first pipeline and the second pipeline respectively. The invention is mainly used for flow measurement and calibration.

Description

Combined type standard meter method flow standard device and using method
Technical Field
The invention relates to the technical field of flow metering equipment, in particular to a combined standard meter method flow standard device and a using method thereof.
Background
Compared with the traditional laboratory calibration, the online calibration can more objectively reflect the metering performance of the flowmeter in the actual application state. Therefore, in recent years, on-line calibration of flow meters is becoming the main direction and trend of flow meter development, and more customers select on-line calibration instead of check-in to laboratory calibration. The on-line calibration technology and method are concerned and discussed by various metering technical mechanisms and experts.
At present, the conventional online calibration method is to install an external clamp type ultrasonic flowmeter outside a pipeline for flow measurement. The method is influenced by a plurality of factors such as pipeline materials, wall thickness, media, straight pipe length, installation accuracy and the like, the measurement accuracy of the method is low and generally lower than 2%, the calibration requirement of the process control type flow meter can only be met, and the upper limit of the flow range of a single device is limited because devices with different measurement ranges need to be prepared for online calibration.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a combined standard meter method flow standard device and a use method thereof, and mainly aims to provide a combined standard meter method flow standard device capable of improving measurement accuracy and an upper limit of a flow range.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in one aspect, an embodiment of the present invention provides a combined standard meter method flow standard device, where the device includes:
the measuring assembly at least comprises a first assembly and a second assembly, the first assembly comprises a first platform, a first flowmeter, a first pipeline and a first valve body, a first interface and a second interface are arranged at two ends of the first pipeline, the first flowmeter is arranged in the middle of the first pipeline, the first flowmeter is connected to the first platform, the first valve body is arranged between the first flowmeter and the second interface, the second assembly comprises a second platform, a second flowmeter, a second pipeline and a second valve body, a third interface and a fourth interface are arranged at two ends of the second pipeline, the second flowmeter is arranged in the middle of the second pipeline, the second flowmeter is connected to the second platform, and the second valve body is arranged between the second flowmeter and the fourth interface;
coupling assembling, coupling assembling includes first connecting pipe and second connecting pipe, the both ends of first connecting pipe can dismantle respectively connect in the one end side of first pipeline and second pipeline, the both ends of second connecting pipe can dismantle respectively connect in first pipeline with the other end side of second pipeline.
Further, one end of the first connection pipe is connected to the first pipeline, and one end of the first connection pipe is located between the first port and the first flowmeter, and the other end of the first connection pipe is connected to the second pipeline, and the other end of the first connection pipe is located between the third port and the second flowmeter.
Further, one end of the second connecting pipe is connected to the first pipeline, and is located between the second port and the first valve body, and the other end of the second connecting pipe is connected to the second pipeline, and is located between the fourth port and the second valve body.
Furthermore, the first pipeline comprises a first branch pipeline and a second branch pipeline, and two ends of the first flowmeter are detachably connected to the first branch pipeline and the second branch pipeline respectively.
Further, the second pipeline comprises a third branch pipeline and a fourth branch pipeline, and two ends of the second flowmeter are detachably connected to the third branch pipeline and the fourth branch pipeline respectively.
Further, the diameter of the first pipeline is larger than that of the second pipeline.
Further, coupling assembling still includes first valve and second valve, first valve sets up on the first connecting pipe, the second valve sets up on the second connecting pipe.
Furthermore, the blocking heads are respectively connected to the first interface, the second interface, the third interface and the fourth interface.
On the other hand, the embodiment of the invention also provides a use method of the combined standard meter method flow standard device, which comprises the following steps:
step 1: selecting and connecting the first interface or the third interface according to the caliber of the detected equipment;
step 2: the first interface or the third interface is connected in series on a standard device, and the standard device is used for calibrating the device according to the common flow points of the detected equipment, so that the indication error of each common flow point is less than or equal to 0.05 percent, the expansion uncertainty U =0.05 percent, and k =2;
and 3, step 3: connecting the first interface or the third interface in series to a pipeline of the detected equipment to operate the detected equipment;
and 4, step 4: the instantaneous flow of the first assembly or the second assembly is adjusted by changing the opening degree of the first valve body or the second valve body;
and 5: the control system is used for simultaneously acquiring the instantaneous flow or the accumulated flow of the detected equipment, the first flow meter and the second flow meter:
step 6: and calculating the indication error and repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected equipment.
Further, in step 5, the control system acquires the flow rate at least 3 times, wherein the acquisition time is 30 to 60 seconds.
Compared with the prior art, the invention has the following technical effects:
in the technical scheme provided by the embodiment of the invention, the measuring assembly is used for measuring and calibrating the flow of the detected equipment, and at least comprises a first assembly and a second assembly, wherein the first assembly comprises a first platform, a first flowmeter, a first pipeline and a first valve body, a first interface and a second interface are arranged at two ends of the first pipeline, the first flowmeter is arranged in the middle of the first pipeline, the first flowmeter is connected to the first platform, the first valve body is arranged between the first flowmeter and the second interface, the second assembly comprises a second platform, a second flowmeter, a second pipeline and a second valve body, a third interface and a fourth interface are arranged at two ends of the second pipeline, the second flowmeter is arranged in the middle of the second pipeline, the second flowmeter is connected to the second platform, and the second valve body is arranged between the second flowmeter and the fourth interface; the effect of coupling assembling is to communicate first subassembly and second subassembly, and coupling assembling includes first connecting pipe and second connecting pipe, and the both ends of first connecting pipe can be dismantled respectively and connect in the one end side of first pipeline and second pipeline, and the both ends of second connecting pipe can be dismantled respectively and connect in the other end side of first pipeline and second pipeline, and for prior art, adopt outer clamp formula ultrasonic flowmeter to install and carry out flow measurement in the pipeline outside. The method is influenced by a plurality of factors such as the material of a pipeline, the wall thickness, a medium, the length of a straight pipe section, the installation precision and the like, the measurement precision of the method is lower and is generally lower than 2%, the calibration requirement of a process control type flow meter can only be met, equipment with different measurement ranges is required to be prepared for online calibration, and the upper limit of the flow range of single equipment is limited.
Drawings
Fig. 1 is a schematic structural diagram of a combined standard meter method flow standard device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a first assembly according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second assembly according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for using a combined standard meter method flow standard device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In one aspect, as shown in fig. 1 to 3, an embodiment of the present invention provides a combined standard meter method flow standard device, where the device includes:
the measuring assembly at least comprises a first assembly and a second assembly, wherein the first assembly comprises a first platform 11, a first flowmeter 12, a first pipeline 13 and a first valve body 14, a first interface 15 and a second interface 16 are arranged at two ends of the first pipeline 13, the first flowmeter 12 is arranged in the middle of the first pipeline 13, the first flowmeter 12 is connected to the first platform 11, the first valve body 14 is arranged between the first flowmeter 12 and the second interface 16, the second assembly comprises a second platform 21, a second flowmeter 22, a second pipeline 23 and a second valve body 24, a third interface 25 and a fourth interface 26 are arranged at two ends of the second pipeline 23, the second flowmeter 22 is arranged in the middle of the second pipeline 23, the second flowmeter 22 is connected to the second platform 21, and the second valve body 24 is arranged between the second flowmeter 22 and the fourth interface 26;
the connecting assembly comprises a first connecting pipe 31 and a second connecting pipe 32, two ends of the first connecting pipe 31 are detachably connected to one end side faces of the first pipeline 13 and the second pipeline 23 respectively, and two ends of the second connecting pipe 32 are detachably connected to the other end side faces of the first pipeline 13 and the second pipeline 23 respectively.
In the technical solution provided in the embodiment of the present invention, the measuring component is used for measuring and calibrating the flow rate of the device to be tested, and the measuring component at least includes a first component and a second component, the first component includes a first platform 11, a first flowmeter 12, a first pipeline 13 and a first valve 14, a first interface 15 and a second interface 16 are disposed at two ends of the first pipeline 13, the first flowmeter 12 is disposed in the middle of the first pipeline 13, the first flowmeter 12 is connected to the first platform 11, the first valve 14 is disposed between the first flowmeter 12 and the second interface 16, the second component includes a second platform 21, a second flowmeter 22, a second pipeline 23 and a second valve 24, a third interface 25 and a fourth interface 26 are disposed at two ends of the second pipeline 23, the second flowmeter 22 is disposed in the middle of the second pipeline 23, the second flowmeter 22 is connected to the second platform 21, and the second valve 24 is disposed between the second flowmeter 22 and the fourth interface 26; the connecting assembly is used for communicating the first assembly with the second assembly, the connecting assembly comprises a first connecting pipe 31 and a second connecting pipe 32, two ends of the first connecting pipe 31 are detachably connected to one end side faces of the first pipeline 13 and the second pipeline 23 respectively, two ends of the second connecting pipe 32 are detachably connected to the other end side faces of the first pipeline 13 and the second pipeline 23 respectively, and compared with the prior art, the outer-clamping type ultrasonic flowmeter is installed on the outer side of a pipeline for flow measurement. The method is influenced by a plurality of factors such as pipeline materials, wall thicknesses, media, straight pipe lengths, installation accuracy and the like, the measurement accuracy of the method is low and generally lower than 2%, the calibration requirements of process control type flow meters can only be met, and in addition, equipment with different measurement ranges needs to be prepared for online calibration, the upper limit of the flow range of single equipment is limited.
The measuring assembly is used for measuring and calibrating the flow of the detected equipment, the measuring assembly at least comprises a first assembly and a second assembly, the first assembly comprises a first platform 11, a first flowmeter 12, a first pipeline 13 and a first valve body 14, a first interface 15 and a second interface 16 are arranged at two ends of the first pipeline 13, the first flowmeter 12 is arranged in the middle of the first pipeline 13, the first flowmeter 12 is connected to the first platform 11, the first valve body 14 is arranged between the first flowmeter 12 and the second interface 16, the first pipeline 13 comprises a first branch pipeline 131 and a second branch pipeline 132, two ends of the first flowmeter 12 are respectively detachably connected to the first branch pipeline 131 and the second branch pipeline 132, a connecting flange is arranged at one end of the first branch pipeline 131 and one end of the second branch pipeline 132 close to the first flowmeter 12, and the first branch pipeline 12 is convenient to mount and dismount, the first valve body 14 adopts a ball valve, the first flowmeter 12 adopts an existing Coriolis mass flowmeter, the caliber of the first flowmeter 12 is DN50mm, the first flowmeter 12 can be used independently, the first platform 11 supports the first flowmeter 12, the first flowmeter 12 is detachably connected to the first pipeline 13, the first flowmeter 12 is convenient to detach and install, the first valve body 14 is arranged between the first flowmeter 12 and the second interface 16, the first interface 15 and the second interface 16 are used for being connected with a standard device or detected equipment of a laboratory, when the first assembly is used independently, the first connecting pipe 31 and the second connecting pipe 32 are detached firstly, then the first valve body 14 is closed, two ends of the first pipeline 13 are installed on the standard device of the laboratory, according to the common flow points of the on-site detected flowmeter, at each common flow point, the first valve body 12 is connected with the second pipeline 13, and the first valve body 12 is connected with the first valve body 14, and the second valve body is connected with the second pipeline 13Under the common flow points, calibrating the first component by using a standard device to ensure that the indication error of each common flow point is less than or equal to 0.05 percent, the expansion uncertainty U =0.05 percent and the k =2 percent, then moving the first component to the site of the detected flow meter, connecting the first component in series to the pipeline of the detected equipment through a first interface 15 and a second interface 16, wherein the caliber range DN25 mm-DN 50mm of the detected equipment and the flow range (1-50) m 3 The pipe diameters of DN25 mm-DN 40mm can be connected by changing the pipe diameters into DN50mm, a pipeline of the detected equipment is operated, the instantaneous flow of the first pipeline 13 is adjusted by changing the opening degree of the first valve body 14, the detected equipment is enabled to operate for at least 5min under each common flow point, the instantaneous flow or the accumulated flow of the first flowmeter 12 on the detected equipment and the first assembly is simultaneously collected through the control system, the operation is simultaneously stopped after at least 30s of collection, each common flow point is repeated at least 3 times, the indication error and the repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected flowmeter are calculated, the pipeline of the detected flowmeter is stopped, the instantaneous flow is changed into 0, the first assembly is detached from the pipeline of the detected flowmeter, the online calibration of the detected flowmeter is completed, the second assembly comprises a second platform 21, a second pipeline 23 and a second valve body 24, a third interface 25 and a fourth interface 26 are arranged at two ends of the second pipeline 23, the second flowmeter 22 is arranged in the middle of the second pipeline 23, the second flowmeter 22 is connected to the second platform 21, and the second valve body 24 is arranged between the fourth interface 26; the connecting assembly is used for communicating a first assembly and a second assembly, the connecting assembly comprises a first connecting pipe 31 and a second connecting pipe 32, two ends of the first connecting pipe 31 are detachably connected to one end side surfaces of a first pipeline 13 and a second pipeline 23 respectively, two ends of the second connecting pipe 32 are detachably connected to the other end side surfaces of the first pipeline 13 and the second pipeline 23 respectively, the second assembly is the same as the first assembly in structure, the difference is that the calibers of the first pipeline 13 and the second pipeline 23 are different, the measuring ranges of the first flowmeter 12 and the second flowmeter 22 are different, the second pipeline comprises a third branch pipeline 231 and a fourth branch pipeline 232, two ends of the second flowmeter 22 are detachably connected to the third branch pipeline 231 and the fourth branch pipeline 232 respectively, and the third branch pipeline 231 and the fourth branch pipeline 232 are connected to the third branch pipeline 231 and the fourth branch pipeline 232 respectivelyOne end of the branch pipe 232 close to the second flowmeter 22 is provided with a connecting flange, so that the second flowmeter 22 can be conveniently installed and detached, the diameter of the first pipeline 13 is smaller than that of the second pipeline 23, when the second assembly is used independently, the first connecting pipe 31 and the second connecting pipe 32 are detached, then the second valve body 24 is closed, two ends of the second pipeline 23 are installed on a standard device of a laboratory, according to the common flow points of the flowmeter to be detected on site, the second assembly is calibrated by using the standard device under each common flow point, so that the indication error of each common flow point is less than or equal to 0.05%, the expansion uncertainty U =0.05%, and k =2, then the second assembly is moved to the site of the flowmeter to be detected, and is connected in series to the pipeline of the equipment to be detected through the third interface 25 and the fourth interface 26, the caliber range of the pipeline of the equipment to be detected is 65 mm-DN 100mm, and the flow range (50-100) m 3 The pipe diameters of DN65mm and DN80mm can be connected by changing the pipe diameters into DN100mm, the pipeline of the detected equipment is operated, the instantaneous flow of the second pipeline 23 is adjusted by changing the opening degree of the second valve body 24, the detected equipment is operated for at least 5min under each common flow point, the instantaneous flow or the accumulated flow of the detected equipment and the second flowmeter 22 on the second assembly are simultaneously collected by the control system and are simultaneously stopped after at least 30s of collection, each common flow point is repeated at least 3 times, the indicating error and the repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected flowmeter are calculated, the pipeline of the detected flowmeter is stopped to be operated, the instantaneous flow is changed into 0, the second assembly is detached from the pipeline of the detected flowmeter, the online calibration of the detected flowmeter is completed, in the technical scheme, the first flowmeter 12 and the second flowmeter 22 are used for calibrating the common flow points of the detected equipment in a laboratory, so that the indication error of each common flow point is less than or equal to 0.05%, the expansion uncertainty U =0.05%, and k =2, then the calibrated first flowmeter 12 and second flowmeter 22 are installed on the first pipeline 13 and the second pipeline 23, so that the measurement precision and accuracy are improved, in addition, a first connecting pipe 31 and a second connecting pipe 32 are arranged between the first pipeline 13 and the second pipeline 23, so that the first pipeline 13 and the second pipeline 23 are connected in parallel, and when the data acquisition is carried out on the detected equipment, the data acquisition can be carried out according to the data acquisition methodThe common flow point uses the first component or the second component, or uses the first component and the second component in combination, so that the upper limit of the flow range is improved, and the technical effect of improving the upper limit of the flow range is achieved.
Further, one end of the first connection pipe 31 is connected to the first pipe 13, and one end of the first connection pipe 31 is located between the first port 15 and the first flowmeter 12, and the other end of the first connection pipe 31 is connected to the second pipe 23, and the other end of the first connection pipe 31 is located between the third port 25 and the second flowmeter 22. In the present embodiment, a connection assembly is further defined, a first connection pipe 31 and a second connection pipe 32 are respectively disposed between the first pipeline 13 and the second pipeline 23, one end of the first connection pipe 31 is located between the first interface 15 and the first flowmeter 12, so that a flow rate can enter the first connection pipe 31 and the first pipeline 13 from the first interface 15, the other end of the first connection pipe 31 is located between the third interface 25 and the second flowmeter 22, so that a flow rate can enter the first connection pipe 31 and the first pipeline 13 from the third interface 25, when the first assembly and the second assembly are needed to be used simultaneously, the first connection pipe 31 and the second connection pipe 32 are opened, so that an upper limit of the flow rate range is raised, thereby achieving a technical effect of raising the upper limit of the flow rate range, one end of the second connection pipe 32 is connected to the first pipeline 13, and one end of the second connection pipe 32 is located between the second interface 16 and the first valve body 14, the other end of the second connection pipe 32 is connected to the second pipeline 23, and the other end of the second connection pipe 32 is located between the fourth interface 26 and the second valve body 24, so that the first connection pipe 31 and the first connection pipe 32 act as to achieve the same effect of raising the flow rate, thereby forming a flow rate channel, and the upper limit of the first connection pipe 31, thereby achieving a communication effect of the first connection pipe 31 and the flow rate and the first connection pipe 32, thereby achieving a communication effect of the flow rate increase of the flow rate range.
Further, the connection assembly further includes a first valve 33 and a second valve 34, the first valve 33 is disposed on the first connection pipe 31, and the second valve 34 is disposed on the second connection pipe 32. In this embodiment, a connection assembly is further defined, a first valve 33 is disposed in the middle or at two ends of the first connection pipe 31, when the first valve 33 is disposed in the middle of the first connection pipe 31, the first pipe and the second pipe are not communicated with each other only by closing the first valve 33, when the first valve 33 is disposed at two ends of the first connection pipe 31, the first connection pipe 31 can be detached from the apparatus, so that the first assembly and the second assembly are completely separated, thereby achieving an effect of conveniently separating the first assembly and the second assembly, the second valve 34 is disposed in the middle or at two ends of the second connection pipe 32, the effect of the second valve 34 is the same as that of the first valve 33, and the structure is also the same, so that descriptions are omitted.
Further, the blocking heads are respectively connected to the first port 15, the second port 16, the third port 25 and the fourth port 26. In this embodiment, a plugging head is added, the plugging head is made of a rubber material, and the plugging head is detachably connected to the first connector 15, the second connector 16, the third connector 25 or the fourth connector 26, so that a technical effect of plugging the first pipeline 13 or the second pipeline 23 is achieved.
On the other hand, as shown in fig. 4, an embodiment of the present invention further provides a method for using a combined standard meter method flow standard device, where the method includes the following steps:
step 1: selecting and connecting the first interface or the third interface according to the caliber of the detected equipment;
step 2: the first interface or the third interface is connected in series on a standard device, and the standard device is used for calibrating the device according to the common flow points of the detected equipment, so that the indication error of each common flow point is less than or equal to 0.05 percent, the expansion uncertainty U =0.05 percent, and k =2;
and step 3: connecting the first interface or the third interface in series to a pipeline of the detected equipment to operate the detected equipment;
and 4, step 4: the instantaneous flow of the first assembly or the second assembly is adjusted by changing the opening degree of the first valve body or the second valve body;
and 5: the control system is used for simultaneously acquiring the instantaneous flow or the accumulated flow of the detected equipment, the first flow meter and the second flow meter:
step 6: and calculating the indication error and repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected equipment.
Further, in step 5, the control system acquires the flow rate at least 3 times, wherein the acquisition time is 30 to 60 seconds.
101. Selecting and connecting the first interface or the third interface according to the caliber of the detected equipment;
when the first assembly and the second assembly are used for simultaneously measuring the flow, for example, the caliber is DN50mm, and the upper limit of the flow is 80m 3 The detected equipment is connected with the first interface and the second interface, the third interface and the fourth interface are blocked by a blocking head, or the caliber is DN80mm, the upper limit of the flow is 150m 3 The detected equipment is connected with the third interface and the fourth interface, and the first interface and the second interface are plugged by the plugging heads.
102. The first interface or the third interface is connected in series on a standard device, and the standard device is used for calibrating the device according to the common flow points of the detected equipment, so that the indication error of each common flow point is less than or equal to 0.05 percent, the expansion uncertainty U =0.05 percent, and k =2;
and serially connecting the first interface or the third interface on a standard device, and calibrating the device by using the standard device according to the common flow points of the detected equipment, so that the indication error of each common flow point is less than or equal to 0.05%, the expansion uncertainty U =0.05%, and k =2.
103. Connecting the first interface or the third interface in series to a pipeline of the detected equipment, and operating the detected equipment;
and connecting the first interface or the third interface in series into the pipeline of the detected equipment, connecting the second interface or the fourth interface with the pipeline of the detected equipment, so that the pipeline of the detected equipment is connected with the first component or the second component in series respectively, and then operating the detected equipment.
104. The instantaneous flow of the first assembly or the second assembly is adjusted by changing the opening degree of the first valve body or the second valve body;
the instantaneous flow of the first assembly or the second assembly is adjusted by changing the opening degree of the first valve body or the second valve body, so that the detected flowmeter runs for at least 5min at each common flow point, for example, the caliber is DN50mm, upper flow limit of 80m 3 The general flow point of the detected equipment is 10m 3 /h、30m 3 /h、50m 3 /h、60m 3 H and 80m 3 H, 10m at the point of flow rate collection 3 /h、30m 3 H and 50m 3 When the data is in the/h range, the second valve body is closed, the first flowmeter is used for data acquisition, and the acquisition flow point is 60m 3 H and 80m 3 When the data is in the/h range, the first valve body is closed, and data acquisition is carried out by using the second flowmeter; the caliber is DN80mm, the upper limit of the flow is 150m 3 Per h equipment to be tested, with a common flow point of 30m 3 /h、50m 3 /h、80m 3 /h、120m 3 H and 150m 3 H, 30m at the point of flow collection 3 H and 50m 3 For data,/h, the second valve body is closed, the first flowmeter is used for data acquisition, and the acquisition flow point is 80m 3 When the data is in the range of/h, the first valve body is closed, the second flowmeter is used for data acquisition, and the acquisition flow point is 120m 3 H and 150m 3 And during the data of/h, simultaneously opening the first valve body and the second valve body, and acquiring data by using the first flowmeter and the second flowmeter.
105. The instantaneous flow or the accumulated flow of the detected equipment, the first flow meter and the second flow meter is acquired simultaneously through the control system;
and simultaneously acquiring the instantaneous flow or the accumulated flow of the detected equipment, the first flow meter and the second flow meter by the control system, and stopping at the same time after acquiring at least 30 s. Each common flow point is repeated at least 3 times.
106. Calculating the indicating error and repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected equipment;
and calculating the indication error and repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected equipment.
107. And stopping running the pipeline of the detected equipment to change the instantaneous flow to 0, and disassembling the device from the pipeline of the detected equipment to finish the online calibration of the detected equipment.
The invention has the following beneficial effects:
firstly, the invention realizes the independent use and the combined use of two sets of standard meter method flow standard devices, so that the measurement capability of the device is improved, and the caliber DN is less than 50mm, and the upper limit of the flow exceeds 50m 3 The flow meter and the caliber DN are more than 50mm, the lower limit of the flow is less than 50m 3 H and the upper flow limit exceeds 100m 3 The flowmeter of/h can realize online calibration by adopting the combination of the first assembly and the second assembly, and can realize online calibration by adopting the first assembly or the second assembly separately for other flowmeters.
Secondly, the combined type standard meter method flow standard device is composed of two sets of standard devices which can be used independently, the first component and the second component are respectively provided with an ultra-high precision main standard device, the two sets of standard devices are in a movable trolley form, the structure is compact, the standard devices can be moved to the site of a detected flow meter to carry out online calibration on the detected flow meter, the two sets of standard devices are connected in parallel through a short connection flange, ball valves at two ends of the short connection are opened, a connection interface can be selected according to the caliber of the detected flow meter, the instantaneous flow is adjusted by changing the opening of the ball valves, and the optimization of online calibration is realized.
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 person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A combined standard meter method flow standard device is characterized by comprising:
the measuring assembly at least comprises a first assembly and a second assembly, the first assembly comprises a first platform, a first flowmeter, a first pipeline and a first valve body, a first interface and a second interface are arranged at two ends of the first pipeline, the first flowmeter is arranged in the middle of the first pipeline, the first flowmeter is connected to the first platform, the first valve body is arranged between the first flowmeter and the second interface, the second assembly comprises a second platform, a second flowmeter, a second pipeline and a second valve body, a third interface and a fourth interface are arranged at two ends of the second pipeline, the second flowmeter is arranged in the middle of the second pipeline, the second flowmeter is connected to the second platform, and the second valve body is arranged between the second flowmeter and the fourth interface;
coupling assembling, coupling assembling includes first connecting pipe and second connecting pipe, the both ends of first connecting pipe can dismantle respectively connect in the one end side of first pipeline and second pipeline, the both ends of second connecting pipe can dismantle respectively connect in first pipeline with the other end side of second pipeline.
2. The modular meter-based flow calibration device of claim 1,
one end of the first connection pipe is connected to the first pipeline, one end of the first connection pipe is located between the first port and the first flowmeter, the other end of the first connection pipe is connected to the second pipeline, and the other end of the first connection pipe is located between the third port and the second flowmeter.
3. The modular meter-based flow calibration device of claim 1,
one end of the second connecting pipe is connected to the first pipeline, one end of the second connecting pipe is located between the second connector and the first valve body, the other end of the second connecting pipe is connected to the second pipeline, and the other end of the second connecting pipe is located between the fourth connector and the second valve body.
4. The modular meter-based flow calibration device of claim 1,
the first pipeline comprises a first branch pipeline and a second branch pipeline, and two ends of the first flowmeter are detachably connected to the first branch pipeline and the second branch pipeline respectively.
5. The modular meter-based flow calibration device of claim 1,
the second pipeline comprises a third branch pipeline and a fourth branch pipeline, and two ends of the second flowmeter are detachably connected to the third branch pipeline and the fourth branch pipeline respectively.
6. A combined standard meter method flow standard device according to any one of claims 1 to 5,
the first pipe has a diameter greater than the second pipe.
7. A combined meter scale flow rate gauging device according to any one of the claims 1 to 5,
the connecting assembly further comprises a first valve and a second valve, the first valve is arranged on the first connecting pipe, and the second valve is arranged on the second connecting pipe.
8. The modular meter-law flow normalization device according to any one of claims 1 to 5, further comprising:
and the plugging heads are respectively connected to the first interface, the second interface, the third interface and the fourth interface.
9. The use method of the combined standard meter method flow standard device is characterized by comprising the following steps:
step 1: selecting and connecting the first interface or the third interface according to the caliber of the detected equipment;
step 2: the first interface or the third interface is connected in series on a standard device, and the standard device is used for calibrating the device according to the common flow points of the detected equipment, so that the indication error of each common flow point is less than or equal to 0.05 percent, the expansion uncertainty U =0.05 percent, and k =2;
and step 3: connecting the first interface or the third interface in series to a pipeline of the detected equipment to operate the detected equipment;
and 4, step 4: the instantaneous flow of the first assembly or the second assembly is adjusted by changing the opening degree of the first valve body or the second valve body;
and 5: the control system is used for simultaneously acquiring the instantaneous flow or the accumulated flow of the detected equipment, the first flow meter and the second flow meter:
step 6: and calculating the indication error and repeatability of the instantaneous flow or the accumulated flow of each common flow point of the detected equipment.
10. The method of using a modular meter-based flow calibration device of claim 9,
in the step 5, the acquisition time of the control system is 30 to 60 seconds, and each common flow point is repeatedly acquired at least 3 times.
CN202211173821.6A 2022-09-26 2022-09-26 Combined type standard meter method flow standard device and using method Pending CN115585871A (en)

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CN202211173821.6A CN115585871A (en) 2022-09-26 2022-09-26 Combined type standard meter method flow standard device and using method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211173821.6A CN115585871A (en) 2022-09-26 2022-09-26 Combined type standard meter method flow standard device and using method

Publications (1)

Publication Number Publication Date
CN115585871A true CN115585871A (en) 2023-01-10

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Application Number Title Priority Date Filing Date
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