CN109506743B - Flowmeter online calibration device and calibration method - Google Patents
Flowmeter online calibration device and calibration method Download PDFInfo
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- CN109506743B CN109506743B CN201811408236.3A CN201811408236A CN109506743B CN 109506743 B CN109506743 B CN 109506743B CN 201811408236 A CN201811408236 A CN 201811408236A CN 109506743 B CN109506743 B CN 109506743B
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- 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
Abstract
The invention relates to an online calibration device of a flowmeter, which comprises a standard flowmeter, a filter, a buffer pipeline and a flushing assembly, wherein the input end of the standard flowmeter is connected with the filter. The invention also relates to a calibration method, which comprises the following steps: mounting the standard component on a component to be calibrated; the liquid flows into the transfusion outlet pipe through the buffer pipeline, the filter and the standard flowmeter in sequence through the to-be-calibrated flowmeter, so as to realize calibration; and opening the air pump to discharge residual liquid from the standard flowmeter pipeline, washing the standard flowmeter pipeline through the water pump, and drying the standard flowmeter pipeline through the air pump again to realize the cleaning and drying process of the standard flowmeter pipeline. The invention can realize on-site calibration, avoid inaccurate or damaged flowmeters caused by transportation bump, and simultaneously can carry out back washing on the standard component, thereby preventing the metering accuracy from being influenced by the corrosion of the standard component by residual liquid.
Description
Technical Field
The invention relates to the technical field of flow measurement, in particular to an online calibration device and method for a flowmeter.
Background
Various production sites often involve fluid metering operations in order to ensure metering accuracy. The flow meter needs to be calibrated regularly to ensure that the error of the flow meter is within the accuracy range specified by the country or the enterprise. The traditional calibration mode is to disassemble the flowmeter on site and send the flowmeter to a metering unit for on-site calibration, and the flowmeter needs to be sent to, wait for calibration, and take back, and the flowmeter is prevented from being damaged due to vibration and bumping in the pulling process. Because the necessary procedures are more, a large amount of manpower and material resources are consumed.
The existing calibration mode has many defects, for example, residual liquid exists in the calibration device after calibration is completed, the discharge is inconvenient, the waste of the residual liquid is caused, or the residual liquid exists in the calibration device for a long time and corrodes the calibration device, so that the calibration on site can be realized for better facilitating the production requirement on the site, and the problem that the production site needs to be realized urgently is solved.
Disclosure of Invention
The invention provides an online calibration device and a calibration method for a flowmeter, aiming at solving the problems in the prior art, and aiming at realizing on-site calibration, avoiding the inaccuracy or damage of the flowmeter caused by transportation bump, and simultaneously carrying out back washing on a standard component and preventing the influence on the metering accuracy caused by the corrosion of the standard component by residual liquid.
In order to achieve the purpose, the invention adopts the technical scheme that:
an online calibration device for a flowmeter comprises a component to be calibrated and a standard component, wherein the component to be calibrated is connected with the standard component, the standard component comprises a standard flowmeter, a filter, a buffer pipeline and a flushing component, the input end of the standard flowmeter is connected with the filter, the output end of the standard flowmeter is connected with the component to be calibrated, the input end of the buffer pipeline is respectively connected with the component to be calibrated and the flushing component, and the output end of the buffer pipeline is connected with the filter; the flushing assembly comprises a gas transmission assembly and a water transmission assembly, a first-stage three-way pipe is installed on an output pipeline of the standard flowmeter, and a humidity detection assembly is arranged at the outlet end of the first-stage three-way pipe.
Preferably, the humidity detection subassembly includes fixed block, carriage release lever, spring, humidity transducer, the fixed block with one-level three-way pipe fixed connection, the carriage release lever runs through the fixed block and rather than threaded connection, the one end of carriage release lever sets up the chuck, the chuck with the cover has on the carriage release lever between the fixed block the spring, be equipped with humidity transducer on the other end lateral wall of carriage release lever, the carriage release lever is L type structure, the spring is in compression state all the time.
It is preferred in any one of the above schemes, the filter includes rose box, filter screen, the bottom of rose box is spherical structure, the bottom of rose box is equipped with the apopore, the filter screen sets up just can reciprocate in the rose box, the filter screen with rose box inner wall threaded connection, be fixed with the bull stick on the filter screen, the one end of bull stick runs through the rose box.
In any of the above schemes, preferably, the input pipeline and the output pipeline of the standard flowmeter are respectively provided with a first valve and a first pressure gauge, and the flowmeter to be calibrated and the standard flowmeter are both provided with flow sensors.
In any of the above schemes, preferably, the component to be calibrated comprises a flowmeter to be calibrated, an infusion inlet pipe and an infusion outlet pipe, the flowmeter to be calibrated is respectively connected with the infusion inlet pipe and the infusion outlet pipe, the infusion inlet pipe and the infusion outlet pipe are respectively provided with a second valve and a second pressure gauge, the infusion outlet pipe is provided with a second three-way pipe and a third three-way pipe, and the infusion outlet pipe between the second three-way pipe and the third three-way pipe is provided with a third valve.
In any of the above schemes, preferably, the second-stage three-way pipe is connected with the input end of the buffer pipeline, and the third-stage three-way pipe is connected with the output pipeline of the standard flowmeter; and the first-stage three-way pipe, the second-stage three-way pipe and the third-stage three-way pipe are respectively provided with a fourth valve.
In any of the above schemes, preferably, the gas transmission assembly includes a gas storage tank and a suction pump, an input end of the suction pump is connected to the gas storage tank, and an output end of the suction pump is connected to an input end of the buffer pipeline.
In any of the above schemes, preferably, the water delivery assembly includes a water storage tank and a water pump, an input end of the water pump is communicated with the water storage tank, and an output end of the water pump is connected with an input end of the buffer pipeline; and fifth valves are respectively arranged on the pipelines of the air pump and the water pump.
In any of the above schemes, preferably, the online calibration device for a flow meter further includes a console, and the console is connected to the humidity sensor and the flow sensor respectively.
The invention also provides a calibration method, which uses the flowmeter online calibration device, and comprises the following steps in sequence:
step one, mounting a standard component on a component to be calibrated, opening fourth valves on a second-stage three-way pipe and a third-stage three-way pipe, and closing the fourth valve on a first-stage three-way pipe to enable an infusion inlet pipe, a flowmeter to be calibrated, a buffer pipeline, a filter, a standard flowmeter and an infusion outlet pipe to form a calibration loop;
step two, closing a fifth valve and a third valve on an infusion outlet pipe, enabling liquid in the infusion inlet pipe to enter a filter box through a flowmeter to be calibrated and a buffer pipeline for filtering, conveying the liquid filtered by a filter screen into a standard flowmeter, then enabling the liquid to enter an infusion outlet pipe through a three-stage three-way pipe, respectively transmitting flow signals to a control console by flow sensors on the flowmeter to be calibrated and the standard flowmeter, and displaying and comparing through a display screen, so that the flowmeter to be calibrated is verified according to comparison data;
step three, after the calibration is finished, removing residual liquid in the pipeline of the standard flowmeter, closing a fourth valve on the second-stage three-way pipe, opening a fifth valve on the air pump, opening a water outlet hole in the filter box, discharging the filtered residual liquid, enabling the rotating rod to rotate to push the filter screen to move downwards until the filter screen is positioned below the input end of the filter box, then starting the air pump to convey clean air in the air storage tank to the buffer pipeline, entering the standard flowmeter through the filter box, and pushing the residual liquid into the infusion outlet pipe;
step four, flushing the residual liquid after the residual liquid is pushed, closing an air pump, opening a water pump and a first valve on a first-stage three-way pipe, conveying water in a water storage tank into a buffer pipeline, entering a standard flowmeter through a filter box, and discharging the water through the outlet end of the first-stage three-way pipe, wherein a humidity sensor is positioned above the first-stage three-way pipe;
step five, after the flushing is finished, the water pump is closed, the moving rod is rotated to enable the humidity sensor to be aligned to the outlet of the first-stage three-way pipe, then the operation of the step three is repeated, water in the standard flowmeter is pushed out and dried, the humidity sensor transmits a measured humidity signal to the console and displays the humidity signal through the display screen, and the drying degree is judged according to the humidity of the blown gas until the drying degree reaches a standard range;
and step six, after the washing and drying are finished, the standard component is detached from the component to be calibrated, and the calibration process is finished.
Compared with the prior art, the online calibration device and the online calibration method for the flowmeter have the following beneficial effects:
1. the standard component is connected with the component to be calibrated on site, so that the flowmeter to be calibrated on site and on-line calibration are realized, and the inaccuracy or damage of the flowmeter caused by transportation bump is avoided;
2. by arranging the gas transmission assembly and the water transmission assembly on the standard assembly, residual liquid in the standard flowmeter pipeline can be conveyed into the infusion outlet pipe, so that the residual liquid is prevented from being wasted and polluting the surrounding environment, the standard flowmeter pipeline can be washed and dried, the cleanliness of the standard flowmeter is ensured, and the influence on the accuracy of the standard flowmeter due to corrosion of the residual liquid is avoided;
3. the filter screen can move up and down in the filter box, when the filter screen plays a role of filtering, the filter screen is positioned above the input end of the filter, and when the filter screen is washed, the filter screen is positioned below the input end of the filter, so that not only is the filtering function realized, but also the automatic back washing function of the filter screen can be realized, and the filter screen is kept clean all the time;
4. the humidity detection assembly is arranged at the outlet end of the primary three-way pipe, so that the humidity of gas blown out of the standard flowmeter can be detected, the dryness inside the standard flowmeter is judged, the dryness inside a pipeline of the standard flowmeter is ensured, the influence on the accuracy of the standard flowmeter due to humidity is avoided, the accuracy is high, and the service life is long;
5. make humidity transducer can stretch into in the one-level tee bend pipe through rotating the carriage release lever, play the guard action to humidity transducer, avoid carrying the standard subassembly in-process and make humidity transducer damage because of the collision.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a preferred embodiment of an online calibration device for a flowmeter according to the invention;
FIG. 2 is an enlarged view of a portion of A-A in the embodiment of FIG. 1.
The figures are labeled as follows: 1. a flowmeter to be calibrated; 2. a standard flow meter; 3. a second valve; 4. a second pressure gauge; 5. a second three-way pipe; 6. a three-stage three-way pipe; 7. a first-stage three-way pipe; 8. a buffer pipeline; 9. a filter box; 10. a water storage tank; 11. a gas storage tank; 12. an output liquid pipe; 13. a travel bar; 14. a fixed block; 15. a spring; 16. a humidity sensor; 17. a chuck; 18. a fourth valve; 19. a first pressure gauge; 20. a filter screen; 21. a rotating rod; 22. a first valve.
Detailed Description
In order that the invention may be further understood, the invention will now be described in detail with reference to specific examples.
As shown in fig. 1-2, an embodiment of the online calibration device for a flowmeter according to the present invention includes a component to be calibrated, and a standard component, where the component to be calibrated is connected to the standard component, the standard component includes a standard flowmeter 2, a filter, a buffer pipeline 8, and a flushing component, an input end of the standard flowmeter 2 is connected to the filter, an output end of the standard flowmeter 2 is connected to the component to be calibrated, an input end of the buffer pipeline 8 is connected to the component to be calibrated and the flushing component, respectively, and an output end of the buffer pipeline 8 is connected to the filter; the flushing assembly comprises a gas transmission assembly and a water transmission assembly, a first-stage three-way pipe 7 is installed on an output pipeline of the standard flowmeter 2, and a humidity detection assembly is arranged at the outlet end of the first-stage three-way pipe 7.
Humidity detection subassembly includes fixed block 14, carriage release lever 13, spring 15, humidity transducer 16, fixed block 14 with the top fixed connection of one-level three-way pipe 7 exit end, the one end of carriage release lever 13 sets up the chuck, chuck 17 with the cover has on the carriage release lever between the fixed block 14 spring 15, be equipped with humidity transducer 16 on the other end lateral wall of carriage release lever 13, humidity transducer 16 is close to the setting of one-level three-way pipe 7, carriage release lever 13 is L type structure.
The filter includes rose box 9, filter screen 20, the bottom of rose box 9 is spherical structure, the bottom of rose box 9 is equipped with the apopore, install the rubber buffer on the apopore, filter screen 20 sets up in the rose box 9 and can reciprocate in rose box 9.
The filter screen 20 with the filter tank 9 inner wall threaded connection, be fixed with the bull stick 21 on the filter screen 20, the one end of bull stick 21 runs through the filter tank 9, the input pipeline of filter is located the below of filter output pipeline.
And a first valve 22 and a first pressure gauge 19 are respectively arranged on an input pipeline and an output pipeline of the standard flowmeter 2, and flow sensors are respectively arranged on the flowmeter to be calibrated and the standard flowmeter.
The device comprises a to-be-calibrated flow meter 1, an infusion inlet pipe and an infusion outlet pipe 12, wherein the two ends of the to-be-calibrated flow meter 1 are respectively connected with the infusion inlet pipe and the infusion outlet pipe 12, the infusion inlet pipe and the infusion outlet pipe 12 are respectively provided with a second valve 3 and a second pressure gauge 4, the infusion outlet pipe 12 is provided with a second-stage three-way pipe 5 and a third-stage three-way pipe 6, a third valve is arranged on the infusion outlet pipe 12 between the second-stage three-way pipe 5 and the third-stage three-way pipe 6, and the second valve 3 on the infusion outlet pipe 7 is positioned between the second-stage three-way pipe 5 and the to-.
The second-stage three-way pipe 5 is connected with the input end of the buffer pipeline 8, and the third-stage three-way pipe 6 is connected with the output pipeline of the standard flowmeter 2; and fourth valves 18 are respectively arranged on the first-stage three-way pipe 7, the second-stage three-way pipe 5 and the third-stage three-way pipe 6.
The gas transmission assembly comprises a gas storage tank 11 and a suction pump, the input end of the suction pump is connected with the gas storage tank 11, and the output end of the suction pump is connected with the input end of the buffer pipeline 8.
The water delivery subassembly includes water storage tank 10, water pump, the input of water pump with water storage tank 10 intercommunication, the output of water pump with the input of buffer pipeline 8 is connected.
And fifth valves are respectively arranged on the pipelines of the air pump and the water pump.
The on-line calibration device of the flowmeter further comprises a console, wherein the console is respectively connected with the humidity sensor and the flow sensor, and the console comprises a display screen and a PLC (programmable logic controller), and the humidity sensor, the flow sensor and the display screen are respectively connected with the PLC.
The invention also provides a calibration method, which comprises the following steps in sequence:
step one, mounting a standard component on a component to be calibrated, opening fourth valves on a second-stage three-way pipe and a third-stage three-way pipe, and closing the fourth valve on a first-stage three-way pipe to enable an infusion inlet pipe, a flowmeter to be calibrated, a buffer pipeline, a filter, a standard flowmeter and an infusion outlet pipe to form a calibration loop;
step two, closing a fifth valve and a third valve on an infusion outlet pipe, enabling liquid in the infusion inlet pipe to enter a filter box through a flowmeter to be calibrated and a buffer pipeline for filtering, conveying the liquid filtered by a filter screen into a standard flowmeter, then enabling the liquid to enter an infusion outlet pipe through a three-stage three-way pipe, respectively transmitting flow signals to a control console by flow sensors on the flowmeter to be calibrated and the standard flowmeter, and displaying and comparing through a display screen, so that the flowmeter to be calibrated is verified according to comparison data;
step three, after the calibration is finished, removing residual liquid in the pipeline of the standard flowmeter, closing a fourth valve on the second-stage three-way pipe, opening a fifth valve on the air pump, opening a water outlet hole in the filter box, discharging the filtered residual liquid, enabling the rotating rod to rotate to push the filter screen to move downwards until the filter screen is positioned below the input end of the filter box, then starting the air pump to convey clean air in the air storage tank to the buffer pipeline, entering the standard flowmeter through the filter box, and pushing the residual liquid into the infusion outlet pipe;
step four, flushing the residual liquid after the residual liquid is pushed, closing an air pump, opening a water pump and a first valve on a first-stage three-way pipe, conveying water in a water storage tank into a buffer pipeline, entering a standard flowmeter through a filter box, and discharging the water through the outlet end of the first-stage three-way pipe, wherein a humidity sensor is positioned above the first-stage three-way pipe;
step five, after the flushing is finished, the water pump is closed, the moving rod is rotated to enable the humidity sensor to be aligned to the outlet of the first-stage three-way pipe, then the operation of the step three is repeated, water in the standard flowmeter is pushed out and dried, the humidity sensor transmits a measured humidity signal to the console and displays the humidity signal through the display screen, and the drying degree is judged according to the humidity of the blown gas until the drying degree reaches a standard range;
and step six, after the washing and drying are finished, the standard component is detached from the component to be calibrated, and the calibration process is finished.
The working principle of the embodiment is as follows: when calibration is carried out, firstly, the pipeline at the input end of the buffer pipeline 8 is connected with the second-stage three-way pipe 5, the pipeline at the output end of the calibration flowmeter is connected with the third-stage three-way pipe 6, then the third valve and the first valve on the first-stage three-way pipe 7 are closed, the fourth valves 18 on the second-stage three-way pipe 5 and the third-stage three-way pipe 6 are opened, simultaneously the second valves 3 at two ends of the flowmeter 1 to be calibrated and the first valves at two ends of the standard flowmeter 2 are opened, so that the pipelines among the flowmeter 1 to be calibrated, the buffer pipeline 8, the filter, the standard flowmeter 2 and the output liquid pipe 12 are communicated, liquid flows through the flowmeter 1 to be calibrated, the buffer pipeline 8 and enters the filter through the infusion inlet pipe, the liquid flows through the standard flowmeter 2, the first-stage three-way pipe 7 and the third-stage three-way pipe, the PLC transmits signals to a display screen for data display and comparison, the flowmeter 1 to be calibrated is adjusted according to an error range, the on-site on-line calibration function is realized, after calibration is completed, the standard flowmeter 2 needs to be washed and dried, a rubber plug is opened to discharge filtered liquid in a filter box 9 through a water outlet hole, a fourth valve 18 on a second-stage three-way pipe 5 is closed, an air pump is started to convey gas in a gas storage tank 11 into a buffer pipeline 8, the gas passes through the filter box 9 and the standard flowmeter 2 and then enters a transfusion outlet pipe, so that residual liquid in the buffer pipeline 8 and the pipeline of the standard flowmeter 2 is conveyed into the transfusion outlet pipe, residual liquid is discharged, the situation that the residual liquid is remained in the standard flowmeter 2 to corrode the standard flowmeter 2 to cause accuracy reduction is avoided, after the discharge is completed, the air pump and the fourth valve 18 on a third-stage three-way pipe 6 are closed, opening a first valve on a first-stage three-way pipe 7, then starting a water pump to perform back flushing on a buffer pipeline 8, a filter screen 20 in a filter box 9 and a standard flowmeter 2, enabling the flushed water to flow out of the first-stage three-way pipe 7, enabling a humidity sensor 16 to be located above the outlet end of the first-stage three-way pipe 7, discharging the water in the filter box 9 through a water outlet hole after the flushing is completed, then closing the water pump to repeat the air conveying operation to dry the standard flowmeter 2, discharging the air through the first-stage three-way pipe 7, arranging clean air in an air storage tank 11, rotating a moving rod 13 when the drying is performed, enabling the humidity sensor 16 to be located at the outlet end of the first-stage three-way pipe 7, monitoring the humidity of the discharged air in real time, enabling the humidity sensor 16 to transmit a humidity signal to a PLC (programmable logic controller) and transmit the humidity signal to a display screen for displaying, after the calibration is completed, the movable rod is rotated to enable the movable rod to approach the first-stage three-way pipe until the humidity sensor enters the first-stage three-way pipe, and the humidity sensor is protected.
Compared with the prior art, the embodiment has the following beneficial effects:
by arranging the gas transmission assembly and the water transmission assembly on the standard assembly, residual liquid in the standard flowmeter pipeline can be conveyed into the infusion outlet pipe, so that the residual liquid is prevented from being wasted and polluting the surrounding environment, the standard flowmeter pipeline can be washed and dried, the cleanliness of the standard flowmeter is ensured, and the influence on the accuracy of the standard flowmeter due to corrosion of the residual liquid is avoided; make humidity transducer can stretch into in the one-level tee bend pipe through rotating the carriage release lever, play the guard action to humidity transducer, avoid carrying the standard subassembly in-process and make humidity transducer damage because of the collision.
It will be understood by those skilled in the art that the on-line calibration apparatus and calibration method for a flowmeter of the present invention includes any combination of the inventive content and the embodiments of the present invention described above and shown in the accompanying drawings, which is not described in detail or in detail for the sake of brevity. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The on-line calibrating device for the flowmeter comprises a component to be calibrated and a standard component, wherein the component to be calibrated is connected with the standard component, and the on-line calibrating device is characterized in that: the standard assembly comprises a standard flowmeter, a filter, a buffer pipeline and a flushing assembly, wherein the input end of the standard flowmeter is connected with the filter, the output end of the standard flowmeter is connected with the assembly to be calibrated, the input end of the buffer pipeline is respectively connected with the assembly to be calibrated and the flushing assembly, and the output end of the buffer pipeline is connected with the filter; the flushing component comprises a gas transmission component and a water transmission component, a first-stage three-way pipe is arranged on an output pipeline of the standard flowmeter, and a humidity detection component is arranged at the outlet end of the first-stage three-way pipe;
the humidity detection assembly comprises a fixed block, a moving rod, a spring and a humidity sensor, the fixed block is fixedly connected with the primary three-way pipe, the moving rod penetrates through the fixed block and is in threaded connection with the fixed block, a chuck is arranged at one end of the moving rod, the spring is sleeved on the moving rod between the chuck and the fixed block, the humidity sensor is arranged on the side wall of the other end of the moving rod, the moving rod is of an L-shaped structure, and the spring is always in a compressed state;
the filter includes rose box, filter screen, the bottom of rose box is spherical structure, the bottom of rose box is equipped with the apopore, the filter screen sets up just can reciprocate in the rose box in the filter box, the filter screen with rose box inner wall threaded connection, be fixed with the bull stick on the filter screen, the one end of bull stick runs through the rose box.
2. The online calibration device for the flowmeter as set forth in claim 1, wherein: the input pipeline and the output pipeline of the standard flowmeter are respectively provided with a first valve and a first pressure gauge, and the flowmeter to be calibrated and the standard flowmeter are respectively provided with a flow sensor.
3. The online calibration device for the flowmeter as set forth in claim 1, wherein: the device comprises a to-be-calibrated component, a to-be-calibrated flowmeter, an infusion inlet pipe and an infusion outlet pipe, wherein the to-be-calibrated flowmeter is connected with the infusion inlet pipe and the infusion outlet pipe respectively, a second valve and a second pressure gauge are arranged on the infusion inlet pipe and the infusion outlet pipe respectively, a second-stage three-way pipe and a third-stage three-way pipe are arranged on the infusion outlet pipe, and a third valve is arranged on the infusion outlet pipe between the second-stage three-way pipe and the third-stage three-way pipe.
4. The online calibration device for the flowmeter as claimed in claim 3, wherein: the second three-way pipe is connected with the input end of the buffer pipeline, and the third three-way pipe is connected with the output pipeline of the standard flowmeter; and the first-stage three-way pipe, the second-stage three-way pipe and the third-stage three-way pipe are respectively provided with a fourth valve.
5. The online calibration device for the flowmeter as set forth in claim 4, wherein: the gas transmission assembly comprises a gas storage tank and an air pump, the input end of the air pump is connected with the gas storage tank, and the output end of the air pump is connected with the input end of the buffer pipeline.
6. The online calibration device for the flowmeter as set forth in claim 5, wherein: the water delivery assembly comprises a water storage tank and a water pump, the input end of the water pump is communicated with the water storage tank, and the output end of the water pump is connected with the input end of the buffer pipeline; and fifth valves are respectively arranged on the pipelines of the air pump and the water pump.
7. The online calibration device for the flowmeter as set forth in claim 6, wherein: the online calibration device of the flowmeter further comprises a console, and the console is connected with the humidity sensor and the flow sensor respectively.
8. The method for calibrating the flowmeter online calibration device according to any one of claims 1-7, comprising the following steps in sequence:
step one, mounting a standard component on a component to be calibrated, opening fourth valves on a second-stage three-way pipe and a third-stage three-way pipe, and closing the fourth valve on a first-stage three-way pipe to enable an infusion inlet pipe, a flowmeter to be calibrated, a buffer pipeline, a filter, a standard flowmeter and an infusion outlet pipe to form a calibration loop;
step two, closing a fifth valve and a third valve on an infusion outlet pipe, enabling liquid in the infusion inlet pipe to enter a filter box through a flowmeter to be calibrated and a buffer pipeline for filtering, conveying the liquid filtered by a filter screen into a standard flowmeter, then enabling the liquid to enter an infusion outlet pipe through a three-stage three-way pipe, respectively transmitting flow signals to a control console by flow sensors on the flowmeter to be calibrated and the standard flowmeter, and displaying and comparing through a display screen, so that the flowmeter to be calibrated is verified according to comparison data;
step three, after the calibration is finished, removing residual liquid in the pipeline of the standard flowmeter, closing a fourth valve on the second-stage three-way pipe, opening a fifth valve on the air pump, opening a water outlet hole in the filter box, discharging the filtered residual liquid, enabling the rotating rod to rotate to push the filter screen to move downwards until the filter screen is positioned below the input end of the filter box, then starting the air pump to convey clean air in the air storage tank to the buffer pipeline, entering the standard flowmeter through the filter box, and pushing the residual liquid into the infusion outlet pipe;
step four, flushing the residual liquid after the residual liquid is pushed, closing an air pump, opening a water pump and a first valve on a first-stage three-way pipe, conveying water in a water storage tank into a buffer pipeline, entering a standard flowmeter through a filter box, and discharging the water through the outlet end of the first-stage three-way pipe, wherein a humidity sensor is positioned above the first-stage three-way pipe;
step five, after the flushing is finished, the water pump is closed, the moving rod is rotated to enable the humidity sensor to be aligned to the outlet of the first-stage three-way pipe, then the operation of the step three is repeated, water in the standard flowmeter is pushed out and dried, the humidity sensor transmits a measured humidity signal to the console and displays the humidity signal through the display screen, and the drying degree is judged according to the humidity of the blown gas until the drying degree reaches a standard range;
and step six, after the washing and drying are finished, the standard component is detached from the component to be calibrated, and the calibration process is finished.
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| CN112577571B (en) * | 2020-12-11 | 2024-04-16 | 浙江启尔机电技术有限公司 | Liquid supply system with sensor calibration flow path and calibration method thereof |
| CN113082822A (en) * | 2021-04-23 | 2021-07-09 | 承德石油高等专科学校 | Filtering liquid-changing device |
| CN114440133A (en) * | 2021-12-17 | 2022-05-06 | 河南平高电气股份有限公司 | For SF6Monitoring module of inflation and deflation recovery device and flow meter deviation rectifying method |
| CN117007138A (en) * | 2023-08-09 | 2023-11-07 | 新疆生产建设兵团建设工程(集团)有限责任公司 | Rock mass water flow monitoring device |
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