WO2024051234A1 - 压力变送器在线标定系统及方法 - Google Patents
压力变送器在线标定系统及方法 Download PDFInfo
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- WO2024051234A1 WO2024051234A1 PCT/CN2023/098727 CN2023098727W WO2024051234A1 WO 2024051234 A1 WO2024051234 A1 WO 2024051234A1 CN 2023098727 W CN2023098727 W CN 2023098727W WO 2024051234 A1 WO2024051234 A1 WO 2024051234A1
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- Prior art keywords
- isolation
- pressure transmitter
- filling
- flange
- isolation channel
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 143
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 40
- 238000012795 verification Methods 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
Definitions
- the invention belongs to the field of pressure transmitter calibration, and in particular relates to an online calibration system and method for a pressure transmitter.
- the calibration of a pressure transmitter refers to using a certain standard instrument to test the pressure transmitter under the premise that the input and output correspond to each other.
- the pressure transmitter When the pressure transmitter is produced, its technical performance needs to be calibrated to ensure accurate transmission of measured values. After the pressure transmitter is used, stored or repaired, the technical performance needs to be calibrated again to ensure that the pressure transmitter can be used normally.
- the pressure transmitter when calibrating a pressure transmitter, the pressure transmitter needs to be transported to the location of the calibration equipment so that the pressure transmitter can be calibrated using a certain standard instrument. Especially when recalibrating a pressure transmitter that is put into use, the pressure transmitter needs to be removed from the site and then transported to the location of the calibration equipment before calibration can be performed. After the calibration is completed, it is transported back to the site of use for installation. The whole process is time-consuming and labor-intensive, and the return transportation of the pressure transmitter can easily lead to measurement deviations in the pressure transmitter.
- the purpose of the present invention is to provide an online calibration system and method for a pressure transmitter to solve the problems of the prior art.
- the present invention provides an online calibration system for a pressure transmitter, which includes an isolation pressure sensing unit.
- the isolation pressure sensing unit is disposed between the pressure transmitter and the medium pipeline.
- the isolation pressure sensing unit The pressure unit includes a connecting flange, a first isolation channel for filling the isolation liquid is provided on the connecting flange, and the first isolation channel is opened along the axial direction of the connecting flange; the connecting flange It includes a first end close to the medium pipeline and a second end close to the pressure transmitter.
- the first end of the connecting flange is provided with a first diaphragm for sealing the first isolation channel.
- the second end of the connecting flange A second diaphragm for sealing the first isolation channel is provided; a filling port and a discharge port are provided on the connecting flange, and the filling port and the discharge port are connected with the first isolation channel, and the filling port
- the opening is opened on the upper side wall of the first isolation channel, and the row A discharge opening is provided on the lower side wall of the first isolation channel; a shut-off valve is provided between the medium pipeline and the isolation pressure-taking unit.
- an isolation flange is provided between the connecting flange and the medium pipe, a second isolation channel is provided on the isolation flange, and the second isolation channel is provided through the axial direction of the isolation flange.
- the second isolation channel is filled with isolation liquid;
- the isolation flange includes a first end for connecting with the medium pipeline and a second end for connecting with the connecting flange, and the third end of the isolation flange One end is provided with a third diaphragm for isolation between the isolation liquid and the medium in the medium pipeline, and the first diaphragm is arranged between the second end of the isolation flange and the first end of the connecting flange, so The second diaphragm is disposed between the connecting flange and the pressure transmitter.
- a connecting pipe is connected to the filling port, and one end of the connecting pipe away from the connecting flange is connected to a filling unit for filling the isolation liquid and a calibration unit for pressure transmitter calibration.
- the calibration unit includes a pressure calibrator.
- the filling unit includes a vacuum pump for evacuating the first isolation channel and a filling assembly for filling the first isolation channel with isolation liquid.
- the filling unit and the verification unit are integrated into one body.
- a first stop valve is provided between the filling unit and the connecting pipe
- a second stop valve is provided between the verification unit and the connecting pipe
- a third stop valve is provided on the connecting pipe.
- the present invention also provides an online calibration method of a pressure transmitter, which is applied to the above-mentioned online calibration system of the pressure transmitter.
- the online calibration method of the pressure transmitter includes:
- the pressure transmitter online calibration system and method of the present invention have the following beneficial effects:
- the first isolation channel is filled with isolation liquid and the medium tube
- the medium pressure in the channel is transmitted to the pressure transmitter through the first diaphragm, the isolation liquid, and the second diaphragm, so that the medium pressure can be detected through the pressure transmitter.
- the medium pipe is intercepted, and then the isolation liquid in the first isolation channel is discharged, and then the pressure transmitter can be calibrated. After the verification is completed, fill the isolation fluid.
- the setting of the isolated pressure sensing unit in this solution allows the pressure transmitter to be calibrated without disassembly, and after the calibration is completed, it can be quickly put into normal use. Compared with the existing technology, there is no need to install or transport the pressure transmitter after calibration, which effectively improves the accuracy of monitoring the pressure transmitter after calibration and simplifies the calibration process.
- the arrangement of the first diaphragm and the second diaphragm not only isolates the isolation liquid, but also transmits the medium pressure.
- Figure 1 is a schematic structural diagram of an online calibration system for a pressure transmitter in an embodiment of the present invention.
- Figure 2 is a partial cross-sectional view of the pressure transmitter online calibration system in the embodiment of the present invention.
- the reference numbers in the drawings of the description include: pressure transmitter 1, medium pipeline 2, connecting flange 301, first isolation channel 3011, first diaphragm 3012, second diaphragm 3013, discharge pipe 3014, discharge valve 3015, connection Pipe 3016, third stop valve 3017, filling port 3018, discharge port 3019, isolation flange 302, second isolation channel 3021, third diaphragm 3022, calibration unit 4, pressure calibrator 401, first stop valve 402 , filling unit 5, filling assembly 501, second stop valve 502.
- This application provides an online calibration system and method for a pressure transmitter. Please refer to Figure 1 and Figure 2 for details.
- an online calibration system for a pressure transmitter including an isolated pressure-taking unit.
- the isolated pressure-taking unit is disposed between the pressure transmitter 1 and the medium pipeline 2.
- the isolated pressure-taking unit includes a connection method.
- the connecting flange 301 is provided with a first isolation channel 3011 for filling the isolation liquid, and the first isolation channel 3011 is opened along the axial direction of the connecting flange 301 .
- the connecting flange 301 includes a first end close to the medium pipe 2 and a second end close to the pressure transmitter 1.
- the first end of the connecting flange 301 is provided with a first diaphragm 3012 for sealing the first isolation channel 3011.
- the connection method The second end of the orchid 301 is provided with a second membrane 3013 for sealing the first isolation channel 3011.
- the first end of the connecting flange 301 is connected to the medium pipeline 2
- the second end of the connecting flange 301 is connected to the input end of the pressure transmitter 1 .
- the first isolation channel 3011 is filled with isolation liquid, and the medium pressure in the medium pipeline 2 is transmitted to the pressure transformer through the first diaphragm 3012, the isolation liquid, and the second diaphragm 3013.
- Transmitter 1 to detect the medium pressure through pressure transmitter 1.
- the pressure transmitter 1 is calibrated, the medium pipeline 2 is intercepted, and then the isolation liquid in the first isolation channel 3011 is discharged, and then the pressure transmitter 1 can be calibrated. After the verification is completed, the first isolation channel 3011 is evacuated and then filled with isolation liquid.
- an isolation flange 302 is provided between the connecting flange 301 and the medium pipeline 2.
- a second isolation channel 3021 is opened on the isolation flange 302.
- the second isolation channel 3021 is along the edge of the isolation flange 302.
- the isolation flange 302 includes a first end for connecting to the medium pipeline 2 and a second end for connecting to the connecting flange 301.
- the first end of 302 is provided with a third diaphragm 3022 for isolation between the isolation liquid and the medium in the medium pipeline 2.
- the first diaphragm 3012 is provided between the second end of the isolation flange 302 and the first end of the connecting flange 301.
- the second diaphragm 3013 is provided between the connecting flange 301 and the pressure transmitter 1 .
- isolation flange 302 is provided to protect the first diaphragm 3012 and the third diaphragm 3022 when the first isolation channel 3011 is evacuated.
- the isolation flange 302 is provided with a filling port 3018 for filling the isolation liquid in the first isolation channel 3011 and a discharge port 3019 for discharging the isolation liquid in the first isolation channel 3011 .
- the filling port 3018 is provided to fill the isolation liquid.
- the discharge port 3019 is opened to facilitate the discharge of the isolation liquid.
- a discharge pipe 3014 is provided at the outlet of the discharge port 3019, and a discharge valve 3015 is provided on the discharge pipe 3014.
- the filling port 3018 is opened above the discharge port 3019 to facilitate the discharge of the isolation liquid.
- the filling port 3018 is connected to a connecting pipe 3016, and one end of the connecting pipe 3016 away from the connecting flange 301 is connected to the filling unit 5 for filling the isolation liquid and the calibration verification of the pressure transmitter 1.
- the isolation liquid is filled into the first isolation channel 3011 through the filling unit 5.
- the discharge pipe 3014 is opened. Drain valve 3015 to drain the isolation fluid.
- the calibration unit 4 includes a pressure calibrator 401 .
- the pressure transmitter 1 is inspected by connecting a pressure tester to the filling port 3018 .
- the filling unit 5 includes a vacuum pump for evacuating the first isolation channel 3011 and a filling assembly 501 for filling the first isolation channel 3011 with isolation liquid.
- the isolation liquid is filled through the filling assembly 501, so that the medium pressure in the medium pipe 2 is transmitted to the Pressure transmitter 1, performs medium pressure detection.
- the pressure transmitter 1 is calibrated, the medium pipe 2 is closed, and the discharge valve 3015 is opened to discharge the isolation liquid in the first isolation channel 3011. Then the discharge valve 3015 is closed, and the pressure transmitter 1 is calibrated through the calibration unit 4. of calibration. After the calibration of the pressure transmitter 1 is completed, the first isolation channel 3011 is evacuated, and then filled with isolation liquid.
- the filling liquid is silicone oil.
- the filling assembly 501 includes an oil barrel for containing silicone oil, an oil suction valve and an oil outlet pipe for extracting silicone oil from the oil barrel.
- the filling unit 5 and the verification unit 4 are integrated into one body.
- the filling unit 5 and the verification unit 4 are integrated into one body for easy portability.
- the calibration unit 4 and the filling unit 5 are installed on the filling port 3018, and then the pressure transmitter 1 can be calibrated, which is easy to use.
- a first stop valve 402 is provided between the filling unit 5 and the connecting pipe 3016, and a second stop valve 502 is provided between the verification unit 4 and the connecting pipe 3016. There is a third stop valve 3017.
- the medium pipeline 2 is provided with a shut-off valve.
- the shut-off valve is opened, and the first isolation channel 3011 is filled with isolation liquid.
- the discharge valve 3015 is opened. After the isolation liquid in the first isolation channel 3011 is discharged, the discharge valve 3015 is closed, and the third stop valve 3017 and the second stop valve 502 are opened. Conducted in test unit 4 Calibration of pressure transmitter 1.
- the second stop valve 502 is closed, the first stop valve 402 is opened, the first isolation channel 3011 is evacuated by the vacuum pump, and then the filling assembly 501 is filled with the isolation liquid. After the filling is completed, the first stop valve 402 is closed. and the third stop valve 3017, open the stop valve, that is, the pressure transmitter 1 is put into normal use.
- this application also provides an online pressure transmitter calibration method, including:
- Step S1 close the shutoff valve, open the discharge port 3019, and drain the isolation liquid in the first isolation channel 3011.
- Step S2 close the discharge port 3019 and open the filling port 3018 to calibrate the pressure transmitter.
- the pressure transmitter is calibrated through the pressure calibrator 401.
- step S3 after the calibration is completed, the first isolation channel 3011 is evacuated.
- the first isolation channel 3011 is evacuated using a vacuum pump.
- Step S4 Fill the first isolation channel 3011 with isolation liquid after vacuuming, and open the shut-off valve to put the pressure transmitter into normal use.
- the first isolation channel 3011 is filled with isolation liquid through the filling unit 5 .
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
一种压力变送器（1）在线标定系统及方法，压力变送器（1）在线标定系统包括隔离取压单元，隔离取压单元包括连接法兰（301），连接法兰（301）上开设有用于灌充隔离液的第一隔离通道（3011），第一隔离通道（3011）沿着连接法兰（301）的轴向贯穿开设；连接法兰（301）包括靠近介质管道（2）的第一端和靠近压力变送器（1）的第二端，连接法兰（301）的第一端设置有用于密封第一隔离通道（3011）的第一隔膜（3012），连接法兰（301）的第二端设置有用于密封第一隔离通道（3011）的第二隔膜（3013）；连接法兰（301）上开设有充灌口（3018）和排放口（3019），充灌口（3018）和排放口（3019）与第一隔离通道（3011）连通，且充灌口（3018）开设在第一隔离通道（3011）的上侧壁上，排放口（3019）开设在第一隔离通道（3011）的下侧壁上；介质管道（2）与隔离取压单元之间设置有截流阀，实现了压力变送器（1）的在线标定。
Description
本发明属于压力变送器标定领域，特别是涉及一种压力变送器在线标定系统及方法。
压力变送器的标定是指在输入和输出对应的前提关系下，利用某种标准器具对压力变送器进行检测。压力变送器生产完成的时候都需要对其技术性能进行标定，以保证测量值的准确传递。压力变送器经过使用、存储或者修理后，需要再次进行技术性能的标定，以保证压力变送器能正常使用。
目前，压力变送器标定时，需要将压力变送器运输至标定设备位置，以通过某种标准器具对压力变送器进行标定。特别是投入使用的压力变送器再标定时，需要将压力变送器从现场拆除，然后搬运至标定设备位置，之后才能进行标定，标定完成后再运输返回使用现场进行安装。整个过程费事费力，且压力变送器回运过程中容易导致压力变送器出现测量偏差的问题。
发明内容
鉴于以上所述现有技术的缺点，本发明的目的在于提供一种压力变送器在线标定系统及方法，用于解决现有技术中等问题。
为实现上述目的及其他相关目的，本发明提供一种压力变送器在线标定系统，包括隔离取压单元，所述隔离取压单元设置在压力变送器和介质管道之间，所述隔离取压单元包括连接法兰，所述连接法兰上开设有用于灌充隔离液的第一隔离通道，所述第一隔离通道沿着所述连接法兰的轴向贯穿开设；所述连接法兰包括靠近介质管道的第一端和靠近压力变送器的第二端，所述连接法兰的第一端设置有用于密封第一隔离通道的第一隔膜，所述连接法兰的第二端设置有用于密封第一隔离通道的第二隔膜；所述连接法兰上开设有充灌口和排放口，所述充灌口和排放口与所述第一隔离通道连通，且所述充灌口开设在所述第一隔离通道的上侧壁上，所述排
放口开设在所述第一隔离通道的下侧壁上；所述介质管道与所述隔离取压单元之间设置有截流阀。
进一步地，所述连接法兰和介质管道之间设置有隔离法兰，所述隔离法兰上开设有第二隔离通道，所述第二隔离通道沿着所述隔离法兰的轴向贯穿设置，且所述第二隔离通道内填充有隔离液；所述隔离法兰包括用于与介质管道连接的第一端和用于与连接法兰连接的第二端，所述隔离法兰的第一端设置有用于隔离液和介质管道内介质之间隔离的第三隔膜，所述第一隔膜设置在所述隔离法兰的第二端与所述连接法兰的第一端之间，所述第二隔膜设置在所述连接法兰和所述压力变送器之间。
进一步地，所述充灌口上连接有连接管，所述连接管远离所述连接法兰的一端连接有用于隔离液填充的充灌单元以及压力变送器标定的校验单元。
进一步地，所述校验单元包括压力校验仪。
进一步地，所述充灌单元包括用于对第一隔离通道内进行抽真空的真空泵以及用于对第一隔离通道内进行隔离液充灌的填充组件。
进一步地，所述充灌单元和所述校验单元集成为一体。
进一步地，所述充灌单元与所述连接管之间设置有第一截止阀，所述校验单元的与所述连接管之间设置有第二截止阀，所述连接管上设置有第三截止阀。
为实现上述目的及其他相关目的，本发明还提供了一种压力变送器在线标定方法，应用于上述的压力变送器在线标定系统，压力变送器在线标定方法包括：
关闭截流阀，并打开排放口，对第一隔离通道内的隔离液进行排空；
关闭排放口并打开充灌口，对压力变送器进行标定；
标定完成后，对第一隔离通道内进行抽真空；
向抽真空后的第一隔离通道内充灌隔离液，并打开截流阀，使压力变送器投入正常使用。
如上所述，本发明的压力变送器在线标定系统及方法，具有以下有益效果：
压力变送器正常使用过程中，在第一隔离通道内填充隔离液，介质管
道内的介质压力经过第一隔膜、隔离液、第二隔膜传递至压力变送器，以通过压力变送器实现介质压力的检测。压力变送器标定时，对介质管道进行截流，然后排出第一隔离通道内的隔离液，即可进行压力变送器的校验。校验完成后，填充隔离液即可。
本方案中隔离取压单元的设置，使得压力变送器无需拆下即可进行标定，且标定完成后可以快速的投入到正常使用中。与现有技术相比，无需标定后对压力变送器进行安装，也无需进行运输，有效的提高了压力变送器标定后监测的准确性，简化了标定过程。第一隔膜和第二隔膜的设置，不仅起到了隔离液的隔离，还起到了介质压力的传递。
图1为本发明实施例中压力变送器在线标定系统的结构示意图。
图2为本发明实施例中压力变送器在线标定系统的局部剖视图。
说明书附图中的附图标记包括：压力变送器1、介质管道2、连接法兰301、第一隔离通道3011、第一隔膜3012、第二隔膜3013、排放管3014、排放阀3015、连接管3016、第三截止阀3017、充灌口3018、排放口3019、隔离法兰302、第二隔离通道3021、第三隔膜3022、校验单元4、压力校验仪401、第一截止阀402、充灌单元5、填充组件501、第二截止阀502。
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。
本申请提供了一种压力变送器在线标定系统及方法，具体参考附图1和附图2。
在一示例性实施例中，提供了一种压力变送器在线标定系统，包括隔离取压单元隔离取压单元设置在压力变送器1和介质管道2之间，隔离取压单元包括连接法兰301，连接法兰301上开设有用于灌充隔离液的第一隔离通道3011，第一隔离通道3011沿着连接法兰301的轴向贯穿开设。连接法兰301包括靠近介质管道2的第一端和靠近压力变送器1的第二端，连接法兰301的第一端设置有用于密封第一隔离通道3011的第一隔膜3012，连接法兰301的第二端设置有用于密封第一隔离通道3011的第二隔膜3013。
示例性的，连接法兰301的第一端与介质管道2连接，连接法兰301的第二端与压力变送器1的输入端连接。
值得说明的是，压力变送器1正常使用过程中，在第一隔离通道3011内填充隔离液，介质管道2内的介质压力经过第一隔膜3012、隔离液、第二隔膜3013传递至压力变送器1，以通过压力变送器1实现介质压力的检测。压力变送器1标定时，对介质管道2进行截流，然后排出第一隔离通道3011内的隔离液，即可进行压力变送器1的校验。校验完成后，对第一隔离通道3011进行抽真空，然后填充隔离液即可。
在一示例性实施例中，连接法兰301和介质管道2之间设置有隔离法兰302，隔离法兰302上开设有第二隔离通道3021，第二隔离通道3021沿着隔离法兰302的轴向贯穿设置，且第二隔离通道3021内填充有隔离液；隔离法兰302包括用于与介质管道2连接的第一端和用于与连接法兰301连接的第二端，隔离法兰302的第一端设置有用于隔离液和介质管道2内介质之间隔离的第三隔膜3022，第一隔膜3012设置在隔离法兰302的第二端与连接法兰301的第一端之间，第二隔膜3013设置在连接法兰301和压力变送器1之间。
值得说明的是，隔离法兰302的设置，以在第一隔离通道3011进行抽真空时保护第一隔膜3012和第三隔膜3022。
在一示例性实施例中，隔离法兰302上开设有用于第一隔离通道3011内隔离液体灌充的充灌口3018以及用于第一隔离通道3011内隔离液排放的排放口3019。
值得说明的是，充灌口3018的设置，以进行隔离液的充灌。排放口3019的开设，以便于隔离液的排放。排放口3019的出口设置有排放管3014，排放管3014上设置有排放阀3015。
示例性的，充灌口3018开设在排放口3019的上方，以便于隔离液的排放。
在一示例性实施例中，充灌口3018上连接有连接管3016，连接管3016远离连接法兰301的一端连接有用于隔离液填充的充灌单元5以及压力变送器1标定的校验单元4。
值得说明的是，当压力变送器1投入正常使用时，通过充灌单元5向第一隔离通道3011内充入隔离液体，在压力变送器1进行标定时，打开排放管3014上设置的排放阀3015，以进行隔离液的排放。
在一示例性实施例中，校验单元4包括压力校验仪401。
本实施例中通过在充灌口3018上连接压力检验仪，以实现压力变送器1的检验。
在一示例性实施例中，充灌单元5包括用于对第一隔离通道3011内进行抽真空的真空泵以及用于对第一隔离通道3011内进行隔离液充灌的填充组件501。
在本实施例中，压力变送器1投入正常使用时，通过填充组件501进行隔离液的填充，使得介质管道2内介质压力经过第三隔膜3022、第一隔膜3012和第二隔膜3013传递至压力变送器1，进行介质压力检测。当压力变送器1进行标定时，关闭介质管道2，并打开排放阀3015，使得第一隔离通道3011内的隔离液排出，然后关闭排放阀3015，通过校验单元4进行压力变送器1的标定。压力变送器1标定完成后，对第一隔离通道3011进行抽真空，之后填充隔离液即可。
示例性的，填充液为硅油。
示例性的，填充组件501包括用于装硅油的油桶、用于将油桶中硅油抽出的吸油阀以及出油管等。
在一示例性实施例中，充灌单元5和校验单元4集成为一体。
本方案中，将充灌单元5与校验单元4集成为一体，以便于携带。在需要进行压力变送器1校验时，将校验单元4和充灌单元5安装到充灌口3018上，然后即可进行压力变送器1的校验，使用方便。
在一示例性实施例中，充灌单元5与连接管3016之间设置有第一截止阀402，校验单元4的与连接管3016之间设置有第二截止阀502，连接管3016上设置有第三截止阀3017。介质管道2上设置有截流阀。
在本实施例中，当压力变送器1投入正常使用时，开启截流阀，且在第一隔离通道3011内填充隔离液。当压力变送器1进行标定时，开启排放阀3015，将第一隔离通道3011内的隔离液排放完成后，关闭排放阀3015，并打开第三截止阀3017和第二截止阀502，通过校验单元4进行
压力变送器1的标定。当标定完成后，关闭第二截止阀502，打开第一截止阀402，通过真空泵对第一隔离通道3011进行抽真空，然后填充组件501进行隔离液的填充，填充完成后关闭第一截止阀402和第三截止阀3017，打开截流阀，即使得压力变送器1投入正常使用。
针对上述压力变送器在线标定系统，本申请还提供了一种压力变送器在线标定方法，包括：
步骤S1，关闭截流阀，并打开排放口3019，对第一隔离通道3011内的隔离液进行排空。
步骤S2，关闭排放口3019并打开充灌口3018，对压力变送器进行标定。
具体地，通过压力校验仪401对压力变送器进行校验。
步骤S3，标定完成后，对第一隔离通道3011内进行抽真空。
具体地，通过真空泵对第一隔离通道3011内进行抽真空处理。
步骤S4，向抽真空后的第一隔离通道3011内充灌隔离液，并打开截流阀，使压力变送器投入正常使用。
具体地，通过充灌单元5对第一隔离通道3011内进行隔离液填充。
值得说明的是，由于在系统实施例中已经对方法实施例的内容进行公开，在此不在赘述。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。
Claims (8)
- 一种压力变送器在线标定系统，其特征在于，包括隔离取压单元，所述隔离取压单元设置在压力变送器和介质管道之间，所述隔离取压单元包括连接法兰，所述连接法兰上开设有用于灌充隔离液的第一隔离通道，所述第一隔离通道沿着所述连接法兰的轴向贯穿开设所述连接法兰包括靠近介质管道的第一端和靠近压力变送器的第二端，所述连接法兰的第一端设置有用于密封第一隔离通道的第一隔膜，所述连接法兰的第二端设置有用于密封第一隔离通道的第二隔膜；所述连接法兰上开设有充灌口和排放口，所述充灌口和排放口与所述第一隔离通道连通，且所述充灌口开设在所述第一隔离通道的上侧壁上，所述排放口开设在所述第一隔离通道的下侧壁上；所述介质管道与所述隔离取压单元之间设置有截流阀。
- 根据权利要求1所述的压力变送器在线标定系统，其特征在于，所述连接法兰和介质管道之间设置有隔离法兰，所述隔离法兰上开设有第二隔离通道，所述第二隔离通道沿着所述隔离法兰的轴向贯穿设置，且所述第二隔离通道内填充有隔离液；所述隔离法兰包括用于与介质管道连接的第一端和用于与连接法兰连接的第二端，所述隔离法兰的第一端设置有用于隔离液和介质管道内介质之间隔离的第三隔膜，所述第一隔膜设置在所述隔离法兰的第二端与所述连接法兰的第一端之间，所述第二隔膜设置在所述连接法兰和所述压力变送器之间。
- 根据权利要求1所述的压力变送器在线标定系统，其特征在于，所述充灌口上连接有连接管，所述连接管远离所述连接法兰的一端连接有用于隔离液填充的充灌单元以及压力变送器标定的校验单元。
- 根据权利要求3所述的压力变送器在线标定系统，其特征在于，所述校验单元包括压力校验仪。
- 根据权利要求3所述的压力变送器在线标定系统，其特征在于，所述充灌单元包括用于对第一隔离通道内进行抽真空的真空泵以及用于对第一隔离通道内进行隔离液充灌的填充组件。
- 根据权利要求3所述的压力变送器在线标定系统，其特征在于，所述充灌单元和所述校验单元集成为一体。
- 根据权利要求3-6中任一项所述的压力变送器在线标定系统，其特 征在于，所述充灌单元与所述连接管之间设置有第一截止阀，所述校验单元的与所述连接管之间设置有第二截止阀，所述连接管上设置有第三截止阀。
- 一种压力变送器在线标定方法，其特征在于，应用于权利要求1-7中任一项所述的压力变送器在线标定系统，所述方法包括：关闭截流阀，并打开排放口，对第一隔离通道内的隔离液进行排空；关闭排放口并打开充灌口，对压力变送器进行标定；标定完成后，对第一隔离通道内进行抽真空；向抽真空后的第一隔离通道内充灌隔离液，并打开截流阀，使压力变送器投入正常使用。
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