CN215004083U - Static pressure characteristic testing device of differential pressure transmitter - Google Patents
Static pressure characteristic testing device of differential pressure transmitter Download PDFInfo
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- CN215004083U CN215004083U CN202121186566.XU CN202121186566U CN215004083U CN 215004083 U CN215004083 U CN 215004083U CN 202121186566 U CN202121186566 U CN 202121186566U CN 215004083 U CN215004083 U CN 215004083U
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- 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
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Abstract
The application discloses differential pressure transmitter static pressure characteristic test device, this differential pressure transmitter static pressure characteristic test device includes: the pressure measuring device comprises a differential pressure transmitter, a first pressure regulating device, a second pressure regulating device and a pressure measuring instrument; the first pressure regulating device and the second pressure regulating device are respectively connected with the high-pressure end and the low-pressure end of the differential pressure transmitter; the pressure measuring instrument is connected in parallel with the high-pressure end and the low-pressure end of the differential pressure transmitter and is positioned between the first pressure regulating device and the second pressure regulating device, and a control valve is arranged between the pressure measuring instrument and the high-pressure end of the differential pressure transmitter. The purpose that the error value of the differential pressure transmitter under each pressure point can be obtained after the numerical value of reading the differential pressure transmitter and the pressure measuring instrument is calculated is achieved, the technical effect of quickly and simply evaluating the static pressure characteristic of the differential pressure transmitter is achieved, and the problems that in the related technology, the static pressure characteristic evaluation device of the differential pressure transmitter is complex in operation, high in operation requirement and low in measuring efficiency are solved.
Description
Technical Field
The application relates to the field of differential pressure transmitter detection, in particular to a static pressure characteristic testing device of a differential pressure transmitter.
Background
The high-precision differential pressure transmitter is needed to be used when the effective area of the piston type pressure gauge is verified, so that the static pressure characteristic of the differential pressure transmitter needs to be evaluated before the effective area of the piston is verified, namely, the error values of each upper travel point and each lower travel point under each pressure point of the differential pressure transmitter are integrally evaluated, and the differential pressure transmitter with the precision meeting the requirement is selected. However, the static pressure characteristic evaluation method of the differential pressure transmitter in the related art is carried out by using a standard piston pressure gauge, the judgment of a piston balance point needs to be carried out manually, and the problems of complex operation, high operation requirement and low measurement efficiency exist.
Aiming at the problems of complex operation, high operation requirement and low measurement efficiency of a static pressure characteristic evaluation device of a differential pressure transmitter in the related technology, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The main purpose of this application is to provide a differential pressure transmitter static pressure characteristic test device to solve the problem that differential pressure transmitter's static pressure characteristic evaluation device has the operation complicacy among the correlation technique, and the operation requires highly, and measurement of efficiency is low.
In order to achieve the above object, the present application provides a differential pressure transmitter static pressure characteristic testing apparatus, including: the pressure measuring device comprises a differential pressure transmitter, a first pressure regulating device, a second pressure regulating device and a pressure measuring instrument; the first pressure regulating device and the second pressure regulating device are respectively connected with the high-pressure end and the low-pressure end of the differential pressure transmitter; the pressure measuring instrument is connected in parallel with the high-pressure end and the low-pressure end of the differential pressure transmitter and is positioned between the first pressure regulating device and the second pressure regulating device, and a control valve is arranged between the pressure measuring instrument and the high-pressure end of the differential pressure transmitter.
Further, the first pressure regulating device comprises a first pressure regulator, and the second pressure regulating device comprises a second pressure regulator and a pressure source; the second pressure regulating device and the pressure source are connected in parallel at the low-pressure end of the differential pressure transmitter.
Further, the pressure source is provided as a pressure checker.
Further, the first pressure regulating device comprises a piston type pressure gauge, and the piston type pressure gauge is connected with the high-pressure end of the differential pressure transmitter; the second pressure regulating device comprises a third pressure regulator, and the third pressure regulator is connected with the low-pressure end of the differential pressure transmitter.
Furthermore, the first pressure regulator is connected with the high-pressure end of the differential pressure transmitter through a first pipeline, and the second pressure regulator is connected with the pressure source in parallel and then connected with the low-pressure end of the differential pressure transmitter through a second pipeline; the pressure measuring instrument is connected to the first pipeline and the second pipeline in parallel through a third pipeline.
Further, the piston type pressure gauge is connected with the high-pressure end of the differential pressure transmitter through a fourth pipeline; the third pressure regulator is connected with the low-pressure end of the differential pressure transmitter through a fifth pipeline;
and the pressure measuring instrument is connected to the fourth pipeline and the fifth pipeline in parallel through a sixth pipeline.
Further, the control valve is provided as a shutoff valve.
Further, the pressure measuring instrument is a digital pressure gauge or a pressure sensor.
In the embodiment of the application, a differential pressure transmitter, a first pressure regulating device, a second pressure regulating device and a pressure measuring instrument are arranged; the first pressure regulating device and the second pressure regulating device are respectively connected with the high-pressure end and the low-pressure end of the differential pressure transmitter; the pressure measuring instrument is connected in parallel with the high-pressure end and the low-pressure end of the differential pressure transmitter and is positioned between the first pressure regulating device and the second pressure regulating device, the control valve is arranged between the pressure measuring instrument and the high-pressure end of the differential pressure transmitter, the purpose that the error value of the differential pressure transmitter under each pressure point can be obtained after the numerical value of the differential pressure transmitter and the pressure measuring instrument is read for calculation is achieved, the technical effect of quickly and simply evaluating the static pressure characteristic of the differential pressure transmitter is achieved, and the problems that the static pressure characteristic evaluating device of the differential pressure transmitter in the related technology is complex in operation, high in operation requirement and low in measuring efficiency are solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic structural diagram according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram according to another embodiment of the present application;
the pressure measuring device comprises a first pressure regulating device 1, a differential pressure transmitter 2, a second pressure regulating device 3, a first pressure regulator 4, a pressure source 5, a pressure measuring instrument 6, a control valve 7, a second pressure regulator 8, a third pressure regulator 9 and a piston type pressure gauge 10.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used.
In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Before the differential pressure transmitter is used, the errors of the differential pressure transmitter under different static pressure conditions need to be evaluated so as to judge whether the differential pressure transmitter meets the use requirements. Need use standard piston pressure gauge among the traditional measurement process, because the piston shape size among the standard piston pressure gauge is fixed, therefore the pressure point of piston is fixed for it is accurate inadequately to differential pressure transmitter's measurement, and measurement process needs the manual work to judge whether balanced piston pressure gauge, and the judgement error is big, and the operation requirement is high, and whole testing process is complicated, and efficiency is lower. The present embodiments thus provide a differential pressure transmitter static pressure characteristic testing method by which differential pressure transmitter performance is more accurately demonstrated.
As shown in fig. 1 to 2, an embodiment of the present application provides a static pressure characteristic testing apparatus for a differential pressure transmitter, where the static pressure characteristic testing apparatus for a differential pressure transmitter 2 includes: the pressure measuring device comprises a differential pressure transmitter 2, a first pressure regulating device 1, a second pressure regulating device 3 and a pressure measuring instrument 6; the first pressure regulating device 1 and the second pressure regulating device 3 are respectively connected with the high-pressure end and the low-pressure end of the differential pressure transmitter 2; the pressure measuring instrument 6 is connected in parallel with the high-pressure end and the low-pressure end of the differential pressure transmitter 2 and is positioned between the first pressure regulating device 1 and the second pressure regulating device 3, and a control valve 7 is arranged between the pressure measuring instrument 6 and the high-pressure end of the differential pressure transmitter 2.
The testing device measures by taking the high-pressure end of the differential pressure transmitter 2 as a static pressure condition, and comprises the following steps during use:
connecting a differential pressure transmitter 2 to a first pressure regulating device 1 and a second pressure regulating device 3, wherein one of the first pressure regulating device 1 and the second pressure regulating device 3 is used as a pressure source of a system, so that the pressure of the system is increased to a measuring point, and the other one is used for adjusting the pressure of the system;
connecting a pressure measuring instrument 6 to a high-pressure end and a low-pressure end of the differential pressure transmitter 2 in parallel, wherein the pressure measuring instrument 6 can be a digital pressure measuring instrument or a pressure sensor and has the characteristic of high-precision measurement;
keeping the high-pressure end and the low-pressure end of the differential pressure transmitter 2 communicated, in one embodiment, as shown in fig. 1, controlling the second pressure regulating device 3 to enable the system pressure to rise to a measuring point, recording the indication value of the differential pressure transmitter 2 and the indication value Pl of the pressure measuring instrument 6, wherein the pressure values of the high-pressure end and the low-pressure end of the differential pressure transmitter 2 are the same, the pressure of the whole measuring system is balanced, and the pressure Pl of the low-pressure end and the high-pressure end of the differential pressure transmitter 2 is accurately obtained through the pressure measuring instrument 6;
disconnecting the high-pressure end of the differential pressure transmitter 2 from the pressure measuring instrument 6, and keeping the indication value of the differential pressure transmitter 2 unchanged; the high-pressure end of the differential pressure transmitter 2 is originally communicated with the pressure measuring instrument 6, the volume of a pipeline is changed after the differential pressure transmitter 2 is disconnected, so that the indication value of the differential pressure transmitter 2 can be changed, and in order to ensure the accuracy of a measuring result, the first pressure regulating device 1 positioned at the high-pressure end of the differential pressure transmitter 2 needs to be regulated, so that the indication value of the differential pressure transmitter 2 is kept unchanged; the disconnection and the communication between the high-pressure end of the differential pressure transmitter 2 and the pressure measuring instrument 6 can be realized through a control valve 7, and the control valve 7 can be a stop valve;
the pressure at the low-pressure end of the differential pressure transmitter 2 is reduced or increased by controlling the second pressure regulating device 3, the indication value variation of the pressure measuring instrument 6 is obtained, when the variation reaches a preset upper stroke differential pressure point or a preset lower stroke differential pressure point, the indication value Ph of the pressure measuring instrument 6 and the indication value delta P of the differential pressure transmitter 2 are recorded1；
At the moment, the high-pressure end of the differential pressure transmitter 2 is disconnected with the second pressure regulating device 3, namely the pressure of the high-pressure end of the differential pressure transmitter 2 is kept unchanged, the pressure of the low-pressure end of the differential pressure transmitter 2 is reduced through the second pressure regulating device 3, when the pressure of the low-pressure end is reduced to a set upper stroke differential pressure point, the pressure measuring instrument 6 obtains the actual pressure Ph of the system, and the differential pressure delta P displayed on the high-pressure end and the low-pressure end of the differential pressure transmitter 2 is obtained1And obtaining the actual differential pressure delta P at the upper stroke differential pressure point through the actual system pressure Ph-Pl2By Δ P2And Δ P1The difference value of the differential pressure transmitter 2 under the current upper stroke differential pressure point or the lower stroke differential pressure point is obtained, so that the measurement of one upper stroke differential pressure point is completed, the operation is repeated until the measurement of other upper stroke differential pressure points is completed, and then the differential pressure is transmitted through the second pressure regulating device 3The pressure at the low-pressure end of the device 2 rises, and the measurement of other lower stroke differential pressure points is completed in the same way, so that error values of a plurality of upper stroke differential pressure points and lower stroke differential pressure points of the differential pressure transmitter 2 under the static pressure condition are obtained;
in order to obtain the error values of the differential pressure transmitter 2 under the upper stroke differential pressure point and the lower stroke differential pressure point under other static pressure conditions, the pressure measuring instrument 6 is communicated with the low pressure end of the differential pressure transmitter 2 after the measurement under one static pressure condition is finished, the system pressure is increased to other pressure points through the second pressure regulating device 3, and the steps are repeated to finish the error value measurement under the upper stroke differential pressure point and the lower stroke differential pressure point.
And evaluating all error values of the obtained differential pressure transmitter 2 under different static pressure conditions, different upper stroke differential pressure points and lower stroke differential pressure points, and judging whether the error value of the differential pressure transmitter 2 meets the requirement or not.
Similarly, as shown in fig. 2, in another embodiment, the system pressure is raised to the measurement point by the first pressure regulating device 1, then the control valve 7 is closed, and the second pressure regulating device 3 is adjusted to adjust the pressure at the low-pressure end of the differential pressure transmitter 2, so as to complete the evaluation of all error values of different static pressure conditions, different upper stroke differential pressure points and lower stroke differential pressure points.
As shown in fig. 1, the first pressure regulating device 1 comprises a first pressure regulator 4, the second pressure regulating device 3 comprises a second pressure regulator 8 and a pressure source 5; the second pressure regulating device 3 and the pressure source 5 are connected in parallel at the low-pressure end of the differential pressure transmitter 2, and the pressure source 5 is set as a pressure checker. The device is applied to the embodiment that the system pressure is increased to a measuring point through the second pressure regulating device 3, the system pressure is increased through the pressure calibrator, the pressure at the low-pressure end of the differential pressure transmitter 2 is regulated through the second pressure regulator 8, and the second pressure regulator 8 has the function of fine adjustment, so that the system pressure can be rounded.
As shown in fig. 2, the first pressure regulating device 1 includes a piston type pressure gauge 10, and the piston type pressure gauge 10 is connected to the high-pressure end of the differential pressure transmitter 2; the second pressure regulating means 3 comprises a third pressure regulator 9, the third pressure regulator 9 being connected to the low pressure side of the differential pressure transmitter 2. In the embodiment in which the system pressure is increased to a measurement point by the first pressure adjusting device 1, the system pressure is increased by the piston type pressure gauge 10, the pressure at the low pressure end of the differential pressure transmitter 2 is adjusted by the third pressure adjuster 9, and the piston type pressure gauge 10 needs to be kept unchanged and kept at the working position when the control valve 7 is closed in the use process.
As shown in fig. 1, the first pressure regulator 4 is connected with the high-pressure end of the differential pressure transmitter 2 through a first pipeline, and the second pressure regulator 8 is connected with the pressure source 5 in parallel and then connected with the low-pressure end of the differential pressure transmitter 2 through a second pipeline; the pressure measuring instrument 6 is connected to the first pipeline and the second pipeline in parallel through a third pipeline.
As shown in fig. 2, the piston type pressure gauge is connected to the high-pressure end of the differential pressure transmitter 2 through a fourth pipeline; the third pressure regulator 9 is connected with the low-pressure end of the differential pressure transmitter 2 through a fifth pipeline; the pressure measuring instrument 6 is connected in parallel to the fourth pipeline and the fifth pipeline through the sixth pipeline.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A static pressure characteristic testing device of a differential pressure transmitter is characterized by comprising: the pressure measuring device comprises a differential pressure transmitter, a first pressure regulating device, a second pressure regulating device and a pressure measuring instrument; wherein,
the first pressure regulating device and the second pressure regulating device are respectively connected with the high-pressure end and the low-pressure end of the differential pressure transmitter;
the pressure measuring instrument is connected in parallel with the high-pressure end and the low-pressure end of the differential pressure transmitter and is positioned between the first pressure regulating device and the second pressure regulating device, and a control valve is arranged between the pressure measuring instrument and the high-pressure end of the differential pressure transmitter.
2. The differential pressure transmitter static pressure characteristic testing apparatus of claim 1, wherein the first pressure regulating apparatus comprises a first pressure regulator and the second pressure regulating apparatus comprises a second pressure regulator and a pressure source; the second pressure regulating device and the pressure source are connected in parallel at the low-pressure end of the differential pressure transmitter.
3. The differential pressure transmitter static pressure characteristic testing apparatus of claim 2, wherein the pressure source is configured as a pressure verifier.
4. The differential pressure transmitter static pressure characteristic testing apparatus of claim 1, wherein the first pressure regulating apparatus comprises a piston gauge connected to a high pressure end of the differential pressure transmitter;
the second pressure regulating device comprises a third pressure regulator, and the third pressure regulator is connected with the low-pressure end of the differential pressure transmitter.
5. The differential pressure transmitter static pressure characteristic testing device of claim 2, wherein the first pressure regulator is connected with the high pressure end of the differential pressure transmitter through a first pipeline, and the second pressure regulator is connected with the pressure source in parallel and then connected with the low pressure end of the differential pressure transmitter through a second pipeline;
the pressure measuring instrument is connected to the first pipeline and the second pipeline in parallel through a third pipeline.
6. The differential pressure transmitter static pressure characteristic testing device according to claim 4, wherein the piston type pressure gauge is connected with a high pressure end of the differential pressure transmitter through a fourth pipeline; the third pressure regulator is connected with the low-pressure end of the differential pressure transmitter through a fifth pipeline;
and the pressure measuring instrument is connected to the fourth pipeline and the fifth pipeline in parallel through a sixth pipeline.
7. The differential pressure transmitter static pressure characteristic testing apparatus of claim 1, wherein the control valve is provided as a shut-off valve.
8. The differential pressure transmitter static pressure characteristic testing apparatus according to claim 1, wherein the pressure gauge is provided as a digital display type pressure gauge or a pressure sensor.
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| CN2021104450089 | 2021-04-24 | ||
| CN202110445008 | 2021-04-24 |
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| CN215004083U true CN215004083U (en) | 2021-12-03 |
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| CN202121186566.XU Active CN215004083U (en) | 2021-04-24 | 2021-05-29 | Static pressure characteristic testing device of differential pressure transmitter |
| CN202110606592.1A Active CN113532734B (en) | 2021-04-24 | 2021-05-29 | Static pressure characteristic test and effective area verification method for piston pressure gauge of differential pressure transmitter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235274A (en) * | 2021-12-14 | 2022-03-25 | 泰安佳业环保科技有限公司 | Pressure and differential pressure checking system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3404634A1 (en) * | 1984-02-09 | 1985-08-14 | Siemens AG, 1000 Berlin und 8000 München | Device for setting differential pressures with high precision |
| CN2828776Y (en) * | 2005-06-21 | 2006-10-18 | 上海威尔泰工业自动化股份有限公司 | Static pressure drift testing device of differential transmitter |
| DE102005049870B4 (en) * | 2005-10-18 | 2008-03-27 | Siemens Ag | Method and device for detecting a faulty connection of a differential pressure sensor |
| CN101476962B (en) * | 2009-01-20 | 2010-11-03 | 山东省计量科学研究院 | Piston type or buoy type pressure meter effective area measuring method |
| CN101532897B (en) * | 2009-03-26 | 2010-11-24 | 云南大红山管道有限公司 | Long distance slurry pipeline transportation pressure detection system and detection method |
| CN202928741U (en) * | 2012-11-08 | 2013-05-08 | 林华 | Static pressure drift detection device for differential pressure transmitter |
| CN104655364B (en) * | 2015-03-13 | 2017-10-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Partial pressure mode high static pressure differential pressure generating and method |
| CN207301826U (en) * | 2017-09-21 | 2018-05-01 | 河北省计量监督检测研究院 | Industrial differential pressure control device detection device |
| CN112556926B (en) * | 2020-12-11 | 2024-10-15 | 上海市计量测试技术研究院 | Automatic detection device and detection method for static pressure performance of differential pressure transmitter |
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- 2021-05-29 CN CN202121186566.XU patent/CN215004083U/en active Active
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235274A (en) * | 2021-12-14 | 2022-03-25 | 泰安佳业环保科技有限公司 | Pressure and differential pressure checking system and method |
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| CN113532734B (en) | 2022-05-20 |
| CN113532734A (en) | 2021-10-22 |
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