CN110243539B - Online pressure ratio is to detection device - Google Patents
Online pressure ratio is to detection device Download PDFInfo
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- CN110243539B CN110243539B CN201910683187.2A CN201910683187A CN110243539B CN 110243539 B CN110243539 B CN 110243539B CN 201910683187 A CN201910683187 A CN 201910683187A CN 110243539 B CN110243539 B CN 110243539B
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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
Abstract
The invention discloses an online pressure ratio pair detection device, which comprises a standard meter connected with a comparison pipeline, a first connecting end connected with an on-site meter, and a comparison device connected with the first connecting end and the standard meter and used for receiving and comparing an on-site measurement value and a standard measurement value. The pipeline where the on-site meter is located is provided with a comparison pipeline which is connected in parallel, the standard meter is connected with the comparison pipeline, and the standard measurement value measured by the standard meter is equal to the on-site measurement value of the on-site meter according to the principle of a communicating vessel. The comparison device is connected with the field meter through the first connecting end, receives and compares the field measurement value and the standard measurement value, and can judge whether the field meter is accurate or not through the comparison result, so that the field meter can be compared and detected without being detached, and if the field meter is inaccurate, the field meter can be directly corrected. Thereby ensuring that the on-site meter can provide accurate on-site measurement values for the control system.
Description
Technical Field
The invention relates to the technical field of meter detection, in particular to an online pressure ratio pair detection device.
Background
Industries such as electric power, petroleum, chemical industry and the like adopt a large number of pressure meters to measure production parameters in real time, and control and adjust each control valve according to measurement results, so that the accuracy of the meters directly influences the normal production of enterprises.
In the prior art, once the meter fails or measurement is inaccurate, a common processing method is to remove the meter and bring the meter back to a laboratory for verification. However, part of the meter can not be removed in the normal production process, and the fault operation can bring great potential safety hazard to the production.
Therefore, how to provide an online pressure ratio detection device is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide an online pressure ratio comparison detection device, which connects a standard meter and an on-site meter in parallel to realize online comparison detection of the on-site meter.
In order to achieve the above object, the present invention provides an online pressure ratio pair detection device, which comprises a standard meter connected to a comparison pipeline, a first connection end connected to a field meter, and a comparison device connected to the first connection end and the standard meter for receiving and comparing a field measurement value and a standard measurement value.
Preferably, the comparison means comprises a first comparator for comparing the deviation value of the field measurement value and the standard measurement value with a preset deviation.
Preferably, the device also comprises an alarm device which is connected with the comparison device and used for sending an alarm value to a tester when the deviation value is greater than the preset deviation.
Preferably, the comparison device further comprises a second comparator for comparing the standard measurement value with a first preset value.
Preferably, the comparison device further comprises a second connecting end used for being connected with an isolation valve on the comparison pipeline, the second connecting end is connected with the comparison device, and the comparison device further comprises an actuator used for closing the isolation valve when the standard measurement value is larger than a first preset value.
Preferably, the comparison device further comprises a third comparator for comparing the standard measurement value with a second preset value.
Preferably, the device further comprises a display device connected with the comparison device, and when the deviation value is greater than the preset deviation, the display device prompts that the on-site meter is damaged; and when the standard measurement value is smaller than a second preset value, the display device prompts that the pipeline is blocked.
Preferably, the display device is further configured to display the field measurement value and the standard measurement value in real time.
The invention provides an online pressure ratio pair detection device, which comprises a standard meter connected with a comparison pipeline, a first connecting end connected with an on-site meter, and a comparison device connected with the first connecting end and the standard meter and used for receiving and comparing an on-site measurement value and a standard measurement value.
The pipeline where the on-site meter is located is provided with a comparison pipeline which is connected in parallel, the standard meter is connected with the comparison pipeline, and the standard measurement value measured by the standard meter is equal to the on-site measurement value of the on-site meter according to the principle of a communicating vessel. The comparison device is connected with the field meter through the first connecting end, receives and compares the field measurement value and the standard measurement value, and can judge whether the field meter is accurate or not through the comparison result, so that the field meter can be compared and detected without being detached, and if the field meter is inaccurate, the field meter can be directly corrected. Thereby ensuring that the on-site meter can provide accurate on-site measurement values for the control system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an online pressure ratio pair detection device provided by the present invention.
Wherein the reference numerals in fig. 1 are:
the device comprises a pressure measuring pipeline 1, a comparison pipeline 2, a field meter 3, an isolation valve 4, a standard meter 5, a comparison device 6, a first connection end 7, a second connection end 8 and a DCS system 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an online pressure ratio pair detection device provided in the present invention.
The structure of the online pressure ratio pair detection device provided by the invention is shown in figure 1, and the online pressure ratio pair detection device comprises a standard meter 5, a comparison device 6 and a first connection end 7. The on-site pressure measuring pipeline 1 is provided with a comparison pipeline 2 for comparing and detecting an on-site meter 3, and a standard meter 5 is connected with the comparison pipeline 2 and can measure a standard measurement value of the pressure measuring pipeline 1, namely the actual pressure of the pressure measuring pipeline 1. The comparison device 6 is connected to a standard meter 5, and the standard meter 5 transmits the standard measurement value to the comparison device 6. The comparison device 6 is also connected to the site meter 3 via a first connection 7 and obtains a site measurement value, i.e. a measurement result of the site meter 3. The field measurement values are then compared to the standard measurement values. If the deviation value between the compared field measurement value and the standard measurement value is larger, the field meter 3 is indicated to have a fault, and the meter personnel can directly repair the field meter 3. Wherein, the comparing device 6 can be a MCU microprocessor or a PLC controller, etc.
Optionally, the comparing device 6 includes a calculator for calculating a deviation value between the field measurement value and the standard measurement value, and a first comparator for comparing the deviation value of the field measurement value and the standard measurement value with a preset deviation. And if the deviation value is larger than the preset deviation, the damage of the site meter 3 is indicated.
Optionally, the online pressure ratio pair detection device further comprises an alarm device connected with the comparison device 6. When the deviation value is larger than the preset deviation, the comparison device 6 sends an alarm signal to the alarm device, and when the alarm device receives the alarm signal, the alarm device sends an alarm to a tester. The alarm device may be embodied as a buzzer, an alarm lamp, or the like.
Inaccuracies in the field measurement values of the field meters 3 can be caused on the one hand by a fault in the meters themselves and on the other hand also by a fault in the pipeline. The comparison means 6 therefore also comprise a third comparator for comparing the standard measurement value with a second preset value. The control device can judge the reason of inaccurate field measurement values according to the comparison results of the first comparator and the third comparator. Specifically, if the deviation value between the field measurement value and the standard measurement value is greater than the preset deviation, and the standard measurement value is not less than the second preset value, it indicates that the field meter 3 itself is faulty; and if the deviation value is smaller than the preset deviation and the standard measurement value is smaller than a second preset value, indicating that the pipeline is blocked.
Furthermore, the online pressure ratio pair detection device also comprises a display device, the display device is connected with the comparison device 6, and the display device can display the field measurement value and the standard measurement value. The comparing device 6 can also judge the reason of inaccurate field measurement values and display the fault reason through the display device. Specifically, when the deviation value is larger than the preset deviation, the display device prompts that the site meter 3 is damaged; and when the standard measurement value is smaller than a second preset value, the display device prompts that the pipeline is blocked.
In addition, damage to the site gauges 3 may be caused by piping overpressure, which may easily cause damage to the standard gauges 5 if the standard gauges 5 are accessed. Therefore, the comparison pipeline 2 is provided with the isolation valve 4, and the online pressure ratio pair detection device further comprises a second connecting end 8 for connecting the comparison device 6 and the isolation valve 4. The comparison device 6 comprises a third comparator for comparing the standard measurement value with a first preset value, the first preset value is less than or equal to the measurement limit of the standard meter 5, the comparison device 6 further comprises an actuator connected with the third comparator, and the actuator is connected with the isolation valve 4. When the standard measurement value is larger than the first preset value, the actuator sends a closing instruction to the isolation valve 4, and the isolation valve 4 is closed immediately after receiving the closing instruction, so that the standard meter 5 is prevented from being damaged. The structure of the first connection end 7 and the second connection end 8 can refer to the prior art, and is not described in detail herein.
Furthermore, the comparison site meter 3 and the standard meter 5 in the laboratory are usually curve-fitted by five different measured values, and whether the site meter 3 is damaged or not is judged by comparing the deviation degree of the fitted curve. When the on-line comparison is carried out to detect the on-site meter 3, the pressure of the system needs to be changed, and then five different measurement values are selected. Therefore, the comparison device 6 is further connected with the DCS system 9, the comparison device 6 further includes a disturbance module, the disturbance module can send a pressure disturbance instruction to the DCS system 9, and after receiving the pressure disturbance instruction, the DCS system 9 adjusts the pressure of the pipeline where the site meter 3 is located, so that the pressure fluctuates. And then the on-site meter 3 and the standard meter 5 measure a plurality of changed pressure values, and a plurality of different measured values are selected for curve fitting to judge whether the on-site meter 3 is damaged. Of course, the pressure fluctuation range generated by the pressure disturbance command is within the allowable pressure fluctuation range for normal production. The comparison device 6 and the DCS system 9 may be wirelessly communicated through WiFi or bluetooth, or may be connected through a data line for wired communication. In order to save the cost of the enterprise, the pressure disturbance instruction can also be issued to the DCS 9 by the operator.
Furthermore, the display device can also display a time-pressure curve measured by the field meter 3 and the standard meter 5, and a meter personnel can judge whether the field meter 3 is damaged or not according to experience by comparing the time-pressure curve.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The online pressure ratio provided by the present invention has been described in detail above with respect to the sensing device. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (3)
1. An on-line pressure ratio pair detection device, characterized by comprising a standard meter (5) for connecting with a comparison pipeline (2), a first connection end (7) for connecting with a field meter (3), and a comparison device (6) connected with the first connection end (7) and the standard meter (5) and used for receiving and comparing a field measurement value and a standard measurement value;
the comparison device (6) comprises a first comparator for comparing the deviation value of the field measurement value and the standard measurement value with a preset deviation;
the comparison device (6) further comprises a second comparator for comparing the standard measurement value with a first preset value;
the comparison device is characterized by further comprising a second connecting end (8) connected with the isolation valve (4) on the comparison pipeline (2), wherein the second connecting end (8) is connected with the comparison device (6), and the comparison device (6) further comprises an actuator used for closing the isolation valve (4) when the standard measurement value is larger than a first preset value;
the comparison means (6) further comprise a third comparator for comparing the standard measurement value with a second preset value;
the device also comprises a display device connected with the comparison device (6), and when the deviation value is greater than the preset deviation, the display device prompts that the site meter (3) is damaged; when the standard measurement value is smaller than a second preset value, the display device prompts that the pipeline is blocked;
the comparison device (6) is further connected with a DCS (distributed control system) system (9), the comparison device (6) further comprises a disturbance module, the disturbance module can send a pressure disturbance instruction to the DCS system (9), after the DCS system (9) receives the pressure disturbance instruction, the pressure of a pipeline where the site meter (3) is located is adjusted, the pressure fluctuates, the site meter (3) and the standard meter (5) measure a plurality of changed pressure values, a plurality of different measured values are selected for curve fitting, and whether the site meter (3) is damaged or not is judged.
2. An on-line pressure ratio pair detection device according to claim 1, further comprising alarm means connected to said comparison means (6) for providing an alarm value to a test person when said deviation value is greater than said predetermined deviation.
3. The online pressure ratio pair detection device of claim 1, wherein the display device is further configured to display the live measurement value and the standard measurement value in real time.
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| CN201910683187.2A CN110243539B (en) | 2019-07-26 | 2019-07-26 | Online pressure ratio is to detection device |
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| CN110243539B true CN110243539B (en) | 2022-03-11 |
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