CN112525521B - Method, terminal, medium and valve positioner for detecting bite-clamping fault of regulating valve - Google Patents
Method, terminal, medium and valve positioner for detecting bite-clamping fault of regulating valve Download PDFInfo
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- CN112525521B CN112525521B CN202011338110.0A CN202011338110A CN112525521B CN 112525521 B CN112525521 B CN 112525521B CN 202011338110 A CN202011338110 A CN 202011338110A CN 112525521 B CN112525521 B CN 112525521B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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Abstract
The invention provides a method, a terminal, a medium and a valve positioner for detecting a clamping fault of a regulating valve, wherein the method is characterized in that a standard air inlet curve, a standard air outlet curve, a current air inlet curve and a current air outlet curve are respectively determined, and then the state of the regulating valve is determined according to at least one of an air inlet curve pair and an air outlet curve pair, wherein the air inlet curve pair comprises the standard air inlet curve and the current air inlet curve, and the air outlet curve pair comprises the standard air outlet curve and the current air outlet curve, so that the clamping fault of the regulating valve can be detected through a machine, the detection accuracy is better, the timeliness of the detection of the clamping fault of the valve can be improved through adjusting the determination frequency of the current air inlet curve and the current air outlet curve, the detection cost of the clamping fault of the valve is reduced, and the operation safety of the regulating valve and the accuracy of valve control are improved.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method for detecting a bite card fault of an adjusting valve, a terminal, a medium and a valve positioner.
Background
The intelligent valve positioner is a field control instrument widely applied to the fields of petrochemical industry and the like, is a main accessory of a regulating valve, is usually matched with a pneumatic regulating valve for use, and has the functions of receiving a control command from central control and accurately controlling the opening of the valve.
Because the use frequency of the regulating valve is higher, the valve biting fault can occur due to factors such as filler abrasion in the regulating valve. At present, the fault state of the bite card of the regulating valve is often detected manually at regular intervals, the fault abnormality is found to be poor in timeliness, and the detection cost is high.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is directed to providing a method, a terminal, a medium and a valve positioner for detecting a bite-blocking failure of a regulating valve, which are used for solving the technical problems of poor timeliness and high detection cost of detecting the bite-blocking failure of the regulating valve by manually and periodically detecting the bite-blocking failure of the regulating valve in the related art.
The invention provides a method for detecting a bite card fault of an adjusting valve, which comprises the following steps:
acquiring a plurality of sample air inlet valve openings and sample air inlet pressure values corresponding to the sample air inlet valve openings, determining a standard air inlet curve, wherein the sample air inlet valve openings and the sample air inlet pressure values are self-inspected at a regulating valve, and collecting air in an air inlet process of a regulating valve cylinder;
Acquiring a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings, determining a standard exhaust curve, wherein the sample exhaust valve openings and the sample exhaust pressure values are self-inspected at the regulating valve, and collecting the cylinder exhaust process of the regulating valve;
controlling the air inlet of the regulating valve under the working state of the regulating valve, acquiring a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
controlling the regulating valve to exhaust under the working state of the regulating valve, obtaining a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve;
and determining a bite-clamping fault state of the regulating valve according to at least one of an air inlet curve pair and an air outlet curve pair, wherein the air inlet curve pair comprises the standard air inlet curve and the current air inlet curve, and the air outlet curve pair comprises the standard air outlet curve and the current air outlet curve.
Optionally, the determining the bite-card fault state of the regulating valve according to the air inlet curve pair or the air outlet curve pair includes:
acquiring a current air inlet error area, wherein the current air inlet error area is the area of a closed graph formed by enclosing the standard air inlet curve and the current air inlet curve by fitting the standard air inlet curve and the current air inlet curve to the same coordinate system;
Acquiring a current exhaust error area, wherein the current exhaust error area is the area of a closed graph formed by enclosing the standard exhaust curve and the current exhaust curve by fitting the standard exhaust curve and the current exhaust curve to the same coordinate system;
and determining a stuck fault state of the regulating valve according to at least one of the current air inlet error area and the current air outlet error area.
Optionally, at least one of the following is further included:
if the regulating valve clamping fault state is determined according to the current air inlet error area, determining that the current air inlet error area is larger than a first area threshold, wherein the regulating valve clamping fault state comprises clamping risk;
if the regulating valve clamping fault state is determined according to the current exhaust error area, wherein the current exhaust error area is larger than a second area threshold value, and the regulating valve clamping fault state comprises clamping risks;
if the regulating valve clamping fault state is determined according to the current air inlet error area and the current air outlet error area, the current air inlet error area is determined to be larger than the first area threshold value, the current air outlet error area is larger than the second area threshold value, and the regulating valve clamping fault state comprises clamping risks.
Optionally, at least one of the following is further included:
controlling the air inlet of the regulating valve at intervals of a first preset time, acquiring a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
and controlling the regulating valve to exhaust at intervals of a second preset time, acquiring a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve.
Optionally, at least one of the following is further included:
before a standard air inlet curve is determined, sliding filtering processing is carried out on the opening of the sample air inlet valve and the sample air inlet pressure value;
before determining a standard exhaust curve, performing sliding filtering processing on the opening of the sample exhaust valve and the sample exhaust pressure value;
before determining a current air inlet curve, performing sliding filtering processing on the current air inlet valve opening and the current air inlet pressure value;
and before determining a current exhaust curve, performing sliding filtering processing on the current exhaust valve opening and the current exhaust pressure value.
Optionally, if the regulating valve seizing fault state includes that there is a seizing risk, the regulating valve seizing fault state determining method further includes at least one of the following:
Sending out an alarm message;
prompting to overhaul the regulating valve.
Optionally, the method further comprises:
and acquiring a maintenance completion signal of the regulating valve, and carrying out self-inspection on the regulating valve again to determine a new standard air inlet curve and a new standard air outlet curve.
The invention also provides a valve positioner comprising:
the standard air inlet curve determining module is used for obtaining a plurality of sample air inlet valve openings and sample air inlet pressure values corresponding to the sample air inlet valve openings, determining a standard air inlet curve, wherein the sample air inlet valve openings and the sample air inlet pressure values are self-detected at the regulating valve, and the air inlet process of the regulating valve cylinder is collected;
the standard exhaust curve determining module is used for obtaining a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings, determining a standard exhaust curve, wherein the sample exhaust valve openings and the sample exhaust pressure values are self-inspected at the regulating valve, and the regulating valve cylinder exhaust process is collected;
the current air inlet curve determining module is used for controlling the air inlet of the regulating valve under the working state of the regulating valve, obtaining a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
The current exhaust curve determining module is used for controlling the regulating valve to exhaust under the working state of the regulating valve, obtaining a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve;
the regulating valve clamping fault state determining module is used for determining the regulating valve clamping fault state according to at least one of an air inlet curve pair and an air outlet curve pair, wherein the air inlet curve pair comprises the standard air inlet curve and the current air inlet curve, and the air outlet curve pair comprises the standard air outlet curve and the current air outlet curve.
The invention also provides a terminal, which comprises a processor, a memory and a communication bus;
the communication bus is used for connecting the processor and the memory;
the processor is configured to execute a computer program stored in the memory to implement the regulating valve bite fault detection method according to any one of the above embodiments.
The present invention also provides a computer-readable storage medium, having stored thereon a computer program,
the computer program for causing the computer to execute the regulating valve bite-card failure detection method according to any one of the above embodiments.
As described above, the regulating valve bite fault detection method, terminal, medium and valve positioner provided by the invention have the following beneficial effects:
the regulation valve clamping fault condition is determined according to at least one of the pair of air inlet curves and the pair of air outlet curves, the pair of air inlet curves comprises the standard air inlet curve and the current air inlet curve, the pair of air outlet curves comprises the standard air outlet curve and the current air outlet curve, the regulation valve clamping fault condition can be detected through a machine, the detection accuracy and the timeliness are better, the timeliness of the regulation valve clamping fault condition discovery caused by the reasons of filler abrasion and the like can be improved through adjusting the determination frequency of the current air inlet curve and the current air outlet curve, the discovery cost of the valve clamping fault is reduced, and the operation safety and the valve control accuracy of the regulation valve are improved.
Drawings
FIG. 1 is a schematic flow chart of a method for detecting a bite-blocking fault of an adjusting valve according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a regulating valve according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of an intelligent valve positioner according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a standard air intake curve and a current air intake curve according to a first embodiment of the present invention fitted to the same coordinate system;
FIG. 5 is a schematic diagram of a standard exhaust curve and a current exhaust curve fitting to the same coordinate system according to a first embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for detecting a bite-blocking failure of an adjusting valve according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a valve positioner according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a method for detecting a bite-card fault of an adjusting valve, including:
s101: acquiring a plurality of sample air inlet valve openings and sample air inlet pressure values corresponding to the sample air inlet valve openings, and determining a standard air inlet curve;
s102: acquiring a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings, and determining a standard exhaust curve;
s103: controlling the air inlet of the regulating valve under the working state of the regulating valve, acquiring a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
s104: under the working state of the regulating valve, controlling the regulating valve to exhaust, obtaining a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve;
S105: and determining the bite-clamping fault state of the regulating valve according to at least one of the air inlet curve pair and the air outlet curve pair.
Optionally, the sample intake air pressure value is a pressure value in a regulator valve cylinder.
Optionally, the opening of the sample air inlet valve and the sample air inlet pressure value are both self-detected at the regulating valve, and the air inlet process of the regulating valve cylinder is collected.
Optionally, the opening of the sample exhaust valve and the sample exhaust pressure value are both self-detected at the regulating valve, and the cylinder exhaust process of the regulating valve is collected.
Optionally, the intake curve pair includes a standard intake curve and a current intake curve, and the exhaust curve pair includes a standard exhaust curve and a current exhaust curve.
In some embodiments, the method for detecting a bite-blocking fault of a regulating valve provided by the embodiments of the present invention is applied to a regulating valve, referring to fig. 2, fig. 2 is a schematic structural diagram of the regulating valve, as shown in fig. 2, the regulating valve includes a valve body 1, a packing 2, a valve 3, an actuator 4, and an intelligent valve positioner 5, where the actuator 4 includes a plurality of groups of springs 6, the intelligent valve positioner includes an I/P module 7, a processing module 8, and a sensor module 9, and the sensor module 9 is used to measure a position of the valve 3 and a pressure in a cylinder of the actuator 4, and send measured data to the processing module 8 for collection; the processing module 8 is configured to collect data of the valve position sensor and control command data of the central control through the AD module, convert the data into percentages, and determine whether the I/P module 7 needs to intake or exhaust by comparing the percentages of the valve position sensor and the command percentages, and of course, there are generally a key module, a display module, a valve position feedback module, etc. on the processing module, which is not limited herein; the I/P module 7 is used to control the intake or exhaust of the actuator 4. When the air is introduced or exhausted from the actuator 4, the valve 3 is pushed to move downwards or upwards, the valve opening is reduced or increased, and at the same time, the sensor module 9 monitors the movement of the valve 3, and then the valve opening is obtained. The sample air inlet valve opening, the sample air outlet valve opening, the current air inlet valve opening and the current air outlet valve opening can be obtained through the sensor module. The sample intake pressure value, the sample exhaust pressure value, the current intake pressure value and the current exhaust pressure value can be obtained by measuring the air pressure value of the air cylinder in the actuating mechanism. Optionally, the position determination of 100% of the valve opening and 0% of the valve opening can be performed by controlling the IP module to exhaust, reading sensor data, waiting for data stabilization, and taking the data as a 0% position code value LowValue; and controlling the IP module to enter air, reading sensor data, waiting for data stabilization, and taking the data as a 100% position code value HighValue.
In some embodiments, the sample intake valve opening, the sample exhaust valve opening, the current intake valve opening, the current exhaust valve opening, the sample intake pressure value, the sample exhaust pressure value, the current intake pressure value, and the current exhaust pressure value may also be obtained by other collection devices external to the regulating valve, which is not limited herein.
Alternatively, the valve opening may be expressed as a ratio of the valve movement distance to the maximum movement distance of the valve. When the valve opening is 0%, i.e. the valve is closed, and when the valve opening is 100%, i.e. the valve is fully opened.
In some embodiments, the sample intake valve opening and sample intake pressure values are collected during the intake process of the regulator valve cylinder, and the sample exhaust valve opening and sample exhaust pressure values are collected during the exhaust process of the regulator valve cylinder, during the self-test of the regulator valve. Specifically, after the regulating valve is started, the regulating valve can perform self-checking, and the self-checking process includes, but is not limited to, detecting various parameters related to control, such as upper and lower limits of the valve, switching time, PWM control pulse width and the like.
For example, referring to fig. 3, fig. 3 is a schematic diagram of an intelligent valve positioner control, wherein a stroke sensor measures valve stroke, a pressure sensor 1 measures air source pressure, a pressure sensor 2 measures actuator in-cylinder pressure, and M is a pneumatic regulator valve. The IP module can be controlled to exhaust, the data of the travel sensor can be read, the data is waited for to be stable, and the data is used as a 0% position code value LowValue; and controlling the IP module to enter air, reading the data of the travel sensor, waiting for the data to be stable, and taking the data as a 100% position code value HighValue. Controlling the IP module to exhaust, reading data of the pressure sensor 2 as a sample exhaust pressure value, recording valve positions once every 0.5% as sample exhaust valve openings, and forming an exhaust process pressure curve, namely a standard exhaust curve, based on the sample exhaust pressure value and the sample exhaust valve openings; and controlling the IP module to perform air intake, reading data of the pressure sensor 2 as a sample air intake pressure value, and recording valve positions once every 0.5% as sample air intake valve opening to form an air intake process pressure curve, namely a standard air intake curve. In some embodiments, standard exhaust curve and standard intake curve data may be written to EEPROM.
The opening of each sample intake valve and the opening of each sample exhaust valve may be in an arithmetic progression, or may be randomly valued, and are not limited thereto.
In some embodiments, when the accuracy requirement is low, in order to shorten the self-checking time and save the CPU memory space, the intervals between the sample intake valve opening and the sample exhaust valve opening may be larger, for example, the valve openings at several positions of 0%, 25%, 50%, 75%, and 100% are taken as the sample intake valve opening and the sample exhaust valve opening, and the pressure values at the corresponding positions are obtained as the sample intake pressure values and the sample exhaust pressure values, and the standard intake curve and the standard exhaust curve are obtained through curve fitting. For example, less than 25% of the positions are fitted using data from three positions, 0%, 25% and 50%, and more than or equal to 25% and less than or equal to 75%, and more than 75% of the positions are fitted using data from three positions, 25%, 50% and 75%, and more than 75% of the positions are fitted using data from three positions, 50%, 75% and 100%.
The opening of each sample intake valve and the opening of each sample exhaust valve may be the same value, may be partially the same value, may be completely different, and are not limited herein.
In some embodiments, after the self-test is completed, the regulating valve enters an automatic control mode, i.e. an operating state, at which time a real-time control of the valve position can be achieved.
In some embodiments, before controlling the air intake of the regulating valve in the operating state of the regulating valve, the method further comprises:
and controlling the valve opening of the current valve to be 0%.
Optionally, in the working state of the regulating valve, controlling the valve opening of the current valve to be 0%, controlling the air inlet of the regulating valve, and obtaining a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings from the current air inlet valve opening to be 0%, and determining a current air inlet curve based on the current air inlet valve openings and the current air inlet pressure values.
In some embodiments, the current intake valve opening comprises 100%.
In some embodiments, after the control valve is controlled to complete air intake in the working state of the control valve, the control valve may be directly controlled to exhaust, so as to determine a current exhaust curve, that is, from the current exhaust valve opening being 100%, a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings are obtained, and the current exhaust curve is determined based on the current exhaust valve openings and the current exhaust pressure values.
In some embodiments, the determination of the current intake and exhaust curves may be continuous or discontinuous. For example, the valve opening may be controlled to 0% first, the regulator valve may be controlled to intake air, and the regulator valve may be controlled to exhaust air immediately after the current intake air curve is determined to determine the current exhaust air curve. For another example, after the current intake valve opening and the current intake pressure value required by the current intake curve are obtained, the regulating valve continues to work normally, after a period of time, the valve opening is controlled to 100%, the regulating valve is controlled to exhaust, and then the current exhaust valve opening and the current exhaust pressure value required by the current exhaust curve are obtained.
In some embodiments, the control regulator valve intake air or the sequence of intake air is not limited herein. That is, the order in which the current intake curve and the current exhaust curve are determined is not limited herein.
In some embodiments, in order to make the detection of the bite-card fault of the regulating valve more accurate, the opening of the sample air inlet valve and the opening of the current air inlet valve can be completely consistent, and the opening of the sample air outlet valve and the opening of the current air outlet valve are completely consistent, so that the fitting errors between the standard air inlet curve and the standard air outlet curve can be kept similar, and the fitting errors between the current air inlet curve and the current air outlet curve can be kept similar, thereby making the bite-card fault detection of the regulating valve more accurate.
In some embodiments, the regulator valve bite fault detection method further comprises at least one of:
controlling the air inlet of the regulating valve at intervals of a first preset time, acquiring a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
and controlling the regulating valve to exhaust at intervals of a second preset time, acquiring a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve.
Optionally, the first preset time is different from the second preset time, and when the air inlet of the regulating valve is controlled, if the second preset time is reached, the air inlet of the regulating valve is completed, and then the air outlet of the regulating valve is controlled.
In some embodiments, the setting of the flag may be performed at intervals of several days, for example, by means of internal timing of the CPU, where the valve opening of the control valve is 0%, and the resetting of the flag is performed. And controlling whether the valve opening of the valve is 0% or not and whether the regulating valve is controlled to exhaust according to the setting and resetting states of the execution mark, determining a current exhaust curve, controlling the air inlet of the regulating valve, and determining a current air inlet curve.
Optionally, if the execution flag is set, after the valve opening of the control valve is 0%, the control valve is controlled to exhaust, and referring to fig. 3, the control IP module is controlled to exhaust, the data of the pressure sensor 2 is read as the current exhaust pressure value, the valve position is recorded once every 0.5% as the current exhaust valve opening, and an exhaust process pressure curve, that is, the current exhaust curve, is formed based on the current exhaust pressure value and the current exhaust valve opening; and controlling the IP module to perform air intake, reading data of the pressure sensor 2 as a current air intake pressure value, and recording valve positions once every 0.5% as the current air intake valve opening to form an air intake process pressure curve, namely a current air intake curve. In some embodiments, current exhaust profile and current intake profile data may be written to EEPROM.
The current intake valve opening and the current exhaust valve opening may be in an arithmetic progression or may be randomly valued, and are not limited thereto.
In some embodiments, when the accuracy requirement is low, in order to shorten the self-checking time and save the CPU memory space, the intervals between the current intake valve opening and the current exhaust valve opening may be larger, for example, the valve opening of several positions of 0%, 25%, 50%, 75% and 100% is taken as the current intake valve opening and the current exhaust valve opening, the pressure value of the corresponding position is obtained as the current intake pressure value and the current exhaust pressure value, and the current intake curve and the current exhaust curve are obtained through curve fitting. For example, less than 25% of the positions are fitted using data from three positions, 0%, 25% and 50%, and more than or equal to 25% and less than or equal to 75%, and more than 75% of the positions are fitted using data from three positions, 25%, 50% and 75%, and more than 75% of the positions are fitted using data from three positions, 50%, 75% and 100%.
Note that, the current intake valve opening and the current exhaust valve opening may be the same values, may be partially the same values, or may be completely different, and are not limited herein.
In some embodiments, determining the regulator valve bite-card fault condition from at least one of the pair of intake curves and the pair of exhaust curves comprises:
acquiring a current air inlet error area, wherein the current air inlet error area is the area of a closed graph formed by enclosing a standard air inlet curve and a current air inlet curve by fitting the standard air inlet curve and the current air inlet curve to the same coordinate system;
acquiring a current exhaust error area, wherein the current exhaust error area is the area of a closed graph formed by enclosing a standard exhaust curve and a current exhaust curve by fitting the standard exhaust curve and the current exhaust curve to the same coordinate system;
and determining the bite fault state of the regulating valve according to at least one of the current air inlet error area and the current air outlet error area.
Optionally, referring to fig. 4, fig. 4 is a schematic diagram of fitting the standard air intake curve Q1 and the current air intake curve Q2 to the same coordinate system, where the area where S1 is located is the current air intake error area. The manner of the current intake error area may be determined in a related art manner, and is not limited herein.
Optionally, referring to fig. 5, fig. 5 is a schematic diagram of fitting the standard exhaust curve Q3 and the current exhaust curve Q4 to the same coordinate system, where the area where S2 is located is the current exhaust error area. The manner of the current exhaust error area may be determined in a related art manner, and is not limited herein.
In some embodiments, the regulator valve bite fault detection method further comprises at least one of:
if the bite fault state of the regulating valve is determined according to the current air inlet error area, determining that the current air inlet error area is larger than a first area threshold value, wherein the bite fault state of the regulating valve comprises the bite risk;
if the bite fault state of the regulating valve is determined according to the current exhaust error area, wherein the current exhaust error area is larger than a second area threshold value, the bite fault state of the regulating valve comprises the bite risk;
if the bite fault state of the regulating valve is determined according to the current air inlet error area and the current air outlet error area, the current air inlet error area is determined to be larger than a first area threshold value, the current air outlet error area is larger than a second area threshold value, and the bite fault state of the regulating valve comprises the bite risk.
Optionally, the first preset area threshold and the second preset area threshold may be set according to the needs of those skilled in the art, and the first preset area threshold and the second preset area threshold may be equal or unequal and are not limited herein.
Optionally, the first preset area threshold value and the second preset area threshold value may be fixed values, or may be values modified in the use process of the adjusting valve, which is not limited herein.
Optionally, if the regulation valve seizing fault state includes that there is a seizing risk, the regulation valve seizing fault detection method further includes at least one of the following:
if the bite fault state of the regulating valve is determined according to the current air inlet error area, determining that the current air inlet error area is larger than a third area threshold value, wherein the bite fault state of the regulating valve comprises the presence of a bite;
if the bite fault state of the regulating valve is determined according to the current exhaust error area, wherein the current exhaust error area is larger than a fourth area threshold value, and the bite fault state of the regulating valve comprises the presence of a bite;
if the bite fault state of the regulating valve is determined according to the current air inlet error area and the current air outlet error area, the current air inlet error area is determined to be larger than a third area threshold value, the current air outlet error area is larger than a fourth area threshold value, and the bite fault state of the regulating valve comprises the presence of a bite.
Similarly, the third preset area threshold and the fourth preset area threshold may be set according to the needs of those skilled in the art, and may be equal or unequal, which is not limited herein. The third and fourth preset area thresholds may be fixed values, or may be values modified during the use of the regulating valve, which are not limited herein. Optionally, the current valve clamping fault degree can be determined according to at least one of the current air inlet error area and the current air outlet error area, for example, a plurality of ranking ranges are respectively preset for the air inlet error area and the air outlet error area, each ranking range corresponds to the clamping degree, and the greater the area is, the heavier the clamping degree is. And determining the ranking of the vehicle according to the current air inlet error area and the current air outlet error area, and further determining the card biting degree.
Optionally, there is a risk of seizing including, but not limited to, the valve having a tendency to seize or to have a tendency to seize.
In some embodiments, the regulator valve bite fault detection method further comprises at least one of:
before determining a standard air inlet curve, performing sliding filtering treatment on the opening of a sample air inlet valve and a sample air inlet pressure value;
before determining a standard exhaust curve, performing sliding filtering treatment on the opening of a sample exhaust valve and the sample exhaust pressure value;
before determining a current air inlet curve, performing sliding filtering processing on the current air inlet valve opening and the current air inlet pressure value;
and before determining the current exhaust curve, performing sliding filtering processing on the current exhaust valve opening and the current exhaust pressure value.
Alternatively, the sliding filtering process may be a line 5-point sliding filtering, or may be a 3-point, 7-point, 9-point or other sliding filtering, which is not limited herein.
In some embodiments, if the regulator valve stuck fault condition includes a risk of stuck, the regulator valve stuck fault condition determination method further includes at least one of:
sending out an alarm message;
prompting to overhaul the regulating valve.
Optionally, the alarm message may be sent in at least one of a sound, an alarm indicator, and a mode of sending an alarm prompt to a preset terminal, so that a relevant worker knows that the regulating valve has information of the risk of the bite fault.
Service control valves include, but are not limited to, maintenance of the valve.
In some embodiments, the regulating valve bite card fault state determination method further comprises:
and acquiring a maintenance completion signal of the regulating valve, and carrying out self-inspection on the regulating valve again to determine a new standard air inlet curve and a new standard air outlet curve.
Optionally, the valve opening may be further calculated by obtaining the current valve movement distance, where the valve opening=the valve movement distance/the total distance of the movable valve, and it can be seen that, in principle, obtaining the valve movement distance and obtaining the valve opening can both implement the method for detecting the jam fault of the adjusting valve provided in this embodiment, which is not described herein again.
In some embodiments, the standard air intake curve is determined by the current valve opening and pressure value acquired when the regulating valve enters the working state after the self-checking of the regulating valve and the determination of the standard air intake curve are completed.
In some embodiments, the standard exhaust curve is determined by the current valve opening and pressure value acquired when the regulating valve enters the working state after the self-checking of the regulating valve and the determination of the standard exhaust curve are completed. In some embodiments, after the self-checking is started by the regulating valve, a plurality of sample intake valve openings and sample intake pressure values corresponding to the sample intake valve openings are collected, a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings are collected to respectively determine a standard intake curve and a standard exhaust curve, after the self-checking is finished, the regulating valve enters a working state, a plurality of current intake valve openings and current intake pressure values corresponding to the current intake valve openings are collected, a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings are collected to respectively determine a current intake curve and a current exhaust curve, and then a bite-card fault state of the regulating valve is determined according to at least one of an intake curve pair and an exhaust curve pair. After each maintenance of the regulating valve, new standard air inlet curve and standard air outlet curve are regenerated.
The embodiment of the invention provides a method for detecting the bite-card fault of a regulating valve, which comprises the steps of respectively determining a standard air inlet curve, a standard air outlet curve, a current air inlet curve and a current air outlet curve, and further determining the state of the regulating valve according to at least one of an air inlet curve pair and an air outlet curve pair, wherein the air inlet curve pair comprises the standard air inlet curve and the current air inlet curve, and the air outlet curve pair comprises the standard air outlet curve and the current air outlet curve, so that the bite-card fault state of the regulating valve can be detected through a machine, the detection accuracy is better, the timeliness of finding the bite-card fault condition of the regulating valve due to the reasons of filler abrasion and the like can be improved, the finding cost of the bite-card fault of the regulating valve is reduced, and the running safety of the regulating valve and the accuracy of valve control are improved.
Optionally, by sliding filtering data of at least one of the standard intake curve, the standard exhaust curve, the current intake curve, and the current exhaust curve, reliability of the corresponding curve may be improved.
Optionally, by determining the clamping fault state of the regulating valve according to at least one of the current air inlet error area and the current air outlet error area, the consistency of the standard for determining the clamping fault state of the regulating valve can be realized, and errors caused by human perception and other problems in manually determining the clamping fault state of the regulating valve are avoided.
Optionally, in time send alarm information can in time remind relevant staff governing valve to have unusually, simultaneously, the suggestion overhauls the governing valve, can realize in time reminding relevant technical staff to overhaul the governing valve, avoids governing valve "take sick" work, causes unnecessary loss.
The following describes an exemplary method for detecting a bite-card fault of a regulating valve according to this embodiment by using a specific embodiment, and referring to fig. 6, fig. 6 is a specific method for detecting a bite-card fault of a regulating valve, which includes:
s601: and controlling the self-checking of the regulating valve.
The regulating valve starts the self-checking flow.
S602: and controlling the regulating valve to exhaust, and obtaining the position information of the valve opening degree of 0%.
Taking the adjusting valve structure shown in fig. 3 as an example, the travel sensor data can be read by controlling the IP module to exhaust, and the data is stabilized and used as a valve opening degree of 0% position code value HighValue.
S603: and controlling the air inlet of the regulating valve to acquire the position information of 100% of the opening of the valve.
Taking the structure of the regulating valve shown in fig. 3 as an example, the data of the stroke sensor can be read by controlling the air inlet of the IP module, and the data is stabilized and used as a valve opening to be 100% of the position code value HighValue.
S604: and controlling the valve opening of the regulating valve to be 100%, exhausting the regulating valve, and recording the valve opening and the corresponding pressure value once every 0.5% of the valve opening as a sample exhaust valve opening and a sample exhaust pressure value.
Taking the structure of the regulating valve shown in fig. 3 as an example, the valve opening of the regulating valve is 100%, the IP module can be controlled to exhaust, and the data of the pressure sensor 2 can be read every 0.5% of the valve opening as a sample exhaust valve opening and a sample exhaust pressure value.
Alternatively, it is also possible to control the reading of data from the pressure sensor 2 every 1% or other data, as the sample exhaust valve opening and sample exhaust pressure values, and the specific interval values are not limited herein.
Alternatively, the data of the pressure sensor 2 may be read at random intervals as the sample exhaust valve opening and the sample exhaust pressure value.
Alternatively, this step is stopped when the valve opening is 0%.
S605: and arranging N points of sliding filtering treatment on the opening of the sample exhaust valve and the sample exhaust pressure value.
Alternatively, the specific sliding filtering method may be implemented by those skilled in the art using related art methods as needed, which is not limited herein.
S606: and determining a standard exhaust curve according to the opening degree of the sample exhaust valve and the sample exhaust pressure value after the N-point sliding filter treatment.
Alternatively, the recorded multiple sets of sample exhaust valve opening and sample exhaust pressure values may be fitted by a prior art manner to form a standard exhaust curve, where the standard exhaust curve includes data points for sample exhaust valve opening of 0% and 100%.
S607: and (3) regulating valve air intake, wherein the valve opening and the corresponding pressure value are recorded once every 0.5% of the valve opening as a sample air intake valve opening and a sample air intake pressure value.
Taking the regulating valve structure shown in fig. 3 as an example, after the execution of step S604 is completed, the valve opening is 0%, and the data of the pressure sensor 2 can be read as the sample intake valve opening and the sample intake pressure value by controlling the IP block to intake air at intervals of 0.5%.
Alternatively, the data of the pressure sensor 2 may be read at 1% intervals or other data, and the specific interval value is not limited herein, as the sample intake valve opening and the sample intake pressure value.
Alternatively, the data of the pressure sensor 2 may be read at random intervals as the sample intake valve opening and the sample intake pressure value.
Alternatively, this step is stopped when the valve opening is 100%.
S608: and carrying out N-point sliding filter processing on the opening of the sample air inlet valve and the sample air inlet pressure value.
Alternatively, the specific sliding filtering method may be implemented by those skilled in the art using related art methods as needed, which is not limited herein.
S609: and determining a standard air inlet curve according to the opening of the sample air inlet valve and the sample air inlet pressure value after the N-point sliding filter treatment.
Alternatively, the recorded multiple groups of sample intake valve opening degrees and sample intake pressure values can be fitted in a prior art manner to form a standard intake curve, where the standard intake curve includes data points with sample intake valve opening degrees of 0% and 100%.
Optionally, data constituting the standard intake curve and the standard exhaust curve may also be written to a charged erasable programmable read-Only Memory (EEPROM) as needed.
S610: the self-checking is carried out on the regulating valve continuously, the self-checking is completed, and the regulating valve is opened in a working state.
The intelligent valve positioner is self-checked after being installed on the regulating valve, and the purpose of the self-check is to detect various parameters related to control, such as upper and lower limits of the valve, switching time, PWM control pulse width and the like.
In the self-checking process, the valve is controlled to be fully opened and fully closed, and in the process, the CPU controls the pressure sensor 2 in the IP module to collect pressure data in the valve opening and closing processes, so as to form a standard air inlet curve and a standard air outlet curve. If the self-checking is not completed after the completion of the correlation curve is determined, continuing the self-checking until the self-checking is completed, and starting an automatic control mode, namely a working state, of the regulating valve.
S611: entering an automatic control mode, controlling the opening of the valve in real time, simultaneously, internally timing by a CPU, and executing setting of a mark at regular time intervals.
At this time, the regulating valve starts to enter a normal operation state.
The time interval may be set by those skilled in the art, is not limited herein, may be several days, etc.
And setting a flag to prompt that the valve opening of the regulating valve is required to be controlled to be 0%, and starting to acquire the current air inlet valve opening and the current air inlet pressure value.
S612: judging whether the mark is set, if so, executing step S613; if not, step S611 is performed.
S613, controlling the opening of the valve to be 0% and controlling the sign to reset; and controlling the regulating valve to charge air, and recording the valve opening and the corresponding pressure value once every 0.5% of the valve opening as the current inlet valve opening and the current inlet pressure value.
Taking the regulating valve structure shown in fig. 3 as an example, after the execution of step S611 is completed, the valve opening is 0%, and the data of the pressure sensor 2 can be read as the current intake valve opening and the current intake pressure value by controlling the IP block to intake air at intervals of 0.5%.
Alternatively, it is also possible to control to read the data of the pressure sensor 2 every 1% or other data as the current intake valve opening and the current intake pressure value, and the specific interval value is not limited herein.
Alternatively, the data of the pressure sensor 2 may be read at random intervals as the current intake valve opening and the current intake pressure value.
Alternatively, this step is stopped when the valve opening is 100%.
S614: and carrying out N-point sliding filter processing on the current opening of the air inlet valve and the current air inlet pressure value.
Alternatively, the specific sliding filtering method may be implemented by those skilled in the art using related art methods as needed, which is not limited herein.
S615: and determining a current air inlet curve according to the current air inlet valve opening and the current air inlet pressure value after the N-point sliding filtering treatment.
Alternatively, the recorded multiple groups of current intake valve opening degrees and current intake pressure values can be fitted to form a current intake curve in a prior art manner, wherein the current intake curve comprises data points with 0% and 100% of the current intake valve opening degrees.
Optionally, the data that make up the current intake profile and the current exhaust profile can also be written to a charged erasable programmable read-Only Memory (EEPROM) as needed.
S616: and controlling the regulating valve to exhaust, and recording the valve opening and the corresponding pressure value once every 0.5% of the valve opening as the current exhaust valve opening and the current exhaust pressure value.
Taking the regulating valve structure shown in fig. 3 as an example, after the execution of step S613 is completed, the valve opening is 100%, and the data of the pressure sensor 2 can be read as the current exhaust valve opening and the current exhaust pressure value by controlling the IP block to exhaust, with the valve opening being 0.5% each time.
Alternatively, it is also possible to control the reading of data from the pressure sensor 2 every 1% or other data as the current exhaust valve opening and the current exhaust pressure value, and the specific interval value is not limited herein.
Alternatively, the data of the pressure sensor 2 may be read at random intervals as the current exhaust valve opening and the current exhaust pressure value.
Alternatively, this step is stopped when the valve opening is 0%.
S617: and arranging N points of sliding filtering treatment for the opening of the current exhaust valve and the current exhaust pressure value.
Alternatively, the specific sliding filtering method may be implemented by those skilled in the art using related art methods as needed, which is not limited herein.
S618: and determining a current exhaust curve according to the current exhaust valve opening and the current exhaust pressure value after the N-point sliding filtering treatment.
Alternatively, the recorded multiple sets of current exhaust valve opening and current exhaust pressure values may be fitted by a prior art manner to form a current exhaust curve, where the current exhaust curve includes data points for which the current exhaust valve opening is 0% and 100%.
Optionally, the data that make up the current exhaust profile and the current exhaust profile can also be written to a charged erasable programmable read-Only Memory (EEPROM) as needed.
S619: and determining the current air inlet error area and the current air outlet error area.
Optionally, the current air intake error area is the area of a closed graph formed by fitting a standard air intake curve and a current air intake curve to the same coordinate system.
Optionally, the current exhaust error area is the area of a closed figure formed by fitting the standard exhaust curve and the current exhaust curve to the same coordinate system.
S620: whether the current intake error area is greater than a first preset threshold value or not is determined, whether the current exhaust error area is greater than a second preset threshold value or not is determined, if yes, step S620 is executed, and if no, step S611 is executed.
S621: the regulator valve bite fault condition includes a bite risk.
The first area threshold value and the second area threshold value can use default fixed values or can be modified.
Due to the abrasion of the filler in the regulating valve and other reasons, the clamping fault of the regulating valve can be caused to influence the opening degree of the valve, and when the clamping fault state of the regulating valve comprises the clamping risk, the occurrence of the clamping fault of the valve or the trend of the clamping fault of the valve is indicated.
S622: and alarming and prompting a user to maintain the regulating valve.
S623: whether maintenance is completed is determined, and if so, step S601 is executed.
Optionally, the determination of whether maintenance is completed may be determined by determining whether a regulating valve overhaul completion signal is obtained. If the adjustment valve maintenance completion signal has not been received at present, the step S623 is repeated at intervals.
By the aid of the method for detecting the bite-clamping fault of the regulating valve, diagnosis of the bite-clamping fault of the valve by means of a machine can be achieved on the basis that original functions of a product are not changed, and an alarm is given and a user is prompted to maintain the valve.
Example two
Referring to fig. 7, an embodiment of the present invention further provides a valve positioner 700, including:
the standard air inlet curve determining module 701 is configured to obtain a plurality of sample air inlet valve openings and sample air inlet pressure values corresponding to the sample air inlet valve openings, determine a standard air inlet curve, and collect air inlet process of a regulating valve cylinder when the sample air inlet valve openings and the sample air inlet pressure values are self-detected at the regulating valve;
the standard exhaust curve determining module 702 is configured to obtain a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings, determine a standard exhaust curve, and collect an exhaust process of a cylinder of the regulating valve, where the sample exhaust valve openings and the sample exhaust pressure values are self-detected at the regulating valve;
The current air inlet curve determining module 703 is configured to control the air inlet of the regulating valve in the working state of the regulating valve, obtain a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determine a current air inlet curve;
the current exhaust curve determining module 704 is configured to control the regulating valve to exhaust in a working state of the regulating valve, obtain a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determine a current exhaust curve;
the adjusting valve bite fault state determining module 705 is configured to determine the adjusting valve bite fault state according to an intake curve pair or an exhaust curve pair, where the intake curve pair includes a standard intake curve and a current intake curve, and the exhaust curve pair includes a standard exhaust curve and a current exhaust curve.
In this embodiment, the valve positioner is substantially provided with a plurality of modules for executing the method for detecting the bite-blocking fault of the adjusting valve according to the first embodiment, and specific functions and technical effects thereof will be described with reference to the first embodiment and will not be repeated herein.
Referring to fig. 8, an embodiment of the present invention also provides a terminal 800 including a processor 801, a memory 802, and a communication bus 803;
A communication bus 803 is used to connect the processor 801 and memory connection 802;
the processor 801 is configured to execute a computer program stored in the memory 802 to implement the regulating valve bite fault detection method according to any one of the above embodiments.
The embodiment of the present application further provides a non-volatile readable storage medium, where one or more modules (programs) are stored, where the one or more modules are applied to a device, and the device may be caused to execute instructions (instructions) of a step included in the embodiment one of the embodiment of the present application.
An embodiment of the present invention further provides a computer-readable storage medium, which is characterized in that a computer program is stored thereon, where the computer program is configured to cause a computer to execute the method for detecting a bite-card failure of a regulating valve according to any one of the above embodiments.
It should be noted that the computer readable medium described in the present disclosure may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.
The computer readable medium may be contained in the electronic device; or may exist alone without being incorporated into the electronic device.
Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (7)
1. The method for detecting the bite card fault of the regulating valve is characterized by comprising the following steps of:
acquiring a plurality of sample air inlet valve openings and sample air inlet pressure values corresponding to the sample air inlet valve openings, determining a standard air inlet curve, wherein the sample air inlet valve openings and the sample air inlet pressure values are self-inspected at a regulating valve, and collecting air in an air inlet process of a regulating valve cylinder;
acquiring a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings, determining a standard exhaust curve, wherein the sample exhaust valve openings and the sample exhaust pressure values are self-inspected at the regulating valve, and collecting the cylinder exhaust process of the regulating valve;
controlling the air inlet of the regulating valve under the working state of the regulating valve, acquiring a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
Controlling the regulating valve to exhaust under the working state of the regulating valve, obtaining a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve;
determining a bite-clamping fault state of the regulating valve according to at least one of an air inlet curve pair and an air outlet curve pair, wherein the air inlet curve pair comprises the standard air inlet curve and the current air inlet curve, and the air outlet curve pair comprises the standard air outlet curve and the current air outlet curve;
wherein the determining of the regulating valve bite-card fault state according to at least one of the air inlet curve pair and the air outlet curve pair comprises,
acquiring a current air inlet error area, wherein the current air inlet error area is the area of a closed graph formed by enclosing the standard air inlet curve and the current air inlet curve by fitting the standard air inlet curve and the current air inlet curve to the same coordinate system;
acquiring a current exhaust error area, wherein the current exhaust error area is the area of a closed graph formed by enclosing the standard exhaust curve and the current exhaust curve by fitting the standard exhaust curve and the current exhaust curve to the same coordinate system;
Determining a regulating valve stuck fault state according to at least one of the current air inlet error area and the current air outlet error area;
determining the ranking according to the current air inlet error area and the current air outlet error area, and further determining the clamping degree, wherein a plurality of ranking ranges are preset for the air inlet error area and the air outlet error area respectively, and each ranking range corresponds to different clamping degrees;
if the regulating valve seizing fault state comprises the risk of seizing, the regulating valve seizing fault detection method further comprises at least one of the following steps: sending out an alarm message and prompting to overhaul the regulating valve;
and acquiring a maintenance completion signal of the regulating valve, and carrying out self-inspection on the regulating valve again to determine a new standard air inlet curve and a new standard air outlet curve.
2. The method of claim 1, further comprising at least one of:
if the regulating valve clamping fault state is determined according to the current air inlet error area, determining that the current air inlet error area is larger than a first area threshold, wherein the regulating valve clamping fault state comprises clamping risk;
if the regulating valve clamping fault state is determined according to the current exhaust error area, wherein the current exhaust error area is larger than a second area threshold value, and the regulating valve clamping fault state comprises clamping risks;
If the regulating valve clamping fault state is determined according to the current air inlet error area and the current air outlet error area, the current air inlet error area is determined to be larger than the first area threshold value, the current air outlet error area is larger than the second area threshold value, and the regulating valve clamping fault state comprises clamping risks.
3. The method of claim 1, further comprising at least one of:
controlling the air inlet of the regulating valve at intervals of a first preset time, acquiring a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
and controlling the regulating valve to exhaust at intervals of a second preset time, acquiring a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve.
4. A method of detecting a stuck fault in a regulator valve according to any one of claims 1 to 3, further comprising at least one of:
before a standard air inlet curve is determined, sliding filtering processing is carried out on the opening of the sample air inlet valve and the sample air inlet pressure value;
Before determining a standard exhaust curve, performing sliding filtering processing on the opening of the sample exhaust valve and the sample exhaust pressure value;
before determining a current air inlet curve, performing sliding filtering processing on the current air inlet valve opening and the current air inlet pressure value;
and before determining a current exhaust curve, performing sliding filtering processing on the current exhaust valve opening and the current exhaust pressure value.
5. A valve positioner, comprising:
the standard air inlet curve determining module is used for obtaining a plurality of sample air inlet valve openings and sample air inlet pressure values corresponding to the sample air inlet valve openings, determining a standard air inlet curve, wherein the sample air inlet valve openings and the sample air inlet pressure values are self-inspected at a regulating valve, collecting an air inlet process of a cylinder of the regulating valve, obtaining a maintenance completion signal of the regulating valve, carrying out self-inspection on the regulating valve again, and determining a new standard air inlet curve;
the standard exhaust curve determining module is used for obtaining a plurality of sample exhaust valve openings and sample exhaust pressure values corresponding to the sample exhaust valve openings, determining a standard exhaust curve, wherein the sample exhaust valve openings and the sample exhaust pressure values are self-inspected at the regulating valve, collecting an exhaust process of a cylinder of the regulating valve, obtaining a maintenance completion signal of the regulating valve, carrying out self-inspection on the regulating valve again, and determining a new standard exhaust curve;
The current air inlet curve determining module is used for controlling the air inlet of the regulating valve under the working state of the regulating valve, obtaining a plurality of current air inlet valve openings and current air inlet pressure values corresponding to the current air inlet valve openings, and determining a current air inlet curve;
the current exhaust curve determining module is used for controlling the regulating valve to exhaust under the working state of the regulating valve, obtaining a plurality of current exhaust valve openings and current exhaust pressure values corresponding to the current exhaust valve openings, and determining a current exhaust curve;
the regulating valve clamping fault state determining module is used for determining the regulating valve clamping fault state according to at least one of an air inlet curve pair and an air outlet curve pair, wherein the air inlet curve pair comprises the standard air inlet curve and the current air inlet curve, and the air outlet curve pair comprises the standard air outlet curve and the current air outlet curve;
wherein the determining of the regulating valve bite-card fault state according to at least one of the air inlet curve pair and the air outlet curve pair comprises,
acquiring a current air inlet error area, wherein the current air inlet error area is the area of a closed graph formed by enclosing the standard air inlet curve and the current air inlet curve by fitting the standard air inlet curve and the current air inlet curve to the same coordinate system;
Acquiring a current exhaust error area, wherein the current exhaust error area is the area of a closed graph formed by enclosing the standard exhaust curve and the current exhaust curve by fitting the standard exhaust curve and the current exhaust curve to the same coordinate system;
determining a regulating valve stuck fault state according to at least one of the current air inlet error area and the current air outlet error area;
determining the ranking according to the current air inlet error area and the current air outlet error area, and further determining the clamping degree, wherein a plurality of ranking ranges are preset for the air inlet error area and the air outlet error area respectively, and each ranking range corresponds to different clamping degrees;
if the regulator valve bite fault condition includes a bite risk, the valve positioner is further configured to at least one of: and sending out an alarm message and prompting to overhaul the regulating valve.
6. A terminal comprising a processor, a memory and a communication bus;
the communication bus is used for connecting the processor and the memory;
the processor is configured to execute a computer program stored in the memory to implement the regulating valve bite fault detection method according to any one of claims 1 to 4.
7. A computer-readable storage medium, having stored thereon a computer program for causing the computer to execute the regulating valve bite-card failure detection method according to any one of claims 1 to 4.
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| CN114166501B (en) * | 2021-11-30 | 2024-04-02 | 重庆川仪自动化股份有限公司 | Partial stroke testing device and method for intelligent valve positioner |
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| CN107655669B (en) * | 2017-09-19 | 2019-08-23 | 中广核核电运营有限公司 | Pneumatic control valve mechanical performance detection device and its detection method |
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