CN115479155B

CN115479155B - A pressure release device online monitoring system and method

Info

Publication number: CN115479155B
Application number: CN202211248204.8A
Authority: CN
Inventors: 杨�嘉; 卫秀峰
Original assignee: Changzhou Xiao'an Shuzhi Technology Co ltd
Current assignee: Changzhou Xiao'an Shuzhi Technology Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2024-11-12
Anticipated expiration: 2042-10-12
Also published as: CN115479155A

Abstract

The present application discloses an online monitoring system and method for a pressure release device, the monitoring system comprising: a pressure release device, at least one acceleration sensor and a data processing system, wherein the at least one acceleration sensor is directly or indirectly rigidly connected to the pressure release device; the at least one acceleration sensor is used to collect vibration parameters of the pressure release device; the data processing system is used to obtain the vibration parameters and determine the state of the pressure release device based on the vibration parameters. The detection system and method can accurately infer the state of the pressure release device in actual operation, and can achieve the effect of online monitoring of the state of the pressure release device without affecting the normal operation of the pressure vessel and its pipeline, so as to timely discover whether the pressure release device has an abnormality (such as jumping, etc.) or whether there is a leak, so as to avoid unnecessary waste of medium and avoid causing safety accidents.

Description

Online monitoring system and method for pressure release device

Technical Field

The application relates to the technical field of electronics, in particular to an online monitoring system and method for a pressure release device.

Background

The pressure relief device (e.g., a relief valve) is an overpressure protection apparatus for a pressure vessel. When the pressure of the medium in the pressure container is in a normal range, the opening and closing piece of the pressure release device is in a normally closed state; when the pressure of the medium in the pressure container rises and exceeds a specified value, the opening and closing piece of the pressure release device is opened to discharge the medium in the pressure container outwards so as to reduce the pressure of the medium in the pressure container, thereby achieving the purpose of protecting the pressure container.

The pressure release device is widely applied in the chemical industry. According to the management requirements of the pressure container in the related standards, a pressure release device conforming to the design pressure or the maximum operating pressure of the pressure container needs to be installed between the pressure container and the external environment to serve as a mechanical release protection layer of the pressure container. In this application scenario, the pressure relief device is the last protective layer that prevents an explosion or other safety accident caused by too high pressure of the medium in the pressure vessel. Therefore, it is important to monitor the state of the pressure release device to find out whether the pressure release device is abnormal or not and whether leakage exists or not in time, for example, to find out that the conditions can reduce the occurrence of accidents in time, and meanwhile, the problems of medium loss, environmental pollution and the like caused by leakage can be avoided. If the pressure release device has leakage, the protection function of the pressure release device is influenced, and the pressure release device can be recovered to be used after being overhauled as soon as possible. However, in the actual working environment, such as noisy environmental noise of a chemical plant, complex working conditions, huge number of pressure relief devices, lack of technical means and the like, it is difficult to find the abnormal conditions or leakage conditions in real time.

Currently, on the one hand, the pressure relief device is tested for its tightness before shipment, and on the other hand, it is tested for its tightness and functional integrity by periodic inspection (e.g., annual inspection). However, such detection requirements and methods cannot detect in real time (in time) whether the pressure release device is abnormal or has a leakage condition during the actual working process (actual use process).

Disclosure of Invention

The embodiment of the application provides an online monitoring system and an online monitoring method for a pressure release device, which are used for accurately monitoring the state of the pressure release device in actual work in real time.

In a first aspect, an embodiment of the present application provides an online monitoring system for a pressure release device, including:

a pressure release device, at least one acceleration sensor and a data processing system, wherein the at least one acceleration sensor is directly or indirectly rigidly connected to the pressure release device;

the at least one acceleration sensor is used for collecting vibration parameters of the pressure release device;

The data processing system is used for acquiring the vibration parameters and determining the state of the pressure release device based on the vibration parameters.

In a second aspect, an embodiment of the present application further provides an online monitoring method for a pressure release device, including:

Collecting vibration parameters of the pressure release device by using at least one acceleration sensor, wherein the at least one acceleration sensor is directly or indirectly rigidly connected with the pressure release device;

Acquiring the vibration parameters by using a data processing system;

Determining, with the data processing system, a state of the pressure relief device based on the vibration parameter.

According to the at least one technical scheme adopted by the embodiment of the application, the vibration parameters of the pressure release device are acquired through the at least one acceleration sensor, and the state of the pressure release device is determined based on the vibration parameters of the pressure release device. When the pressure of the medium in the pressure container exceeds a specified value, the opening and closing part in the pressure release device arranged on the pressure container acts to release the pressure in the pressure container, and the opening and closing part in the pressure release device can vibrate itself or a rigid connecting part thereof when acting, and the vibration caused by the action of the opening and closing part of the pressure release device is different from other vibrations, so that the state of the pressure release device in actual working can be accurately and reversely pushed out through the collected vibration parameters of the pressure release device, thereby timely finding whether the pressure release device is abnormal or has medium leakage or not, reducing the occurrence of accidents, and avoiding the problems of unnecessary medium waste, environmental pollution and the like. In addition, the vibration sensor is installed in a non-invasive mode, so that the scheme can achieve the effect of monitoring the state of the pressure release device on line in real time without affecting the normal operation of the pressure container and the pipeline thereof.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a schematic structural diagram of an online monitoring system for a pressure release device according to an embodiment of the present application.

Fig. 2 is a schematic diagram showing a detailed structure of an online monitoring system for a pressure release device according to an embodiment of the present application.

Fig. 3 is a schematic diagram showing another detailed structure of an online monitoring system for a pressure release device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of an online monitoring system for a pressure release device according to another embodiment of the present application.

Fig. 5 is a schematic structural diagram of an online monitoring system for a pressure release device according to another embodiment of the present application.

Fig. 6 is a flow chart of an online monitoring method of a pressure release device according to an embodiment of the application.

Fig. 7 is a detailed flowchart of an online monitoring method of a pressure release device according to an embodiment of the application.

Fig. 8 is a flowchart of an online monitoring method of a pressure release device according to another embodiment of the present application.

Fig. 9 is a flowchart of a method for on-line monitoring a pressure release device according to another embodiment of the present application.

Fig. 10 is a flowchart of a method for on-line monitoring a pressure release device according to another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In order to accurately monitor the state of the pressure release device in actual operation, the embodiment of the application provides an online monitoring system and an online monitoring method of the pressure release device.

It should be noted that the system and the method for on-line monitoring of the pressure release device provided by the embodiment of the application can be applied to various scenes, such as a power plant, a chemical plant, an upstream exploitation place of the chemical plant, and the like, wherein the chemical plant can be a refinery, and the like. In the following, an oil refinery is mainly taken as an example to describe a system and a method for on-line monitoring of a pressure release device according to an embodiment of the present application, and it should be understood that this example does not limit the application scenario of the system and the method for on-line monitoring of a pressure release device according to an embodiment of the present application.

It is also to be appreciated that at least one embodiment of the present application is hereinafter described in terms of a pressure relief device employed in a refinery. However, those skilled in the art will appreciate that the present application is equally applicable to any industrial setting in which a pressure relief device may be employed. Industrial facilities that employ pressure relief devices and that require monitoring of such devices may include, but are not limited to, power generation equipment, petroleum, chemical facilities, steel facilities, and electrical facilities. Those skilled in the art will also recognize that the teachings herein are applicable to other applications, such as military, commercial, and residential applications, in addition to industrial devices.

Firstly, an online monitoring system of a pressure release device provided by the embodiment of the application is described.

As shown in fig. 1, an on-line monitoring system for a pressure release device according to an embodiment of the present application may include: the pressure release device 11, the acceleration sensor 12 and the data processing system 13, wherein the acceleration sensor 12 is directly or indirectly rigidly connected with the pressure release device 11, and the acceleration sensor 12 and the data processing system 13 are electrically connected.

In the embodiment of the present application, an acceleration sensor 12 is used for collecting vibration parameters of the pressure release device 11; the data processing system 13 is configured to obtain the vibration parameter and determine the state of the pressure release device based on the vibration parameter.

In a typical refinery, there may be hundreds or even thousands of pressure relief devices in use, but for ease of illustration, fig. 1 shows only one pressure relief device 11 and only one acceleration sensor 12. It will be understood by those skilled in the art that the number of the acceleration sensors 12 for detecting the pressure relief device 11 may be greater than that shown in fig. 1, that is, in an on-line monitoring system for a pressure relief device provided in an embodiment of the present application, the number of the acceleration sensors 12 may be 1 or more.

In the embodiment of the present application, the vibration parameter of the pressure release device 11 refers to the acceleration sensed and collected by the acceleration sensor 12, which is caused by the vibration when the opening and closing member in the pressure release device 11 acts.

Optionally, in order to more accurately and timely sense the vibration caused by the action of the opening and closing member in the pressure release device 11 and measure the vibration parameter of the pressure release device 11, as shown in fig. 1, the acceleration sensor 12 is installed near the pressure release device 11, but is not limited to a specific position near the pressure release device 11. The "vicinity", i.e. the distance is relatively close, typically less than a preset distance, e.g. less than 20cm, which is influenced by the size of the pressure relief device 11 itself, which preset distance may be relatively large when the size of the pressure relief device 11 itself is large, and which preset distance may be relatively small when the size of the pressure relief device 11 itself is small.

It will be appreciated that when the number of acceleration sensors 12 is plural, the plural acceleration sensors 12 may be installed at different positions in the vicinity of the pressure release device 11, respectively, to acquire vibration parameters of the pressure release device 11 from the different positions.

Specifically, the acceleration sensor 12 may be mounted on the body of the pressure release device 11, or the acceleration sensor 12 may be mounted on a member rigidly connected to the pressure release device 11. When the acceleration sensor 12 is mounted on a member rigidly connected to the pressure release device 11, it may be mounted on, in particular but not limited to, one of the following:

(1) A support structure for the pressure relief device 11, such as a flange 111 at the inlet of the pressure relief device 11;

(2) A first conduit 14 extending from an inlet 112 of the pressure relief device 11;

(3) A second conduit 15 extending from the outlet 113 of the pressure relief device 11.

It should be further noted that, in the embodiment of the present application, the acceleration sensor 12 is rigidly connected to the pressure release device 11 directly or indirectly in a non-invasive manner, the installation of the acceleration sensor 12 does not change the fact that the pressure release device 11 and the pressure vessel and the pipeline protected by the pressure release device 11 are closed, or the acceleration sensor 12 is installed outside the pressure release device 11 and the pressure vessel and the pipeline protected by the pressure release device 11, and the installation of the acceleration sensor 12 does not have any influence on the internal environment of the pressure release device 11 and the pressure vessel and the pipeline protected by the pressure release device. The latter ultrasonic sensors and temperature sensors are also mounted in a non-invasive manner. The non-invasive installation mode can achieve the effect of monitoring the state of the pressure release device 11 on line in real time without affecting the normal operation of the pressure container and the pipeline thereof, greatly reduces the installation time and other costs, and also greatly reduces the safety risks and the like attached in the installation process.

Further, as shown in fig. 1, the inlet of the pressure relief device 11 is connected to the pressure vessel 10 via a first pipe 14, and the outlet of the pressure relief device 11 is connected to the external environment via a second pipe 15 to form a mechanical protection layer for the pressure vessel 10. It should be noted that the external environment herein is with respect to the internal environment of the pressure vessel 10, and in some applications, the external environment may be a natural environment, and in other applications, the external environment may be another vessel or processing device (e.g., a torch). In the case of a refinery, the medium in the pressure vessel may be various gases or liquids generated during the refinery process.

In the embodiment of the present application, the pressure release device 11 is an automatic pressure release device, and specifically may be any one of a safety valve, a pressure release valve, a pressure reducing valve, an exhaust valve, a pressure relief valve, a pressure regulating valve, a pressure stabilizing valve, a pressure reducer, a pressure safety valve, an explosion-proof valve, a control valve, a burst disk, and the like, which has an automatic pressure release function, so long as the pressure container can be protected.

In the embodiment of the present application, the state of the pressure release device 11 may include one of a normal state, an abnormal state, and a leakage state. Wherein the abnormal state may include at least one designated state and a concomitant release of medium in the designated state, the at least one designated state including one or more of a pre-leak, a take-off, a seat return and a flutter, it being understood that the pressure release device, once there is a release or leak of medium, indicates that its protective function has been compromised, cannot continue to operate, and requires maintenance or replacement; the leakage condition may include an internal leak, which is relatively speaking, a leakage condition in which the leaked medium leaks from an upstream conduit of the pressure relief device into a downstream conduit, and/or a micro-leak (see below).

As an example, the acceleration sensor 12 may be specifically configured to collect the vibration parameter of the pressure release device 11 at a preset frequency, and upload the collected vibration parameter of the pressure release device 11 to the data processing system 13 in real time. Accordingly, the data processing system 13 may time stamp the received vibration parameter and store the vibration parameter and the time stamp in correspondence.

It should be noted that, when the pressure of the medium in the pressure vessel 10 exceeds the predetermined value, the state of the pressure release device may change rapidly, so if the vibration caused by the action of the opening and closing member in the pressure release device 11 is to be captured accurately and timely, the vibration parameter of the pressure release device 11 needs to be continuously collected at a relatively high frequency, and thus the above-mentioned preset frequency is generally higher than a preset frequency, which may be set empirically.

Among them, there are various ways in which the data processing system 13 determines the state of the pressure release device 11 based on the obtained vibration parameter of the pressure release device 11, and two ways are described below.

First mode

The data processing system 13 is particularly useful for: judging whether vibration parameters of a plurality of moments including the current moment are all larger than or equal to a preset threshold value or not; if yes, determining that the pressure release device 11 is in an abnormal state; if not, it is determined that the pressure release device 11 is in a normal state.

The plurality of time instants may include a current time instant and a plurality of historical time instants adjacent to the current time instant, and a time interval between two adjacent time instants in the plurality of time instants is smaller than a preset time interval (for example, x is x seconds, x is greater than 0), for example, the preset time interval may be equal to a sampling period, and for a specific example, assuming that the sampling period is 1s, the current time instant is 12:01:06, the 5 time instants of 12:01:02, 12:01:03, 12:01:04, 12:01:05, and 12:01:06 may be selected as the plurality of time instants.

Wherein the abnormal state is a state in which the opening and closing member of the pressure release device 11 is closed and not operated, relative to the normal state in which the medium pressure in the pressure vessel is less than a prescribed value; the abnormal state refers to a state when or after the opening and closing member of the pressure release device 11 is operated, and at this time, the pressure of the medium in the pressure vessel may exceed a predetermined value, specifically, the predetermined value may be one of the set pressure, the maximum operating pressure, and the design pressure of the pressure release device, and the abnormal state includes at least one specified state and a medium release accompanying the specified state, and the at least one specified state includes one or more of a forward leak, a jump, a return seat, and a chatter.

Wherein the preset threshold is determined according to the trend of the vibration parameter of the pressure release device 11 in the process that the pressure release device 11 changes from the normal state to the abnormal state. For example, the preset threshold may be greater than 0m/s ².

It is apparent that whether the pressure release device 11 is in an abnormal state can be accurately determined by the above-described first mode. Optionally, if in an abnormal state, the alarm information may be further generated.

Second mode

The data processing system 13 is particularly useful for:

Judging whether the vibration parameter of the target moment is larger than or equal to a preset threshold value;

Determining a first waveform of the vibration parameter of the pressure release device over time in a first period of time and determining a second waveform of the vibration parameter of the pressure release device over time in a second period of time, where the first period of time is a period of time (e.g., y is greater than 0 in y seconds) before and adjacent to the target time, and the second period of time is a period of time (e.g., z is greater than 0) after and adjacent to the target time, where the vibration parameter of the pressure release device over time is greater than or equal to a preset threshold;

determining whether the first waveform meets a first preset condition;

Determining whether the second waveform meets a second preset condition or not under the condition that the first waveform meets the first preset condition;

and determining an abnormal state of the pressure release device and an occurrence time of the abnormal state based on the first waveform and the second waveform, if the second waveform meets the second preset condition.

Also, the preset threshold is determined according to a trend of variation of the vibration parameter of the pressure release device 11 during the process of changing the pressure release device 11 from the normal state to the abnormal state. For the definition of the normal state and the abnormal state, reference is made to the description of the first mode, and the description is not repeated here.

The target time may be any time, and is generally the current time.

Wherein the first preset condition includes: matching a first preset waveform, wherein the first preset waveform is a waveform of a vibration parameter of the pressure release device 11 in a pre-determined forward-leakage state changing with time; the second preset condition includes: matching a second preset waveform, which is a waveform of a vibration parameter of the pressure release device 11 in a predetermined take-off state that varies with time.

It should be emphasized that in the second mode, it seems that the state of the pressure release device can be easily determined by simple comparison of waveforms, but it is not easy to obtain the first preset waveform and the second preset waveform in the second mode. Those skilled in the art will appreciate that in addition to vibrations caused by the tripping of the opening and closing member in the pressure relief device 11, other vibrations are often present on the pressure relief device 11 and the pipe to which it is connected, such as at least one of the following:

(1) Vibration caused by the air column;

(2) Vibration caused by rotation of other devices;

(3) Vibration caused by pipe flow pulsation;

(4) Vibration caused by two-phase flow;

(5) Vibration caused by water hammer;

(6) Turbulence induced vibration.

Therefore, when the vibration caused by the jump of the opening and closing member in the pressure release device 11 is collected, other vibrations may be collected at the same time, and these other vibrations may interfere with the determination of the vibration parameter of the pressure release device 11, thereby resulting in an inaccurate state of the pressure release device 11 determined based on the vibration parameter of the pressure release device 11.

In order to avoid the above problems, the applicant has determined, through a great deal of experiments and researches for a long period of time, a standard waveform (i.e., a first preset waveform) of the pressure release device 11 in a forward leakage state and a standard waveform (i.e., a second preset waveform) of the pressure release device in a take-off state, and skillfully eliminates interference caused by other vibrations by comparing the acquired waveform with at least one of the first preset waveform and the second preset waveform, thereby accurately determining the state of the pressure release device 11. Further, along these lines, those skilled in the art can determine standard waveforms in other conditions (e.g., recoil, vibration, etc.), and thus accurately determine other conditions of the pressure relief device 11 by comparing the acquired waveforms to those standard waveforms.

It should also be emphasized that, through extensive experimentation and research by the applicant, the pressure relief device 11 will experience a premature release (i.e. a waveform of relatively small amplitude will be generated before the release) and the pressure relief device 11 will immediately follow the gas impact to instantaneously bear against the opening and closing member, and the vibration damping rate at this impact stage will be significantly slow compared to the vibration damping rate of other vibrations (such as metal impact, which is typically exponentially damped). Based on this finding, the applicant determines, through repeated experiments, a standard waveform of the pressure release device 11 in the forward-venting state as the first preset waveform, a standard waveform of the pressure release device 11 in the take-off state as the second preset waveform, and in the second embodiment, determines whether the pressure release device 11 is in the forward-venting state by comparing the first waveform in the first period with the first preset waveform; if so, further comparing the second waveform in the second period with the second preset waveform to determine whether the pressure release device 11 takes place to jump, then combining the change trend of the first waveform and the first preset waveform to determine the time when the pressure release device 11 takes place to leak, combining the change trend of the second waveform and the second preset waveform to determine the time when the pressure release device 11 takes place to jump, seat returning and flutter, and so on.

It can be seen that, by the waveform comparison method provided by the embodiment of the present application, on one hand, interference caused by other vibrations can be eliminated, and various states of the pressure release device 11 can be accurately determined; on the other hand, the occurrence time of various states of the pressure release device 11 can be accurately determined by combining the change trend of the waveform, so that whether the state of the pressure release device 11 is abnormal or not can be timely found, and further the fine management of the pressure release device 11 is realized.

Optionally, on the basis of the second embodiment described above, the data processing system 13 may be further configured to: and continuously receiving the vibration parameter uploaded by the at least one acceleration sensor under the condition that the vibration parameter at the target moment is smaller than or equal to a preset threshold value, stamping a time stamp on the received vibration parameter and correspondingly storing the received vibration parameter, continuously judging whether the vibration parameter at the target moment is larger than or equal to the preset threshold value, and timely finding whether the state of the pressure release device 11 is abnormal.

Optionally, on the basis of the second embodiment described above, the data processing system 13 may be further configured to: and if the first waveform does not meet the first preset condition, continuously receiving the vibration parameter uploaded by the at least one acceleration sensor, stamping a time stamp on the received vibration parameter, correspondingly storing the received vibration parameter, continuously judging whether the vibration parameter at the target moment is greater than or equal to a preset threshold value, and timely finding whether the state of the pressure release device 11 is abnormal.

Optionally, on the basis of the second embodiment described above, the data processing system 13 may be further configured to: and if the second waveform does not meet the second preset condition, continuously receiving the vibration parameter uploaded by the at least one acceleration sensor, stamping a time stamp on the received vibration parameter and correspondingly storing the time stamp, continuously judging whether the vibration parameter at the target moment is greater than or equal to a preset threshold value, and timely finding whether the state of the pressure release device 11 is abnormal.

Optionally, on the basis of the second embodiment described above, the data processing system 13 may be further configured to: determining a time at which the pressure release device generates a medium release based on the abnormal state and the occurrence time of the abnormal state; determining medium release information of the medium in the pressure container based on the time when the medium release occurs by the pressure release device and the design parameters of the pressure release device, wherein the medium release information comprises at least one of release duration and release amount, and the design parameters of the pressure release device can comprise at least one of setting pressure, throat and the like; and generating alarm information based on the medium release information, wherein the alarm information specifically comprises the medium release information. Through the alternative scheme, the embodiment of the application can timely and accurately give an alarm to one of the release amount and release time of the pressure release device 11, so that an operation and maintenance person can timely find that the pressure release device 11 is subjected to medium release and take measures, including maintenance, timely replacement and the like. Thereby avoiding the occurrence of safety accidents, unnecessary medium waste and environmental pollution.

Regarding how to determine the medium release information of the medium in the pressure vessel based on the time at which the release of the medium takes place and the design parameters of the pressure release device, reference can be made to the relevant criteria of the pressure release device, as an example.

Assuming that the pressure release device is a safety valve PSV305, according to an equipment manual, the pipe diameter of the safety valve is DN50, the throat diameter is 32 mm, the setting pressure is 16bar, under the working conditions that the medium temperature is normal temperature and the medium is nitrogen, and further assuming that the pressure release of the safety valve is subcritical flow rate, the flow rate is 9230kg/h can be calculated by using a formula (12) in GB 12241-2005. Furthermore, according to the waveform in the second embodiment above, it can be determined that the relief valve is unseated (closed) after 30 seconds of taking off, and the final release amount is 9230/3600×30=76.9 kg can be calculated. Of course, it is only estimated here that the release of the safety valve is related to the jump height of the safety valve, and that the safety valve normally reaches the full stroke of the spring at 10% overpressure, i.e. the maximum release of the safety valve (9230 kg/h) is reached, otherwise the release of the safety valve is smaller than the maximum release.

In summary, according to the online monitoring system for the pressure release device provided by the embodiment of the application, the vibration parameters of the pressure release device can be acquired through at least one acceleration sensor, and the state of the pressure release device can be determined based on the vibration parameters of the pressure release device. When the pressure of the medium in the pressure container exceeds a specified value, the opening and closing part in the pressure release device arranged on the pressure container acts to release the pressure in the pressure container, and the opening and closing part in the pressure release device can vibrate itself or a rigid connecting part thereof when acting, and the vibration caused by the action of the opening and closing part of the pressure release device is different from other vibrations, so that the state of the pressure release device in actual working can be accurately and reversely pushed out through the collected vibration parameters of the pressure release device, thereby timely finding whether the pressure release device is abnormal or whether medium leakage occurs, reducing the occurrence of accidents, and avoiding the problems of unnecessary medium waste, environmental pollution and the like. In addition, the vibration sensor is installed in a non-invasive mode, so that the scheme can achieve the effect of monitoring the state of the pressure release device on line in real time without affecting the normal operation of the pressure container and the pipeline thereof.

It should be noted that, in the on-line monitoring system for a pressure release device provided in the embodiment of the present application, when the number of the acceleration sensors 12 is multiple, the multiple acceleration sensors 12 may respectively send the collected vibration parameters of the pressure release device 11 to the data processing system 13, and accordingly, the data processing system 13 may respectively determine the state of the pressure release device 11 based on the vibration parameters collected by the multiple acceleration sensors 12, so as to obtain multiple state determination results, and then synthesize the multiple state determination results to obtain a final determination result of the state of the pressure release device 11. For example, when the plurality of state determination results are the same, any one of the plurality of state determination results is selected as the final determination result of the state of the pressure release device 11; when the plurality of state determination results are different, the number of similar results among the plurality of state determination results is first determined, any one of the similar results is selected as a final determination result of the state of the pressure release device 11 when the ratio of the number to the total number of state determination results exceeds a preset value, and so on.

It should be further noted that, in fig. 1, the data processing system 13 specifically includes an a/D conversion module 131, a data acquisition module 132, and a status monitoring server 133. The a/D conversion module 131 is configured to receive the analog vibration parameter uploaded by the acceleration sensor 12, convert the analog vibration parameter into a digital signal, and send the digital signal to the data acquisition module 132; the data acquisition module 132 is configured to receive the digital vibration parameter, timestamp the digital vibration parameter and store the digital vibration parameter correspondingly, determine the state of the pressure release device 11 based on the digital vibration parameter, and send the state determination result to the state monitoring server 133; the state monitoring server 133 is configured to generate alarm information and alarm based on the state determination result, so that an operation and maintenance person can timely learn about the dangerous situation of the pressure release device 11.

Those skilled in the art will appreciate that the particular implementation of data processing system 13 may vary and is not limited to that shown in FIG. 1.

The following describes the detailed implementation structure of the data processing system 13 in the on-line monitoring system of the pressure relief device according to an embodiment of the present application by using two examples shown in fig. 2 and 3.

In both examples, some of the modules in the data acquisition system 13 and the acceleration sensor 12 are integrated into one smart meter 134, and the condition monitoring server 133 in the data acquisition system 13 is a relatively independent device. In this way, in practical application, the intelligent instrument 134 is only required to be installed near the pressure release device 11, and the intelligent instrument 134 and the state monitoring server 133 are connected in a wireless (as shown in fig. 2) or wired (as shown in fig. 3) manner, so that the purpose of online monitoring of the pressure release device can be achieved, which is very simple, convenient and easy to implement.

As shown in fig. 2, an on-line monitoring system for a pressure release device according to an embodiment of the present application may include: the pressure release device 11, the acceleration sensor 12 and the data processing system 13, wherein the data processing system 13 comprises a smart meter 134, a wireless gateway 135 and a status monitoring server 133; the smart meter 134 in turn includes a microcontroller 1341 and a wireless transmission module 1342, and the acceleration sensor 12 is also integrated into the smart meter 134; the microcontroller 1341 is provided with an a/D conversion module and a wireless transmission module.

The intelligent instrument 134 is directly or indirectly rigidly connected with the pressure release device 11, so that the purpose of directly or indirectly rigidly connecting the acceleration sensor 12 with the pressure release device 11 is achieved, and the acceleration sensor 12 is electrically connected with the microcontroller 1341 in the intelligent instrument 134.

In the first implementation of the present embodiment, an acceleration sensor 12 is configured to collect the analog vibration parameters of the pressure release device 11 and send the vibration parameters to the microcontroller 1341; a microcontroller 1341 for converting the analog-type vibration parameter into a digital-type vibration parameter, determining the state of the pressure relief device based on the digital-type vibration parameter, and transmitting the state of the pressure relief device 11 to the state monitoring server 133 through the wireless transmission module 1342 and the wireless gateway 135; the state monitoring server 133 is configured to generate alarm information based on the state of the pressure relief device 11.

In the second implementation of the present embodiment, an acceleration sensor 12 is configured to collect the analog vibration parameters of the pressure release device 11 and send the vibration parameters to the microcontroller 1341; the microcontroller 1341 is configured to convert the analog vibration parameter into a digital vibration parameter, and send the digital vibration parameter to the state monitoring server 133 through the wireless transmission module 1342 and the wireless gateway 135; the state monitoring server 133 is configured to determine a state of the pressure relief device 11 based on the digital vibration parameter (acceleration), and generate alarm information based on the state of the pressure relief device 11.

It should be noted that, since the environment in which the pressure release device 11 is located is generally complex, it is not suitable to deploy an active and powerful wireless transmission module (such as WIFI), which results in the limitation of the application of the second embodiment, so the first embodiment is generally recommended. Of course, the use of the second embodiment in the case where conditions are present is not excluded.

It should be noted that, in the present embodiment, the manner of determining the state of the pressure release device 11 based on the digital vibration parameter may refer to the two manners described above, and the description thereof will not be repeated here.

As shown in fig. 3, an on-line monitoring system for a pressure release device according to an embodiment of the present application may include: the pressure release device 11, the acceleration sensor 12 and the data processing system 13, wherein the data processing system 13 comprises a smart meter 134 and a status monitoring server 133; the smart meter 134 in turn includes a microcontroller 1341 and a wired transmission module 1343, and the acceleration sensor 12 is also integrated into the smart meter 134; the microcontroller 1341 is provided with an a/D conversion module and a wired transmission module.

In the present embodiment, an acceleration sensor 12 is configured to collect the analog vibration parameters of the pressure release device 11 and send the vibration parameters to the microcontroller 1341; a microcontroller 1341 for converting the analog-type vibration parameter into a digital-type vibration parameter, determining the state of the pressure relief device based on the digital-type vibration parameter, and transmitting the state of the pressure relief device 11 to the state monitoring server 133 through the wired transmission module 1343; the state monitoring server 133 is configured to generate alarm information based on the state of the pressure relief device 11.

Or in the present embodiment, an acceleration sensor 12 is configured to collect the analog vibration parameters of the pressure release device 11 and send the vibration parameters to the microcontroller 1341; the microcontroller 1341 is configured to convert the analog vibration parameter into a digital vibration parameter, and send the digital vibration parameter to the state monitoring server 133 through the wired transmission module 1343; the state monitoring server 133 is configured to determine a state of the pressure relief device 11 based on the digital vibration parameter, and generate alarm information based on the state of the pressure relief device 11.

It should be noted that, in this embodiment, the manner of determining the state of the pressure release device 11 based on the digital vibration parameter may refer to the two manners described above, and the description thereof will not be repeated here.

The applicant found that in a practical production environment, sometimes the opening and closing member of the pressure release device 11 is not actuated (e.g. is tripped), but the medium in the pressure vessel 10 still leaks through the pressure release device 11, which is possibly caused by the fact that the residual medium at the inlet of the pressure release device 11 is not cleaned in time after the pressure release device 11 is tripped before, and possibly caused by the fact that the end face of the opening and closing member of the pressure release device 11 is damaged when the opening and closing member is tripped back to the seat. Such leakage may not be captured by the acceleration sensor 12 described above, and in order to solve this problem, one of an ultrasonic sensor and a temperature sensor is introduced below to monitor.

Optionally, the online monitoring system for a pressure release device according to an embodiment of the present application may further include, in addition to the pressure release device 11, the acceleration sensor 12, and the data processing system 13: at least one ultrasonic sensor, for example, as shown in fig. 4, may also include an ultrasonic sensor 16, wherein the ultrasonic sensor 16 may be mounted near the outlet of the pressure relief device 11, such as on a second conduit 15 extending from the outlet 113 of the pressure relief device 11.

The purpose of this embodiment is to further confirm whether or not the pressure release device 11 is leaking by additionally adding an ultrasonic sensor to measure ultrasonic waves caused by turbulence generated by leakage of the medium in the pressure vessel 10 from the pressure release device 11 when the state of the pressure release device 11 (such as forward leakage, take off, return seat, chatter, etc.) is measured using the acceleration sensor 12. Because taking the pressure release device 11 as an example of the safety valve, some impurities or viscous liquid in the medium after the opening and closing member in the safety valve is lifted may remain at the end face of the valve seat of the safety valve, so that the opening and closing member in the safety valve cannot be completely retracted and the end face cannot be completely attached (this is why the safety valve is regulated in engineering standards once lifted, and is in principle the reason of being required to be re-checked), the safety valve has a trace leakage, and a series of actions when the opening and closing member in the safety valve is lifted normally cannot occur due to the leakage, so that the ultrasonic sensor is more suitable for monitoring the leakage of the scene than the acceleration sensor. Of course, in addition to sensing such micro-leaks, ultrasonic sensors may also be used to monitor such abnormal conditions as pre-leaks, jumps, seat backs, or chatter, as well as the release of media (also referred to as a leak) that may occur in the pressure relief device.

In particular, the at least one ultrasonic sensor may be configured to collect ultrasonic parameters in the vicinity of the outlet of the pressure relief device 11, which may be a spectral feature of howling caused by a medium leak, which is mainly related to one or more of the following factors: leakage, throat diameter of the pressure relief device, medium pressure and medium temperature, etc.

Specifically, the data processing system 13 may be further configured to acquire the ultrasonic parameter, and determine the state of the pressure release device based on the ultrasonic parameter, which is illustrated below.

The data processing system 13 is specifically configured to: determining whether a designated index value of the ultrasonic parameter of the target period exceeds a preset threshold value, if so, determining that an abnormal state or leakage exists in the pressure release device, otherwise, determining that the abnormal state or the leakage does not exist in the pressure release device.

Wherein the specified index may include, but is not limited to, one or more of the following:

(1) Root Mean Square (RMS) of ultrasonic energy;

(2) RMS of ultrasonic intensity;

(3) Ultrasonic energy;

(4) Ultrasonic intensity.

Wherein the target period includes a first period and/or a second period, the first period is a period of time before and adjacent to a target time, the second period is a period of time after and adjacent to the target time, and the target time may be any time, such as a current time.

Wherein the preset threshold may be empirically set.

It will be appreciated that by the on-line monitoring system for the pressure release device provided by the embodiment shown in fig. 4, the leakage situation that cannot be captured by the acceleration sensor can be accurately and timely captured, so that the various states of the pressure release device can be comprehensively monitored.

Optionally, the online monitoring system for a pressure release device according to an embodiment of the present application may further include, in addition to the pressure release device 11, the acceleration sensor 12, and the data processing system 13: at least one temperature sensor, for example, as shown in fig. 5, may further include a temperature sensor 17 and a temperature sensor 18.

Wherein the at least one first temperature sensor is operable to collect at least one of a first temperature, a second temperature and a third temperature, wherein the first temperature is a temperature near an inlet of the pressure relief device, the second temperature is a temperature near an outlet of the pressure relief device, and the third temperature is an ambient temperature around the pressure relief device.

For example, as shown in FIG. 5, a first temperature may be acquired using a temperature sensor 17 mounted on a first conduit 14 extending from an inlet 112 of the pressure relief device 11, and a second temperature may be acquired using a temperature sensor 18 mounted on a second conduit 15 extending from an outlet 113 of the pressure relief device 11; for the third temperature, it may be measured by other temperature sensors in the production environment in which the pressure relief device 11 is located, or it may be acquired by the temperature sensor 18.

Wherein the data processing system 13 is further operable to obtain a target temperature and determine a state of the pressure relief device based on the target temperature, wherein the target temperature comprises at least one of the first temperature, the second temperature, and the third temperature.

In one example, the data processing system 13 is specifically operable to: acquiring the first temperature and the second temperature, determining an absolute value of a difference between the first temperature and the second temperature, and determining whether the pressure release device has a leak based on the absolute value. More specifically, it may be determined that the pressure relief device has a leak when the absolute value is greater than or equal to a preset value; otherwise, it is determined that the pressure relief device is free of leakage.

In another example, the data processing system 13 may be specifically configured to: the second temperature (temperature near the outlet of the pressure release device 11) at different times is acquired, a time-dependent curve of the second temperature is determined, and whether or not there is a leak in the pressure release device is determined based on the curve. More specifically, the pressure release device may be determined to have a leak when the change curve changes significantly (e.g., a sudden rise or fall, whether a sudden rise or fall occurs may be measured by whether the slope of the change curve is greater than a predetermined slope); otherwise, it is determined that the pressure relief device is free of leakage. It will be appreciated that for the conduit 15 connected to the outlet 113 of the pressure relief device 11, which is typically at ambient temperature when there is no leak in the pressure relief device 11, the temperature of the conduit will change when there is a leak in the pressure relief device 11, because the conduit is filled with a medium which is typically at a temperature different from ambient temperature, and based on this temperature change it can be determined whether there is a leak in the pressure relief device 11.

In a third example, the data processing system 13 is specifically operable to: acquiring the first temperature, the second temperature and the third temperature, determining the absolute value of the difference between the first temperature and the third temperature to obtain a first absolute value, determining the absolute value of the difference between the second temperature and the third temperature to obtain a second absolute value, then determining whether the ratio of the first absolute value to the second absolute value exceeds a preset value, and if so, determining that the pressure release device has leakage; otherwise, it is determined that the pressure relief device is free of leakage.

It should be noted that the manner of determining the state of the pressure release device based on at least one of the first temperature, the second temperature and the third temperature may be varied, and is not limited to the above three.

The leakage state detected by the at least one temperature sensor may be the micro leakage mentioned above, or may be a medium release state accompanying abnormal states such as a front leakage, a jump, a seat return, and a chatter. In addition, the monitoring effect of the at least one temperature sensor on the front is more accurate because the release amount of the medium in abnormal states such as front leakage, jump, seat returning and flutter is generally larger than the leakage amount of the medium in a micro leakage state.

Optionally, the online monitoring system for a pressure release device according to an embodiment of the present application may further include, in addition to the pressure release device 11, the acceleration sensor 12, and the data processing system 13: the at least one ultrasonic sensor and the at least one temperature sensor may further comprise an ultrasonic sensor 16, a temperature sensor 17 and a temperature sensor 18, for example, as shown in fig. 5.

Wherein the at least one ultrasonic sensor is configured to collect ultrasonic parameters near the outlet of the pressure relief device.

The at least one temperature sensor is configured to collect at least one of a first temperature, a second temperature, and a third temperature, where the first temperature is a temperature near an inlet of the pressure release device, the second temperature is a temperature near an outlet of the pressure release device, and the third temperature is an ambient temperature around the pressure release device.

For example, as shown in fig. 5, ultrasonic parameters in the vicinity of the pressure relief device 11 may be acquired using an ultrasonic sensor 16 mounted in the vicinity of the outlet 113 of the pressure relief device 11; the first temperature may be acquired by means of a temperature sensor 17 mounted on a first conduit 14 extending from an inlet 112 of said pressure relief device 11; a second temperature may be acquired by means of a temperature sensor 18 mounted on a second conduit 15 extending from an outlet 113 of said pressure relief device 11; for the third temperature, it may be measured by other temperature sensors in the production environment in which the pressure relief device 11 is located, or it may be acquired by the temperature sensor 18.

Wherein the data processing system 13 is further configured to obtain the ultrasonic parameter and a target temperature, and determine a state of the pressure release device based on the ultrasonic parameter and the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature, and the third temperature, and an example is described below.

In a first example, the data processing system 13 is particularly useful for: determining the state of the pressure release device based on the ultrasonic parameters to obtain a first result, wherein the specific determination manner can be referred to the description of the embodiment shown in fig. 4, and the description is not repeated here; then, determining a state of the pressure relief device based on the target temperature, resulting in a second result; and then, the first result and the second result are integrated to obtain a final determination result of the state of the pressure release device.

In particular, it may be determined that the pressure release device has a leak in case at least one of the first result and the second result is that the pressure release device has a leak. By the determination mode, all possible leakage situations of the pressure release device can be timely found, and no missing report situation exists. Or may be determined to be present in the event that both the first and second results are that the pressure relief device is present in a leak. The determination method can further ensure the accuracy of finding the leakage of the pressure release device, and false alarms can be avoided.

The manner in which the state of the pressure release device is determined based on the target temperature may refer to the description of another embodiment shown in fig. 5, which is not repeated herein.

It can be understood that by the on-line monitoring system for the pressure release device provided by the embodiment shown in fig. 4 or fig. 5, the leakage condition which cannot be captured by the acceleration sensor can be accurately and timely captured, so that the comprehensive monitoring of various states of the pressure release device is realized.

On the basis of the pressure release device on-line monitoring system, the embodiment of the application also provides an on-line monitoring method of the pressure release device, which is described below.

As shown in fig. 6, an on-line monitoring method for a pressure release device according to an embodiment of the present application may include the following steps:

step 601, acquiring vibration parameters of a pressure release device by using at least one acceleration sensor, wherein the at least one acceleration sensor is directly or indirectly rigidly connected with the pressure release device;

Step 602, acquiring the vibration parameters by using a data processing system.

Step 603, determining, with the data processing system, a state of the pressure relief device based on the vibration parameter.

Optionally, as shown in fig. 7, step 601 may specifically include: and acquiring vibration parameters of the pressure release device according to a preset frequency by using at least one acceleration sensor and uploading the vibration parameters to the data processing system.

Accordingly, as shown in fig. 7, step 602 may specifically include: and receiving the vibration parameters uploaded by the at least one acceleration sensor, and stamping a time stamp on the received vibration parameters (acceleration) and storing the time stamp correspondingly.

On this basis, the above step 603 may include various embodiments, and three kinds are described below.

First mode

The step 603 may include: judging whether vibration parameters of a plurality of moments including the current moment are all larger than or equal to a preset threshold value or not; if yes, determining that the pressure release device 11 is in an abnormal state; if not, it is determined that the pressure release device 11 is in a normal state.

The plurality of time instants may include a current time instant and a plurality of history time instants adjacent to the current time instant, and a time interval between two adjacent time instants in the plurality of time instants is smaller than a preset time interval (for example, x seconds, x is greater than 0).

The abnormal state is relative to the normal state, and the normal state refers to a state that the opening and closing part of the pressure release device is closed and does not act, and at the moment, the pressure of a medium in the pressure container is smaller than or equal to a specified value; the abnormal state refers to a state that the opening and closing member of the pressure release device acts, and at this time, the pressure of the medium in the pressure container may exceed a specified value, specifically, the abnormal state includes at least one specified state and the medium release accompanied by the specified state, and the at least one specified state includes one or more of a pre-leak, a take-off, a seat returning and a flutter.

The preset threshold is determined according to the change trend of the vibration parameters of the pressure release device in the process that the pressure release device changes from a normal state to an abnormal state. For example, the preset threshold may be greater than 0m/s ².

It is apparent that whether the pressure release device is in an abnormal state can be accurately judged by the first mode. Optionally, if in an abnormal state, the alarm information may be further generated.

Second mode

The step 603 may include:

Step 6031, judging whether the vibration parameter of the target moment is larger than or equal to a preset threshold value; if yes, go to step 6032, otherwise, go back to step 602.

Step 6032, determining a first waveform of a vibration parameter of the pressure release device over time in a first period of time, and determining a second waveform of the vibration parameter of the pressure release device over time in a second period of time, wherein the first period of time is a period of time before and adjacent to the target time, and the second period of time is a period of time after and adjacent to the target time.

Step 6033, determining whether the first waveform meets a first preset condition; if yes, go to step 6034, otherwise, go back to step 602.

Step 6034, determining whether the second waveform meets a second preset condition; if yes, go to step 6035, otherwise, go back to step 602.

Step 6035, determining an abnormal state of the pressure release device and an occurrence time of the abnormal state based on the first waveform and the second waveform.

Wherein the abnormal state includes at least one specified state and a media release accompanying the specified state, the at least one specified state including one or more of a pre-leak, a jump, a backseat, and a flutter.

Wherein the first preset condition includes: matching a first preset waveform, wherein the first preset waveform is a waveform of the vibration parameter of the pressure release device in a pre-determined forward leakage state changing along with time; the second preset condition includes: and matching with a second preset waveform, wherein the second preset waveform is a waveform of the vibration parameter of the pressure release device in a preset take-off state changing along with time.

Optionally, on the basis of the second embodiment, the method may further include: determining a time at which the pressure release device generates a medium release based on the abnormal state and the occurrence time of the abnormal state; determining medium release information of the medium in the pressure container based on the time when the medium release occurs by the pressure release device and the design parameters of the pressure release device, wherein the medium release information comprises at least one of release duration and release amount, and the design parameters of the pressure release device can comprise at least one of setting pressure, throat and the like; and generating alarm information based on the medium release information, wherein the alarm information specifically comprises the medium release information. Through the alternative scheme, the embodiment of the application can timely and accurately give an alarm to one of the release amount and the release time of the pressure release device, so that an operation and maintenance person can timely find that the pressure release device releases a medium and take measures, including overhaul, timely replacement and the like. Thereby avoiding the occurrence of safety accidents, unnecessary medium waste and environmental pollution.

According to the on-line monitoring method for the pressure release device, provided by the embodiment of the application, the vibration parameters of the pressure release device can be acquired through at least one acceleration sensor, and the state of the pressure release device can be determined based on the vibration parameters of the pressure release device. When the pressure of the medium in the pressure container exceeds a specified value, the opening and closing part in the pressure release device arranged on the pressure container acts to release the pressure in the pressure container, and the opening and closing part in the pressure release device can vibrate itself or a rigid connecting part thereof when acting, and the vibration caused by the action of the opening and closing part of the pressure release device is different from other vibrations, so that the state of the pressure release device in actual working can be accurately and reversely pushed out through the collected vibration parameters of the pressure release device, thereby timely finding whether the pressure release device is abnormal or has medium leakage or not, reducing the occurrence of accidents, and avoiding the problems of unnecessary medium waste, environmental pollution and the like. In addition, the vibration sensor is installed in a non-invasive mode, so that the scheme can achieve the effect of monitoring the state of the pressure release device on line in real time without affecting the normal operation of the pressure container and the pipeline thereof.

The applicant found that in a practical production environment, sometimes the opening and closing member of the pressure release device does not act (e.g. jump), but the medium in the pressure container still leaks through the pressure release device, and found that this may be caused by the fact that the residual medium at the inlet of the pressure release device is not cleaned in time after the jump before the pressure release device, or may be caused by the fact that the end face of the opening and closing member of the pressure release device is damaged when the opening and closing member of the pressure release device jumps back to the seat. Such leakage may not be captured by the acceleration sensor described above, and in order to solve this problem, at least one of an ultrasonic sensor and a temperature sensor is introduced below to monitor.

Optionally, as shown in fig. 8, in addition to the steps 601, 602, and 603, the method for online monitoring a pressure release device according to the embodiment of the present application may further include:

step 604, collecting ultrasonic parameters near the outlet of the pressure relief device using at least one ultrasonic sensor.

Step 605, acquiring the ultrasonic parameter by using the data processing system, and determining the state of the pressure release device based on the ultrasonic parameter.

As an example, the step 605 may include: determining whether a designated index value of the ultrasonic parameter of the target period exceeds a preset threshold value, if so, determining that an abnormal state or leakage exists in the pressure release device, otherwise, determining that the abnormal state or the leakage does not exist in the pressure release device.

(1) Root Mean Square (RMS) of ultrasonic energy;

(2) RMS of ultrasonic intensity;

(3) Ultrasonic energy;

(4) Ultrasonic intensity.

The purpose of this embodiment is that, when the acceleration sensor is used to measure the state of the pressure release device (such as the working conditions of forward leakage, jump, seat return, vibration, etc.), an ultrasonic sensor may be additionally added to measure the ultrasonic wave caused by the turbulence generated by the leakage of the medium in the pressure container from the pressure release device, so as to further confirm whether the pressure release device has leakage. Because taking the pressure release device as an example of the safety valve, sometimes some impurities or viscous liquid in the medium after the opening and closing part in the safety valve is tripped can remain at the end face of the valve seat of the safety valve, so that the opening and closing part in the safety valve cannot be completely retracted and the end face cannot be completely attached (which is why the safety valve is required to be re-checked in principle once the opening and closing part is tripped in engineering standards), the safety valve has trace leakage, and a series of actions of the opening and closing part in the safety valve during normal tripping cannot occur due to the leakage, so that the ultrasonic sensor is more suitable for monitoring the leakage of the scene than the acceleration sensor. Of course, in addition to sensing such micro-leaks, ultrasonic sensors may also be used to monitor such abnormal conditions as pre-leaks, jumps, seat backs, or chatter when such abnormal conditions occur in the pressure relief device, as well as with the release of the medium.

Optionally, as shown in fig. 9, in addition to the steps 601, 602, and 603, the method for online monitoring a pressure release device according to the embodiment of the present application may further include:

step 606, collecting at least one of a first temperature, a second temperature and a third temperature by using at least one first temperature sensor, wherein the first temperature is a temperature near an inlet of the pressure release device, the second temperature is a temperature near an outlet of the pressure release device, and the third temperature is an ambient temperature around the pressure release device.

Step 607, obtaining a target temperature using the data processing system, and determining a state of the pressure relief device based on the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature, and the third temperature.

In one example, the step 607 may specifically include: acquiring the first temperature and the second temperature, determining an absolute value of a difference between the first temperature and the second temperature, and determining whether the pressure release device has a leak based on the absolute value. More specifically, it may be determined that a leak exists in the pressure relief device when the difference is greater than or equal to a preset value; otherwise, it is determined that the pressure relief device is free of leakage.

In another example, the step 607 may specifically include: the second temperature (temperature near the outlet of the pressure release device) at different times is acquired, a time-dependent curve of the second temperature is determined, and whether or not there is a leak in the pressure release device is determined based on the curve. More specifically, the pressure release device may be determined to have a leak when the change curve changes significantly (e.g., a sudden rise or fall, whether a sudden rise or fall occurs may be measured by whether the slope of the change curve is greater than a predetermined slope); otherwise, it is determined that the pressure relief device is free of leakage. It will be appreciated that for a conduit connected to the outlet of the pressure relief device, which is typically at ambient temperature when there is no leak in the pressure relief device, the temperature of the conduit will change as the medium enters the conduit and the temperature of the medium is typically different from the ambient temperature, based on which it can be determined whether there is a leak in the pressure relief device.

In a third example, the step 607 may specifically include: acquiring the first temperature, the second temperature and the third temperature, determining the absolute value of the difference between the first temperature and the third temperature to obtain a first absolute value, determining the absolute value of the difference between the second temperature and the third temperature to obtain a second absolute value, then determining whether the ratio of the first absolute value to the second absolute value exceeds a preset value, and if so, determining that the pressure release device has leakage; otherwise, it is determined that the pressure relief device is free of leakage.

Optionally, as shown in fig. 10, in addition to the steps 601, 602, and 603, the method for online monitoring a pressure release device according to the embodiment of the present application may further include:

Step 608, acquiring the ultrasonic parameter and a target temperature by using the data processing system, and determining a state of the pressure release device based on the ultrasonic parameter and the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature, and the third temperature.

In one example, the data processing system 13 is specifically operable to: determining the state of the pressure release device based on the ultrasonic parameters to obtain a first result, wherein the specific determination manner can be referred to the description of the embodiment shown in fig. 4, and the description is not repeated here; then, determining a state of the pressure relief device based on the target temperature, resulting in a second result; and then, the first result and the second result are integrated to obtain a final determination result of the state of the pressure release device.

The manner in which the state of the pressure release device is determined based on the target temperature may refer to the description of the embodiment shown in fig. 9, which is not repeated herein.

It can be understood that by the on-line monitoring method for the pressure release device provided by the embodiments shown in fig. 8, 9 or 10, the leakage situation that cannot be captured by the acceleration sensor can be accurately and timely captured, so that the pressure release device can be comprehensively monitored in various states.

The method for online monitoring the pressure release device provided by the embodiment of the application is realized on the basis of the online monitoring system of the pressure release device provided by the embodiment of the application, and can achieve the same technical effects, so that the description of the method embodiment part is more brief, and relevant parts are referred to the method embodiment part and are not repeated.

It should be noted that, in the present application, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. An online monitoring system for a pressure release device, characterized in that the monitoring system comprises: a pressure release device, at least one acceleration sensor and a data processing system, wherein the at least one acceleration sensor is directly or indirectly rigidly connected to the pressure release device, and the pressure release device is used to protect a pressure vessel;

The at least one acceleration sensor is used to collect vibration parameters of the pressure release device at a preset frequency and upload them to the data processing system;

The data processing system is used for:

Receiving vibration parameters uploaded by the at least one acceleration sensor, adding a timestamp to the received vibration parameters and storing them accordingly;

Determine whether the vibration parameter at the target time is greater than or equal to a preset threshold;

In the case where the vibration parameter at the target moment is greater than or equal to a preset threshold, determining a first waveform of the vibration parameter of the pressure release device in a first time period that changes with time, and determining a second waveform of the vibration parameter of the pressure release device in a second time period that changes with time, wherein the first time period is a period of time before the target moment and adjacent to the target moment, and the second time period is a period of time after the target moment and adjacent to the target moment;

Determining whether the first waveform meets a first preset condition;

When the first waveform meets the first preset condition, determining whether the second waveform meets the second preset condition;

In a case where the second waveform meets the second preset condition, determining the abnormal state of the pressure release device and the occurrence time of the abnormal state based on the first waveform and the second waveform;

The state of the pressure release device includes one of a normal state, the abnormal state and a leakage state, the abnormal state includes at least one specified state and the medium release accompanying the specified state, and the at least one specified state includes one or more of forward leakage, take-off, reseating and flutter;

Wherein, the first preset condition includes: matching with a first preset waveform, wherein the first preset waveform is a waveform of a vibration parameter of the pressure release device in a predetermined forward discharge state changing with time;

The second preset condition includes: matching with a second preset waveform, wherein the second preset waveform is a waveform of a vibration parameter of the pressure release device in a predetermined take-off state changing with time.

2. The monitoring system according to claim 1, characterized in that:

The at least one acceleration sensor is mounted adjacent to the pressure relief device.

3. The monitoring system according to claim 1, characterized in that:

The data processing system is also used for:

Based on the abnormal state and the time when the abnormal state occurs, determining the time when the pressure release device releases the medium;

Determining medium release information of the medium in the pressure vessel based on the time when the medium release occurs in the pressure release device and the design parameters of the pressure release device, wherein the medium release information includes at least one of a release duration and a release amount;

Generate warning information based on the medium release information.

4. The monitoring system according to any one of claims 1 to 3, characterized in that the data processing system comprises a microcontroller, a transmission module and a status monitoring server;

The at least one acceleration sensor is used to collect analog vibration parameters of the pressure release device and send them to the microcontroller;

in,

The microcontroller is used to convert the analog vibration parameters into digital vibration parameters, determine the state of the pressure release device based on the digital vibration parameters, and send the state of the pressure release device to the state monitoring server through the transmission module;

The state monitoring server is used to generate alarm information based on the state of the pressure release device;

or,

The microcontroller is used to convert the analog vibration parameters into digital vibration parameters, and send the digital vibration parameters to the status monitoring server through the transmission module;

The state monitoring server is used to determine the state of the pressure release device based on the digital vibration parameters, and generate alarm information based on the state of the pressure release device.

5. The monitoring system according to claim 4, characterized in that:

The microcontroller, the transmission module and the at least one acceleration sensor are integrated in an intelligent meter.

6. The monitoring system according to any one of claims 1 to 3, characterized in that the monitoring system further comprises: at least one ultrasonic sensor;

The at least one ultrasonic sensor is used to collect ultrasonic parameters near the outlet of the pressure release device;

The data processing system is also used to obtain the ultrasonic parameters and determine the state of the pressure release device based on the ultrasonic parameters.

7. The monitoring system according to claim 6, characterized in that:

The data processing system is specifically used to determine whether the specified index value of the ultrasonic parameter in the target time period exceeds a preset threshold value. If so, it is determined that the pressure release device is in an abnormal state or has a leak. Otherwise, it is determined that the pressure release device is not in an abnormal state or has no leak. The target time period includes a first time period and/or a second time period, the first time period is a period of time before the target moment and adjacent to the target moment, and the second time period is a period of time after the target moment and adjacent to the target moment.

8. The monitoring system according to any one of claims 1 to 3, characterized in that the monitoring system further comprises: at least one temperature sensor;

The at least one temperature sensor is used to collect at least one of a first temperature, a second temperature and a third temperature, wherein the first temperature is a temperature near an inlet of the pressure release device, the second temperature is a temperature near an outlet of the pressure release device, and the third temperature is an ambient temperature around the pressure release device;

The data processing system is further used to obtain a target temperature and determine a state of the pressure release device based on the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature and the third temperature.

9. The monitoring system according to any one of claims 1 to 3, characterized in that the monitoring system further comprises: at least one ultrasonic sensor and at least one temperature sensor;

The data processing system is also used to obtain the ultrasonic parameters and the target temperature, and determine the state of the pressure release device based on the ultrasonic parameters and the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature and the third temperature.

10. A method for online monitoring of a pressure release device, characterized in that the pressure release device is used to protect a pressure vessel, and the method comprises:

Using at least one acceleration sensor to collect vibration parameters of the pressure release device, wherein the at least one acceleration sensor is directly or indirectly rigidly connected to the pressure release device;

Acquiring the vibration parameters using a data processing system;

determining, using the data processing system, a state of the pressure relief device based on the vibration parameter;

Wherein, the collecting vibration parameters of the pressure release device by using at least one acceleration sensor comprises: collecting the vibration parameters of the pressure release device by using at least one acceleration sensor at a preset frequency and uploading them to the data processing system;

Wherein, the obtaining of the vibration parameters by using the data processing system includes: receiving the vibration parameters uploaded by the at least one acceleration sensor, adding a timestamp to the received vibration parameters and storing them accordingly;

Wherein, the determining the state of the pressure release device based on the vibration parameter by using the data processing system comprises:

Determining whether the first waveform meets a first preset condition;

The state of the pressure release device includes one of a normal state, the abnormal state and a leakage state, wherein the abnormal state includes at least one specified state and a medium release accompanying the specified state, and the at least one specified state includes one or more of forward leakage, take-off, reseating and flutter;

11. The method according to claim 10, further comprising:

Determining the time when the medium is released by the pressure release device based on the abnormal state and the time when the abnormal state occurs by using the data processing system;

Determining medium release information of the medium in the pressure vessel using the data processing system based on the time when the medium release occurs in the pressure release device and the design parameters of the pressure release device, wherein the medium release information includes at least one of a release duration and a release amount;

The data processing system is used to generate warning information based on the medium release information.

12. The method according to claim 10 or 11, further comprising:

Using at least one ultrasonic sensor to collect ultrasonic parameters near the outlet of the pressure release device;

The ultrasonic parameters are acquired by using the data processing system, and the state of the pressure release device is determined based on the ultrasonic parameters.

13. The method according to claim 12, characterized in that the determining the state of the pressure relief device based on the ultrasonic parameter comprises:

Determine whether the specified index value of the ultrasonic parameter of the target time period exceeds the preset threshold value. If so, determine that the pressure release device is in an abnormal state or has a leak. Otherwise, determine that the pressure release device is not in an abnormal state or has no leak, wherein the target time period includes a first time period and/or a second time period, the first time period is a period of time before the target moment and adjacent to the target moment, and the second time period is a period of time after the target moment and adjacent to the target moment.

14. The method according to claim 10 or 11, further comprising:

Using at least one first temperature sensor to collect at least one of a first temperature, a second temperature, and a third temperature, wherein the first temperature is a temperature near an inlet of the pressure release device, the second temperature is a temperature near an outlet of the pressure release device, and the third temperature is an ambient temperature around the pressure release device;

The data processing system is used to acquire a target temperature, and a state of the pressure release device is determined based on the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature, and the third temperature.

15. The method according to claim 10 or 11, further comprising:

The data processing system is used to acquire the ultrasonic parameters and the target temperature, and the state of the pressure release device is determined based on the ultrasonic parameters and the target temperature, wherein the target temperature includes at least one of the first temperature, the second temperature and the third temperature.