CN-121997096-A - Pilot-operated safety valve take-off diagnosis method and device, electronic equipment and storage medium

CN121997096ACN 121997096 ACN121997096 ACN 121997096ACN-121997096-A

Abstract

The application discloses a method, a device, electronic equipment and a storage medium for diagnosing the jump of a pilot-operated safety valve, which relate to the technical field of safety valves and comprise the steps of deploying various sensors to synchronously acquire multi-source physical signals of the pilot-operated safety valve in the operation process; the method comprises the steps of constructing a reference model representing the normal state of a valve based on a multi-source physical signal, monitoring the deviation condition of the currently acquired signal characteristic and the reference model in real time, triggering a diagnosis process when the signal characteristic is continuously detected to deviate from the reference model, identifying a pilot valve opening event and a main valve opening event, obtaining characteristic parameters related to each opening event, and judging the jump-up state of a pilot type safety valve based on the identification result of the pilot valve opening event and the main valve opening event and the comparison result of the characteristic parameters and a preset threshold value. The method achieves the technical effects of realizing online real-time high-precision diagnosis of the jump state of the pilot-operated safety valve, accurately judging the jump integrity and timeliness, and improving the diagnosis reliability and the operation safety and reliability of the nuclear power station.

Inventors

JIANG YONG
MENG XIN
TANG XULI
LIU QINGFENG
YUE DAHAO
ZOU DESHENG
DAI YANGYANG
HOU YAJIE
XU CHUNDONG
LI QUANJIE
ZHANG XIAOBIN
LIU HANTANG
XING KAI
XU WEIQIANG
ZHOU TAO

Assignees

华能核能技术研究院有限公司
华能吉林发电有限公司
北京航天石化技术装备工程有限公司
华能集团技术创新中心有限公司

Dates

Publication Date: 20260508
Application Date: 20251226

Claims (10)

1. A pilot operated safety valve take-off diagnostic method, comprising: deploying various sensors to synchronously acquire multi-source physical signals of the pilot-operated safety valve in the running process; constructing a reference model representing the normal state of the valve based on the multi-source physical signals, and monitoring the deviation condition of the currently acquired signal characteristics and the reference model in real time; when the signal characteristics are monitored to continuously deviate from the reference model, triggering a diagnosis process, identifying a pilot valve opening event and a main valve opening event, and acquiring characteristic parameters related to each opening event; and comprehensively judging the jump-up state of the pilot safety valve based on the identification result of the pilot valve opening event and the main valve opening event and the comparison result of the characteristic parameter and a preset threshold value.
2. The method of claim 1, wherein the deploying the plurality of sensors to synchronously collect the multi-source physical signals of the pilot operated safety valve during operation comprises: the method comprises the steps of disposing a pressure sensor for collecting fluid pressure signals, an acoustic emission sensor for collecting acoustic emission signals of a valve body, a vibration sensor for collecting structural vibration signals and a displacement sensor for collecting valve rod displacement signals; the method comprises the steps of arranging a pressure sensor in an inlet pipeline of a pilot type safety valve, arranging the acoustic emission sensor in an area, corresponding to a pilot valve and a main valve, of the outer wall of a valve body of the pilot type safety valve in a coupling mode, arranging the vibration sensor in an outlet pipeline or a valve body flange of the pilot type safety valve, and arranging the displacement sensor in a main valve rod of the pilot type safety valve.
3. The pilot operated safety valve take-off diagnostic method of claim 1, wherein the constructing a reference model characterizing a normal state of a valve based on the multi-source physical signal comprises: Extracting signal characteristics based on historical signal data acquired by the sensor in a preset normal operation time period to train and generate the reference model; in the real-time monitoring process, calculating the matching degree or error between the real-time characteristics of the signals acquired in real time and the reference model; and when the matching degree is lower than a preset matching degree threshold value or the error continuously exceeds a preset error threshold value for a first preset duration, determining that the signal characteristic continuously deviates from the reference model.
4. The method of claim 1, wherein triggering a diagnostic process when a signal characteristic is detected to continuously deviate from the reference model, identifying pilot valve opening events and main valve opening events, and acquiring characteristic parameters associated with each opening event, comprises: when the signal characteristics are judged to be continuously deviated, an event diagnosis program is started, and original high sampling rate signal data in a second preset time period before and after the triggering time is analyzed; identifying a pilot valve opening event in the signal data based on a short-time energy characteristic of the acoustic emission signal and recording a first timestamp thereof; Identifying a main valve opening event based on abrupt change characteristics of at least one of an acoustic emission signal, a vibration signal, a pressure signal and a displacement signal within a third preset time period after the first time stamp, and recording a second time stamp thereof; The acquired characteristic parameters at least comprise the first timestamp, the second timestamp and a pressure value when diagnosis is triggered.
5. The pilot operated safety valve take-off diagnosis method according to claim 1, wherein the comprehensively judging the take-off state of the pilot operated safety valve based on the recognition result of the pilot valve opening event and the main valve opening event and the comparison result of the characteristic parameter and a preset threshold value, comprises: if the main valve opening event is not recognized, judging that the jump is incomplete; if the main valve opening event is identified, comparing the pressure value in triggering diagnosis with the preset pressure value of the valve, judging the starting timeliness according to the comparison result, calculating the time delay of the second time stamp and the first time stamp, and judging the internal response state according to the comparison result of the time delay and the preset normal response time range.
6. The pilot operated safety valve take-off diagnostic method according to claim 1, further comprising: The characteristic parameters obtained from the past diagnosis are stored and the valve performance degradation trend is evaluated based on a long-term trend analysis of the characteristic parameters.
7. A pilot operated relief valve take-off diagnostic device, comprising: the deployment module is configured to deploy various sensors to synchronously acquire multi-source physical signals of the pilot-operated safety valve in the operation process; the construction module is configured to construct a reference model representing the normal state of the valve based on the multi-source physical signals and monitor the deviation condition of the currently acquired signal characteristics and the reference model in real time; The triggering module is configured to trigger a diagnosis process when the signal characteristics are monitored to continuously deviate from the reference model, identify a pilot valve opening event and a main valve opening event, and acquire characteristic parameters related to each opening event; the judging module is configured to comprehensively judge the jump-off state of the pilot-operated safety valve based on the identification result of the pilot-operated valve opening event and the main valve opening event and the comparison result of the characteristic parameter and a preset threshold value.
8. An electronic device, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; Wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the pilot operated safety valve take-off diagnostic method of any one of claims 1-6.
9. A non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the pilot operated safety valve take-off diagnostic method according to any one of claims 1-6.
10. A computer program product comprising a computer program which, when executed by a processor, implements the pilot operated safety valve take-off diagnostic method according to any one of claims 1-6.

Description

Pilot-operated safety valve take-off diagnosis method and device, electronic equipment and storage medium Technical Field The application relates to the technical field of safety valves, in particular to a pilot-operated safety valve jump diagnosis method, a device, electronic equipment and a storage medium. Background In a nuclear power station reactor coolant system and a main steam system, a pilot type safety valve is key equipment for guaranteeing the integrity of a pressure boundary and preventing the overpressure of the system, and a two-stage opening mechanism of pilot valve opening before main valve opening is adopted, so that the system has the advantages of accurate opening, good sealing performance and the like, but brings complexity to state diagnosis. The related technology has obvious limitations that the traditional monitoring relies on single parameters, the pressure switch is easy to be interfered by fluctuation to cause false alarm and missing report, the limit switch cannot capture the starting dynamic details, the action of the pilot valve and the action of the main valve cannot be accurately distinguished, specific faults such as the blocking and the hysteresis of the main valve cannot be diagnosed, the acoustic emission monitoring technology is used for steady-state leakage diagnosis, but no mature scheme exists for the accurate diagnosis of the transient process such as the starting, the periodic off-line verification is relied, the cost is high, the health state of the valve cannot be monitored in real time, the early warning of performance degradation is difficult to realize, and the breakthrough of the related technology is needed to solve the problems. Disclosure of Invention The application provides a pilot-operated safety valve take-off diagnosis method, a device, electronic equipment and a storage medium. The problems that the reliability is insufficient, the action of a pilot valve and a main valve cannot be accurately distinguished and an effective real-time tripping state diagnosis means is lacked due to the dependence on a single parameter in the related technology can be solved. According to a first aspect of the present application, there is provided a pilot operated safety valve take-off diagnosis method, comprising: deploying various sensors to synchronously acquire multi-source physical signals of the pilot-operated safety valve in the running process; constructing a reference model representing the normal state of the valve based on the multi-source physical signals, and monitoring the deviation condition of the currently acquired signal characteristics and the reference model in real time; when the signal characteristics are monitored to continuously deviate from the reference model, triggering a diagnosis process, identifying a pilot valve opening event and a main valve opening event, and acquiring characteristic parameters related to each opening event; and comprehensively judging the jump-up state of the pilot safety valve based on the identification result of the pilot valve opening event and the main valve opening event and the comparison result of the characteristic parameter and a preset threshold value. According to a second aspect of the present application, there is provided a pilot operated relief valve take-off diagnostic apparatus comprising: the deployment module is configured to deploy various sensors to synchronously acquire multi-source physical signals of the pilot-operated safety valve in the operation process; the construction module is configured to construct a reference model representing the normal state of the valve based on the multi-source physical signals and monitor the deviation condition of the currently acquired signal characteristics and the reference model in real time; The triggering module is configured to trigger a diagnosis process when the signal characteristics are monitored to continuously deviate from the reference model, identify a pilot valve opening event and a main valve opening event, and acquire characteristic parameters related to each opening event; the judging module is configured to comprehensively judge the jump-off state of the pilot-operated safety valve based on the identification result of the pilot-operated valve opening event and the main valve opening event and the comparison result of the characteristic parameter and a preset threshold value. According to a third aspect of the present application, there is provided an electronic device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the pilot operated safety valve take-off diagnostic method of the first aspect. According to a fourth aspect of the present application, there is provided a non-transitory computer-readable storage medium storing computer instructions for causing a computer