阅读说明：本技术 高温气冷堆蒸汽发生器调试用声响监控装置及方法 (Sound monitoring device and method for debugging high-temperature gas cooled reactor steam generator ) 是由 李海泉 严义杰 张亚男 于 2021-04-29 设计创作，主要内容包括：本公开提供一种高温气冷堆蒸汽发生器调试用声响监控装置及方法,所述声响监控装置包括控制模块以及多个音频采集模块；所述控制模块与所述多个音频采集模块电连接,所述多个音频采集模块分别被配置在蒸汽发生器的多个法兰结合面和筒体一侧；所述音频采集模块,用于采集各所述法兰结合面和筒体处的音频信号；所述控制模块,用于根据所述音频信号确定各所述法兰结合面的错动状态,以及所述筒体内部构件的松脱状态。能够对蒸汽发生器进行全面的声响监控,实现调试期对蒸汽发生器壳体法兰面间错动现象、蒸汽发生器内部构件松脱现象的有效监控。(The present disclosure provides a sound monitoring device and method for debugging a high temperature gas cooled reactor steam generator, wherein the sound monitoring device comprises a control module and a plurality of audio acquisition modules; the control module is electrically connected with the plurality of audio acquisition modules, and the plurality of audio acquisition modules are respectively arranged on a plurality of flange joint surfaces of the steam generator and one side of the cylinder; the audio acquisition module is used for acquiring audio signals at the joint surfaces of the flanges and the cylinder; and the control module is used for determining the dislocation state of each flange joint surface and the loosening state of the internal components of the cylinder according to the audio signals. Can carry out comprehensive sound control to steam generator, realize the debugging period to steam generator shell flange inter-facial dislocation phenomenon, the effective control of steam generator internal member pine phenomenon.)

1. The sound monitoring device for debugging the high-temperature gas cooled reactor steam generator is characterized by comprising a control module and a plurality of audio acquisition modules;

the control module is electrically connected with the plurality of audio acquisition modules, and the plurality of audio acquisition modules are respectively arranged on a plurality of flange joint surfaces of the steam generator and one side of the cylinder;

the audio acquisition module is used for acquiring audio signals at the joint surfaces of the flanges and the cylinder;

and the control module is used for determining the dislocation state of each flange joint surface and the loosening state of the internal components of the cylinder according to the audio signals.

2. The acoustic monitoring device of claim 1, wherein the control module for determining a state of misalignment of the respective flange engagement surfaces and a state of disengagement of the barrel inner member based on the audio signal comprises:

the control module is specifically configured to:

comparing the sound intensity value of the current audio signal with a preset alarm sound intensity threshold value, and outputting an alarm if the sound intensity value exceeds the alarm sound intensity threshold value; and the number of the first and second electrodes,

if the current audio signal is a single wave crest in a short time, the peak value sound intensity value is high, and the background noise energy is restored to the state before alarming after alarming, determining that the flange joint surface corresponding to the current audio signal has a dislocation phenomenon;

and if the current audio signal is a continuous or discontinuous continuous sound, the peak sound intensity value is low, and the background noise after the alarm is obviously higher than the state before the alarm, determining that the internal component of the cylinder is loosened.

3. The acoustic monitoring device of claim 2, wherein the control module, after determining that the flange interface corresponding to the current audio signal has a slip, is further configured to determine an abnormal flange acoustic position according to the current audio signal.

4. The acoustic monitoring device of claim 3, wherein four audio acquisition modules are disposed at the flange junction surface corresponding to the current audio signal, the four audio acquisition modules being arranged in a matrix;

the control module is further configured to determine an abnormal flange sound position according to the current audio signal, and includes:

acquiring a first sound intensity difference of two audio acquisition modules in a first matrix direction arranged in a matrix;

acquiring a second sound intensity difference of two audio acquisition modules in a second matrix direction in matrix arrangement;

and determining the abnormal flange sound position according to the first sound intensity difference and the second sound intensity difference.

5. The acoustic monitoring device of any one of claims 1-4, further comprising a recording module electrically coupled to the audio acquisition module for recording and storing the audio signal.

6. The sound monitoring device of any one of claims 1-4, wherein the audio capture module employs a microphone.

7. The acoustic monitoring device of any one of claims 1 to 4, wherein the flange interface comprises a fan case top flange interface, a fan case barrel lower flange interface, and a steam generator barrel flange interface.

8. A sound monitoring method for debugging a high temperature gas cooled reactor steam generator is characterized by comprising the following steps:

collecting audio signals of each flange joint surface and the barrel of the steam generator;

and determining the dislocation state of the joint surfaces of the flanges and the loosening state of the internal components of the cylinder according to the audio signals.

9. The method of claim 8, wherein said determining a state of misalignment of each of said flange engagement surfaces and a state of disengagement of said barrel inner member from said audio signal comprises:

comparing the sound intensity value of the current audio signal with a preset alarm sound intensity threshold value, and outputting an alarm if the sound intensity value exceeds the alarm sound intensity threshold value; and the number of the first and second electrodes,

if the current audio signal is a single wave crest in a short time, the peak value sound intensity value is high, and the background noise energy is restored to the state before alarming after alarming, determining that the flange joint surface corresponding to the current audio signal has a dislocation phenomenon;

and if the current audio signal is a continuous or discontinuous continuous sound, the peak sound intensity value is low, and the background noise after the alarm is obviously higher than the state before the alarm, determining that the internal component of the cylinder is loosened.

10. The method of claim 9, wherein after determining that the flange joint surface corresponding to the current audio signal has a slip phenomenon, the method further comprises:

determining the abnormal flange sound position according to the audio signal, specifically:

acquiring a first sound intensity difference in a first matrix direction;

acquiring a second sound intensity difference in a second matrix direction;

and determining the abnormal flange sound position according to the first sound intensity difference and the second sound intensity difference.

Technical Field

The disclosure belongs to the technical field of debugging and monitoring of high temperature gas cooled reactors, and particularly relates to a sound monitoring device and method for debugging a steam generator of a high temperature gas cooled reactor.

Background

The high-temperature gas cooled reactor is a further development of an improved gas cooled reactor AGR, helium with good chemical inertness and thermal performance is used as a coolant, fuel elements which are made of all-ceramic wrapped fuel particles with excellent performance for binding radioactive fission products and dispersed in a graphite matrix are used, and heat-resistant graphite is used as a moderator and a reactor core structural material, so that the temperature of the helium at the outlet of the reactor core can reach more than 750 ℃ and even reach 950 ℃. The high temperature gas cooled reactor is the reactor type with the highest operation temperature in various nuclear reactors, the steam generator is used as the core equipment for connecting the first loop and the second loop of a high temperature gas cooled reactor nuclear power plant, the structure of the high temperature gas cooled reactor is completely different from that of the steam generator of an active pressurized water reactor, and the high temperature gas cooled reactor is the first direct current steam generator for nuclear power in China.

A steam generator heat exchanger and a main helium fan are wrapped in a high-temperature gas cooled reactor steam generator shell, and a fan shell top cover, a fan shell barrel, a fan shell supporting barrel and a steam generator shell barrel are in flange connection, so that equipment is convenient to manufacture, install and maintain. Because the structural size difference of the four parts is large, the phenomenon of dislocation between flange surfaces of the parts due to the difference of expansion deformation speeds can exist when the pressure of a system changes. Although the dislocation between the flange surfaces during the pressure rising and reducing processes of the system is a condition within expectation, the monitoring is also necessary to summarize the law and provide reference for subsequent engineering construction, so that the dislocation of the flange surfaces of the steam generator needs to be monitored and counted in the debugging stage.

In order to more effectively utilize the heat generated by the reactor core of the high-temperature gas cooled reactor, the heat exchanger of the steam generator of the high-temperature gas cooled reactor adopts a direct-current spiral coil pipe structure, helium gas heated to 750 ℃ by the reactor core of the reactor enters from the upper part of the shell of the steam generator, washes a heat exchange assembly from top to bottom and transfers the heat to water of a secondary loop; the water on the secondary side is converted into steam at 570 ℃ from bottom to top through the heat transfer pipes by the water supply header, and the steam pushes the turbonator to rotate to generate electricity. The spiral coil is connected with the water supply header and the steam header through connecting pipes, the connecting pipes are fixed into bundles through clamps, parts such as heat insulation materials are wrapped outside the steam connecting pipe bundles, and the whole structure is completely different from that of the pressurized water reactor steam generator. Considering that the steam generator needs to undergo processes of vertical assembly, horizontal transportation and storage, vertical lifting, installation and the like in the self-manufacturing stage, the possibility of loosening of parts in the equipment exists, and since partial region personnel cannot enter after the equipment is assembled, whether the internal parts of the steam generator are loosened or not needs to be monitored by technical means.

The design of the high-temperature gas cooled reactor does not consider any vibration or sound measurement on a primary loop system (including a steam generator), and personnel cannot be arranged to carry out local vibration or sound measurement during debugging due to the risk control, cabin environment and the like, so that a set of vibration or sound measurement system capable of realizing remote transmission is required to be developed.

Disclosure of Invention

The present disclosure is directed to at least one of the technical problems of the prior art, and provides an apparatus and a method for monitoring sound during debugging of a steam generator of a high temperature gas cooled reactor.

In one aspect of the present disclosure, an acoustic monitoring device for debugging a high temperature gas cooled reactor steam generator is provided, the acoustic monitoring device comprising a control module and a plurality of audio acquisition modules;

the control module is electrically connected with the plurality of audio acquisition modules, and the plurality of audio acquisition modules are respectively arranged on a plurality of flange joint surfaces of the steam generator and one side of the cylinder;

the audio acquisition module is used for acquiring audio signals at the joint surfaces of the flanges and the cylinder;

and the control module is used for determining the dislocation state of each flange joint surface and the loosening state of the internal components of the cylinder according to the audio signals.

In some embodiments, the control module, configured to determine, according to the audio signal, a dislocated state of each of the flange engagement surfaces and a released state of the barrel inner member, includes:

the control module is specifically configured to:

comparing the sound intensity value of the current audio signal with a preset alarm sound intensity threshold value, and outputting an alarm if the sound intensity value exceeds the alarm sound intensity threshold value; and the number of the first and second electrodes,

if the current audio signal is a single wave crest in a short time, the peak value sound intensity value is high, and the background noise energy is restored to the state before alarming after alarming, determining that the flange joint surface corresponding to the current audio signal has a dislocation phenomenon;

and if the current audio signal is a continuous or discontinuous continuous sound, the peak sound intensity value is low, and the background noise after the alarm is obviously higher than the state before the alarm, determining that the internal component of the cylinder is loosened.

In some embodiments, after determining that the flange joint surface corresponding to the current audio signal has a slip phenomenon, the control module is further configured to determine an abnormal flange sound position according to the current audio signal.

In some embodiments, four audio acquisition modules are arranged at the flange joint surface corresponding to the current audio signal, and the four audio acquisition modules are arranged in a matrix;

the control module is further configured to determine an abnormal flange sound position according to the current audio signal, and includes:

acquiring a first sound intensity difference of two audio acquisition modules in a first matrix direction arranged in a matrix;

acquiring a second sound intensity difference of two audio acquisition modules in a second matrix direction in matrix arrangement;

and determining the abnormal flange sound position according to the first sound intensity difference and the second sound intensity difference.

In some embodiments, the sound monitoring device further comprises a recording module electrically connected to the audio acquisition module for recording and storing the audio signal.

In some embodiments, the audio capture module employs a microphone.

In some embodiments, the flange interface includes a fan case top cap flange interface, a fan case barrel lower flange interface, and a steam generator barrel flange interface.

In another aspect of the present disclosure, there is provided a sound monitoring method for debugging a steam generator of a high temperature gas cooled reactor, the method including:

collecting audio signals of each flange joint surface and the barrel of the steam generator;

and determining the dislocation state of the joint surfaces of the flanges and the loosening state of the internal components of the cylinder according to the audio signals.

In some embodiments, the determining the dislocation state of each flange joint surface and the loosening state of the barrel inner member according to the audio signal includes:

comparing the sound intensity value of the current audio signal with a preset alarm sound intensity threshold value, and outputting an alarm if the sound intensity value exceeds the alarm sound intensity threshold value; and the number of the first and second electrodes,

if the current audio signal is a single wave crest in a short time, the peak value sound intensity value is high, and the background noise energy is restored to the state before alarming after alarming, determining that the flange joint surface corresponding to the current audio signal has a dislocation phenomenon;

and if the current audio signal is a continuous or discontinuous continuous sound, the peak sound intensity value is low, and the background noise after the alarm is obviously higher than the state before the alarm, determining that the internal component of the cylinder is loosened.

In some embodiments, after determining that the flange joint surface corresponding to the current audio signal has a slip phenomenon, the method further includes:

determining the abnormal flange sound position according to the audio signal, specifically:

acquiring a first sound intensity difference in a first matrix direction;

acquiring a second sound intensity difference in a second matrix direction;

and determining the abnormal flange sound position according to the first sound intensity difference and the second sound intensity difference.

According to the sound monitoring device and method for debugging the high-temperature gas cooled reactor steam generator, the plurality of audio acquisition modules are arranged on the plurality of flange joint surfaces and one side of the barrel of the steam generator, and the dislocation state of each flange joint surface and the loosening state of the barrel internal component are determined by using audio signals acquired by the audio acquisition modules, so that the steam generator can be comprehensively monitored in a sound mode, and the phenomena of dislocation between the flange surfaces of a steam generator shell and loosening of the steam generator internal component in a debugging period are effectively monitored.

Drawings

Fig. 1 is a schematic structural view of an acoustic monitoring device for debugging a steam generator of a high temperature gas cooled reactor according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram illustrating the distribution of audio acquisition modules on a steam generator of a high temperature gas cooled reactor according to another embodiment of the present disclosure.

Detailed Description

For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

As shown in fig. 1 and fig. 2, an embodiment of the present disclosure relates to an acoustic monitoring apparatus 100 for debugging a steam generator of a high temperature gas cooled reactor, where the acoustic monitoring apparatus 100 includes a control module 110 and a plurality of audio acquisition modules 120. The control module 110 is electrically connected to the plurality of audio capture modules 120. The plurality of audio collection modules 120 are respectively disposed at the plurality of flanged joint surfaces 210 and the side of the barrel 220 of the steam generator 200. The audio acquisition module 120 is configured to acquire audio signals at the flange joint surfaces 210 and the cylinder 220. The control module 110 is configured to determine a dislocation state of each flange joint surface 210 and a loose state of the barrel internal member according to the audio signal.

Specifically, as shown in fig. 2, the flange joint surface 210 may include a fan casing top cover flange joint surface 211, a fan casing cylinder lower flange joint surface 212, and a steam generator cylinder flange joint surface 213, two audio acquisition modules 120 may be disposed in the circumferential direction of the fan casing top cover flange joint surface 211, two audio acquisition modules 120 may be disposed in the circumferential direction of the fan casing cylinder lower flange joint surface 212, four audio acquisition modules 120 may be disposed in the circumferential direction of the steam generator cylinder flange joint surface 213, and a plurality of audio acquisition modules 120 are disposed at the same flange surface position, so as to prevent data loss caused by accidental failure of one audio acquisition module 120 in the use process, and attempt to preliminarily determine the position of sound through the matrix principle.

The sound monitoring device of this embodiment sets up a plurality of audio acquisition modules through a plurality of flange faying faces and barrel one side at steam generator, utilizes the audio signal that audio acquisition module gathered to confirm each the dislocation state of flange faying face, and the pine of barrel internals state to can carry out comprehensive sound control to steam generator, realize the effective control of debugging period to steam generator shell flange inter-face dislocation phenomenon, steam generator internals pine phenomenon.

Illustratively, as shown in fig. 1, the control module 110 is specifically configured to:

and comparing the sound intensity value of the current audio signal with a preset alarm sound intensity threshold (a sound intensity value slightly higher than a local noise value can be selected as the alarm sound intensity threshold), and outputting an alarm if the sound intensity value exceeds the alarm sound intensity threshold. And if the current audio signal is a single wave crest in a short time, the peak value sound intensity value is high, and the background noise can be restored to the state before alarming after alarming, determining that the flange joint surface corresponding to the current audio signal has the phenomenon of dislocation. And if the current audio signal is a continuous or discontinuous continuous sound, the peak sound intensity value is low, and the background noise after the alarm is obviously higher than the state before the alarm, determining that the internal component of the cylinder is loosened.

For example, after determining that the flange joint surface corresponding to the current audio signal has a slip phenomenon, the control module 110 is further configured to determine an abnormal flange sound position according to the current audio signal.

Specifically, as shown in fig. 2, four audio acquisition modules 120 are circumferentially arranged on the steam generator cylinder flange joint surface 213, and the four audio acquisition modules 120 are arranged in a matrix. The control module 110 is configured to obtain a first sound intensity difference between two audio capture modules 120 in a first matrix direction (e.g., a transverse direction in fig. 2) arranged in a matrix, and obtain a second sound intensity difference between two audio capture modules 120 in a second matrix direction (e.g., a longitudinal direction in fig. 2) arranged in a matrix, and determine the abnormal flange sound position according to the first sound intensity difference and the second sound intensity difference.

Illustratively, as shown in fig. 1, the sound monitoring apparatus 100 further includes a recording module 130, and the recording module 130 is electrically connected to the audio acquisition module 120 to record and store the audio signal.

Specifically, the audio capture module 120 may employ a microphone. The effective pick-up distance of the sound pick-up is 1.5 meters, the audio transmission distance is not less than 1 kilometer, the frequency range is 20Hz to more than 1kHz, and the power supply is DC 12V (can be supplied by the recording module 130). The recording module 130 may be a network recorder, and according to the number of the pickups of the steam generator of the high temperature gas cooled reactor, the network recorder selects an audio server with 16 recording channels, and the network recorder and the pickups are connected by three-core wires, which are respectively audio transmission, a power supply positive electrode, and a common ground. The network recorder adopts AC 220V power supply to supply power, and can realize the functions of audio signal storage and sound control recording. The control module 110 may be recording monitoring software provided in a notebook computer, a desktop computer, or the like, and the recording monitoring software includes the following functional modules: the working computer is communicated with the network recorder, and has the function of checking the state of a sound monitoring system consisting of the network recorder and a sound pick-up; real-time display function (decibel value) of the pickup feedback signal; the time-sharing query and play functions of the recording information; setting high-decibel signal reminding, alarming function and the like.

In one particular example, each pickup is temporarily secured to an adjacent item outside of the steam generator housing using a tie wrap. The adapter is qualified for the next round of competitions and includes: 12V power input line (red), audio output line (yellow), ground line (black). The adapter outgoing line is connected with a wiring terminal on the back of the network recording host which is led out of a manhole of a cabin of the steam generator after being connected with a temporary cable. The network recording host computer needs to take 220V electricity from the reactor ring corridor socket box as a power supply. One network cable is connected to any one of two network cable interfaces on the back of the network recording host computer and led to a 7.5m inlet of the nuclear auxiliary plant to be connected with a working computer for monitoring. And the recording monitoring software is used for checking the sound monitoring network to ensure that the channel is normal and no disconnection is caused for alarming. And putting into a recording monitoring system, measuring the background noise intensity of each measuring point, and setting recording monitoring software by taking the maximum fluctuation value +5dB of the background noise intensity as an initial alarm value. Under the debugging working conditions of a loop pressure test, a helium main fan function test and the like, a recording monitoring system is used for recording and counting the audio characteristics of the high-temperature gas cooled reactor steam generator such as the size and the duration of abnormal sound, and the reason and the rule of the abnormal sound of the steam generator are searched.

In some embodiments, another aspect of the present disclosure provides an acoustic monitoring method for debugging a high temperature gas cooled reactor steam generator, which may employ the acoustic monitoring apparatus described above, and the specific structure thereof is referred to the above related description and will not be described herein again. The method comprises the following steps:

and collecting audio signals of the joint surfaces of the flanges and the barrel of the steam generator.

And determining the dislocation state of the joint surfaces of the flanges and the loosening state of the internal components of the cylinder according to the audio signals.

According to the sound monitoring method, the audio signals of the plurality of flange joint surfaces and the barrel of the steam generator are collected, the dislocation state of each flange joint surface and the loosening state of the barrel internal component are determined according to the audio signals, so that the steam generator can be comprehensively monitored in a sound mode, and the phenomena of dislocation between the flange surfaces of the shell of the steam generator and loosening of the internal components of the steam generator in a debugging period are effectively monitored.

In some embodiments, the determining the dislocation state of each flange joint surface and the loosening state of the barrel inner member according to the audio signal includes:

comparing the sound intensity value of the current audio signal with a preset alarm sound intensity threshold value, and outputting an alarm if the sound intensity value exceeds the alarm sound intensity threshold value; and the number of the first and second electrodes,

if the current audio signal is a single wave crest in a short time, the peak value sound intensity value is high, and the background noise energy is restored to the state before alarming after alarming, determining that the flange joint surface corresponding to the current audio signal has a dislocation phenomenon;

and if the current audio signal is a continuous or discontinuous continuous sound, the peak sound intensity value is low, and the background noise after the alarm is obviously higher than the state before the alarm, determining that the internal component of the cylinder is loosened.

In some embodiments, after determining that the flange joint surface corresponding to the current audio signal has a slip phenomenon, the method further includes:

determining the abnormal flange sound position according to the audio signal, specifically:

acquiring a first sound intensity difference in a first matrix direction;

acquiring a second sound intensity difference in a second matrix direction;

and determining the abnormal flange sound position according to the first sound intensity difference and the second sound intensity difference.

It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.