Noise testing device for steam release isolating valve

Abstract

The invention discloses a noise testing device for a steam release isolating valve, and relates to the technical field of noise testing. In order to solve the technical problems that in the prior art, an existing single-point sound level sensor cannot collect noise data in an omnibearing mode, so that the accuracy of a monitoring result is limited, and the mode of manually arranging the sensor is inaccurate in angle and is not on the same monitoring surface, the invention provides a sound level sensor. According to the technical scheme provided by the invention, the noise testing device for the steam release isolating valve comprises a steam pipeline and a noise monitoring device arranged around the steam release isolating valve on the steam pipeline, the noise monitoring device comprises a rotating frame, and the rotating frame comprises a partial circular ring part and supporting parts connected to the two ends of the partial circular ring part. One end of the supporting part is connected to the supporting seat; and the at least three sound level sensors are uniformly arranged on part of the circular ring part. The center point of the noise monitoring device is located on the axis of the steam release isolation valve. The noise testing device is suitable for noise testing of the steam release isolating valve.

Description

Technical Field

[0001] The invention relates to the technical field of noise testing, and in particular to noise testing of a steam release isolation valve. Background Art

[0002] Steam release isolation valve is one of the important safety devices widely used in industrial equipment such as nuclear power plants. It is usually used to prevent overpressure in the secondary circuit main steam system. The valve consists of an electromagnetic pilot valve and a main valve, and relies on the action of the internal spring of the main valve to achieve sealing and return to the seat. However, during the opening and closing process of the valve, due to the high-speed release of steam, huge noise is easily generated. These noises may cause a series of problems, including pollution of the equipment use environment, resonance of pressure vessels and pipelines, and acoustic fatigue, which seriously affect the service life of the system and pose a potential threat to the health of operators. Therefore, studying the characteristics of the noise of the steam release isolation valve and its effective monitoring methods is of great practical significance for ensuring the safe operation of the valve.

[0003] The existing valve noise testing method generally monitors the noise by installing a sound level sensor 1 meter behind the valve outlet. However, since the steam release isolation valve noise has obvious directionality, a single sensor often cannot accurately collect noise data in all directions. Therefore, relevant researchers have designed a noise collection matrix, which enhances the understanding and analysis of noise directionality by arranging multiple sound level sensors at different positions around the valve.

[0004] Although the noise collection matrix can provide relatively comprehensive noise data, its implementation process faces many challenges. For example, the common method of arranging circular monitoring points requires arranging sensors in a circle 1 meter from the valve outlet, with a monitoring point set every 30° on the circumference to ensure effective noise collection in a specific area of ​​the valve. However, in actual operation, the arrangement process of sound level sensors is easily affected by various factors, such as inaccurate angular position, complex changes in the monitoring surface, insufficient number of sensors, etc., which leads to a decrease in the accuracy and efficiency of noise data collection. In addition, when the monitoring surface needs to be switched, the traditional arrangement method often requires manual re-adjustment of the sensor position, which is a complex and error-prone process, increasing the difficulty and cost of monitoring.

[0005] In summary, in the prior art, due to the strong directionality of noise, traditional single-point sound level sensors are unable to collect noise data in all directions, resulting in the accuracy of the monitoring results being limited. At the same time, during the switching of monitoring points, the manual arrangement of sensors has problems such as inaccurate angles and not being on the same monitoring surface, making it difficult to achieve high efficiency and consistency in data collection. In addition, factors such as the complex arrangement of monitoring points and the difficulty of manual adjustment also lead to high testing costs, affecting the application and popularization of valve noise monitoring in industrial environments. Therefore, there is a need for a noise testing device and method that can achieve precise arrangement of sound level sensors, facilitate switching of monitoring surfaces, and effectively reduce monitoring costs, so as to overcome the deficiencies in the prior art and improve the accuracy and efficiency of noise data collection. Summary of the invention

[0006] In order to solve the technical problems in the prior art that the existing single-point sound level sensor cannot collect noise data in all directions, resulting in the accuracy of the monitoring results being limited, and in the process of switching the monitoring points, the manual arrangement of sensors has inaccurate angles and is not on the same monitoring surface, the technical solution provided by the present invention is:

[0007] A noise monitoring device for a steam release isolation valve, comprising:

[0008] A rotating frame, the rotating frame comprising a partial annular portion and supporting portions respectively connected to two ends of the partial annular portion;

[0009] One end of the support portion away from the partial annular portion is connected to the support seat;

[0010] At least three sound level sensors are evenly arranged on the partial annular portion.

[0011] Furthermore, a preferred embodiment is provided, wherein the partial annular portion is half of a circular ring.

[0012] Furthermore, a preferred embodiment is provided, wherein the support seat can drive the monitoring device to rotate along a rotation axis, and the rotation axis is a symmetry axis of the support portion.

[0013] Furthermore, a preferred embodiment is provided, wherein there are seven sound level sensors.

[0014] Based on the same inventive concept, the present invention also provides a noise testing device for a steam release isolation valve, comprising:

[0015] Steam pipeline, and a steam release isolation valve arranged around the steam pipeline

[0016] The noise monitoring device;

[0017] The center point of the noise monitoring device is located on the axis of the steam release isolation valve.

[0018] Furthermore, a preferred embodiment is provided, wherein the steam pipeline includes a gas supply device and a supporting structure.

[0019] Furthermore, a preferred embodiment is provided, wherein the support structure is 0.5 m from the ground.

[0020] Based on the same inventive concept, the present invention also provides a noise testing method for a steam release isolation valve, which is implemented based on the testing device and includes:

[0021] The step of collecting the sound level sensor signal one;

[0022] Steps to send rotation instructions;

[0023] The step of collecting the second signal of the sound level sensor;

[0024] The steps of amplifying and weighting the collected sound level sensor signal.

[0025] Based on the same inventive concept, the present invention also provides a computer storage medium for storing a computer program. When the computer program is read by a computer, the computer executes the method described.

[0026] Based on the same inventive concept, the present invention also provides a computer, including a processor and a storage medium. When the processor reads a computer program stored in the storage medium, the computer executes the method described.

[0027] Compared with the prior art, the technical solution provided by the present invention is beneficial in that:

[0028] By installing the sound level on a rotating frame, the accuracy of the sensor's monitoring noise points is ensured, and dynamic switching of the monitoring surface is achieved, which greatly improves the accuracy and efficiency of noise testing. Compared with the traditional single-position layout, it can collect noise data more comprehensively and avoid errors caused by inaccurate angle position.

[0029] The use of the rotating bracket allows the noise monitoring points to be distributed within the same circular surface, avoiding the test steps caused by inaccurate positions during manual installation. In addition, through the design of the rotating bracket, the monitoring aspect can be switched without re-adjusting the monitoring point, saving the time cost of manual adjustment and rearrangement, and improving the monitoring efficiency and accuracy.

[0030] The design height of the pipe support frame in this device is 0.5 meters, which not only reduces the interference of system vibration on data testing, but also effectively reduces the impact of ground rebound noise, thereby improving the accuracy of noise measurement. This is different from the height used in other studies and can better balance system stability and data acquisition accuracy.

[0031] Through the cooperation of the data acquisition system, the noise data acquisition card and the signal transmitter, real-time monitoring and visual processing of various data are realized. Compared with the traditional single sensor acquisition, this system integration method can effectively improve the accuracy of data acquisition, and can simultaneously analyze important factors that affect noise, such as pressure, temperature, flow, etc., and provide comprehensive test data and analysis basis.

[0032] Suitable for use in noise testing of steam release isolation valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a noise testing device for a steam release isolation valve;

[0034] Figure 2 This is a view of the noise monitoring device along the axial direction of the pipeline;

[0035] Figure 3 It is the connection diagram of the data acquisition system;

[0036] Figure 4 It is a schematic diagram of the spectrum characteristics of the monitoring point;

[0037] Figure 5 It is the A-weighted octave curve of the noise monitoring point;

[0038] Figure 6 It is the radar map of each axial monitoring point;

[0039] Figure 7 This is a radar map of each circumferential monitoring point.

[0040] Among them, 1-air compressor; 2-hose; 3-high-pressure tank; 4-ball valve A; 5-muffler A; 6-flow sensor A; 7-vibration acceleration sensor A; 8-temperature sensor A; 9-pressure sensor A; 10-tested valve; 11-temperature sensor B; 12-vibration acceleration sensor B; 13-pressure sensor B; 14-pipeline; 15-sound level sensor; 16-rotating bracket; 17-muffler B; 18-ball valve B; 19-low-pressure tank; 20-base; 21-support frame; 22-noise data acquisition card; 23-signal amplifier; 24-host computer. DETAILED DESCRIPTION

[0041] In order to make the advantages and benefits of the technical solution provided by the present invention more clearly reflected, the technical solution provided by the present invention is now further described in detail with reference to the accompanying drawings, specifically:

[0042] Embodiment 1: This embodiment provides a noise monitoring device for a steam release isolation valve, comprising:

[0043] A rotating frame, the rotating frame comprising a partial annular portion and supporting portions respectively connected to two ends of the partial annular portion;

[0044] One end of the support portion away from the partial annular portion is connected to the support seat;

[0045] At least three sound level sensors 15 are evenly arranged on the partial annular portion.

[0046] Embodiment 2: This embodiment further limits the noise monitoring device for a steam release isolation valve provided in Embodiment 1, wherein the partial annular portion is half of the annular ring.

[0047] Embodiment 3: This embodiment further limits the noise monitoring device for a steam release isolation valve provided in embodiment 1. The support seat can drive the monitoring device to rotate along the rotating shaft, and the rotating shaft is the symmetry axis of the support portion.

[0048] Embodiment 4: This embodiment further limits the noise monitoring device for a steam release isolation valve provided in Embodiment 1, and there are seven sound level sensors 15 .

[0049] Embodiment 5: This embodiment provides a noise testing device for a steam release isolation valve, comprising:

[0050] A steam pipeline, and a noise monitoring device provided in embodiment 1 arranged around a steam release isolation valve on the steam pipeline;

[0051] The center point of the noise monitoring device is located on the axis of the steam release isolation valve.

[0052] Embodiment 6: This embodiment further limits the noise testing device for a steam release isolation valve provided in Embodiment 5, wherein the steam pipeline includes an air supply device and a supporting structure.

[0053] Embodiment 7: This embodiment further limits the noise testing device for a steam release isolation valve provided in Embodiment 6, wherein the support structure is 0.5 m away from the ground.

[0054] Specifically, the device includes:

[0055] Air supply device (including air compressor 1, high-pressure tank 3, ball valve A4, transmission pipeline 14, ball valve B18, low-pressure tank 19)

[0056] Flow monitoring device (flow sensor A6)

[0057] Pressure monitoring device (pressure sensor A9, pressure sensor B13)

[0058] Temperature monitoring device (temperature sensor A8, temperature sensor B11)

[0059] Noise monitoring device (sound level sensor 15, rotating frame, noise data acquisition card 22)

[0060] Vibration acceleration sensor A7, vibration acceleration sensor B12

[0061] Data acquisition system (noise data acquisition card 22, signal amplifier 23, host computer 24)

[0062] Functions of the supporting structure (base 20, support frame 21, muffler A5, muffler B17, pipe 14):

[0063] Air supply device:

[0064] Air compressor 1: Provides sufficient air source for high-pressure tank 3 to ensure stable air supply pressure and avoid noise data distortion caused by air pressure fluctuations.

[0065] High-pressure tank 3: stably provides the required medium pressure to ensure the continuity of the test.

[0066] Ball valve A4 and ball valve B18: used to adjust gas flow and pressure to meet test requirements.

[0067] Low-pressure tank 19: used to stabilize the supply of low-pressure gas source to further ensure the accuracy of the test.

[0068] Flow monitoring device:

[0069] Flow sensor: used to monitor the gas flow through the main valve of the steam release isolation valve in real time to ensure the accuracy of the collected flow data.

[0070] Pressure monitoring device:

[0071] Pressure sensor A9: Located in front of the valve 10 to be tested, used to measure the pressure of the medium before entering the valve.

[0072] Pressure sensor B13: located behind the valve 10 to be tested, used to measure the pressure of the medium flowing through the valve, so as to analyze the relationship between the pressure before and after the valve and the noise.

[0073] Temperature monitoring device:

[0074] Temperature sensor A8: located in front of the valve 10 to be tested, used to measure the temperature of the medium before entering the valve.

[0075] Temperature sensor B11: located behind the valve 10 under test, used to measure the temperature of the medium flowing through the valve in order to analyze the influence of temperature on noise characteristics.

[0076] Noise monitoring device:

[0077] Sound level sensor 15: used to monitor the intensity and directionality of valve noise.

[0078] Rotating frame: used to install the sound level sensor 15, and realize the position change of the monitoring point by rotation, so as to measure the noise in different directions.

[0079] Noise data acquisition card 22: responsible for collecting data from the sound level sensor 15 and transmitting it to the data acquisition system.

[0080] Data Acquisition System:

[0081] Noise data acquisition card 22: connected to each sound level sensor 15 to ensure accurate data collection.

[0082] Signal amplifier 23: amplifies the monitoring signal to ensure the accuracy of data collection.

[0083] Host computer 24: responsible for visualizing and storing the collected data for subsequent analysis and processing.

[0084] Support structure:

[0085] The base 20 and the support frame 21 provide stable support for the device to prevent shaking of the device and interference of noise data during the test.

[0086] Muffler A5 and muffler B17: used to reduce noise interference in the pipe 14 before and after the valve to ensure that the collected noise data is purer.

[0087] Pipeline 14: used to connect various components to ensure the normal flow of gas.

[0089] The gas supply device transmits the compressed gas to the flow monitoring device through the transmission pipeline 14, and controls the flow and pressure of the gas through the adjustment of the ball valve to ensure the stability of the gas supply.

[0090] The air compressor 1 and the high-pressure tank 3 are connected via a hose 2 .

[0091] The flow monitoring device works together with the pressure monitoring device and the temperature monitoring device to monitor the flow, pressure and temperature of the gas flowing through the steam release isolation valve in real time, and transmit these data to the data acquisition system.

[0092] The noise monitoring device accurately arranges the sound level sensor 15 through a rotating frame to ensure that complete noise data can be collected at different positions, and transmits the data to the host computer 24 through the noise data acquisition card 22.

[0093] The data acquisition system performs real-time visual processing and storage of all monitoring data through the host computer 24, making it easier for the operator to understand the real-time status of the experiment and providing support for subsequent data analysis.

[0094] The supporting structure ensures the stability of the entire device. The base 20 and the supporting frame 21 are used to reduce the influence of vibration on the test results. The muffler is used to reduce the background noise interference in the pipeline 14.

[0095] in addition:

[0096] During the test, the gas supply device provides a stable gas source, the flow monitoring device, pressure monitoring device and temperature monitoring device monitor various gas parameters respectively, and the noise monitoring device collects valve noise through the precisely arranged sound level sensor 15. All collected data are processed and stored by the data acquisition system, and the support structure ensures the stability of the entire system during the test and reduces the impact of external interference on the test results. The synergy of each part ensures the accurate collection of noise data and the smooth progress of the experiment.

[0097] Embodiment 8: This embodiment provides a noise testing method for a steam release isolation valve, which is implemented based on the testing device provided in Embodiment 5 and includes:

[0098] The step of collecting the signal of the sound level sensor 15;

[0099] Steps to send rotation instructions;

[0100] The step of collecting the second signal of the sound level sensor 15;

[0101] The step of amplifying and weighting the collected signal of the sound level sensor 15.

[0102] Embodiment 9: This embodiment provides a computer storage medium for storing a computer program. When the computer program is read by a computer, the computer executes the method provided in embodiment 8.

[0103] Embodiment 10: This embodiment provides a computer, including a processor and a storage medium. When the processor reads a computer program stored in the storage medium, the computer executes the method provided in embodiment 8.

[0104] Implementation Method XI: Combination Figure 1-3 This embodiment is described in detail by using specific examples to further describe the technical solution provided above. Specifically:

[0105] A test device for noise monitoring of steam release isolation valves is used to monitor the noise characteristics of valves under different air pressures and different valve openings. The gas supply device, flow monitoring device, pressure monitoring device, temperature monitoring device, noise monitoring device, data acquisition system and other devices are specifically as follows:

[0106] The air supply device includes an air compressor 1, a high-pressure tank 3, a ball valve A4, a transmission pipeline 14, a ball valve B18, a low-pressure tank 19, etc. The air compressor 1 is used to provide sufficient air source for the high-pressure tank 3 to reduce the possibility of noise data distortion caused by unstable air source pressure. The high-pressure tank 3 can stably provide medium pressure, and the ball valve A44 can adjust the inlet flow of the valve system, which can be regulated according to actual requirements. The spring-loaded safety valve 17 is used to ensure that the ball valve opening can be set when necessary to increase the valve back pressure.

[0107] The flow monitoring device is realized by monitoring through a flow sensor, and the transmission pipeline 14 is connected to monitor the flow of the steam release isolation valve main valve in real time. After the flow monitoring sensor is connected to the muffler A5, the flow data of the gas before the measured valve 10 can be more accurately measured after the rectification effect of the muffler. The data collected by the flow sensor is connected to the host computer 24 for communication.

[0108] The pressure monitoring device is realized by monitoring through a pressure sensor, and the transmission pipeline 14 is connected to monitor the medium pressure flowing into the main valve of the steam release isolation valve in real time. The pressure sensor A9 is located before the valve 10 under test and after the flow sensor. The pressure sensor B13 is located after the valve 10 under test, and measures the pressure of the gas flowing before and after the valve 10 under test, respectively, so as to facilitate the analysis of the relationship between the valve noise and the pressure before and after the valve.

[0109] The temperature monitoring device is connected to the transmission pipeline 14 through the temperature sensor, and monitors the temperature of the medium flowing into the main valve of the steam release isolation valve in real time. The temperature sensor A8 is located before the valve 10 to be tested and after the flow sensor. The temperature sensor B11 is located after the valve 10 to be tested. Since the temperature of the gas will change under compression, the above two temperature sensors respectively measure the temperature of the gas before and after the valve 10 to be tested, which is convenient for analyzing the relationship between valve noise and medium temperature.

[0110] The noise monitoring device is implemented by a sound level sensor 15, a rotating frame, and a data acquisition system to monitor the noise generated by the main valve of the steam release isolation valve in the cross section in real time. The sound level sensor 15 can be fixed on the monitoring point on the rotating frame. When the rotating frame and the pipeline 14 are in the same plane, the axial noise characteristics of the valve noise can be measured. At this time, the rotating frame is rotated 90° and is perpendicular to the pipeline 14. At this time, the circumferential noise characteristics of the valve noise can be measured. Each sound level sensor 15 is connected to a noise data acquisition card 22. The data is transmitted to the host computer 24 through the communication connection via the noise data acquisition card 22 for visualization and storage.

[0111] The data acquisition system is composed of various sensors, a noise data acquisition card 22, a signal amplifier 23, a host computer 24, etc. It can visualize the data collected by each sensor and store the data to facilitate subsequent analysis and processing of the data. Each sensor is mainly responsible for data acquisition, and a suitable model with less impact on the flow field is selected; the noise data acquisition card 22 is connected to each sound level sensor 15 to ensure accurate data collection; the signal amplifier 23 is connected to each sensor on the pipeline 14 to amplify the monitoring data to ensure the accuracy of data collection. The host computer 24 is mainly responsible for data visualization, real-time monitoring of various data of valves and media, which is convenient for the operator's control and processing, and stores data for subsequent data analysis and processing.

[0112] The other devices are composed of a base 20, a support frame 21, a muffler, and a pipe 14, which ensure the stability of the system under test and prevent the noise data from being collected incorrectly due to vibration. The base 20 is made of cast iron and is designed as an inverted trapezoidal groove in the middle. The main function is to provide a fixed position for the support frame 21 to prevent the support frame 21 from tilting. The function of the support frame 21 is to support the system under test. The upper support part is mainly connected to the pipe 14 to prevent the gas from vibrating violently after flowing through the pipe 14. Considering that the support frame 21 is too high, it is easier to shake. If it is too low, the valve 10 under test will be too close to the ground, which is prone to inaccurate noise data. Therefore, by analyzing the noise attenuation characteristics (about 30dB attenuation within 0-0.5m, 3dB attenuation within 0.5m-1m, and 2dB attenuation within 1-1.5m), the height of the support frame 21 is selected to be 0.5m; the function of the muffler A5 is to isolate the noise in the pipe before the valve 10 under test, and to perform rectification to ensure the stability of the fluid state before the valve 10 under test. The function of the muffler B17 is to interfere with the sound level sensor 15 by the noise generated by the gas behind the valve, resulting in inaccurate measured data.

[0113] The arrangement of various sensors enables noise testing under various working conditions.

[0114] Test methods, including:

[0115] The first step is to start the system by starting the air compressor 1, raising the air pressure of the high-pressure tank 3 to the specified pressure, and then shutting down the air compressor 1.

[0116] The second step is to set the position of the noise monitoring point according to the demand, the position of the rotating frame and the opening of the valve 10 to be tested, and check whether there is leakage in each pipeline 14 and whether the circuit connection is normal.

[0117] The third step is to open the ball valve, and the gas storage tank starts to transport gas out. The gas flows through the muffler A5 and is rectified. Various sensors start to collect data, and then transmit the data to the host computer 24 through the data acquisition system for visualization, and record the test data in real time.

[0118] Step 4: If it is necessary to measure the noise characteristics of the valve in another direction, the rotating frame can be rotated to change the position of the monitoring point and measure the data.

[0119] Specific:

[0120] The valve is opened to a specified opening, the high-pressure tank 3 is filled with gas to 0.4 MPa, and after confirming that the sound level sensor 15 is working normally, the ball valve 4 is opened, and the sensor data are recorded at the same time. In this embodiment, the test duration is 12 seconds, and the data processing is as follows.

[0121] Preprocessing:

[0122] The moment when the sensor collects data is recorded as 0s. Through simulation analysis, the smooth stabilization time inside the pipeline 14 is generally less than 2s. In this case, the data of the last 10s are analyzed. When the data of the temperature sensor, vibration acceleration sensor, and pressure sensor are within the experimental design range, the noise data collected by the sound level sensor 15 is valid data and can be processed in the next step.

[0123] Further processing:

[0124] The noise data of the sound level sensor 15 is directly connected to the host computer 24 through a communication connection. The host computer 24 processes the data through Labview software, summarizes the collected sound pressure level signals according to the monitoring points, stores them in a table file in the form of a table, and displays them in the form of a line graph. The mechanical noise of the valve is mainly 0-1500Hz, and the erosion noise is mainly 1000-8000Hz. Therefore, the noise data with a noise frequency range of 0-8000Hz is taken. The spectrum characteristics are drawn according to the acquired noise data, such as Figure 4 shown.

[0125] Since A-weighting (with 40dB as the benchmark and 0dB axis) is applicable to the measurement of any environmental noise, it is also often used to evaluate the degree of harm of noise to human hearing health. The noise data obtained is A-weighted, and the relationship between A-weighted response and center frequency is shown in Table 1.

[0126] Table 1 A-weighted response and frequency relationship

[0127] Center frequency Hz A weighting value a(dB) Measurement value b(dB) Weighted measurement value L(dB) 125 -16.1 104.11 88.01 250 -8.6 111.86 103.26 500 -3.2 113.05 109.85 1000 0 115.66 115.66 2000 1.2 118.31 119.51 4000 1 114.07 115.07 8000 -1.1 102.13 101.03

[0128] The calculation method of the A-weighted sound pressure level of noise at each center frequency is as follows:

[0129] L=a+b (1)

[0131] Where: L is the weighted measurement value; a is the weighted value of A; b is the test measurement value.

[0132]

[0133] Where: L A is the A-weighted sound pressure; n is the number of weighted measured values; L i is the i-th weighted measurement value.

[0134] The A-weighted octave curve of the noise monitoring point is obtained by A-weighting, and the curve is plotted as follows: Figure 5 shown.

[0135] Processing results:

[0136] The A-weighted sound pressure level of the monitoring point is calculated to be 122.34 dB. The same method is used to calculate the sound pressure level of each monitoring point to obtain the A-weighted sound pressure level of each monitoring point. The obtained sound pressure level data is stored in a table file. In order to facilitate noise analysis, it is drawn through a radar chart, as shown in Figure 6.

[0137] When it is necessary to obtain the noise characteristics of the valve circumference, rotate the rotating frame 90 degrees, perpendicular to the outflow direction of the medium, repeat the detection method and data processing method, and obtain the radar map of each monitoring point around the valve, such as Figure 7 shown.

[0138] Subsequent analysis:

[0139] Through data analysis, it can be obtained that the noise characteristics of the tested valve are as follows: (1) In the axial direction, the noise sound pressure level attenuation of each unit interval decreases as the distance from the valve increases; (2) In the circumferential direction, the noise of the tested valve has obvious directionality, and the sound pressure level in the direction perpendicular to the horizontal pipe is greater than the sound pressure level in the vertical direction, and it is elliptical in the cross section parallel to the rotating frame.

[0140] The technical solution provided by the present invention is further described in detail above through several specific implementation modes in order to highlight the advantages and benefits of the technical solution provided by the present invention. However, the several specific implementation modes described above are not intended to be used as limitations on the present invention. Any reasonable modification and improvement of the present invention, combination of implementation modes and equivalent substitution within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A noise monitoring device for a steam release isolation valve, characterized in that: include: A rotating frame, the rotating frame comprising a partial annular portion and supporting portions respectively connected to two ends of the partial annular portion; One end of the support portion away from the partial annular portion is connected to the support seat; At least three sound level sensors are evenly arranged on the partial annular portion.

2. A noise monitoring device for a steam release isolation valve according to claim 1, characterized in that: The partial annular portion is half of the annular ring.

3. A noise monitoring device for a steam release isolation valve according to claim 1, characterized in that: The support seat can drive the monitoring device to rotate along a rotation axis, and the rotation axis is the symmetry axis of the support portion.

4. A noise monitoring device for a steam release isolation valve according to claim 1, characterized in that: There are 7 sound level sensors.

5. A noise testing device for a steam release isolation valve, characterized in that: include: Steam pipeline, and a steam release isolation valve arranged around the steam pipeline The noise monitoring device according to claim 1; The center point of the noise monitoring device is located on the axis of the steam release isolation valve.

6. A noise testing device for a steam release isolation valve according to claim 5, characterized in that: The steam pipeline includes a gas supply device and a supporting structure.

7. A noise testing device for a steam release isolation valve according to claim 6, characterized in that: The support structure is 0.5m from the ground.

8. A noise testing method for a steam release isolation valve, characterized in that: The test device according to claim 5 is implemented as follows: The step of collecting the sound level sensor signal one; Steps to send rotation instructions; The step of collecting the second signal of the sound level sensor; The steps of amplifying and weighting the collected sound level sensor signal.

9. A computer storage medium for storing a computer program, characterized in that: When the computer program is read by a computer, the computer executes the method of claim 8.

10. A computer, comprising a processor and a storage medium, characterized in that: When the processor reads the computer program stored in the storage medium, the computer executes the method of claim 8 .

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