CN202994342U - Nuclear power plant bolt stress data collection device and detection device thereof - Google Patents
Nuclear power plant bolt stress data collection device and detection device thereof Download PDFInfo
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- CN202994342U CN202994342U CN 201220593555 CN201220593555U CN202994342U CN 202994342 U CN202994342 U CN 202994342U CN 201220593555 CN201220593555 CN 201220593555 CN 201220593555 U CN201220593555 U CN 201220593555U CN 202994342 U CN202994342 U CN 202994342U
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Abstract
The application is applied to the field of key technologies of mega-multikilowatt advanced pressurized water reactor nuclear power stations, and provides a data collection device and a bolt stress detection device for detecting bolt stress of a nuclear power plant. The bolt stress detection device comprises a data collection converter, a data processer and a data collection device; and the data collection device comprises a bolt tensioner, a hydraulic pump, a first collection unit, a second collection unit and a third collection unit. The first collection unit is used for collecting the tensile force data output by the bolt tensioner, the second collection unit is used for collecting tensile displacement data of the bolt tensioner, and the third collection unit is used for collecting ultrasonic data of the bolt tensioner; the data collection converter integrates the data collected by the data collection device into the data processor, the data processor processes the collected data and works out the bolt stress so as to complete the detection of the bolt residual stress, and according to the stress detection result, the bolt is analyzed, the residual pretightening force of the bolt is judged and a preventative maintenance policy is made.
Description
Technical field
The application relates to the kilowatt pressurized water reactor nuclear power station key technology area, particularly the unrelieved stress checkout equipment field of the set bolt of nuclear power station main equipment.
Background technology
The foot bolt of the main equipment in nuclear power station such as main pump, evaporator, trunk line etc. is the infrastructure that ensures main equipment and nuclear safety, needing regularly these bolts to be carried out stress detects, and according to the stress testing result, bolt is analyzed, the remaining pretightning force of judgement bolt, and make the preventative maintenance strategy.
Can utilize in the prior art pump fitted bolt stretcher to carry out fastening to bolt or dismounting, wherein bolt tensioning jack is the hydraulic power source that provides by fluid power booster (superpressure oil pump), determine tensile force according to tensile strength, yield factor and the length growth rate of material, the expansion force of utilizing superpressure oil pump to produce, the bolt of the power of being applied in is elongated in its elastic deformation area, diameter of bolt slight deformation, thereby make nut be easy to become flexible, also can be used as in addition the device that hydraulic pressure excessively full connection applies axial force, push up to press and install.Stretcher can make and the dismounting fastening by definite value simultaneously of a plurality of bolts, cloth power is even, be a safety, efficiently, instrument efficiently, be fastening and the optimal path of the bolt of dismounting all size, be widely used in the fields such as petrochemical complex, nuclear power, wind-powered electricity generation, water power, thermoelectricity, boats and ships, railway, Aero-Space, mining, heavy-duty machinery.But adopt pump fitted bolt stretcher only can carry out fastening or dismounting to bolt, can not detect field apparatus bolt unrelieved stress situation.
Can utilize the ultrasound wave bolt detector to detect bolt stress in prior art, but when adopting the ultrasound wave bolt detector to measure bolt pretightening, the original state that must measure in advance bolt could be measured the pretightning force of bolt afterwards, particularly, hyperacoustic oscillator is placed on a side of bolt and is used for generating a pulse, and this pulse is passed down through the whole length of bolt. and pulse is reflected back and pulse turns back on hyperacoustic oscillator at opposite side. and test cell is then measured the travel-time of signal.This action need first carries out under no load state in order to record reference length, in case securing member is fastened good, then repeats this operation, and the difference in the travel-time of securing member under idling and stress state is used to set up stress as a result.But, because the initial stage of installing of these main equipments in nuclear power station does not require bolt to carry out ultrasonic bolt detection pretightning force, so these bolts there is no the initial ultrasound measurement data, therefore, utilize the ultrasound wave bolt detector to detect bolt stress and have no idea to realize.
Summary of the invention
The application provides a kind of data collector for the detection of nuclear power station bolt stress and the bolt stress pick-up unit that uses this harvester.
According to the application's first aspect, the application provides a kind of data collector that detects for the nuclear power station bolt stress, comprises bolt tensioning jack and hydraulic pump, and described bolt tensioning jack has the bolt tension position, and described hydraulic pump is communicated with bolt tensioning jack, also comprises:
Be used for the first collecting unit of the tensile force data of collection bolt tensioning jack output, described the first collecting unit is arranged on the output channel of hydraulic pump;
The second collecting unit that is used for the stretching displacement data of collection tensile bolt, described the second collecting unit are positioned at top, bolt tension position;
Be used for gathering the 3rd collecting unit of tensile bolt ultrasound data, described the 3rd collecting unit is positioned at top, bolt tension position.
In a kind of more specifically embodiment, described the second collecting unit and the 3rd collecting unit are placed on top, bolt tension position side by side.
In a kind of more specifically embodiment, described the first collecting unit comprises the power sensor, and described power sensor is located on the pressure piping of hydraulic pump.
In a kind of more specifically embodiment, described the second collecting unit comprises displacement transducer.
In a kind of more specifically embodiment, described the 3rd collecting unit comprises ultrasonic sensor.
In a kind of more specifically embodiment, described bolt tensioning jack comprises support, piston cylinder, piston and draws mother, described piston cylinder is fixedly mounted on support, and be communicated with hydraulic pump, described piston is contained in piston cylinder slidably, the described mother of drawing is fixedly connected on piston, and draws and have the internal thread that coordinates with tensile bolt on mother.
In a kind of more specifically embodiment, also comprise the Data collecting conversion device, described the first collecting unit, the second collecting unit and the 3rd collecting unit all are connected with Data collecting conversion device signal.
In a kind of more specifically embodiment, pressure release section is set on the pressure piping of hydraulic pump.
In a kind of more specifically embodiment, described bolt tensioning jack adopts hydraulic elongator, single-stage automatically reset stretcher, multistage stretcher or the replaceable nut stretcher of automatically reseting.
In a kind of more specifically embodiment, described hydraulic pump adopts electric hydraulic pump, pneumatically powered hydraulic pump or hydraulic hand-pump.
According to the application's second aspect, the application provides a kind of nuclear power station bolt stress pick-up unit, comprising:
Data collector as described in above-mentioned any one embodiment;
Data collecting conversion device, described the first collecting unit, the second collecting unit and the 3rd collecting unit all are connected with Data collecting conversion device signal;
Be used for the data that collect are processed and calculated the data processor of bolt stress, described data processor is connected with Data collecting conversion device signal.
The application's beneficial effect is:
In the application, the data collector that is used for the detection of nuclear power station bolt stress can utilize the bolt tensioning jack tensile bolt, utilizes simultaneously the first collecting unit, the second collecting unit and the 3rd collecting unit to gather respectively the tensile force data of bolt tensioning jack, stretching displacement and the tensile bolt ultrasound data of tensile bolt.The Data Integration that in conjunction with the Data collecting conversion device in bolt stress pick-up unit in the application, data collector is collected again also is input in data processor, by data processor, bolt stress is processed and calculated to the data that collect, completing the bolt unrelieved stress detects, and according to the stress testing result, bolt is analyzed, the remaining pretightning force of judgement bolt, and make the preventative maintenance strategy.
Employing the application nuclear power station bolt stress pick-up unit can also stretch to the bolt that does not meet designing requirement, dismounting and change, and according to again stretch pretension and obtain quantitative data of standard, can accurately judge the fixing state that reaches the antidetonation bolt of nuclear power main equipment, this equipment can be in the situation that do not change the bolt band and carry, in the situation that lack the data such as length before bolted, stress, realize the judgement to the bolt unrelieved stress.On the other hand, stretching displacement and three groups of aggregation of data of tensile bolt ultrasound data by bolt tensioning jack tensile force data, tensile bolt are analyzed, can improve the accuracy that the remaining pretightning force of bolt is detected, reduce error, so that formulate more accurately preventive measure.
Description of drawings
Fig. 1 is the structural representation that the application is used for a kind of embodiment of data collector of nuclear power station bolt stress detection;
Fig. 2 is the structural representation that the application is used for a kind of embodiment bolt tensioning jack of data collector of nuclear power station bolt stress detection;
Fig. 3 is that the application is used for a kind of embodiment gauge stand of data collector structural representation that the nuclear power station bolt stress detects;
Fig. 4 is the structural representation of the another kind of embodiment of the application's nuclear power station bolt stress pick-up unit;
Fig. 5 is the step block diagram of calculation method for stress in a kind of embodiment of the application's nuclear power station bolt stress pick-up unit.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
In the embodiment of the present application, nuclear power station bolt stress pick-up unit comprises data collector, Data collecting conversion device and data processor.
This data collector comprises bolt tensioning jack, hydraulic pump, the first collecting unit, the second collecting unit and the 3rd collecting unit.This bolt tensioning jack has the bolt tension position, to tensile bolt (tensile bolt is and need to stretches and detect the bolt of unrelieved stress by bolt tensioning jack) when stretching tensile bolt be fixed in the bolt tension position.This hydraulic pump is communicated with bolt tensioning jack, for bolt tensioning jack provides stretching power.This first collecting unit is used for gathering the tensile force data of bolt tensioning jack output, and the second collecting unit is used for gathering the stretching displacement data of tensile bolt, and the 3rd collecting unit is used for gathering the tensile bolt ultrasound data.Wherein the first collecting unit is communicated with the pressure piping of hydraulic pump, and the second collecting unit and the 3rd collecting unit are positioned at top, bolt tension position.
The first collecting unit, the second collecting unit and the 3rd collecting unit all are connected with Data collecting conversion device signal, and the Data collecting conversion device is connected with the data processor signal.The tensile force data of the bolt tensioning jack output that is gathered respectively by the first collecting unit, the second collecting unit and the 3rd collecting unit, stretching displacement and the tensile bolt ultrasound data of tensile bolt are integrated and are transferred in data processor by the Data collecting conversion device, by data processor, bolt stress is processed and calculated to the data that collect, completing the bolt unrelieved stress detects, and according to the stress testing result, bolt is analyzed, the remaining pretightning force of judgement bolt, and make the preventative maintenance strategy.
Data collector and the bolt stress pick-up unit that adopts the application to be used for the detection of nuclear power station bolt stress can also stretch to the bolt that does not meet designing requirement, dismounting and change, and according to again stretch pretension and obtain quantitative data of standard, can accurately judge the fixing state that reaches the antidetonation bolt of nuclear power main equipment, this equipment can be in the situation that do not change the bolt band and carry, in the situation that lack the data such as length before bolted, stress, realize the judgement to the bolt unrelieved stress.On the other hand, stretching displacement and three groups of aggregation of data of tensile bolt ultrasound data by bolt tensioning jack tensile force data, tensile bolt are analyzed, can improve the accuracy that the remaining pretightning force of bolt is detected, reduce error, so that formulate more accurately preventive measure.
Below describe with specific embodiment.
Embodiment one:
Please refer to Fig. 1-3, the present embodiment one provides a kind of data collector for the detection of nuclear power station bolt stress, and it comprises bolt tensioning jack 1, hydraulic pump 2, the first collecting unit 3, the second collecting unit 4 and the 3rd collecting unit 5.
Only schematically show out bolt tensioning jack 1 in Fig. 1, wherein high-voltage tube 21 connects hydraulic pump 2 and bolt tensioning jack 1.Bolt tensioning jack 1 is the executive component of realizing bolt tension, and the concrete structure of this bolt tensioning jack 1 please refer to Fig. 2, and bolt tensioning jack 1 comprises support 11, piston cylinder 12, piston 13 and draws female 14.This support 11, piston cylinder 12, piston 13 and draw female 14 according to Standard shown in Fig. 2, the middle part of bolt tensioning jack 1 is the bolt tension position, be used for fixedly tensile bolt 9, particularly, the bolt tension position is that ladder is poroid, tensile bolt 9 heads are stuck on support 11, and its bar section stretches in this shoulder hole, wherein draws the internal thread that coordinates with tensile bolt 9 is set on female 14.
Piston cylinder 12 is fixedly mounted on support 11, and piston 13 slidably is loaded in piston cylinder 12, piston 13 middle part perforates, draw female 14 1 ends to be contained in the through hole at piston 13 middle parts, the other end is provided with boss, props up the end of piston 13, and tensile bolt 9 is spirally connected fixing with drawing the internal thread hole on female 14.
Have high pressure liquid interface 15 and power sensor interface 16 on piston cylinder 12.The high-voltage oil liquid of hydraulic pump 2 outputs is delivered to piston cylinder 12 through high-voltage tube 21, moves on the piston 13 in piston cylinder 12 under pressure, drives to draw female 14 to move up.Draw mother 14 and tensile bolt 9 thread connection, thereby elongate tensile bolt 9, make tensile bolt 9 elongations reach desired deflection, then Deformation control carries out pretension or field-strip within regime of elastic deformation, the mode by fluid power or mechanical return makes the work bolt reply original shape at last, fulfil assignment, as pressure release section is set on high-voltage tube, after completing wait stretching, unlatching pressure release section carries out pressure release, and stretcher is set back.
This pressure release section can adopt needle-valve to carry out pressure release.Bolt tensioning jack can also adopt single-stage automatically reset stretcher, multistage stretcher or the replaceable nut stretcher etc. of automatically reseting except hydraulic elongator shown in the present embodiment one.
In the present embodiment one, the first preferred employing power sensor of collecting unit 3 carries out the collection of the tensile force data of bolt tensioning jack output, with the power sensor setting to high-voltage tube, in order to gather the pressure of hydraulic oil and then calculate the tensile force of bolt tensioning jack.
This second collecting unit 4 preferably adopts displacement transducer to carry out the stretching displacement data acquisition of tensile bolt, in the present embodiment one, displacement transducer is fixedly installed on the top, bolt tension position of bolt tensioning jack by gauge stand 6, please refer to Fig. 1, when utilizing 1 pair of tensile bolt 9 of bolt tensioning jack to stretch, displacement transducer can collect the change in displacement of tensile bolt 9.Please refer to Fig. 3, this gauge stand 6 comprises fixed part 61, connecting link 62 and installation portion, and this fixed part 61 is used for the installation position 111 of gauge stand 6 fixing and lockings at support 11 shown in Figure 2.Grip between connecting link 62, in order to regulate height according to actual conditions.This installation portion 63 is used for the installing force sensor, as being fixedly connected with by being spirally connected, is convenient to later on dismounting.
The 3rd collecting unit 5 preferably adopts ultrasonic sensor to carry out tensile bolt 9 ultrasonic data acquisitions, not only can further calculate the unrelieved stress of bolt according to ultrasound data, can also identify the health status of present tensile bolt 9, in order to determine whether to change bolt.
Output for the ease of data, the Data collecting conversion device can also be set, the first collecting unit 3, the second collecting unit 4 and the 3rd collecting unit 5 all are connected with Data collecting conversion device signal, the Data Integration that each collecting unit is gathered is being exported by the Data collecting conversion device is unified to Data collecting conversion device place.
Embodiment two:
Please refer to Fig. 4, the present embodiment two provides a kind of nuclear power station bolt stress pick-up unit, and it comprises disclosed data collector in Data collecting conversion device 7, data processor 8 and embodiment one or according to the data collector of implementing a described scheme distortion and obtaining.
The data that this Data collecting conversion device 7 collects data collector are transported in data processor 8, data processor 8 adopts the existing processor that can carry out logical operation, the computing method that data processor sets are carried out logical operation, draw the unrelieved stress of tensile bolt 9.
Further, the present embodiment two provides a kind of tensile force data of bolt tensioning jack, the stretching displacement of tensile bolt and method that the tensile bolt ultrasound data calculates the tensile bolt unrelieved stress utilized.
Please refer to Fig. 5, the steps include:
1. data pre-service
At first carry out the data pre-service, the backhaul data of each data is removed, determine the afterbody end point, determine abnormity point by the normal fluctuation range of data, and removed.
2. data filtering
Consider that displacement transducer, ultrasonic sensor and power sensor have undesired signal in test process, at first original signal is processed and adopted filtering method to solve.Small echo (wavelet) filtering principle of work: wavelet transformation is to be the stack of a series of wavelet functions bunch with signal decomposition, adopt multiscale analysis (Multi-Scale Analysis) method that analyzed signal is decomposed on different scale, process by hierarchical signal the purpose that reconstruct is again processed to reach signal.Get Daubechies (db9) small echo, utilize the 8th layer of wavelet coefficient that decomposes to be reconstructed, compare with the raw sensor waveform, can extract the dynamic process of sensor measurement signal.
Because wavelet packet analysis (Wavelet Packet Analysis) technology has not only been carried out further decomposition to the signal low frequency coefficient, and HFS is carried out further decomposition, thereby improved time frequency resolution.Fast discrete WAVELET PACKET DECOMPOSITION formula is [4]: by
Ask
With
The discrete wavelet packet reconstruction formula is: by
With
Ask
Adopt Daubechies (dbN) small echo in practical application, thresholding is selected to adopt and is forced the denoising Processing method, and the coefficient in 16 to 30 nodes in the WAVELET PACKET DECOMPOSITION structure all is set to 0.And then the residue multilayer signal is reconstructed.
3. curve derivative
Look for filtered knee point according to the second derivative maximal value, computing formula:
The actual window differential technique that adopts realizes, namely selected window size, determine according to 10% of data total length usually, as window size sw=20, retardation time dt=sw; If time series is m, first order difference is:
dx1(m)=xx1(m+dt/2)-xx1(m-dt/2);
dy1(m)=(yy1(m+dt/2)-yy1(m-dt/2))/dx1(m); (3)
As window size sw=30, retardation time dt2=sw; If time series is m, second order difference is:
ddx1(m)=dx1(m+dt2/2)-dx1(m-td2/2);
ddy1(m)=(dy1(m+dt2/2)-dy1(m-td2/2))/ddx1(m); (4)
4. critical traction pressure automatic analysis
Curve is carried out the internal stress change information that the analysis of second order characteristic derivative is used for obtaining curve, and this unique point shows that a certain garnishment of bolt is estranged from, the maximal pressure force that this point is critical traction pressure.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace.
Claims (11)
1. one kind is used for the data collector that the nuclear power station bolt stress detects, and comprises bolt tensioning jack and hydraulic pump, and described bolt tensioning jack has the bolt tension position, and described hydraulic pump is communicated with bolt tensioning jack, it is characterized in that, also comprises:
Be used for the first collecting unit of the tensile force data of collection bolt tensioning jack output, described the first collecting unit is arranged on the output channel of hydraulic pump;
The second collecting unit that is used for the stretching displacement data of collection tensile bolt, described the second collecting unit are positioned at top, bolt tension position;
Be used for gathering the 3rd collecting unit of tensile bolt ultrasound data, described the 3rd collecting unit is positioned at top, bolt tension position.
2. data collector as claimed in claim 1, is characterized in that, described the second collecting unit and the 3rd collecting unit are placed on top, bolt tension position side by side.
3. data collector as claimed in claim 1, is characterized in that, described the first collecting unit comprises the power sensor, and described power sensor is located on the pressure piping of hydraulic pump.
4. data collector as claimed in claim 1, is characterized in that, described the second collecting unit comprises displacement transducer.
5. data collector as claimed in claim 1, is characterized in that, described the 3rd collecting unit comprises ultrasonic sensor.
6. data collector as described in any one in claim 1 to 5, it is characterized in that, described bolt tensioning jack comprises support, piston cylinder, piston and draws mother, described piston cylinder is fixedly mounted on support, and be communicated with hydraulic pump, described piston is contained in piston cylinder slidably, and the described mother of drawing is fixedly connected on piston, and draws and have the internal thread that coordinates with tensile bolt on mother.
7. data collector as claimed in claim 6, is characterized in that, also comprises the Data collecting conversion device, and described the first collecting unit, the second collecting unit and the 3rd collecting unit all are connected with Data collecting conversion device signal.
8. data collector as claimed in claim 6, is characterized in that, pressure release section is set on the pressure piping of hydraulic pump.
9. data collector as claimed in claim 6, is characterized in that, described bolt tensioning jack adopts hydraulic elongator, single-stage automatically reset stretcher, multistage stretcher or the replaceable nut stretcher of automatically reseting.
10. data collector as claimed in claim 6, is characterized in that, described hydraulic pump adopts electric hydraulic pump, pneumatically powered hydraulic pump or hydraulic hand-pump.
11. a nuclear power station bolt stress pick-up unit is characterized in that, comprising:
As the described data collector of claim 1-5 any one;
Data collecting conversion device, described the first collecting unit, the second collecting unit and the 3rd collecting unit all are connected with Data collecting conversion device signal;
Be used for the data that collect are processed and calculated the data processor of bolt stress, described data processor is connected with Data collecting conversion device signal.
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| CN 201220593555 CN202994342U (en) | 2012-11-12 | 2012-11-12 | Nuclear power plant bolt stress data collection device and detection device thereof |
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Cited By (8)
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| CN105092123A (en) * | 2015-07-10 | 2015-11-25 | 北京航空航天大学 | Local stress detection platform for bolt assembling of aerospace structural member |
| CN105817831A (en) * | 2016-05-13 | 2016-08-03 | 中广核研究院有限公司 | Threaded hole defect detecting and repairing method and device for large container and device of nuclear power plant |
| CN105855862A (en) * | 2016-06-06 | 2016-08-17 | 淮南市鸿裕工业产品设计有限公司 | Tensioning operation stroke limiting module of bolt tensioning machine |
| CN108387338A (en) * | 2018-02-07 | 2018-08-10 | 大连理工大学 | A kind of bolt pretightening real time high precision detection method and system based on piezoelectric supersonic chip |
| CN108692835A (en) * | 2018-06-08 | 2018-10-23 | 北京金风科创风电设备有限公司 | Calibration system |
| CN109455202A (en) * | 2018-11-05 | 2019-03-12 | 常州市新创智能科技有限公司 | A kind of equipment compartment safe condition Intellisense network system |
| WO2020103185A1 (en) * | 2018-11-19 | 2020-05-28 | 深圳中广核工程设计有限公司 | Nuclear power plant equipment gate connection fastening structure and fastening method therefor |
| CN116659826A (en) * | 2022-08-23 | 2023-08-29 | 国家电投集团科学技术研究院有限公司 | Method and device for detecting state of wind power bolt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105092123A (en) * | 2015-07-10 | 2015-11-25 | 北京航空航天大学 | Local stress detection platform for bolt assembling of aerospace structural member |
| CN105817831A (en) * | 2016-05-13 | 2016-08-03 | 中广核研究院有限公司 | Threaded hole defect detecting and repairing method and device for large container and device of nuclear power plant |
| CN105817831B (en) * | 2016-05-13 | 2018-07-10 | 中广核研究院有限公司 | The screw hole defects detection and restorative procedure of nuclear power station large container and equipment, device |
| CN105855862A (en) * | 2016-06-06 | 2016-08-17 | 淮南市鸿裕工业产品设计有限公司 | Tensioning operation stroke limiting module of bolt tensioning machine |
| CN108387338B (en) * | 2018-02-07 | 2020-05-15 | 大连理工大学 | Real-time high-precision detection method and system for bolt pretightening force based on piezoelectric ultrasonic wafer |
| CN108387338A (en) * | 2018-02-07 | 2018-08-10 | 大连理工大学 | A kind of bolt pretightening real time high precision detection method and system based on piezoelectric supersonic chip |
| CN108692835B (en) * | 2018-06-08 | 2021-09-24 | 北京金风科创风电设备有限公司 | Calibration system |
| CN108692835A (en) * | 2018-06-08 | 2018-10-23 | 北京金风科创风电设备有限公司 | Calibration system |
| CN109455202A (en) * | 2018-11-05 | 2019-03-12 | 常州市新创智能科技有限公司 | A kind of equipment compartment safe condition Intellisense network system |
| CN109455202B (en) * | 2018-11-05 | 2024-01-19 | 常州市新创智能科技有限公司 | Intelligent perception network system for safety state of equipment compartment |
| WO2020103185A1 (en) * | 2018-11-19 | 2020-05-28 | 深圳中广核工程设计有限公司 | Nuclear power plant equipment gate connection fastening structure and fastening method therefor |
| EP3886114A4 (en) * | 2018-11-19 | 2022-08-31 | China Nuclear Power Design Company Ltd. (Shenzhen) | Nuclear power plant equipment gate connection fastening structure and fastening method therefor |
| CN116659826A (en) * | 2022-08-23 | 2023-08-29 | 国家电投集团科学技术研究院有限公司 | Method and device for detecting state of wind power bolt |
| CN116659826B (en) * | 2022-08-23 | 2024-02-06 | 国家电投集团科学技术研究院有限公司 | Method and device for detecting state of wind power bolt |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA GENERAL NUCLEAR GROUP CO., LTD. Free format text: FORMER NAME: CHINA GUANGDONG NUCLEAR POWER GROUP CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city Guangdong province 518031 17 19 floor Patentee after: CHINA GENERAL NUCLEAR POWER Corp. Patentee after: DAYABAY NUCLEAR POWER OPERATIONS AND MANAGEMENT Co.,Ltd. Address before: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city Guangdong province 518031 17 19 floor Patentee before: CHINA GUANGDONG NUCLEAR POWER GROUP Co.,Ltd. Patentee before: DAYABAY NUCLEAR POWER OPERATIONS AND MANAGEMENT Co.,Ltd. |
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Effective date of registration: 20161018 Address after: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city Guangdong province 518031 17 19 floor Patentee after: CHINA GENERAL NUCLEAR POWER Corp. Patentee after: LINGDONG NUCLEAR POWER Co.,Ltd. Address before: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city Guangdong province 518031 17 19 floor Patentee before: CHINA GENERAL NUCLEAR POWER Corp. Patentee before: DAYABAY NUCLEAR POWER OPERATIONS AND MANAGEMENT Co.,Ltd. |
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