CN209841252U - Based on ultrasonic wave bolt pretightning force monitoring devices - Google Patents
Based on ultrasonic wave bolt pretightning force monitoring devices Download PDFInfo
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- CN209841252U CN209841252U CN201822206159.5U CN201822206159U CN209841252U CN 209841252 U CN209841252 U CN 209841252U CN 201822206159 U CN201822206159 U CN 201822206159U CN 209841252 U CN209841252 U CN 209841252U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 13
- 239000000523 sample Substances 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 21
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 230000036316 preload Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model provides a based on ultrasonic wave bolt pretightning force monitoring devices belongs to ultrasonic testing technical field. It has solved the current poor scheduling problem of ultrasonic monitoring effect. The device comprises a control end, a processor end and at least 2 ultrasonic probes; the control end comprises an input end and an output end; the operating end or the processor end is provided with a storage module, and the storage module is pre-stored with stress data before bolt installation and is used for calling; the input end is used for inputting an operation instruction, and the processor end receives the operation instruction, selects the corresponding ultrasonic probe and sends the operation instruction; the ultrasonic probe is used for receiving an operation instruction, exciting and emitting ultrasonic waves, receiving ultrasonic echo signals and transmitting the ultrasonic echo signals to the processor end; the processor end receives the ultrasonic echo signals, retrieves the reference data before the corresponding bolt is installed from the storage module, calculates to obtain bolt pretightening force data and sends the bolt pretightening force data to the output end; the output end is used for receiving and displaying bolt pretightening force data. The utility model has the advantages of monitoring effect is good.
Description
Technical Field
The utility model belongs to the technical field of the ultrasonic testing, in particular to based on ultrasonic wave bolt pretightning force measuring device.
Background
Bolts are widely used as fasteners in daily life and in industrial production. However, the function of the bolt is not small, once the bolt fails, the whole mechanical device cannot work, and even the machine is seriously damaged, so people are killed, especially in the fields of railway bridges, hydropower, wind power and nuclear power, transportation, aerospace and the like. Therefore, the bolt pretightening force is accurately mastered and necessary correction is carried out according to the monitoring result, which is particularly important for safe production.
The pretightening force of the bolts means that all the bolts need to be tightened, so that the bolts are subjected to acting force in advance before bearing working load. The pre-tightening can improve the reliability and the anti-loosening capability of bolt connection and the anti-fatigue degree of the bolt, and enhance the tightness and the rigidity of connection. For a particular bolt, the magnitude of the preload force is related to the tightening torque of the bolt, the friction between the bolt and the nut, and the friction between the nut and the coupled member.
In order to ensure that equipment can safely operate and eliminate potential safety hazards in time, the pretightening force of the bolt is usually detected, the bolt can be maintained and replaced before the bolt fails, but the existing bolt pretightening force detection method cannot realize monitoring and is poor in monitoring effect.
Disclosure of Invention
The utility model aims at the above-mentioned problem that exists among the prior art, a monitoring effect is good based on ultrasonic wave bolt pretightning force monitoring devices is provided.
The utility model discloses an accessible following technical scheme realizes: the monitoring device based on the ultrasonic wave bolt pretightening force is characterized by comprising a control end, a processor end and at least 2 ultrasonic wave probes;
the control end comprises an input end and an output end;
the operating end or the processor end is provided with a storage module, and the storage module is pre-stored with stress data before bolt installation and is used for calling;
the input end is used for inputting an operation instruction, and the processor end receives the operation instruction, selects the corresponding ultrasonic probe and sends the operation instruction;
the ultrasonic probe is used for receiving an operation instruction, exciting ultrasonic waves, transmitting the ultrasonic waves to the bolt, receiving ultrasonic echo signals and transmitting the ultrasonic echo signals to the processor end;
the processor receives the ultrasonic echo signals, retrieves reference data before installation of the corresponding bolt from the storage module, calculates to obtain bolt pretightening force data and sends the bolt pretightening force data to the output end;
and the output end is used for receiving and displaying bolt pretightening force data.
The working principle is as follows: this monitoring devices measures the supersound echo benchmark of bolt not twisted state earlier and prestores, and at the in-process that carries out the monitoring to the bolt on the equipment, contrasts with the benchmark data of prestoring of this bolt, carries out contrast calculation according to the actual measurement ultrasonic wave waveform of every bolt self, makes the measurement of the pretension force of every bolt more accurate, prevents the misdetection, promotes the monitoring effect of bolt.
In the ultrasonic-based bolt pretightening force monitoring device, the data prestored in the storage module is echo reference data measured by the ultrasonic probe under the bolt untwisted state, the reference data is input through the input module and is sent to the storage module, and the storage module receives and stores the reference data.
In the ultrasonic-based bolt pretightening force monitoring device, the control end is provided with a first communication module, the processor end is provided with a second communication module, and the first communication module is in communication connection with the second communication module and is used for the operation end and the processor end to transmit data.
In the device for monitoring the pretightening force of the ultrasonic bolt, an adapter plate is further included, and the adapter plate is in communication connection with the processor end and the ultrasonic probe respectively.
Compared with the prior art, the utility model discloses according to the bolt that awaits measuring of difference, select the ultrasonic transducer who corresponds to detect, contrast with the data of this bolt of not twisting the state again for the data of measuring are more accurate, prevent the misdetection, promote the monitoring effect to the bolt.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
In the figure, 1, an operation end; 2. a processor side; 3. an ultrasonic probe; 4. an input end; 5. an output end; 6. A storage module; 7. a first communication module; 8. a second communication module; 9. an adapter plate.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, the ultrasonic-based bolt pretightening force monitoring device comprises a control end, a processor end 2 and at least 2 ultrasonic probes 3; the control end comprises an input end 4 and an output end 5; the operating end 1 or the processor end 2 is provided with a storage module 6, and the storage module 6 prestores stress data before bolt installation and is used for calling; the input end 4 is used for inputting an operation instruction, and the processor end 2 receives the operation instruction, selects the corresponding ultrasonic probe 3 and sends the operation instruction; the ultrasonic probe 3 is used for receiving an operation instruction, exciting ultrasonic waves, transmitting the ultrasonic waves to the bolt, receiving ultrasonic echo signals and transmitting the ultrasonic echo signals to the processor end 2; the processor end 2 receives the ultrasonic echo signals, retrieves reference data before installation of the corresponding bolt from the storage module 6, calculates to obtain bolt pretightening force data and sends the bolt pretightening force data to the output end 5; and the output end 5 is used for receiving and displaying bolt pretightening force data.
In further detail, the data pre-stored in the storage module 6 is reference data measured by the ultrasonic probe 3 in a bolt untwisted state, the reference data is input through the input module and is sent to the storage module 6, and the storage module 6 receives and stores the reference data.
In further detail, the control end has a first communication module 7, the processor end 2 has a second communication module 8, and the first communication module 7 is in communication connection with the second communication module 8 and is used for the operation end 1 and the processor end 2 to transmit data.
In further detail, the ultrasonic diagnosis device further comprises an adapter plate 9, and the adapter plate 9 is in communication connection with the processor end 2 and the ultrasonic probe 3 respectively.
Foretell operation end 1 is computer end or removal end, and operating personnel selects the bolt that needs the measurement through operation end 1, can make 3 transmission wave sound waves of ultrasonic probe corresponding with the bolt that need measure, and receive the ultrasonic wave echo, and the stress contrast calculation who has surveyed under the untwisted state with this bolt obtains the pretightning force of this bolt, and operating personnel judges whether there is the risk of damage according to the pretightning force again, if there is the risk, can in time change, can effectively prevent the emergence of accident.
Because the bolt is in large quantity, in order to guarantee the monitoring to each bolt, each bolt all installs corresponding ultrasonic probe 3, only need control corresponding ultrasonic probe 3 operation can realize the monitoring to each bolt. Since the number of the ultrasonic probes 3 is large, it is necessary to connect each ultrasonic probe 3 with the adapter plate 9. The processor selects the ultrasonic probe 3 to be selected through the adapter plate 9, and the ultrasonic probe 3 is controlled all the time. The adapter board 9 communicates with the processor terminal 2 via RS-485.
Because the ultrasonic probe 3 is connected to the equipment, the operation end 1 is in communication connection with the processor, the bolt on the equipment can be monitored through remote operation, and workers do not need to arrive at the site.
The ultrasonic echo signal before the bolt is screwed is generally called a reference echo signal, the ultrasonic echo signal after the bolt is screwed is generally called a measured echo signal, and the screwing force, also called the screwing stress, can be obtained by comparing the measured echo signal with the reference echo signal and utilizing a calibration relation.
The ultrasonic probe 3 emits and receives echo waves with obvious interface waves and can measure the sound velocity of a measured object
In the formula: csIs the sound velocity of the bolt, delta is the geometric length of the bolt, tsIs a primary bottom wave of the bolt, t0Receiving a surface wave of the probe in contact with the bolt;
measuring sound velocity of the bolt in the untwisted state, and obtaining the sound velocity by using the change rate of the sound velocity and applying a calibration loadCoefficient of acoustic elasticity KσCoefficient of acoustic elasticity KσIs to apply a nominal load sigmaFSound velocity change Δ C before and after bolt tightening and sound velocity C in bolt non-tightened statesAs a function of the variables:
in the formula, σFIn order to apply a calibration load, the delta C is the sound velocity change before and after loading;
the expression of the loaded calibration load is as follows:
in the formula: sigmaFIn order to calibrate the applied load, delta C is the sound velocity change before and after loading, and b' is a constant;
in the calibration mode, the sound velocity is irrelevant to the absolute sound velocity of the bolt, and an inverse function is obtained
Order toThe expression for the pretension test is then
Wherein,
in the formula, tσTime of flight (TOF), t, for stressing test boltssdTo test the time of flight (TOF) when the bolt is unstressed.
According to the ultrasonic echo benchmark when each bolt to be detected is not screwed up and the actual measurement ultrasonic echo after being screwed up, the comparison calculation is carried out, so that whether the bolt has the risk of damage or not is judged, the calculation is more accurate, the real-time monitoring can be carried out on each bolt, and the detection effect is improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although a large number of terms are used here more, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (4)
1. The monitoring device based on the ultrasonic wave bolt pretightening force is characterized by comprising an operation end (1), a processor end (2) and at least 2 ultrasonic probes (3);
the operation end (1) comprises an input end (4) and an output end (5);
the operating end (1) or the processor end (2) is provided with a storage module (6), and the storage module (6) is pre-stored with stress data before bolt installation and is used for calling;
the input end (4) is used for inputting an operation instruction, and the processor end (2) receives the operation instruction, selects the corresponding ultrasonic probe (3) and sends the operation instruction;
the ultrasonic probe (3) is used for receiving an operation instruction, exciting ultrasonic waves, transmitting the ultrasonic waves to the bolt, receiving ultrasonic echo signals and transmitting the ultrasonic echo signals to the processor end (2);
the processor end (2) receives the ultrasonic echo signals, retrieves reference data before installation of the corresponding bolt from the storage module (6), calculates to obtain bolt pretightening force data and sends the bolt pretightening force data to the output end (5);
and the output end (5) is used for receiving and displaying bolt pretightening force data.
2. The ultrasonic-based bolt pretightening force monitoring device according to claim 1, wherein the data prestored in the storage module (6) is echo reference data measured by the ultrasonic probe (3) in the bolt untwisted state, the reference data is input through the input module and is sent to the storage module (6), and the storage module (6) receives and stores the reference data.
3. The ultrasonic-based bolt pretension monitoring device according to claim 1, wherein the operation end (1) is provided with a first communication module (7), the processor end (2) is provided with a second communication module (8), and the first communication module (7) is in communication connection with the second communication module (8) and is used for the operation end (1) and the processor end (2) to transmit data.
4. The ultrasonic-based bolt pretightening force monitoring device according to claim 1, further comprising an adapter plate (9), wherein the adapter plate (9) is in communication connection with the processor end (2) and the ultrasonic probe (3) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822206159.5U CN209841252U (en) | 2018-12-26 | 2018-12-26 | Based on ultrasonic wave bolt pretightning force monitoring devices |
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| CN201822206159.5U CN209841252U (en) | 2018-12-26 | 2018-12-26 | Based on ultrasonic wave bolt pretightning force monitoring devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813474A (en) * | 2018-12-26 | 2019-05-28 | 杭州戬威机电科技有限公司 | Based on ultrasonic wave tools for bolts ' pretension force monitoring methods, device, equipment and storage medium |
| CN113176031A (en) * | 2021-04-30 | 2021-07-27 | 中车青岛四方机车车辆股份有限公司 | Bolt pretightening force monitoring equipment, method and device |
| CN114323375A (en) * | 2021-05-12 | 2022-04-12 | 国网山西省电力公司电力科学研究院 | GIS basin-type insulator flange stress detection method and system |
-
2018
- 2018-12-26 CN CN201822206159.5U patent/CN209841252U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813474A (en) * | 2018-12-26 | 2019-05-28 | 杭州戬威机电科技有限公司 | Based on ultrasonic wave tools for bolts ' pretension force monitoring methods, device, equipment and storage medium |
| CN113176031A (en) * | 2021-04-30 | 2021-07-27 | 中车青岛四方机车车辆股份有限公司 | Bolt pretightening force monitoring equipment, method and device |
| CN114323375A (en) * | 2021-05-12 | 2022-04-12 | 国网山西省电力公司电力科学研究院 | GIS basin-type insulator flange stress detection method and system |
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Address after: Room 301-302, Building 3, No. 258 Xiqin Street, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province, 310023 Patentee after: Hangzhou Jianwei Technology Co.,Ltd. Address before: 310000 Room 502, 5 / F, building 2, 768 Jingchang Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU JIANWEI MECHANICAL & ELECTRICAL TECHNOLOGY Co.,Ltd. |
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