CN214537807U - Looseness monitoring device for bolt or nut - Google Patents
Looseness monitoring device for bolt or nut Download PDFInfo
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- CN214537807U CN214537807U CN202022614191.4U CN202022614191U CN214537807U CN 214537807 U CN214537807 U CN 214537807U CN 202022614191 U CN202022614191 U CN 202022614191U CN 214537807 U CN214537807 U CN 214537807U
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Abstract
The utility model discloses a not hard up monitoring devices of bolt or nut, the quantity of bolt or nut is at least two and all is used for the fastening on a base, just bolt or nut have non-circular head, not hard up monitoring devices includes: the optical fiber deformation sensor and the supporting device; the optical fiber deformation sensor is provided with a deformation induction section, the supporting device is arranged on the base and is used for supporting the optical fiber deformation sensor, and the deformation induction section of the optical fiber deformation sensor is arranged at a corresponding position of a non-circular head part between two bolts or nuts, so that the deformation induction section deforms when any non-circular head part of the two bolts or nuts rotates. The loosening monitoring device for the bolts or the nuts, provided by the utility model, can find the loosening and the fracture condition of the adjacent fixed bolts or nuts in time so as to be convenient for maintenance in time; meanwhile, the number of sensors is reduced, and the measurement accuracy is improved.
Description
The application claims priority from chinese patent application CN201922336060.1 filed 2019, 12 and 20. The present application refers to the above-mentioned chinese patent application in its entirety.
Technical Field
The utility model relates to an adjacent fixing bolt or nut state monitoring technology especially relates to a not hard up monitoring devices of bolt or nut.
Background
At present, the wind power generation industry is widely popularized all over the world, and due to the fact that most of the wind power generation industry is arranged on the sea or in remote mountainous areas along the sea, daily maintenance is extremely inconvenient. Moreover, the number of bolts or nuts for fixing the large-scale wind driven generator is extremely large (more than 500 bolts are fixed on one large-scale wind driven generator), and the bolts or nuts are easy to loosen on the wind driven generator due to the extremely bad environment, and the loosening of the bolts or nuts can cause the damage and even collapse of the wind driven generator. During the normal operation of the wind generating set, the polling period of the high-strength bolt is generally half a year to one year, the polling period interval is long, the condition that the bolt is loosened or broken cannot be found in time, and a large amount of time, manpower and material resources are consumed for polling each time, particularly for the offshore wind generating set, kilometers are deep into a coastline, the polling of the unit is inconvenient, the polling cost is high, and the like.
In the prior art, chinese patent publication No. CN110220682A discloses a monitoring device for monitoring bolt loosening, which uses a narrow bandwidth pulse laser as a light source, and connects a plurality of gratings in series on an optical fiber by time division multiplexing technology to realize the loosening detection of a plurality of bolts. In such a monitoring device, if the optical fiber is disconnected due to the use environment or the like, the monitoring device needs to be entirely replaced, which undoubtedly increases the labor cost and the material cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a not hard up monitoring devices of bolt or nut in order to overcome the not hard up defect of monitoring of bolt or nut among the prior art.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a loosening monitoring device of bolts or nuts, the number of the bolts or nuts being at least two and each being used for fastening on a base, and the bolts or nuts having a non-circular head, the loosening monitoring device comprising:
the optical fiber deformation sensor and the supporting device;
the optical fiber deformation sensor is provided with a deformation induction section, the supporting device is arranged on the base and is used for supporting the optical fiber deformation sensor, and the deformation induction section of the optical fiber deformation sensor is arranged at a corresponding position of a non-circular head part between two bolts or nuts, so that the deformation induction section deforms when any non-circular head part of the two bolts or nuts rotates.
Preferably, the deformation sensing section of the optical fiber deformation sensor is arranged between two adjacent bolts or nuts.
Preferably, the supporting device is arranged between two adjacent bolts or nuts, and the optical fiber deformation sensor is arranged between two adjacent non-circular heads of the bolts or nuts, so that the deformation sensing section is touched by the non-circular heads to generate deformation when any one of the two adjacent bolts or nuts rotates.
Preferably, the looseness monitoring device further comprises a mounting base;
the mounting base is arranged on the base; the supporting device is fixedly arranged on the mounting base.
Preferably, the looseness monitoring device further comprises a nut profiling cap, and the nut profiling cap is fixedly sleeved on the head of the bolt or the nut;
the mounting base is fixedly arranged between two adjacent bolts or nuts, and the optical fiber deformation sensor is arranged between the nut profiling caps of the two adjacent bolts or nuts;
the head of the nut copying cap is polygonal, the deformation induction section of the optical fiber deformation sensor is attached to the opposite side of the head of the nut copying cap, so that the deformation induction section drives the nut copying cap to rotate to generate deformation when any one of the two adjacent bolts or nuts rotates.
Preferably, the supporting device comprises two supporting frames, and the supporting frames are fixedly arranged on the mounting base;
the supporting frame is provided with a groove, the two ends of the optical fiber deformation sensor are provided with limiting parts, the two ends of the optical fiber deformation sensor are respectively and fixedly arranged in the groove on the supporting frame, and the limiting parts are attached to the outer side wall of the groove of the supporting frame.
Preferably, the supporting device comprises two supporting frames, and the supporting frames are fixedly arranged on the mounting base;
the optical fiber deformation sensor is characterized in that the support frame is provided with a clamping portion, the two ends of the optical fiber deformation sensor are fixedly provided with connecting portions, and the connecting portions at the two ends of the optical fiber deformation sensor are respectively clamped in the clamping portion on the support frame.
The utility model discloses an actively advance the effect and lie in: the utility model provides a bolt or nut looseness monitoring devices has realized the not hard up control of bolt or nut, can discover in time the not hard up and the fracture condition of bolt or nut for in time maintenance, improved aerogenerator and patrolled and examined the scientificity and the reliability of maintaining, realized aerogenerator adjacent fixed bolt or nut state automatic monitoring function; the number of the sensors in the bolt or nut looseness monitoring device is only one more than that of the bolts or nuts to be tested, but one bolt or nut can be simultaneously monitored by two sensors, so that the normal operation of monitoring can still be guaranteed under the special condition that one sensor fails, and the purpose of improving the testing accuracy and reliability by adopting a small number of sensors is achieved.
Drawings
Fig. 1 is a schematic structural view of a device for monitoring loosening of a bolt according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a mounting base according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of the nut-shaped cap according to the preferred embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a position of the bolt according to the preferred embodiment of the present invention when the bolt is not loosened.
Fig. 5 is a schematic view of a position structure of the bolt according to the preferred embodiment of the present invention when the bolt is loosened.
Detailed Description
The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, the schematic structural diagram of the bolt looseness monitoring device according to the preferred embodiment of the present invention, the bolt looseness monitoring device includes an optical fiber deformation sensor 1 and a supporting device 3, the optical fiber deformation sensor 1 has a deformation sensing section 12, a plurality of bolts 2 are monitored and are all used for fastening on a base 7, in this embodiment, the bolts to be monitored are hexagon bolts, the heads thereof are hexagons, the deformation sensing section 12 of the optical fiber deformation sensor is disposed between two adjacent hexagon bolts 2 and 22, the deformation sensing section 12 of the optical fiber deformation sensor is tightly attached to one side of the hexagons of the hexagon bolts 2 and 22, when any one of the hexagon bolts 2 or 22 is loosened, the hexagons of the hexagon heads rotate, so that the deformation sensing section 12 of the optical fiber deformation sensor is deformed, and the optical fiber deformation sensor 1 outputs a deformation signal, to detect bolt loosening.
The utility model discloses a not hard up monitoring devices of bolt by the head of monitoring bolt can also be quadrangle or any other non-circular shape.
The not hard up monitoring devices of bolt of this embodiment quantity and the mode of setting up of optic fibre deformation sensor 1 are not limited to this embodiment, and any mode monitoring bolt that produces deformation with optic fibre deformation sensor's deformation induction section 12 is not hard up, all falls into in essence the utility model discloses the scope of protection.
The bolt looseness monitoring device of the embodiment further comprises a mounting base 4, wherein the mounting base 4 is arranged on the base 7, and the mounting base 4 is arranged to be located between the two adjacent bolts 2 and 22; the supporting device 3 is fixedly arranged on the mounting base 4.
Fig. 2 is a schematic structural diagram of a mounting base according to a preferred embodiment of the present invention. The supporting device 3 is arranged on the mounting base 4 and used for supporting the optical fiber deformation sensor 1, and the supporting device 3 comprises two supporting frames 31; be provided with recess 32 on the support frame 31, the both ends of optic fibre deformation sensor 1 are equipped with spacing portion 11, and the both ends of optic fibre deformation sensor 1 are fixed respectively and are set up in the recess 32 of support frame, and the lateral wall laminating of the recess 32 of spacing portion 11 and support frame is used for fixed optic fibre deformation sensor 1.
The utility model discloses an among the not hard up monitoring devices of bolt, can also be provided with block portion on the support frame 31, connecting portion can also set firmly at optic fibre deformation sensor 1 both ends, and the purpose of fixed optic fibre deformation sensor 1 is realized in the block portion of the connecting portion difference block on support frame 31 at optic fibre deformation sensor 1's both ends.
The supporting device 3 in the bolt looseness monitoring device of the embodiment can also be directly fixed on the base through fixing glue or bolts.
Fig. 3 is a schematic structural view of a nut-shaped cap according to a preferred embodiment of the present invention. The utility model also comprises a nut profiling cap 5, the nut profiling cap 5 is fixedly sleeved on the head of the bolt 2, and the bolt 2 is fixed on a base 7;
the deformation induction section 12 of the optical fiber deformation sensor is arranged between the nut profiling caps 5 and 6 of the two adjacent bolts and is tightly attached to the opposite sides of the heads of the nut profiling caps 5 and 6. In this embodiment 1, the shape of the head of the nut-shaped cap 5 is hexagonal, and the deformation sensing section 12 of the optical fiber deformation sensor is attached to the opposite sides of the heads of the adjacent nut- shaped caps 5 and 6, so that the deformation sensing section 12 drives the nut-shaped cap to rotate to generate deformation when any one of the two adjacent bolts rotates. The nut profiling cap 5 needs to consider precision in processing and has a buckle structure, so that the phenomenon that the nut profiling cap 5 slips per se is prevented.
The utility model discloses a not hard up monitoring devices of bolt in the head of nut profiling cap can also be quadrangle or any other non-circular shape.
If the distance between the adjacent fixing bolts is small enough, the nut profiling caps 5 are not needed, but if the distance between the adjacent fixing bolts is large enough, the deformation induction sections 12 of the optical fiber deformation sensors cannot be attached to the edges of the heads of the adjacent fixing bolts at the same time, and rotation transmission needs to be carried out through the nut profiling caps 5.
The utility model discloses a not hard up monitoring devices of bolt of embodiment 1 realizes the not hard up principle of monitoring of bolt as follows:
as shown in fig. 4, the position structure of the bolt according to the preferred embodiment of the present invention is not loosened. The optical fiber deformation sensor 1 is fixed in and installed in the middle of two adjacent bolts, the deformation induction section 12 of the optical fiber deformation sensor is tightly attached to the heads of the two adjacent nut profiling caps 5 and 6, the deformation induction section 12 of the optical fiber deformation sensor is not stressed under normal conditions, only the deformation induction section is affected by temperature and has weak expansion with heat and contraction with cold, and at the moment, the deformation signal output by the optical fiber deformation sensor 1 is zero or outputs a weak deformation signal.
As shown in fig. 5, the position structure of the bolt according to the preferred embodiment of the present invention is schematically illustrated when the bolt is loosened. In the embodiment, the tested bolt is fixed on the base 7, the nut profiling caps 5 and 6 are hexagonal, and the deformation induction section 12 of the optical fiber deformation sensor is attached to one side of the heads of the nut profiling caps 5 and 6. When the monitored bolt loosens, the nut profiling cap sleeved on the head of the monitored bolt can be driven to rotate, when any one of the nut profiling cap 5 or the nut profiling cap 6 rotates, the hexagonal sharp angle of the nut profiling cap 5 or the nut profiling cap 6 enables the deformation induction section 12 of the optical fiber deformation sensor to deform or break, and at the moment, the optical fiber deformation sensor 1 can output a large deformation signal or output a signal loss. For example, when the bolt is loosened and rotated by 45 degrees, the nut profiling cap 5 is driven to rotate by 45 degrees, and the hexagonal sharp angle of the nut profiling cap 5 enables the deformation sensing section 12 of the optical fiber deformation sensor to deform by 3.5 mm; when the bolt takes place to become flexible and rotate 60, can drive nut profiling cap 5 and rotate 60, the hexagonal closed angle of nut profiling cap 5 makes the deformation induction section 12 deflection of optic fibre deformation sensor biggest, and optic fibre deformation sensor's deformation induction section 12 is probably broken by the stretch-break, makes optic fibre deformation sensor output signal disappearance, and great deformation signal or output signal disappearance when optic fibre deformation sensor output show that it takes place to become flexible to detect the bolt.
Because any one of the adjacent nut profiling caps 5 or 6 rotates, the deformation sensing section 12 of the optical fiber deformation sensor can deform or break, at the moment, the conditions of the optical fiber deformation sensors 1L and 1R adjacent to the left and right of the optical fiber deformation sensor 1 need to be checked simultaneously, and if the optical fiber deformation sensor 1L outputs deformation signals or signals are absent and the optical fiber deformation sensor 1R does not output deformation signals or signals are absent, the bolt where the nut profiling cap 5 is located is determined to be loosened. And if the optical fiber deformation sensor 1R outputs deformation signals or signals are lost and the optical fiber deformation sensor 1L does not output deformation signals or signals are lost, determining that the bolt where the nut profiling cap 6 is located is loosened.
The uncertainty of the measurement result of a single sensor is considered, the sensing points on two sides of the bolt are monitored simultaneously, if the variable quantities of the deformation signals output by two adjacent optical fiber deformation sensors are the same, the detected bolt is loosened, background analysis can be performed, and the test result is more reliable. If the three continuous optical fiber deformation sensors output large deformation signals or signals are lost, the two continuous bolts are loosened.
The number of the sensors in the bolt looseness monitoring device is only one more than that of the bolts to be tested, but one bolt can be monitored by two sensors at the same time, so that the normal operation of monitoring can be still guaranteed under the special condition that one sensor fails, and the purpose of improving the testing accuracy and reliability by adopting fewer sensors is achieved.
The loosening monitoring device for a bolt of the present embodiment is also applicable to the loosening monitoring of a nut having a non-circular head.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (6)
1. A loosening monitoring device for a bolt or nut, the bolt or nut being at least two in number and each being adapted to be fastened to a base, the bolt or nut having a non-circular head, the loosening monitoring device comprising:
the optical fiber deformation sensor and the supporting device;
the optical fiber deformation sensor is provided with a deformation sensing section, the deformation sensing section of the optical fiber deformation sensor is at least arranged between two adjacent bolts or nuts, the supporting device is arranged on the base and used for supporting the optical fiber deformation sensor, and the deformation sensing section of the optical fiber deformation sensor is arranged at the corresponding position of the non-circular head between the two bolts or nuts, so that the deformation sensing section is deformed when any non-circular head in the two bolts or nuts rotates.
2. The device for monitoring the loosening of the bolts or nuts as claimed in claim 1, wherein the supporting device is arranged between two adjacent bolts or nuts, and the optical fiber deformation sensor is arranged between two adjacent non-circular heads of the bolts or nuts, so that the deformation sensing section is touched by the non-circular heads to generate deformation when any one of the two adjacent bolts or nuts rotates.
3. A bolt or nut loosening monitoring device as claimed in claim 1, further comprising a mounting base;
the mounting base is arranged on the base;
the supporting device is fixedly arranged on the mounting base.
4. A device for monitoring the loosening of a bolt or nut as defined in claim 3, further comprising a nut-shaped cap fixedly fitted over the head of the bolt or nut;
the mounting base is fixedly arranged between two adjacent bolts or nuts, and the optical fiber deformation sensor is arranged between the nut profiling caps of the two adjacent bolts or nuts;
the head of the nut copying cap is polygonal, the deformation induction section of the optical fiber deformation sensor is attached to the opposite side of the head of the nut copying cap, so that the deformation induction section drives the nut copying cap to rotate to generate deformation when any one of the two adjacent bolts or nuts rotates.
5. The device for monitoring the loosening of the bolt or the nut as claimed in claim 3, wherein the supporting device comprises two supporting frames, and the supporting frames are fixedly arranged on the mounting base;
the supporting frame is provided with a groove, the two ends of the optical fiber deformation sensor are provided with limiting parts, the two ends of the optical fiber deformation sensor are respectively and fixedly arranged in the groove on the supporting frame, and the limiting parts are attached to the outer side wall of the groove of the supporting frame.
6. The device for monitoring the loosening of the bolt or the nut as claimed in claim 3, wherein the supporting device comprises two supporting frames, and the supporting frames are fixedly arranged on the mounting base;
the optical fiber deformation sensor is characterized in that the support frame is provided with a clamping portion, the two ends of the optical fiber deformation sensor are fixedly provided with connecting portions, and the connecting portions at the two ends of the optical fiber deformation sensor are respectively clamped in the clamping portion on the support frame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922336060 | 2019-12-20 | ||
| CN2019223360601 | 2019-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214537807U true CN214537807U (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022614191.4U Active CN214537807U (en) | 2019-12-20 | 2020-11-12 | Looseness monitoring device for bolt or nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214537807U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008149A (en) * | 2019-12-20 | 2021-06-22 | 奥动新能源汽车科技有限公司 | Looseness monitoring device and system for bolt or nut |
-
2020
- 2020-11-12 CN CN202022614191.4U patent/CN214537807U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008149A (en) * | 2019-12-20 | 2021-06-22 | 奥动新能源汽车科技有限公司 | Looseness monitoring device and system for bolt or nut |
| CN113008149B (en) * | 2019-12-20 | 2024-09-06 | 飞巽传感技术(上海)有限公司 | Looseness monitoring device and system for bolts or nuts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220713 Address after: 201306 C, 888, west two road, Nanhui new town, Pudong New Area, Shanghai Patentee after: Feixun sensor technology (Shanghai) Co.,Ltd. Address before: 201307 2nd floor, building 2, 4766 Jiangshan Road, Nicheng Town, Pudong New Area, Shanghai Patentee before: AULTON NEW ENERGY AUTOMOTIVE TECHNOLOGY Group |
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| TR01 | Transfer of patent right |