CN204831169U - Bolt looseness on -line monitoring device - Google Patents

Bolt looseness on -line monitoring device Download PDF

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Publication number
CN204831169U
CN204831169U CN201520115657.2U CN201520115657U CN204831169U CN 204831169 U CN204831169 U CN 204831169U CN 201520115657 U CN201520115657 U CN 201520115657U CN 204831169 U CN204831169 U CN 204831169U
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China
Prior art keywords
bolt
nut
rotating core
looseness
bolt looseness
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Active
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CN201520115657.2U
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Chinese (zh)
Inventor
唐立文
赵捷
郭礼春
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Yunnan Ku Lian Science And Technology Ltd
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Yunnan Ku Lian Science And Technology Ltd
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Abstract

The utility model relates to a bolt looseness on -line monitoring device. Contain magneto resistive sensor, fixed baseplate, commentaries on classics mobile core, permanent magnet, processing circuit. When bolt looseness, relative angular displacement can take place for bolt and nut, installs magneto resistive sensor in fixed baseplate and can detect and inlay the permanent magnet who adorns in the nut mobile core of rotateing upward and take place to rotate the magnetic variation that causes, handles the back through processing circuit, with the relative angular displacement data transmission of bolt nut central to bolt and nut 0, realization bolt looseness bolt and nut 2. Compared with the prior art, through the utility model discloses, can use lower cost to realize bolt looseness whether on -line monitoring, remove the manual work from and patrol and examine the numerous and diverse the work whether bolt becomes flexible, reach the purpose of providing early warning information when becoming flexible appears in the bolt rapidly.

Description

A kind of bolt looseness on-Line Monitor Device
Technical field
The utility model relates to machanical fastener detection field, is specifically related to a kind of bolt looseness on-Line Monitor Device.
Background technology
The assembling of large-scale wind driven generator, bullet train generator and steel construction electric power pylon and fastening; all employ high-strength fastening bolt and nut; can not stop to rock in aerogenerator, electric power pylon are in strong wind; bullet train is in operation also can continuous vibration; the existence of these vibrations, can make to install fastening bolt and there is the risk loosened.When loosening appears in bolt, the pressure between web member will be made to diminish, in important force part, the pressure between web member reduces to have serious consequences to connected equipment.In order to avoid this risk, traditional way regularly checks coupling bolt look at whether occurred angular displacement between screw bolt and nut, if having, just must re-start pretension to bolt.But, bolt due to fixing blade of wind-driven generator is positioned at the high-altitude of distance more than tens meters, except periodic inspection cost is high and with except the risk of personal safety, also must stop the work of aerogenerator, in addition, hand inspection also also exists the check result varied with each individual, and is difficult to the accuracy and the reliability that ensure check result.For the bolt inspection of electric power pylon, there is above problem equally.
For above problem, lot of domestic and international research institution and enterprise and individual have carried out large quantifier elimination, to how to prevent bolt looseness from giving the countermeasure of both direction, a direction designs from the structure of bolt, make every effort to design one loose bolts never, loosening and providing warning message in time of monitoring bolt how is carried out in another direction.As Chinese patent 201310470244.1 " quick monitoring method of steel tower bolt looseness and device " proposes a kind of method for quick for steel tower bolt looseness, its central principle is after bolt looseness, the bolt loosened and steel tower parts have relative motion, apply an outside vibration source at any part of steel tower and monitor echo signal, see whether echo signal has secondary impact sound, judge whether steel tower exists loosening bolt with this, with the present invention, only can find that bolt looseness is to having occurred the relative fault loosened between bolt with fastener, simultaneously, also can there is false alarm because steel tower existing some parts with relative micrometric displacement.Chinese patent 201110285285.4 " a kind of fastener on large-scale wind driven generator " proposes a kind of fastener on large-scale wind driven generator, to be designed, designed be used as securing member with the bolt and nut in special flange face to its central principle, there will be loosening situation to prevent conventional bolt securing member.This invention thinks that the main cause that why there will not be locking to loosen is " by designing the diameter of suitable screw bolt and nut flange face, the flank of tooth, teeth groove quantity, the gradient exit torque ratio screw-down torque high proper proportion under just can be implemented in the condition of identical coupling mechanism force ", in actual applications, not only be difficult to the condition meeting inventor's proposition, also there is great limitation simultaneously.
For Problems Existing, the utility model provides a kind of bolt looseness on-Line Monitor Device.
Summary of the invention
The technical scheme that the utility model adopts is, a kind of bolt looseness on-Line Monitor Device, comprise magnetoresistive transducer, fixed pedestal, rotating core, be no less than permanent-magnet block, the signal processing circuit of, it is characterized in that, magnetoresistive transducer, signal processing circuit are installed in fixed pedestal, fixed pedestal bonds with bolt pedestal or is fixedly connected with, rotating core bonds or is flush-mounted on nut, the permanent magnet being no less than one is installed on rotating core along rotating core radial direction in the alternatively distributed mode of N, S magnetic pole radial, and fixed pedestal and rotating core move and be connected; Described fixed pedestal, rotating core adopt non-magnet material to make; The prefabricated hexagonal step of plurality of specifications size on described rotating core, for the hexagonal (hexagon)nut of nested different specification size; Described signal processing circuit comprises wired or transmission of wireless signals functional module.
Compared with prior art, adopt the present invention, not only do not need to stop power supply, plug-in dedicated tester detects whether loosening of tested bolt, uninterrupted on-line monitoring can also be carried out to bolt in real time, dramatically reduce the workload of circling measurment, guarantee the safety of maintainer, increase work efficiency, guarantee device security.
Accompanying drawing explanation
Fig. 1 is the sectional view of bolt on-Line Monitor Device of the present utility model.
Fig. 2 is the structural drawing of the rotating core of bolt on-Line Monitor Device of the present utility model.
Fig. 3 is the structural drawing of another inspection surface of rotating core of bolt on-Line Monitor Device of the present utility model.
Fig. 4 bolt on-Line Monitor Device of the present utility model electrical principle block diagram.
Embodiment
The sectional view for bolt on-Line Monitor Device of the present utility model as shown in Figure 1.As shown in the figure,
Bolt on-Line Monitor Device of the present utility model comprises fixed pedestal 1, signal processing circuit 2, fixed pedestal cover plate 3, rotating core 4, permanent magnet 5, coupling bolt 6.Fixed pedestal 1 is bondd with the pedestal of monitored bolt or is fastenedly connected by coupling bolt 6, signal processing circuit 2 is installed in the confined space that fixed pedestal 1 and fixed pedestal cover plate 3 form, rotating core 4 is loaded in fixed pedestal 1, and rotating core 4 is connected with fixed pedestal 1 is dynamic;
As shown in Figure 2, the mode that 18 permanent magnets 5 are alternately placed along the radial direction of rotating core 4 with N, S pole is flush-mounted on rotating core 4;
As shown in Figure 3, multiple hexagon steps of dynamic core 4 inside of dress are used for rabbeting with the nut of monitored bolt or boning, and when the relative bolt of nut does angular displacement, drive rotating core 4 to rotate;
The electrical principle block diagram of bolt on-Line Monitor Device of the present utility model as shown in Figure 4.Magnetoresistive transducer 21 is welded on MCU processor circuit board 22, and data transmission module 23 is welded on circuit board 22, and magnetoresistive transducer 21, MCU processor circuit board 22, data transmission module 23 form signal processing circuit 2.The output terminal of magnetoresistive transducer 21 is connected to the I2C data input pin of MCU processor circuit board 22 through I2C bus, the RS232/485 data output end of MCU processor circuit board 22 is connected to the RS232/485 input end of data transmission module 23.
When monitored bolt looseness, micro angular displacement can be there is in detected bolt relative to monitored nut, the rotating core 4 be fixed on monitored nut can rotate together along with nut, the permanent magnet 5 be nested on rotating core 4 also together rotates along with the rotation of rotating core 4, because the signal processing circuit be installed in fixed pedestal is fixed, therefore, the magnetoresistive transducer 21 be welded in signal processing circuit can export because of the rotation of permanent magnet 5 the small deflection signal monitored, this defection signal after signal processing circuit 2 analyzing and processing and judge be bolt looseness after, information processing centre is transferred to through data transmission module 23 by this loosening signal, and then complete the on-line monitoring of bolt looseness.
Above embodiment illustrates the embodiment of a bolt looseness on-Line Monitor Device, and the right all invaded the utility model and protect is applied in the change adopting such as radial magnetizing structure etc. to be out of shape for rotating core.

Claims (4)

1. a bolt looseness on-Line Monitor Device, comprise magnetoresistive transducer, fixed pedestal, rotating core, be no less than permanent magnet, the signal processing circuit of, it is characterized in that, magnetoresistive transducer, signal processing circuit are installed in fixed pedestal, fixed pedestal bonds with bolt pedestal or is fixedly connected with, rotating core bonds or is flush-mounted on nut, the permanent magnet being no less than one is installed on rotating core along rotating core radial direction in the alternatively distributed mode of N, S magnetic pole radial, and fixed pedestal and rotating core move and be connected.
2. a kind of bolt looseness on-Line Monitor Device according to claim 1, is characterized in that, described fixed pedestal, rotating core adopt non-magnet material to make.
3. a kind of bolt looseness on-Line Monitor Device according to claim 1, is characterized in that, the prefabricated hexagonal step of plurality of specifications size on described rotating core, for the hexagonal (hexagon)nut of nested different specification size.
4. a kind of bolt looseness on-Line Monitor Device according to claim 1, is characterized in that, described signal processing circuit comprises wired or transmission of wireless signals functional module.
CN201520115657.2U 2015-02-25 2015-02-25 Bolt looseness on -line monitoring device Active CN204831169U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520115657.2U CN204831169U (en) 2015-02-25 2015-02-25 Bolt looseness on -line monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520115657.2U CN204831169U (en) 2015-02-25 2015-02-25 Bolt looseness on -line monitoring device

Publications (1)

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CN204831169U true CN204831169U (en) 2015-12-02

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104614775A (en) * 2015-02-25 2015-05-13 云南酷联科技有限公司 Bolt looseness on-line monitoring device
CN106441838A (en) * 2016-09-07 2017-02-22 三峡大学 Adjustable high precision bolt dynamic loosening test vibration instrument under action of tensile, compression and shear force
CN107345456A (en) * 2016-05-04 2017-11-14 长城鑫瑞鑫通讯设备集团有限公司 A kind of steel tower failure warning system
CN111351423A (en) * 2020-03-19 2020-06-30 郑州陆根智能技术有限公司 Flange connecting bolt looseness monitoring method
CN112082471A (en) * 2020-09-16 2020-12-15 罗治军 Formula wind generating set bolt on-line monitoring device is inhaled to magnetism
CN112461430A (en) * 2020-11-26 2021-03-09 燕山大学 Bolt state online monitoring system of wind driven generator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104614775A (en) * 2015-02-25 2015-05-13 云南酷联科技有限公司 Bolt looseness on-line monitoring device
CN107345456A (en) * 2016-05-04 2017-11-14 长城鑫瑞鑫通讯设备集团有限公司 A kind of steel tower failure warning system
CN106441838A (en) * 2016-09-07 2017-02-22 三峡大学 Adjustable high precision bolt dynamic loosening test vibration instrument under action of tensile, compression and shear force
CN106441838B (en) * 2016-09-07 2018-08-07 三峡大学 Bolt looseness tests vibration gauge under adjustable Dynamic High-accuracy tension and compression shearing force
CN111351423A (en) * 2020-03-19 2020-06-30 郑州陆根智能技术有限公司 Flange connecting bolt looseness monitoring method
CN112082471A (en) * 2020-09-16 2020-12-15 罗治军 Formula wind generating set bolt on-line monitoring device is inhaled to magnetism
CN112461430A (en) * 2020-11-26 2021-03-09 燕山大学 Bolt state online monitoring system of wind driven generator

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