CN108507609B - Bolt loosening monitoring device and bolt loosening monitoring method - Google Patents
Bolt loosening monitoring device and bolt loosening monitoring method Download PDFInfo
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- CN108507609B CN108507609B CN201810357769.7A CN201810357769A CN108507609B CN 108507609 B CN108507609 B CN 108507609B CN 201810357769 A CN201810357769 A CN 201810357769A CN 108507609 B CN108507609 B CN 108507609B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
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Abstract
The invention discloses a bolt looseness monitoring device and a bolt looseness monitoring method, which relate to the technical field of industrial detection, wherein a first end part of a magnetic gasket is provided with a bolt hole, the first end part is sleeved on a screw rod through the bolt hole, the first end part is clamped between a bolt head of the bolt and a part to be connected and the magnetic gasket and the bolt have circumferential synchronous displacement, or the first end part is clamped between a nut and the part to be connected and the magnetic gasket and the nut have circumferential synchronous displacement; the second end part of the magnetic gasket extends out of the bolt head or the nut, a steel wire hole for penetrating the steel wire is formed in the second end part, the tail end of the steel wire is fixedly connected with the signal transmitting device, when the bolt is loosened, the bolt or the nut drives the magnetic gasket to move circumferentially synchronously and pull the steel wire, and the steel wire triggers the signal transmitting device to transmit a bolt loosening signal.
Description
Technical Field
The invention relates to the technical field of industrial detection, in particular to a bolt loosening monitoring device and a bolt loosening monitoring method.
Background
The bolts bear the cyclic action of tension and compression under the load. Under the action of tension and compression alternating load, the screw thread is subjected to plastic deformation to cause relaxation, so that the pretightening force of the bolt is reduced by 45% -50%, the friction moment generated at the meshing part of the bolt can not be overcome along with the reduction of the pretightening force, and finally the pretightening force is eliminated. Therefore, in order to prevent bolt loosening, monitoring the bolt connection structure and timely finding loosening problems for early warning are important.
At present, the connection state monitoring and identification research of bolts, especially bolts of wind generating sets, at home and abroad is still in a blank stage. In order to prevent the reduction or disappearance of the bolt pretension, checking the pretension of the bolt with a torque wrench is an important content of regular maintenance. When the operation and maintenance are carried out in remote zones, the periodic inspection operation and maintenance strategy of the bolt pretightening force is generally carried out once a half year. This work is time consuming and laborious, and the personal subjective and objective multi-factor effects of the staff are not guaranteed to find and eliminate the bolt loosening problem each time.
Disclosure of Invention
The invention aims to provide a bolt loosening monitoring device and a bolt loosening monitoring method, which are used for solving the problems in the prior art, simplifying the inspection operation and maintenance work and improving the timeliness and accuracy of the bolt loosening fault discovery.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a bolt looseness monitoring device, a screw rod of a bolt penetrates through two parts to be connected to connect the two parts to be connected, one end of the screw rod extending out of the parts to be connected is in threaded connection with a nut, and the device comprises:
the monitoring device is used for monitoring the tightness degree between the bolt and the part to be connected, the monitoring device comprises a magnetic gasket and a steel wire, the magnetic gasket comprises a first end part and a second end part, the first end part is provided with a bolt hole, the first end part is sleeved on the screw rod through the bolt hole, the first end part is clamped between the bolt head of the bolt and the part to be connected and the magnetic gasket and the bolt have circumferential synchronous displacement, or the first end part is clamped between the nut and the part to be connected and the magnetic gasket and the nut have circumferential synchronous displacement; the second end extends outwards and stretches out of the bolt head or the nut, the second end is provided with a steel wire hole used for penetrating the steel wire, the head end of the steel wire is used for being fixed on the part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, when the bolt is loosened, the bolt or the nut drives the magnetic gasket to move circumferentially synchronously, and the steel wire is pulled to trigger the signal transmitting device to transmit a bolt loosening signal.
Preferably, the wire hole extends from a side surface of the second end portion to an upper surface of the second end portion.
Preferably, the steel wire is a corrosion resistant steel wire.
Preferably, the signal transmitting device comprises a tension switch, a shielding box and a transmitter, wherein the tension switch is arranged on the surface of the shielding box and fixedly connected with the tail end of the steel wire, the tension switch is used for controlling the shielding box to be opened and closed, the transmitter is arranged in the shielding box, the shielding box is used for shielding signals in a closed state, and the transmitter can transmit bolt loosening signals outwards in an opened state of the shielding box.
Preferably, when the first end is clamped between the bolt head and the part to be connected, a magnet or a magnetic coating is arranged on one surface of the magnetic gasket, which is contacted with the bolt head; when the first end part is clamped between the nut and the part to be connected, a magnet or a magnetic coating is arranged on one surface of the magnetic gasket, which is contacted with the nut.
Preferably, when the device is used for monitoring loosening of a plurality of bolts, the magnetic gaskets are in one-to-one correspondence with the number of the bolts, the distance between two adjacent magnetic gaskets is equal, and the magnetic gaskets are connected in series through the steel wire.
Preferably, the tail part of the steel wire is led out from the magnetic gasket at the end of the series connection and is fixedly connected with the signal transmitting device.
The invention also provides a bolt looseness monitoring method using the bolt looseness monitoring device, which comprises the following steps:
the first end part of the magnetic gasket is sleeved on the screw rod, the first end part is clamped between the bolt head or the nut and the part to be connected, the second end part extends outwards and stretches out of the bolt head or the nut, the steel wire is arranged in the steel wire hole in a penetrating mode, the head end of the steel wire is fixed on the part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, when the bolt is loosened, the bolt or the nut drives the magnetic gasket to move circumferentially synchronously, the steel wire is pulled, and the signal transmitting device is triggered to transmit a bolt loosening signal.
Compared with the prior art, the invention has the following technical effects:
according to the bolt looseness monitoring device and the bolt looseness monitoring method, the first end portion of the magnetic gasket is sleeved on the screw rod through the bolt hole, the first end portion is clamped between the bolt head or the nut and the part to be connected, the magnetic gasket and the bolt or the nut have circumferential synchronous displacement, the second end portion is provided with the steel wire hole for penetrating the steel wire, the head end of the steel wire is fixed on the part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, when the bolt loosens, the bolt or the nut drives the magnetic gasket to synchronously move in the circumferential direction, the steel wire is pulled, and the signal transmitting device is triggered by the steel wire to transmit a bolt looseness signal, so that operation and maintenance work is simplified, timeliness and accuracy of detecting of bolt looseness faults are improved, and influences of artificial factors on the work are eliminated. The magnetic gasket has magnetic force effect with wait connecting piece, bolt head or nut, and the magnetic gasket does not take place relative displacement in the axial when having guaranteed that the bolt is not hard up, and the magnetic gasket is provided with magnet or magnetic coating with bolt head or nut contact's one side, and the magnetic force of magnetic gasket and bolt head or nut contact's one side is greater than the magnetic force of magnetic gasket and wait connecting piece contact's one side to guaranteed that magnetic gasket has circumference synchronous displacement with bolt or nut, guaranteed that the bolt is not hard up timeliness and the accuracy of detecting. The invention realizes accurate and timely early warning diagnosis on the monitored bolt connection whole, avoids major accidents, and replaces the traditional half-year bolt inspection operation and maintenance strategy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of a bolt looseness monitoring device in embodiment 1;
fig. 2 is a top view of the bolt looseness monitoring device in embodiment 1;
FIG. 3 is a top view of a magnetic spacer of the bolt looseness monitoring device provided by the invention;
FIG. 4 is a front view of the magnetic spacer of the bolt looseness monitoring device of FIG. 3;
in the figure: 1-bolts, 2-nuts, 3-flanges, 4-monitoring devices, 41-magnetic gaskets, 411-first ends, 412-bolt holes, 413-second ends, 414-wire holes, 42-wires, and 5-signal transmitting devices.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a bolt loosening monitoring device and a bolt loosening monitoring method, which are used for solving the problems in the prior art, simplifying the inspection operation and maintenance work and improving the timeliness and accuracy of the bolt loosening fault discovery.
The invention provides a bolt looseness monitoring device, a screw rod of a bolt penetrates through two parts to be connected to connect the two parts to be connected, and one end of the screw rod extending out of the parts to be connected is in threaded connection with a nut, and the bolt looseness monitoring device comprises: the monitoring device is used for monitoring the tightness degree between the bolt and the part to be connected, the monitoring device comprises a magnetic gasket and a steel wire, the magnetic gasket comprises a first end part and a second end part, the first end part is provided with a bolt hole, the first end part is sleeved on the screw rod through the bolt hole, the first end part is clamped between the bolt head of the bolt and the part to be connected, the magnetic gasket and the bolt have circumferential synchronous displacement, or the first end part is clamped between the nut and the part to be connected, and the magnetic gasket and the nut have circumferential synchronous displacement; the second end extends outwards and stretches out of the bolt head or the nut, the second end is provided with a steel wire hole for penetrating the steel wire, the head end of the steel wire is fixed on a part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, when the bolt loosens, the bolt or the nut drives the magnetic gasket to move in the circumferential direction synchronously, the steel wire is pulled, and the signal transmitting device is triggered by the steel wire to transmit a bolt looseness signal. Therefore, the operation and maintenance work is simplified, the timeliness and the accuracy of the bolt loosening fault discovery are improved, and the influence of artificial factors on the work is eliminated.
The invention also provides a bolt looseness monitoring method using the bolt looseness monitoring device, which comprises the following steps: the first end part of the magnetic gasket is sleeved on the screw rod, the first end part is clamped between the bolt head or the nut and the part to be connected, the second end part extends outwards and stretches out of the bolt head or the nut, a steel wire is arranged in the steel wire hole in a penetrating mode, the first end of the steel wire is fixed on the part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, when the bolt is loosened, the bolt or the nut drives the magnetic gasket to move circumferentially synchronously, the steel wire is pulled, and the signal transmitting device is triggered by the steel wire to transmit a bolt loosening signal.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1-4, the present embodiment provides a bolt looseness monitoring device, a plurality of bolts 1 are provided on flanges 3 of a wind generating set for connecting blades and hubs, a screw rod of each bolt 1 penetrates through two flanges 3 to connect the two flanges 3, and a nut 2 is connected to one end of each screw rod extending out of the flange 3 in a threaded manner.
Bolt looseness monitoring device includes: the monitoring device 4 and the signal transmitting device 5, the monitoring device 4 is used for monitoring the tightness degree between the bolt 1 and the flange plate 3, and the signal transmitting device 5 is used for transmitting a bolt loosening signal.
Further, the monitoring device 4 comprises a magnetic gasket 41 and a steel wire 42, the magnetic gasket 41 comprises a first end 411 and a second end 413, the first end 411 is provided with a bolt hole 412, the first end 411 is sleeved on the screw rod through the bolt hole 412, the first end 411 is clamped between the nut 2 and the flange 3, a magnet or a magnetic coating is arranged on one surface of the magnetic gasket 41, which is contacted with the nut 2, and the magnetic gasket 41 and the nut 2 have circumferential synchronous displacement; the magnetic gaskets 41 are in one-to-one correspondence with the number of the bolts 1, the distance between two adjacent magnetic gaskets 41 is equal, and the magnetic gaskets 41 are connected in series through a corrosion-resistant steel wire 42.
The magnetic gasket 41 has magnetic force effect with the nut 2 and the flange 3, so that the magnetic gasket 41 does not generate relative displacement in the axial direction when the bolt 1 is loosened, a magnet or a magnetic coating is arranged on the surface, which is contacted with the nut 2, of the magnetic gasket 41, the magnetic force of the surface, which is contacted with the nut 2, of the magnetic gasket 41 is larger than that of the surface, which is contacted with the flange 3, of the magnetic gasket 41, and therefore, the magnetic gasket 41 and the nut 2 are guaranteed to have circumferential synchronous displacement, and the timeliness and accuracy of bolt loosening detection are guaranteed.
The second end 413 of the magnetic gasket 41 extends outwards and stretches out of the nut 2, the second end 413 is provided with a steel wire hole 414 for penetrating the steel wire 42, the steel wire hole 414 extends to the upper surface of the second end 413 from the side face of the second end 413, the head end of the steel wire 42 is fixed on the flange 3, the tail of the steel wire 42 is led out from the magnetic gasket 41 which is connected in series and is fixedly connected with the signal transmitting device 5, the steel wire 42 is in a tensioning state, when the bolt 1 is loosened, the nut 2 drives the magnetic gasket 41 to synchronously move circumferentially and pull the steel wire 42, and the steel wire 42 triggers the signal transmitting device 5 to transmit a bolt loosening signal.
The signal transmitting device 5 comprises a tension switch, a shielding box and a transmitter, wherein the tension switch is arranged on the surface of the shielding box and fixedly connected with the tail end of the steel wire 42, the tension switch is used for controlling the opening and closing of the shielding box, the transmitter is arranged in the shielding box, the shielding box is used for shielding signals in a closed state, and the transmitter can outwards transmit bolt loosening signals in an open state of the shielding box.
Example 2
The embodiment provides a bolt looseness monitoring device, a plurality of bolts 1 are arranged on a flange plate 3, a screw rod of each bolt 1 penetrates through two flange plates 3 to connect the two flange plates 3, and one end of each screw rod extending out of the flange plate 3 is connected with a nut 2 in a threaded mode.
Bolt looseness monitoring device includes: the monitoring device 4 and the signal transmitting device 5, the monitoring device 4 is used for monitoring the tightness degree between the bolt 1 and the flange plate 3, and the signal transmitting device 5 is used for transmitting a bolt loosening signal.
Further, the monitoring device 4 comprises a magnetic gasket 41 and a steel wire 42, the magnetic gasket 41 comprises a first end 411 and a second end 413, the first end 411 is provided with a bolt hole 412, the first end 411 is sleeved on the screw rod through the bolt hole 412, the first end 411 is clamped between the bolt head of the bolt 1 and the flange 3, one surface of the magnetic gasket 41, which is contacted with the bolt head, is provided with a magnet or a magnetic coating, and the magnetic gasket 41 and the bolt 1 have circumferential synchronous displacement; the magnetic gaskets 41 are in one-to-one correspondence with the number of the bolts 1, the distance between two adjacent magnetic gaskets 41 is equal, and the magnetic gaskets 41 are connected in series through a corrosion-resistant steel wire 42.
The magnetic gasket 41 has magnetic force effect with the bolt head and the flange plate 3, so that the magnetic gasket 41 does not generate relative displacement in the axial direction when the bolt 1 is loosened, a magnet or a magnetic coating is arranged on one surface of the magnetic gasket 41, which is contacted with the bolt head, and the magnetic force of one surface of the magnetic gasket 41, which is contacted with the bolt head, is larger than that of one surface of the magnetic gasket 41, which is contacted with the flange plate 3, so that the magnetic gasket 41 and the bolt 1 are guaranteed to have circumferential synchronous displacement, and the timeliness and accuracy of bolt loosening detection are guaranteed.
The second end 413 of the magnetic gasket 41 extends outwards and stretches out of the bolt head, the second end 413 is provided with a steel wire hole 414 for penetrating the steel wire 42, the steel wire hole 414 extends to the upper surface of the second end 413 from the side face of the second end 413, the head end of the steel wire 42 is fixed on the flange plate 3, the tail of the steel wire 42 is led out of the magnetic gasket 41 which is connected in series and is fixedly connected with the signal transmitting device 5, the steel wire 42 is in a tensioning state, when the bolt 1 loosens, the bolt 1 drives the magnetic gasket 41 to synchronously move circumferentially and pull the steel wire 42, and the steel wire 42 triggers the signal transmitting device 5 to transmit a bolt looseness signal.
The signal transmitting device 5 comprises a tension switch, a shielding box and a transmitter, wherein the tension switch is arranged on the surface of the shielding box and fixedly connected with the tail end of the steel wire 42, the tension switch is used for controlling the opening and closing of the shielding box, the transmitter is arranged in the shielding box, the shielding box is used for shielding signals in a closed state, and the transmitter can outwards transmit bolt loosening signals in an open state of the shielding box.
Example 3
The present embodiment provides a bolt looseness monitoring method using the bolt looseness monitoring device as described above, as shown in fig. 1-2:
the first end 411 of the magnetic gasket 41 is sleeved on the screw rod, the first end 411 is clamped between the bolt head or the nut 2 and the flange plate 3, the second end 413 extends outwards and extends out of the bolt head or the nut 2, a steel wire 42 is penetrated in a steel wire hole 414, the steel wire hole 414 extends from the side face of the second end 413 to the upper surface of the second end 413, the first end of the steel wire 42 is fixed on the flange plate 3, the tail of the steel wire 42 is led out from the magnetic gasket 41 which is connected in series and is fixedly connected with the signal transmitting device 5, the steel wire 42 is in a tensioning state, when the bolt 1 is loosened, the bolt 1 or the nut 2 drives the magnetic gasket 41 to synchronously move circumferentially, the steel wire 42 is pulled, and the steel wire 42 triggers the signal transmitting device 5 to transmit a bolt loosening signal.
It should be noted that, the bolt loosening monitoring device and the bolt loosening monitoring method in the present invention are not limited to the application field of the embodiment, and the application thereof can be extended to other industrial fields, and the monitoring and identification of the bolt connection state with the bolt device can be performed.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. Bolt looseness monitoring devices, the screw rod of bolt pass two wait to connect the part in order to connect two wait to connect the part, just the screw rod stretches out wait to connect the one end threaded connection of part has a nut, its characterized in that: comprising the following steps:
the monitoring device is used for monitoring tightness degree between the bolt and the part to be connected, the monitoring device comprises a magnetic gasket and a steel wire, the magnetic gasket comprises a first end part and a second end part, the first end part is provided with a bolt hole, the first end part is sleeved on the screw rod through the bolt hole, the first end part is clamped between the bolt head of the bolt and the part to be connected and has circumferential synchronous displacement, or the first end part is clamped between the nut and the part to be connected and has circumferential synchronous displacement; the second end extends outwards and stretches out of the bolt head or the nut, the second end is provided with a steel wire hole used for penetrating the steel wire, the head end of the steel wire is used for being fixed on the part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, when the bolt is loosened, the bolt or the nut drives the magnetic gasket to move circumferentially synchronously, and the steel wire is pulled to trigger the signal transmitting device to transmit a bolt loosening signal.
2. The bolt looseness monitoring device of claim 1, wherein: the wire hole extends from a side of the second end portion to an upper surface of the second end portion.
3. The bolt looseness monitoring device of claim 1, wherein: the steel wire is a corrosion resistant steel wire.
4. The bolt looseness monitoring device of claim 1, wherein: when the first end part is clamped between the bolt head and the part to be connected, a magnet or a magnetic coating is arranged on one surface of the magnetic gasket, which is contacted with the bolt head; when the first end part is clamped between the nut and the part to be connected, a magnet or a magnetic coating is arranged on one surface of the magnetic gasket, which is contacted with the nut.
5. The bolt looseness monitoring device of any of claims 1-4, wherein: when the device is used for monitoring looseness of a plurality of bolts, the magnetic gaskets are in one-to-one correspondence with the number of the bolts, the distance between two adjacent magnetic gaskets is equal, and the magnetic gaskets are connected in series through the steel wire.
6. The bolt looseness monitoring device of claim 5, wherein: the tail part of the steel wire is led out from the magnetic gasket which is connected in series and is fixedly connected with the signal transmitting device.
7. A bolt looseness monitoring method using the bolt looseness monitoring device described in any of claims 1 to 6, characterized in that: comprising the following steps:
the first end part of the magnetic gasket is sleeved on the screw rod, the first end part is clamped between the bolt head or the nut and the part to be connected, the second end part extends outwards and stretches out of the bolt head or the nut, the steel wire is arranged in the steel wire hole in a penetrating mode, the head end of the steel wire is fixed on the part to be connected, the tail end of the steel wire is fixedly connected with the signal transmitting device, the steel wire is in a tensioning state, and when the bolt is loosened, the bolt or the nut drives the magnetic gasket to move circumferentially synchronously, and the steel wire is pulled to trigger the signal transmitting device to transmit a bolt loosening signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810357769.7A CN108507609B (en) | 2018-04-20 | 2018-04-20 | Bolt loosening monitoring device and bolt loosening monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810357769.7A CN108507609B (en) | 2018-04-20 | 2018-04-20 | Bolt loosening monitoring device and bolt loosening monitoring method |
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| CN108507609A CN108507609A (en) | 2018-09-07 |
| CN108507609B true CN108507609B (en) | 2023-10-13 |
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| DE102019106580A1 (en) * | 2019-03-14 | 2020-09-17 | Wobben Properties Gmbh | Flange connection, wind turbine with the same, and method for monitoring the same |
| CN110231158B (en) * | 2019-07-05 | 2020-09-25 | 江苏轶一电力科技有限公司 | Iron tower bolt looseness monitoring devices |
| CN110346031B (en) * | 2019-07-29 | 2022-04-01 | 深圳市瑞博赛恩科技有限公司 | Advanced pre-control device based on fiber bragg grating |
| CN111341075B (en) * | 2020-03-06 | 2021-11-16 | 国家电投集团徐闻风力发电有限公司 | Alarm system and alarm method for looseness of bolts of wind turbine tower |
| CN111829768B (en) * | 2020-07-28 | 2022-07-01 | 哈尔滨工业大学 | Bolt looseness perception device based on piezoelectric traction effect |
| CN113503806A (en) * | 2021-06-22 | 2021-10-15 | 同济大学 | Bolt anti-loosening intelligent monitoring device based on tail-connected angular displacement sensor |
| CN113588247B (en) * | 2021-08-30 | 2024-05-07 | 珠海铭熹智能科技有限公司 | Bolt loosening and breaking monitoring device |
| CN113916523A (en) * | 2021-10-09 | 2022-01-11 | 桂林数联自动化设备有限责任公司 | Bolt looseness monitoring device |
| CN117804749B (en) * | 2023-04-21 | 2024-05-31 | 南京中科智慧应急研究院有限公司 | Micro-vibration monitoring system for bolts |
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| CN108507609A (en) | 2018-09-07 |
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